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meta: remove unused variable
[mesa.git] / src / mesa / drivers / common / meta.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.6
4 *
5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * Meta operations. Some GL operations can be expressed in terms of
27 * other GL operations. For example, glBlitFramebuffer() can be done
28 * with texture mapping and glClear() can be done with polygon rendering.
29 *
30 * \author Brian Paul
31 */
32
33
34 #include "main/glheader.h"
35 #include "main/mtypes.h"
36 #include "main/imports.h"
37 #include "main/arbprogram.h"
38 #include "main/arrayobj.h"
39 #include "main/blend.h"
40 #include "main/bufferobj.h"
41 #include "main/buffers.h"
42 #include "main/colortab.h"
43 #include "main/condrender.h"
44 #include "main/depth.h"
45 #include "main/enable.h"
46 #include "main/fbobject.h"
47 #include "main/feedback.h"
48 #include "main/formats.h"
49 #include "main/glformats.h"
50 #include "main/image.h"
51 #include "main/macros.h"
52 #include "main/matrix.h"
53 #include "main/mipmap.h"
54 #include "main/pixel.h"
55 #include "main/pbo.h"
56 #include "main/polygon.h"
57 #include "main/readpix.h"
58 #include "main/scissor.h"
59 #include "main/shaderapi.h"
60 #include "main/shaderobj.h"
61 #include "main/state.h"
62 #include "main/stencil.h"
63 #include "main/texobj.h"
64 #include "main/texenv.h"
65 #include "main/texgetimage.h"
66 #include "main/teximage.h"
67 #include "main/texparam.h"
68 #include "main/texstate.h"
69 #include "main/transformfeedback.h"
70 #include "main/uniforms.h"
71 #include "main/varray.h"
72 #include "main/viewport.h"
73 #include "main/samplerobj.h"
74 #include "program/program.h"
75 #include "swrast/swrast.h"
76 #include "drivers/common/meta.h"
77 #include "main/enums.h"
78 #include "main/glformats.h"
79
80
81 /** Return offset in bytes of the field within a vertex struct */
82 #define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
83
84 /**
85 * State which we may save/restore across meta ops.
86 * XXX this may be incomplete...
87 */
88 struct save_state
89 {
90 GLbitfield SavedState; /**< bitmask of MESA_META_* flags */
91
92 /** MESA_META_ALPHA_TEST */
93 GLboolean AlphaEnabled;
94 GLenum AlphaFunc;
95 GLclampf AlphaRef;
96
97 /** MESA_META_BLEND */
98 GLbitfield BlendEnabled;
99 GLboolean ColorLogicOpEnabled;
100
101 /** MESA_META_COLOR_MASK */
102 GLubyte ColorMask[MAX_DRAW_BUFFERS][4];
103
104 /** MESA_META_DEPTH_TEST */
105 struct gl_depthbuffer_attrib Depth;
106
107 /** MESA_META_FOG */
108 GLboolean Fog;
109
110 /** MESA_META_PIXEL_STORE */
111 struct gl_pixelstore_attrib Pack, Unpack;
112
113 /** MESA_META_PIXEL_TRANSFER */
114 GLfloat RedBias, RedScale;
115 GLfloat GreenBias, GreenScale;
116 GLfloat BlueBias, BlueScale;
117 GLfloat AlphaBias, AlphaScale;
118 GLfloat DepthBias, DepthScale;
119 GLboolean MapColorFlag;
120
121 /** MESA_META_RASTERIZATION */
122 GLenum FrontPolygonMode, BackPolygonMode;
123 GLboolean PolygonOffset;
124 GLboolean PolygonSmooth;
125 GLboolean PolygonStipple;
126 GLboolean PolygonCull;
127
128 /** MESA_META_SCISSOR */
129 struct gl_scissor_attrib Scissor;
130
131 /** MESA_META_SHADER */
132 GLboolean VertexProgramEnabled;
133 struct gl_vertex_program *VertexProgram;
134 GLboolean FragmentProgramEnabled;
135 struct gl_fragment_program *FragmentProgram;
136 struct gl_shader_program *VertexShader;
137 struct gl_shader_program *GeometryShader;
138 struct gl_shader_program *FragmentShader;
139 struct gl_shader_program *ActiveShader;
140
141 /** MESA_META_STENCIL_TEST */
142 struct gl_stencil_attrib Stencil;
143
144 /** MESA_META_TRANSFORM */
145 GLenum MatrixMode;
146 GLfloat ModelviewMatrix[16];
147 GLfloat ProjectionMatrix[16];
148 GLfloat TextureMatrix[16];
149
150 /** MESA_META_CLIP */
151 GLbitfield ClipPlanesEnabled;
152
153 /** MESA_META_TEXTURE */
154 GLuint ActiveUnit;
155 GLuint ClientActiveUnit;
156 /** for unit[0] only */
157 struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS];
158 /** mask of TEXTURE_2D_BIT, etc */
159 GLbitfield TexEnabled[MAX_TEXTURE_UNITS];
160 GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS];
161 GLuint EnvMode; /* unit[0] only */
162
163 /** MESA_META_VERTEX */
164 struct gl_array_object *ArrayObj;
165 struct gl_buffer_object *ArrayBufferObj;
166
167 /** MESA_META_VIEWPORT */
168 GLint ViewportX, ViewportY, ViewportW, ViewportH;
169 GLclampd DepthNear, DepthFar;
170
171 /** MESA_META_CLAMP_FRAGMENT_COLOR */
172 GLenum ClampFragmentColor;
173
174 /** MESA_META_CLAMP_VERTEX_COLOR */
175 GLenum ClampVertexColor;
176
177 /** MESA_META_CONDITIONAL_RENDER */
178 struct gl_query_object *CondRenderQuery;
179 GLenum CondRenderMode;
180
181 #if FEATURE_feedback
182 /** MESA_META_SELECT_FEEDBACK */
183 GLenum RenderMode;
184 struct gl_selection Select;
185 struct gl_feedback Feedback;
186 #endif
187
188 /** MESA_META_MULTISAMPLE */
189 GLboolean MultisampleEnabled;
190
191 /** Miscellaneous (always disabled) */
192 GLboolean Lighting;
193 GLboolean RasterDiscard;
194 #if FEATURE_EXT_transform_feedback
195 GLboolean TransformFeedbackNeedsResume;
196 #endif
197 };
198
199 /**
200 * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.
201 * This is currently shared by all the meta ops. But we could create a
202 * separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc.
203 */
204 struct temp_texture
205 {
206 GLuint TexObj;
207 GLenum Target; /**< GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE */
208 GLsizei MinSize; /**< Min texture size to allocate */
209 GLsizei MaxSize; /**< Max possible texture size */
210 GLboolean NPOT; /**< Non-power of two size OK? */
211 GLsizei Width, Height; /**< Current texture size */
212 GLenum IntFormat;
213 GLfloat Sright, Ttop; /**< right, top texcoords */
214 };
215
216
217 /**
218 * State for glBlitFramebufer()
219 */
220 struct blit_state
221 {
222 GLuint ArrayObj;
223 GLuint VBO;
224 GLuint DepthFP;
225 };
226
227
228 /**
229 * State for glClear()
230 */
231 struct clear_state
232 {
233 GLuint ArrayObj;
234 GLuint VBO;
235 GLuint ShaderProg;
236 GLint ColorLocation;
237
238 GLuint IntegerShaderProg;
239 GLint IntegerColorLocation;
240 };
241
242
243 /**
244 * State for glCopyPixels()
245 */
246 struct copypix_state
247 {
248 GLuint ArrayObj;
249 GLuint VBO;
250 };
251
252
253 /**
254 * State for glDrawPixels()
255 */
256 struct drawpix_state
257 {
258 GLuint ArrayObj;
259
260 GLuint StencilFP; /**< Fragment program for drawing stencil images */
261 GLuint DepthFP; /**< Fragment program for drawing depth images */
262 };
263
264
265 /**
266 * State for glBitmap()
267 */
268 struct bitmap_state
269 {
270 GLuint ArrayObj;
271 GLuint VBO;
272 struct temp_texture Tex; /**< separate texture from other meta ops */
273 };
274
275
276 /**
277 * State for _mesa_meta_generate_mipmap()
278 */
279 struct gen_mipmap_state
280 {
281 GLuint ArrayObj;
282 GLuint VBO;
283 GLuint FBO;
284 GLuint Sampler;
285 };
286
287
288 /**
289 * State for texture decompression
290 */
291 struct decompress_state
292 {
293 GLuint ArrayObj;
294 GLuint VBO, FBO, RBO, Sampler;
295 GLint Width, Height;
296 };
297
298 /**
299 * State for glDrawTex()
300 */
301 struct drawtex_state
302 {
303 GLuint ArrayObj;
304 GLuint VBO;
305 };
306
307 #define MAX_META_OPS_DEPTH 8
308 /**
309 * All per-context meta state.
310 */
311 struct gl_meta_state
312 {
313 /** Stack of state saved during meta-ops */
314 struct save_state Save[MAX_META_OPS_DEPTH];
315 /** Save stack depth */
316 GLuint SaveStackDepth;
317
318 struct temp_texture TempTex;
319
320 struct blit_state Blit; /**< For _mesa_meta_BlitFramebuffer() */
321 struct clear_state Clear; /**< For _mesa_meta_Clear() */
322 struct copypix_state CopyPix; /**< For _mesa_meta_CopyPixels() */
323 struct drawpix_state DrawPix; /**< For _mesa_meta_DrawPixels() */
324 struct bitmap_state Bitmap; /**< For _mesa_meta_Bitmap() */
325 struct gen_mipmap_state Mipmap; /**< For _mesa_meta_GenerateMipmap() */
326 struct decompress_state Decompress; /**< For texture decompression */
327 struct drawtex_state DrawTex; /**< For _mesa_meta_DrawTex() */
328 };
329
330 static void meta_glsl_blit_cleanup(struct gl_context *ctx, struct blit_state *blit);
331 static void cleanup_temp_texture(struct gl_context *ctx, struct temp_texture *tex);
332 static void meta_glsl_clear_cleanup(struct gl_context *ctx, struct clear_state *clear);
333
334 static GLuint
335 compile_shader_with_debug(struct gl_context *ctx, GLenum target, const GLcharARB *source)
336 {
337 GLuint shader;
338 GLint ok, size;
339 GLchar *info;
340
341 shader = _mesa_CreateShaderObjectARB(target);
342 _mesa_ShaderSourceARB(shader, 1, &source, NULL);
343 _mesa_CompileShaderARB(shader);
344
345 _mesa_GetShaderiv(shader, GL_COMPILE_STATUS, &ok);
346 if (ok)
347 return shader;
348
349 _mesa_GetShaderiv(shader, GL_INFO_LOG_LENGTH, &size);
350 if (size == 0) {
351 _mesa_DeleteObjectARB(shader);
352 return 0;
353 }
354
355 info = malloc(size);
356 if (!info) {
357 _mesa_DeleteObjectARB(shader);
358 return 0;
359 }
360
361 _mesa_GetProgramInfoLog(shader, size, NULL, info);
362 _mesa_problem(ctx,
363 "meta program compile failed:\n%s\n"
364 "source:\n%s\n",
365 info, source);
366
367 free(info);
368 _mesa_DeleteObjectARB(shader);
369
370 return 0;
371 }
372
373 static GLuint
374 link_program_with_debug(struct gl_context *ctx, GLuint program)
375 {
376 GLint ok, size;
377 GLchar *info;
378
379 _mesa_LinkProgramARB(program);
380
381 _mesa_GetProgramiv(program, GL_LINK_STATUS, &ok);
382 if (ok)
383 return program;
384
385 _mesa_GetProgramiv(program, GL_INFO_LOG_LENGTH, &size);
386 if (size == 0)
387 return 0;
388
389 info = malloc(size);
390 if (!info)
391 return 0;
392
393 _mesa_GetProgramInfoLog(program, size, NULL, info);
394 _mesa_problem(ctx, "meta program link failed:\n%s", info);
395
396 free(info);
397
398 return 0;
399 }
400
401 /**
402 * Initialize meta-ops for a context.
403 * To be called once during context creation.
404 */
405 void
406 _mesa_meta_init(struct gl_context *ctx)
407 {
408 ASSERT(!ctx->Meta);
409
410 ctx->Meta = CALLOC_STRUCT(gl_meta_state);
411 }
412
413
414 /**
415 * Free context meta-op state.
416 * To be called once during context destruction.
417 */
418 void
419 _mesa_meta_free(struct gl_context *ctx)
420 {
421 GET_CURRENT_CONTEXT(old_context);
422 _mesa_make_current(ctx, NULL, NULL);
423 meta_glsl_blit_cleanup(ctx, &ctx->Meta->Blit);
424 meta_glsl_clear_cleanup(ctx, &ctx->Meta->Clear);
425 cleanup_temp_texture(ctx, &ctx->Meta->TempTex);
426 if (old_context)
427 _mesa_make_current(old_context, old_context->WinSysDrawBuffer, old_context->WinSysReadBuffer);
428 else
429 _mesa_make_current(NULL, NULL, NULL);
430 free(ctx->Meta);
431 ctx->Meta = NULL;
432 }
433
434
435 /**
436 * Enter meta state. This is like a light-weight version of glPushAttrib
437 * but it also resets most GL state back to default values.
438 *
439 * \param state bitmask of MESA_META_* flags indicating which attribute groups
440 * to save and reset to their defaults
441 */
442 void
443 _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
444 {
445 struct save_state *save;
446
447 /* hope MAX_META_OPS_DEPTH is large enough */
448 assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
449
450 save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
451 memset(save, 0, sizeof(*save));
452 save->SavedState = state;
453
454 #if FEATURE_EXT_transform_feedback
455 /* Pausing transform feedback needs to be done early, or else we won't be
456 * able to change other state.
457 */
458 save->TransformFeedbackNeedsResume =
459 ctx->TransformFeedback.CurrentObject->Active &&
460 !ctx->TransformFeedback.CurrentObject->Paused;
461 if (save->TransformFeedbackNeedsResume)
462 _mesa_PauseTransformFeedback();
463 #endif
464
465 if (state & MESA_META_ALPHA_TEST) {
466 save->AlphaEnabled = ctx->Color.AlphaEnabled;
467 save->AlphaFunc = ctx->Color.AlphaFunc;
468 save->AlphaRef = ctx->Color.AlphaRef;
469 if (ctx->Color.AlphaEnabled)
470 _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);
471 }
472
473 if (state & MESA_META_BLEND) {
474 save->BlendEnabled = ctx->Color.BlendEnabled;
475 if (ctx->Color.BlendEnabled) {
476 if (ctx->Extensions.EXT_draw_buffers2) {
477 GLuint i;
478 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
479 _mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);
480 }
481 }
482 else {
483 _mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
484 }
485 }
486 save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
487 if (ctx->Color.ColorLogicOpEnabled)
488 _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
489 }
490
491 if (state & MESA_META_COLOR_MASK) {
492 memcpy(save->ColorMask, ctx->Color.ColorMask,
493 sizeof(ctx->Color.ColorMask));
494 if (!ctx->Color.ColorMask[0][0] ||
495 !ctx->Color.ColorMask[0][1] ||
496 !ctx->Color.ColorMask[0][2] ||
497 !ctx->Color.ColorMask[0][3])
498 _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
499 }
500
501 if (state & MESA_META_DEPTH_TEST) {
502 save->Depth = ctx->Depth; /* struct copy */
503 if (ctx->Depth.Test)
504 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
505 }
506
507 if (state & MESA_META_FOG) {
508 save->Fog = ctx->Fog.Enabled;
509 if (ctx->Fog.Enabled)
510 _mesa_set_enable(ctx, GL_FOG, GL_FALSE);
511 }
512
513 if (state & MESA_META_PIXEL_STORE) {
514 save->Pack = ctx->Pack;
515 save->Unpack = ctx->Unpack;
516 ctx->Pack = ctx->DefaultPacking;
517 ctx->Unpack = ctx->DefaultPacking;
518 }
519
520 if (state & MESA_META_PIXEL_TRANSFER) {
521 save->RedScale = ctx->Pixel.RedScale;
522 save->RedBias = ctx->Pixel.RedBias;
523 save->GreenScale = ctx->Pixel.GreenScale;
524 save->GreenBias = ctx->Pixel.GreenBias;
525 save->BlueScale = ctx->Pixel.BlueScale;
526 save->BlueBias = ctx->Pixel.BlueBias;
527 save->AlphaScale = ctx->Pixel.AlphaScale;
528 save->AlphaBias = ctx->Pixel.AlphaBias;
529 save->MapColorFlag = ctx->Pixel.MapColorFlag;
530 ctx->Pixel.RedScale = 1.0F;
531 ctx->Pixel.RedBias = 0.0F;
532 ctx->Pixel.GreenScale = 1.0F;
533 ctx->Pixel.GreenBias = 0.0F;
534 ctx->Pixel.BlueScale = 1.0F;
535 ctx->Pixel.BlueBias = 0.0F;
536 ctx->Pixel.AlphaScale = 1.0F;
537 ctx->Pixel.AlphaBias = 0.0F;
538 ctx->Pixel.MapColorFlag = GL_FALSE;
539 /* XXX more state */
540 ctx->NewState |=_NEW_PIXEL;
541 }
542
543 if (state & MESA_META_RASTERIZATION) {
544 save->FrontPolygonMode = ctx->Polygon.FrontMode;
545 save->BackPolygonMode = ctx->Polygon.BackMode;
546 save->PolygonOffset = ctx->Polygon.OffsetFill;
547 save->PolygonSmooth = ctx->Polygon.SmoothFlag;
548 save->PolygonStipple = ctx->Polygon.StippleFlag;
549 save->PolygonCull = ctx->Polygon.CullFlag;
550 _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
551 _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);
552 _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);
553 _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);
554 _mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);
555 }
556
557 if (state & MESA_META_SCISSOR) {
558 save->Scissor = ctx->Scissor; /* struct copy */
559 _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);
560 }
561
562 if (state & MESA_META_SHADER) {
563 if (ctx->Extensions.ARB_vertex_program) {
564 save->VertexProgramEnabled = ctx->VertexProgram.Enabled;
565 _mesa_reference_vertprog(ctx, &save->VertexProgram,
566 ctx->VertexProgram.Current);
567 _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE);
568 }
569
570 if (ctx->Extensions.ARB_fragment_program) {
571 save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled;
572 _mesa_reference_fragprog(ctx, &save->FragmentProgram,
573 ctx->FragmentProgram.Current);
574 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE);
575 }
576
577 if (ctx->Extensions.ARB_shader_objects) {
578 _mesa_reference_shader_program(ctx, &save->VertexShader,
579 ctx->Shader.CurrentVertexProgram);
580 _mesa_reference_shader_program(ctx, &save->GeometryShader,
581 ctx->Shader.CurrentGeometryProgram);
582 _mesa_reference_shader_program(ctx, &save->FragmentShader,
583 ctx->Shader.CurrentFragmentProgram);
584 _mesa_reference_shader_program(ctx, &save->ActiveShader,
585 ctx->Shader.ActiveProgram);
586
587 _mesa_UseProgramObjectARB(0);
588 }
589 }
590
591 if (state & MESA_META_STENCIL_TEST) {
592 save->Stencil = ctx->Stencil; /* struct copy */
593 if (ctx->Stencil.Enabled)
594 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
595 /* NOTE: other stencil state not reset */
596 }
597
598 if (state & MESA_META_TEXTURE) {
599 GLuint u, tgt;
600
601 save->ActiveUnit = ctx->Texture.CurrentUnit;
602 save->ClientActiveUnit = ctx->Array.ActiveTexture;
603 save->EnvMode = ctx->Texture.Unit[0].EnvMode;
604
605 /* Disable all texture units */
606 for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
607 save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled;
608 save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled;
609 if (ctx->Texture.Unit[u].Enabled ||
610 ctx->Texture.Unit[u].TexGenEnabled) {
611 _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
612 _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);
613 _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);
614 _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE);
615 if (ctx->Extensions.ARB_texture_cube_map)
616 _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);
617 if (ctx->Extensions.NV_texture_rectangle)
618 _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE);
619 if (ctx->Extensions.OES_EGL_image_external)
620 _mesa_set_enable(ctx, GL_TEXTURE_EXTERNAL_OES, GL_FALSE);
621 _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);
622 _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);
623 _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);
624 _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
625 }
626 }
627
628 /* save current texture objects for unit[0] only */
629 for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
630 _mesa_reference_texobj(&save->CurrentTexture[tgt],
631 ctx->Texture.Unit[0].CurrentTex[tgt]);
632 }
633
634 /* set defaults for unit[0] */
635 _mesa_ActiveTextureARB(GL_TEXTURE0);
636 _mesa_ClientActiveTextureARB(GL_TEXTURE0);
637 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
638 }
639
640 if (state & MESA_META_TRANSFORM) {
641 GLuint activeTexture = ctx->Texture.CurrentUnit;
642 memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,
643 16 * sizeof(GLfloat));
644 memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,
645 16 * sizeof(GLfloat));
646 memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m,
647 16 * sizeof(GLfloat));
648 save->MatrixMode = ctx->Transform.MatrixMode;
649 /* set 1:1 vertex:pixel coordinate transform */
650 _mesa_ActiveTextureARB(GL_TEXTURE0);
651 _mesa_MatrixMode(GL_TEXTURE);
652 _mesa_LoadIdentity();
653 _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
654 _mesa_MatrixMode(GL_MODELVIEW);
655 _mesa_LoadIdentity();
656 _mesa_MatrixMode(GL_PROJECTION);
657 _mesa_LoadIdentity();
658 _mesa_Ortho(0.0, ctx->DrawBuffer->Width,
659 0.0, ctx->DrawBuffer->Height,
660 -1.0, 1.0);
661 }
662
663 if (state & MESA_META_CLIP) {
664 save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;
665 if (ctx->Transform.ClipPlanesEnabled) {
666 GLuint i;
667 for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
668 _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
669 }
670 }
671 }
672
673 if (state & MESA_META_VERTEX) {
674 /* save vertex array object state */
675 _mesa_reference_array_object(ctx, &save->ArrayObj,
676 ctx->Array.ArrayObj);
677 _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj,
678 ctx->Array.ArrayBufferObj);
679 /* set some default state? */
680 }
681
682 if (state & MESA_META_VIEWPORT) {
683 /* save viewport state */
684 save->ViewportX = ctx->Viewport.X;
685 save->ViewportY = ctx->Viewport.Y;
686 save->ViewportW = ctx->Viewport.Width;
687 save->ViewportH = ctx->Viewport.Height;
688 /* set viewport to match window size */
689 if (ctx->Viewport.X != 0 ||
690 ctx->Viewport.Y != 0 ||
691 ctx->Viewport.Width != ctx->DrawBuffer->Width ||
692 ctx->Viewport.Height != ctx->DrawBuffer->Height) {
693 _mesa_set_viewport(ctx, 0, 0,
694 ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
695 }
696 /* save depth range state */
697 save->DepthNear = ctx->Viewport.Near;
698 save->DepthFar = ctx->Viewport.Far;
699 /* set depth range to default */
700 _mesa_DepthRange(0.0, 1.0);
701 }
702
703 if (state & MESA_META_CLAMP_FRAGMENT_COLOR) {
704 save->ClampFragmentColor = ctx->Color.ClampFragmentColor;
705
706 /* Generally in here we want to do clamping according to whether
707 * it's for the pixel path (ClampFragmentColor is GL_TRUE),
708 * regardless of the internal implementation of the metaops.
709 */
710 if (ctx->Color.ClampFragmentColor != GL_TRUE)
711 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
712 }
713
714 if (state & MESA_META_CLAMP_VERTEX_COLOR) {
715 save->ClampVertexColor = ctx->Light.ClampVertexColor;
716
717 /* Generally in here we never want vertex color clamping --
718 * result clamping is only dependent on fragment clamping.
719 */
720 _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, GL_FALSE);
721 }
722
723 if (state & MESA_META_CONDITIONAL_RENDER) {
724 save->CondRenderQuery = ctx->Query.CondRenderQuery;
725 save->CondRenderMode = ctx->Query.CondRenderMode;
726
727 if (ctx->Query.CondRenderQuery)
728 _mesa_EndConditionalRender();
729 }
730
731 #if FEATURE_feedback
732 if (state & MESA_META_SELECT_FEEDBACK) {
733 save->RenderMode = ctx->RenderMode;
734 if (ctx->RenderMode == GL_SELECT) {
735 save->Select = ctx->Select; /* struct copy */
736 _mesa_RenderMode(GL_RENDER);
737 } else if (ctx->RenderMode == GL_FEEDBACK) {
738 save->Feedback = ctx->Feedback; /* struct copy */
739 _mesa_RenderMode(GL_RENDER);
740 }
741 }
742 #endif
743
744 if (state & MESA_META_MULTISAMPLE) {
745 save->MultisampleEnabled = ctx->Multisample.Enabled;
746 if (ctx->Multisample.Enabled)
747 _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_FALSE);
748 }
749
750 /* misc */
751 {
752 save->Lighting = ctx->Light.Enabled;
753 if (ctx->Light.Enabled)
754 _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);
755 save->RasterDiscard = ctx->RasterDiscard;
756 if (ctx->RasterDiscard)
757 _mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_FALSE);
758 }
759 }
760
761
762 /**
763 * Leave meta state. This is like a light-weight version of glPopAttrib().
764 */
765 void
766 _mesa_meta_end(struct gl_context *ctx)
767 {
768 struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];
769 const GLbitfield state = save->SavedState;
770
771 if (state & MESA_META_ALPHA_TEST) {
772 if (ctx->Color.AlphaEnabled != save->AlphaEnabled)
773 _mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);
774 _mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);
775 }
776
777 if (state & MESA_META_BLEND) {
778 if (ctx->Color.BlendEnabled != save->BlendEnabled) {
779 if (ctx->Extensions.EXT_draw_buffers2) {
780 GLuint i;
781 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
782 _mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);
783 }
784 }
785 else {
786 _mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));
787 }
788 }
789 if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
790 _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
791 }
792
793 if (state & MESA_META_COLOR_MASK) {
794 GLuint i;
795 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
796 if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {
797 if (i == 0) {
798 _mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],
799 save->ColorMask[i][2], save->ColorMask[i][3]);
800 }
801 else {
802 _mesa_ColorMaskIndexed(i,
803 save->ColorMask[i][0],
804 save->ColorMask[i][1],
805 save->ColorMask[i][2],
806 save->ColorMask[i][3]);
807 }
808 }
809 }
810 }
811
812 if (state & MESA_META_DEPTH_TEST) {
813 if (ctx->Depth.Test != save->Depth.Test)
814 _mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);
815 _mesa_DepthFunc(save->Depth.Func);
816 _mesa_DepthMask(save->Depth.Mask);
817 }
818
819 if (state & MESA_META_FOG) {
820 _mesa_set_enable(ctx, GL_FOG, save->Fog);
821 }
822
823 if (state & MESA_META_PIXEL_STORE) {
824 ctx->Pack = save->Pack;
825 ctx->Unpack = save->Unpack;
826 }
827
828 if (state & MESA_META_PIXEL_TRANSFER) {
829 ctx->Pixel.RedScale = save->RedScale;
830 ctx->Pixel.RedBias = save->RedBias;
831 ctx->Pixel.GreenScale = save->GreenScale;
832 ctx->Pixel.GreenBias = save->GreenBias;
833 ctx->Pixel.BlueScale = save->BlueScale;
834 ctx->Pixel.BlueBias = save->BlueBias;
835 ctx->Pixel.AlphaScale = save->AlphaScale;
836 ctx->Pixel.AlphaBias = save->AlphaBias;
837 ctx->Pixel.MapColorFlag = save->MapColorFlag;
838 /* XXX more state */
839 ctx->NewState |=_NEW_PIXEL;
840 }
841
842 if (state & MESA_META_RASTERIZATION) {
843 _mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);
844 _mesa_PolygonMode(GL_BACK, save->BackPolygonMode);
845 _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);
846 _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);
847 _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);
848 _mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);
849 }
850
851 if (state & MESA_META_SCISSOR) {
852 _mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);
853 _mesa_Scissor(save->Scissor.X, save->Scissor.Y,
854 save->Scissor.Width, save->Scissor.Height);
855 }
856
857 if (state & MESA_META_SHADER) {
858 if (ctx->Extensions.ARB_vertex_program) {
859 _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB,
860 save->VertexProgramEnabled);
861 _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
862 save->VertexProgram);
863 _mesa_reference_vertprog(ctx, &save->VertexProgram, NULL);
864 }
865
866 if (ctx->Extensions.ARB_fragment_program) {
867 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB,
868 save->FragmentProgramEnabled);
869 _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
870 save->FragmentProgram);
871 _mesa_reference_fragprog(ctx, &save->FragmentProgram, NULL);
872 }
873
874 if (ctx->Extensions.ARB_vertex_shader)
875 _mesa_use_shader_program(ctx, GL_VERTEX_SHADER, save->VertexShader);
876
877 if (ctx->Extensions.ARB_geometry_shader4)
878 _mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER_ARB,
879 save->GeometryShader);
880
881 if (ctx->Extensions.ARB_fragment_shader)
882 _mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER,
883 save->FragmentShader);
884
885 _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram,
886 save->ActiveShader);
887
888 _mesa_reference_shader_program(ctx, &save->VertexShader, NULL);
889 _mesa_reference_shader_program(ctx, &save->GeometryShader, NULL);
890 _mesa_reference_shader_program(ctx, &save->FragmentShader, NULL);
891 _mesa_reference_shader_program(ctx, &save->ActiveShader, NULL);
892 }
893
894 if (state & MESA_META_STENCIL_TEST) {
895 const struct gl_stencil_attrib *stencil = &save->Stencil;
896
897 _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
898 _mesa_ClearStencil(stencil->Clear);
899 if (ctx->Extensions.EXT_stencil_two_side) {
900 _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
901 stencil->TestTwoSide);
902 _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
903 ? GL_BACK : GL_FRONT);
904 }
905 /* front state */
906 _mesa_StencilFuncSeparate(GL_FRONT,
907 stencil->Function[0],
908 stencil->Ref[0],
909 stencil->ValueMask[0]);
910 _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
911 _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
912 stencil->ZFailFunc[0],
913 stencil->ZPassFunc[0]);
914 /* back state */
915 _mesa_StencilFuncSeparate(GL_BACK,
916 stencil->Function[1],
917 stencil->Ref[1],
918 stencil->ValueMask[1]);
919 _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
920 _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
921 stencil->ZFailFunc[1],
922 stencil->ZPassFunc[1]);
923 }
924
925 if (state & MESA_META_TEXTURE) {
926 GLuint u, tgt;
927
928 ASSERT(ctx->Texture.CurrentUnit == 0);
929
930 /* restore texenv for unit[0] */
931 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);
932
933 /* restore texture objects for unit[0] only */
934 for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
935 if (ctx->Texture.Unit[0].CurrentTex[tgt] != save->CurrentTexture[tgt]) {
936 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
937 _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
938 save->CurrentTexture[tgt]);
939 }
940 _mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
941 }
942
943 /* Restore fixed function texture enables, texgen */
944 for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
945 if (ctx->Texture.Unit[u].Enabled != save->TexEnabled[u]) {
946 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
947 ctx->Texture.Unit[u].Enabled = save->TexEnabled[u];
948 }
949
950 if (ctx->Texture.Unit[u].TexGenEnabled != save->TexGenEnabled[u]) {
951 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
952 ctx->Texture.Unit[u].TexGenEnabled = save->TexGenEnabled[u];
953 }
954 }
955
956 /* restore current unit state */
957 _mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit);
958 _mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit);
959 }
960
961 if (state & MESA_META_TRANSFORM) {
962 GLuint activeTexture = ctx->Texture.CurrentUnit;
963 _mesa_ActiveTextureARB(GL_TEXTURE0);
964 _mesa_MatrixMode(GL_TEXTURE);
965 _mesa_LoadMatrixf(save->TextureMatrix);
966 _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
967
968 _mesa_MatrixMode(GL_MODELVIEW);
969 _mesa_LoadMatrixf(save->ModelviewMatrix);
970
971 _mesa_MatrixMode(GL_PROJECTION);
972 _mesa_LoadMatrixf(save->ProjectionMatrix);
973
974 _mesa_MatrixMode(save->MatrixMode);
975 }
976
977 if (state & MESA_META_CLIP) {
978 if (save->ClipPlanesEnabled) {
979 GLuint i;
980 for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
981 if (save->ClipPlanesEnabled & (1 << i)) {
982 _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
983 }
984 }
985 }
986 }
987
988 if (state & MESA_META_VERTEX) {
989 /* restore vertex buffer object */
990 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name);
991 _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL);
992
993 /* restore vertex array object */
994 _mesa_BindVertexArray(save->ArrayObj->Name);
995 _mesa_reference_array_object(ctx, &save->ArrayObj, NULL);
996 }
997
998 if (state & MESA_META_VIEWPORT) {
999 if (save->ViewportX != ctx->Viewport.X ||
1000 save->ViewportY != ctx->Viewport.Y ||
1001 save->ViewportW != ctx->Viewport.Width ||
1002 save->ViewportH != ctx->Viewport.Height) {
1003 _mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,
1004 save->ViewportW, save->ViewportH);
1005 }
1006 _mesa_DepthRange(save->DepthNear, save->DepthFar);
1007 }
1008
1009 if (state & MESA_META_CLAMP_FRAGMENT_COLOR) {
1010 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, save->ClampFragmentColor);
1011 }
1012
1013 if (state & MESA_META_CLAMP_VERTEX_COLOR) {
1014 _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, save->ClampVertexColor);
1015 }
1016
1017 if (state & MESA_META_CONDITIONAL_RENDER) {
1018 if (save->CondRenderQuery)
1019 _mesa_BeginConditionalRender(save->CondRenderQuery->Id,
1020 save->CondRenderMode);
1021 }
1022
1023 #if FEATURE_feedback
1024 if (state & MESA_META_SELECT_FEEDBACK) {
1025 if (save->RenderMode == GL_SELECT) {
1026 _mesa_RenderMode(GL_SELECT);
1027 ctx->Select = save->Select;
1028 } else if (save->RenderMode == GL_FEEDBACK) {
1029 _mesa_RenderMode(GL_FEEDBACK);
1030 ctx->Feedback = save->Feedback;
1031 }
1032 }
1033 #endif
1034
1035 if (state & MESA_META_MULTISAMPLE) {
1036 if (ctx->Multisample.Enabled != save->MultisampleEnabled)
1037 _mesa_set_enable(ctx, GL_MULTISAMPLE, save->MultisampleEnabled);
1038 }
1039
1040 /* misc */
1041 if (save->Lighting) {
1042 _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);
1043 }
1044 if (save->RasterDiscard) {
1045 _mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_TRUE);
1046 }
1047 #if FEATURE_EXT_transform_feedback
1048 if (save->TransformFeedbackNeedsResume)
1049 _mesa_ResumeTransformFeedback();
1050 #endif
1051 }
1052
1053
1054 /**
1055 * Determine whether Mesa is currently in a meta state.
1056 */
1057 GLboolean
1058 _mesa_meta_in_progress(struct gl_context *ctx)
1059 {
1060 return ctx->Meta->SaveStackDepth != 0;
1061 }
1062
1063
1064 /**
1065 * Convert Z from a normalized value in the range [0, 1] to an object-space
1066 * Z coordinate in [-1, +1] so that drawing at the new Z position with the
1067 * default/identity ortho projection results in the original Z value.
1068 * Used by the meta-Clear, Draw/CopyPixels and Bitmap functions where the Z
1069 * value comes from the clear value or raster position.
1070 */
1071 static INLINE GLfloat
1072 invert_z(GLfloat normZ)
1073 {
1074 GLfloat objZ = 1.0f - 2.0f * normZ;
1075 return objZ;
1076 }
1077
1078
1079 /**
1080 * One-time init for a temp_texture object.
1081 * Choose tex target, compute max tex size, etc.
1082 */
1083 static void
1084 init_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
1085 {
1086 /* prefer texture rectangle */
1087 if (ctx->Extensions.NV_texture_rectangle) {
1088 tex->Target = GL_TEXTURE_RECTANGLE;
1089 tex->MaxSize = ctx->Const.MaxTextureRectSize;
1090 tex->NPOT = GL_TRUE;
1091 }
1092 else {
1093 /* use 2D texture, NPOT if possible */
1094 tex->Target = GL_TEXTURE_2D;
1095 tex->MaxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
1096 tex->NPOT = ctx->Extensions.ARB_texture_non_power_of_two;
1097 }
1098 tex->MinSize = 16; /* 16 x 16 at least */
1099 assert(tex->MaxSize > 0);
1100
1101 _mesa_GenTextures(1, &tex->TexObj);
1102 }
1103
1104 static void
1105 cleanup_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
1106 {
1107 if (!tex->TexObj)
1108 return;
1109 _mesa_DeleteTextures(1, &tex->TexObj);
1110 tex->TexObj = 0;
1111 }
1112
1113
1114 /**
1115 * Return pointer to temp_texture info for non-bitmap ops.
1116 * This does some one-time init if needed.
1117 */
1118 static struct temp_texture *
1119 get_temp_texture(struct gl_context *ctx)
1120 {
1121 struct temp_texture *tex = &ctx->Meta->TempTex;
1122
1123 if (!tex->TexObj) {
1124 init_temp_texture(ctx, tex);
1125 }
1126
1127 return tex;
1128 }
1129
1130
1131 /**
1132 * Return pointer to temp_texture info for _mesa_meta_bitmap().
1133 * We use a separate texture for bitmaps to reduce texture
1134 * allocation/deallocation.
1135 */
1136 static struct temp_texture *
1137 get_bitmap_temp_texture(struct gl_context *ctx)
1138 {
1139 struct temp_texture *tex = &ctx->Meta->Bitmap.Tex;
1140
1141 if (!tex->TexObj) {
1142 init_temp_texture(ctx, tex);
1143 }
1144
1145 return tex;
1146 }
1147
1148
1149 /**
1150 * Compute the width/height of texture needed to draw an image of the
1151 * given size. Return a flag indicating whether the current texture
1152 * can be re-used (glTexSubImage2D) or if a new texture needs to be
1153 * allocated (glTexImage2D).
1154 * Also, compute s/t texcoords for drawing.
1155 *
1156 * \return GL_TRUE if new texture is needed, GL_FALSE otherwise
1157 */
1158 static GLboolean
1159 alloc_texture(struct temp_texture *tex,
1160 GLsizei width, GLsizei height, GLenum intFormat)
1161 {
1162 GLboolean newTex = GL_FALSE;
1163
1164 ASSERT(width <= tex->MaxSize);
1165 ASSERT(height <= tex->MaxSize);
1166
1167 if (width > tex->Width ||
1168 height > tex->Height ||
1169 intFormat != tex->IntFormat) {
1170 /* alloc new texture (larger or different format) */
1171
1172 if (tex->NPOT) {
1173 /* use non-power of two size */
1174 tex->Width = MAX2(tex->MinSize, width);
1175 tex->Height = MAX2(tex->MinSize, height);
1176 }
1177 else {
1178 /* find power of two size */
1179 GLsizei w, h;
1180 w = h = tex->MinSize;
1181 while (w < width)
1182 w *= 2;
1183 while (h < height)
1184 h *= 2;
1185 tex->Width = w;
1186 tex->Height = h;
1187 }
1188
1189 tex->IntFormat = intFormat;
1190
1191 newTex = GL_TRUE;
1192 }
1193
1194 /* compute texcoords */
1195 if (tex->Target == GL_TEXTURE_RECTANGLE) {
1196 tex->Sright = (GLfloat) width;
1197 tex->Ttop = (GLfloat) height;
1198 }
1199 else {
1200 tex->Sright = (GLfloat) width / tex->Width;
1201 tex->Ttop = (GLfloat) height / tex->Height;
1202 }
1203
1204 return newTex;
1205 }
1206
1207
1208 /**
1209 * Setup/load texture for glCopyPixels or glBlitFramebuffer.
1210 */
1211 static void
1212 setup_copypix_texture(struct temp_texture *tex,
1213 GLboolean newTex,
1214 GLint srcX, GLint srcY,
1215 GLsizei width, GLsizei height, GLenum intFormat,
1216 GLenum filter)
1217 {
1218 _mesa_BindTexture(tex->Target, tex->TexObj);
1219 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, filter);
1220 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, filter);
1221 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1222
1223 /* copy framebuffer image to texture */
1224 if (newTex) {
1225 /* create new tex image */
1226 if (tex->Width == width && tex->Height == height) {
1227 /* create new tex with framebuffer data */
1228 _mesa_CopyTexImage2D(tex->Target, 0, tex->IntFormat,
1229 srcX, srcY, width, height, 0);
1230 }
1231 else {
1232 /* create empty texture */
1233 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1234 tex->Width, tex->Height, 0,
1235 intFormat, GL_UNSIGNED_BYTE, NULL);
1236 /* load image */
1237 _mesa_CopyTexSubImage2D(tex->Target, 0,
1238 0, 0, srcX, srcY, width, height);
1239 }
1240 }
1241 else {
1242 /* replace existing tex image */
1243 _mesa_CopyTexSubImage2D(tex->Target, 0,
1244 0, 0, srcX, srcY, width, height);
1245 }
1246 }
1247
1248
1249 /**
1250 * Setup/load texture for glDrawPixels.
1251 */
1252 static void
1253 setup_drawpix_texture(struct gl_context *ctx,
1254 struct temp_texture *tex,
1255 GLboolean newTex,
1256 GLenum texIntFormat,
1257 GLsizei width, GLsizei height,
1258 GLenum format, GLenum type,
1259 const GLvoid *pixels)
1260 {
1261 _mesa_BindTexture(tex->Target, tex->TexObj);
1262 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1263 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1264 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1265
1266 /* copy pixel data to texture */
1267 if (newTex) {
1268 /* create new tex image */
1269 if (tex->Width == width && tex->Height == height) {
1270 /* create new tex and load image data */
1271 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1272 tex->Width, tex->Height, 0, format, type, pixels);
1273 }
1274 else {
1275 struct gl_buffer_object *save_unpack_obj = NULL;
1276
1277 _mesa_reference_buffer_object(ctx, &save_unpack_obj,
1278 ctx->Unpack.BufferObj);
1279 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
1280 /* create empty texture */
1281 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1282 tex->Width, tex->Height, 0, format, type, NULL);
1283 if (save_unpack_obj != NULL)
1284 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB,
1285 save_unpack_obj->Name);
1286 /* load image */
1287 _mesa_TexSubImage2D(tex->Target, 0,
1288 0, 0, width, height, format, type, pixels);
1289 }
1290 }
1291 else {
1292 /* replace existing tex image */
1293 _mesa_TexSubImage2D(tex->Target, 0,
1294 0, 0, width, height, format, type, pixels);
1295 }
1296 }
1297
1298
1299
1300 /**
1301 * One-time init for drawing depth pixels.
1302 */
1303 static void
1304 init_blit_depth_pixels(struct gl_context *ctx)
1305 {
1306 static const char *program =
1307 "!!ARBfp1.0\n"
1308 "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
1309 "END \n";
1310 char program2[200];
1311 struct blit_state *blit = &ctx->Meta->Blit;
1312 struct temp_texture *tex = get_temp_texture(ctx);
1313 const char *texTarget;
1314
1315 assert(blit->DepthFP == 0);
1316
1317 /* replace %s with "RECT" or "2D" */
1318 assert(strlen(program) + 4 < sizeof(program2));
1319 if (tex->Target == GL_TEXTURE_RECTANGLE)
1320 texTarget = "RECT";
1321 else
1322 texTarget = "2D";
1323 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
1324
1325 _mesa_GenPrograms(1, &blit->DepthFP);
1326 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
1327 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
1328 strlen(program2), (const GLubyte *) program2);
1329 }
1330
1331
1332 /**
1333 * Try to do a glBlitFramebuffer using no-copy texturing.
1334 * We can do this when the src renderbuffer is actually a texture.
1335 * But if the src buffer == dst buffer we cannot do this.
1336 *
1337 * \return new buffer mask indicating the buffers left to blit using the
1338 * normal path.
1339 */
1340 static GLbitfield
1341 blitframebuffer_texture(struct gl_context *ctx,
1342 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1343 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1344 GLbitfield mask, GLenum filter)
1345 {
1346 if (mask & GL_COLOR_BUFFER_BIT) {
1347 const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
1348 const struct gl_framebuffer *readFb = ctx->ReadBuffer;
1349 const struct gl_renderbuffer_attachment *drawAtt =
1350 &drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]];
1351 const struct gl_renderbuffer_attachment *readAtt =
1352 &readFb->Attachment[readFb->_ColorReadBufferIndex];
1353
1354 if (readAtt && readAtt->Texture) {
1355 const struct gl_texture_object *texObj = readAtt->Texture;
1356 const GLuint srcLevel = readAtt->TextureLevel;
1357 const GLint baseLevelSave = texObj->BaseLevel;
1358 const GLint maxLevelSave = texObj->MaxLevel;
1359 const GLenum fbo_srgb_save = ctx->Color.sRGBEnabled;
1360 const GLenum target = texObj->Target;
1361 GLuint sampler, samplerSave =
1362 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
1363 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
1364
1365 if (drawAtt->Texture == readAtt->Texture) {
1366 /* Can't use same texture as both the source and dest. We need
1367 * to handle overlapping blits and besides, some hw may not
1368 * support this.
1369 */
1370 return mask;
1371 }
1372
1373 if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
1374 /* Can't handle other texture types at this time */
1375 return mask;
1376 }
1377
1378 _mesa_GenSamplers(1, &sampler);
1379 _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
1380
1381 /*
1382 printf("Blit from texture!\n");
1383 printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
1384 printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
1385 */
1386
1387 /* Prepare src texture state */
1388 _mesa_BindTexture(target, texObj->Name);
1389 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, filter);
1390 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, filter);
1391 if (target != GL_TEXTURE_RECTANGLE_ARB) {
1392 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
1393 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
1394 }
1395 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1396 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1397
1398 /* Always do our blits with no sRGB decode or encode.*/
1399 if (ctx->Extensions.EXT_texture_sRGB_decode) {
1400 _mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
1401 GL_SKIP_DECODE_EXT);
1402 }
1403 if (ctx->Extensions.EXT_framebuffer_sRGB) {
1404 _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
1405 }
1406
1407 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1408 _mesa_set_enable(ctx, target, GL_TRUE);
1409
1410 /* Prepare vertex data (the VBO was previously created and bound) */
1411 {
1412 struct vertex {
1413 GLfloat x, y, s, t;
1414 };
1415 struct vertex verts[4];
1416 GLfloat s0, t0, s1, t1;
1417
1418 if (target == GL_TEXTURE_2D) {
1419 const struct gl_texture_image *texImage
1420 = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
1421 s0 = srcX0 / (float) texImage->Width;
1422 s1 = srcX1 / (float) texImage->Width;
1423 t0 = srcY0 / (float) texImage->Height;
1424 t1 = srcY1 / (float) texImage->Height;
1425 }
1426 else {
1427 assert(target == GL_TEXTURE_RECTANGLE_ARB);
1428 s0 = srcX0;
1429 s1 = srcX1;
1430 t0 = srcY0;
1431 t1 = srcY1;
1432 }
1433
1434 verts[0].x = (GLfloat) dstX0;
1435 verts[0].y = (GLfloat) dstY0;
1436 verts[1].x = (GLfloat) dstX1;
1437 verts[1].y = (GLfloat) dstY0;
1438 verts[2].x = (GLfloat) dstX1;
1439 verts[2].y = (GLfloat) dstY1;
1440 verts[3].x = (GLfloat) dstX0;
1441 verts[3].y = (GLfloat) dstY1;
1442
1443 verts[0].s = s0;
1444 verts[0].t = t0;
1445 verts[1].s = s1;
1446 verts[1].t = t0;
1447 verts[2].s = s1;
1448 verts[2].t = t1;
1449 verts[3].s = s0;
1450 verts[3].t = t1;
1451
1452 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
1453 }
1454
1455 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1456
1457 /* Restore texture object state, the texture binding will
1458 * be restored by _mesa_meta_end().
1459 */
1460 if (target != GL_TEXTURE_RECTANGLE_ARB) {
1461 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
1462 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
1463 }
1464 if (ctx->Extensions.EXT_framebuffer_sRGB && fbo_srgb_save) {
1465 _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_TRUE);
1466 }
1467
1468 _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
1469 _mesa_DeleteSamplers(1, &sampler);
1470
1471 /* Done with color buffer */
1472 mask &= ~GL_COLOR_BUFFER_BIT;
1473 }
1474 }
1475
1476 return mask;
1477 }
1478
1479
1480 /**
1481 * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
1482 * of texture mapping and polygon rendering.
1483 */
1484 void
1485 _mesa_meta_BlitFramebuffer(struct gl_context *ctx,
1486 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1487 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1488 GLbitfield mask, GLenum filter)
1489 {
1490 struct blit_state *blit = &ctx->Meta->Blit;
1491 struct temp_texture *tex = get_temp_texture(ctx);
1492 const GLsizei maxTexSize = tex->MaxSize;
1493 const GLint srcX = MIN2(srcX0, srcX1);
1494 const GLint srcY = MIN2(srcY0, srcY1);
1495 const GLint srcW = abs(srcX1 - srcX0);
1496 const GLint srcH = abs(srcY1 - srcY0);
1497 const GLboolean srcFlipX = srcX1 < srcX0;
1498 const GLboolean srcFlipY = srcY1 < srcY0;
1499 struct vertex {
1500 GLfloat x, y, s, t;
1501 };
1502 struct vertex verts[4];
1503 GLboolean newTex;
1504
1505 /* In addition to falling back if the blit size is larger than the maximum
1506 * texture size, fallback if the source is multisampled. This fallback can
1507 * be removed once Mesa gets support ARB_texture_multisample.
1508 */
1509 if (srcW > maxTexSize || srcH > maxTexSize
1510 || ctx->ReadBuffer->Visual.samples > 0) {
1511 /* XXX avoid this fallback */
1512 _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
1513 dstX0, dstY0, dstX1, dstY1, mask, filter);
1514 return;
1515 }
1516
1517 if (srcFlipX) {
1518 GLint tmp = dstX0;
1519 dstX0 = dstX1;
1520 dstX1 = tmp;
1521 }
1522
1523 if (srcFlipY) {
1524 GLint tmp = dstY0;
1525 dstY0 = dstY1;
1526 dstY1 = tmp;
1527 }
1528
1529 /* only scissor effects blit so save/clear all other relevant state */
1530 _mesa_meta_begin(ctx, ~MESA_META_SCISSOR);
1531
1532 if (blit->ArrayObj == 0) {
1533 /* one-time setup */
1534
1535 /* create vertex array object */
1536 _mesa_GenVertexArrays(1, &blit->ArrayObj);
1537 _mesa_BindVertexArray(blit->ArrayObj);
1538
1539 /* create vertex array buffer */
1540 _mesa_GenBuffersARB(1, &blit->VBO);
1541 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
1542 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
1543 NULL, GL_DYNAMIC_DRAW_ARB);
1544
1545 /* setup vertex arrays */
1546 _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1547 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
1548 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1549 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
1550 }
1551 else {
1552 _mesa_BindVertexArray(blit->ArrayObj);
1553 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
1554 }
1555
1556 /* Try faster, direct texture approach first */
1557 mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
1558 dstX0, dstY0, dstX1, dstY1, mask, filter);
1559 if (mask == 0x0) {
1560 _mesa_meta_end(ctx);
1561 return;
1562 }
1563
1564 /* Continue with "normal" approach which involves copying the src rect
1565 * into a temporary texture and is "blitted" by drawing a textured quad.
1566 */
1567
1568 newTex = alloc_texture(tex, srcW, srcH, GL_RGBA);
1569
1570 /* vertex positions/texcoords (after texture allocation!) */
1571 {
1572 verts[0].x = (GLfloat) dstX0;
1573 verts[0].y = (GLfloat) dstY0;
1574 verts[1].x = (GLfloat) dstX1;
1575 verts[1].y = (GLfloat) dstY0;
1576 verts[2].x = (GLfloat) dstX1;
1577 verts[2].y = (GLfloat) dstY1;
1578 verts[3].x = (GLfloat) dstX0;
1579 verts[3].y = (GLfloat) dstY1;
1580
1581 verts[0].s = 0.0F;
1582 verts[0].t = 0.0F;
1583 verts[1].s = tex->Sright;
1584 verts[1].t = 0.0F;
1585 verts[2].s = tex->Sright;
1586 verts[2].t = tex->Ttop;
1587 verts[3].s = 0.0F;
1588 verts[3].t = tex->Ttop;
1589
1590 /* upload new vertex data */
1591 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
1592 }
1593
1594 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
1595
1596 if (mask & GL_COLOR_BUFFER_BIT) {
1597 setup_copypix_texture(tex, newTex, srcX, srcY, srcW, srcH,
1598 GL_RGBA, filter);
1599 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1600 mask &= ~GL_COLOR_BUFFER_BIT;
1601 }
1602
1603 if (mask & GL_DEPTH_BUFFER_BIT) {
1604 GLuint *tmp = (GLuint *) malloc(srcW * srcH * sizeof(GLuint));
1605 if (tmp) {
1606 if (!blit->DepthFP)
1607 init_blit_depth_pixels(ctx);
1608
1609 /* maybe change tex format here */
1610 newTex = alloc_texture(tex, srcW, srcH, GL_DEPTH_COMPONENT);
1611
1612 _mesa_ReadPixels(srcX, srcY, srcW, srcH,
1613 GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
1614
1615 setup_drawpix_texture(ctx, tex, newTex, GL_DEPTH_COMPONENT, srcW, srcH,
1616 GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
1617
1618 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
1619 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
1620 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1621 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1622 _mesa_DepthFunc(GL_ALWAYS);
1623 _mesa_DepthMask(GL_TRUE);
1624
1625 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1626 mask &= ~GL_DEPTH_BUFFER_BIT;
1627
1628 free(tmp);
1629 }
1630 }
1631
1632 if (mask & GL_STENCIL_BUFFER_BIT) {
1633 /* XXX can't easily do stencil */
1634 }
1635
1636 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
1637
1638 _mesa_meta_end(ctx);
1639
1640 if (mask) {
1641 _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
1642 dstX0, dstY0, dstX1, dstY1, mask, filter);
1643 }
1644 }
1645
1646 static void
1647 meta_glsl_blit_cleanup(struct gl_context *ctx, struct blit_state *blit)
1648 {
1649 if (blit->ArrayObj) {
1650 _mesa_DeleteVertexArraysAPPLE(1, &blit->ArrayObj);
1651 blit->ArrayObj = 0;
1652 _mesa_DeleteBuffersARB(1, &blit->VBO);
1653 blit->VBO = 0;
1654 }
1655 if (blit->DepthFP) {
1656 _mesa_DeletePrograms(1, &blit->DepthFP);
1657 blit->DepthFP = 0;
1658 }
1659 }
1660
1661
1662 /**
1663 * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
1664 */
1665 void
1666 _mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
1667 {
1668 struct clear_state *clear = &ctx->Meta->Clear;
1669 struct vertex {
1670 GLfloat x, y, z, r, g, b, a;
1671 };
1672 struct vertex verts[4];
1673 /* save all state but scissor, pixel pack/unpack */
1674 GLbitfield metaSave = (MESA_META_ALL -
1675 MESA_META_SCISSOR -
1676 MESA_META_PIXEL_STORE -
1677 MESA_META_CONDITIONAL_RENDER);
1678 const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
1679
1680 if (buffers & BUFFER_BITS_COLOR) {
1681 /* if clearing color buffers, don't save/restore colormask */
1682 metaSave -= MESA_META_COLOR_MASK;
1683 }
1684
1685 _mesa_meta_begin(ctx, metaSave);
1686
1687 if (clear->ArrayObj == 0) {
1688 /* one-time setup */
1689
1690 /* create vertex array object */
1691 _mesa_GenVertexArrays(1, &clear->ArrayObj);
1692 _mesa_BindVertexArray(clear->ArrayObj);
1693
1694 /* create vertex array buffer */
1695 _mesa_GenBuffersARB(1, &clear->VBO);
1696 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1697
1698 /* setup vertex arrays */
1699 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1700 _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
1701 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1702 _mesa_EnableClientState(GL_COLOR_ARRAY);
1703 }
1704 else {
1705 _mesa_BindVertexArray(clear->ArrayObj);
1706 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1707 }
1708
1709 /* GL_COLOR_BUFFER_BIT */
1710 if (buffers & BUFFER_BITS_COLOR) {
1711 /* leave colormask, glDrawBuffer state as-is */
1712
1713 /* Clears never have the color clamped. */
1714 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
1715 }
1716 else {
1717 ASSERT(metaSave & MESA_META_COLOR_MASK);
1718 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1719 }
1720
1721 /* GL_DEPTH_BUFFER_BIT */
1722 if (buffers & BUFFER_BIT_DEPTH) {
1723 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1724 _mesa_DepthFunc(GL_ALWAYS);
1725 _mesa_DepthMask(GL_TRUE);
1726 }
1727 else {
1728 assert(!ctx->Depth.Test);
1729 }
1730
1731 /* GL_STENCIL_BUFFER_BIT */
1732 if (buffers & BUFFER_BIT_STENCIL) {
1733 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
1734 _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
1735 GL_REPLACE, GL_REPLACE, GL_REPLACE);
1736 _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
1737 ctx->Stencil.Clear & stencilMax,
1738 ctx->Stencil.WriteMask[0]);
1739 }
1740 else {
1741 assert(!ctx->Stencil.Enabled);
1742 }
1743
1744 /* vertex positions/colors */
1745 {
1746 const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;
1747 const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin;
1748 const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;
1749 const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax;
1750 const GLfloat z = invert_z(ctx->Depth.Clear);
1751 GLuint i;
1752
1753 verts[0].x = x0;
1754 verts[0].y = y0;
1755 verts[0].z = z;
1756 verts[1].x = x1;
1757 verts[1].y = y0;
1758 verts[1].z = z;
1759 verts[2].x = x1;
1760 verts[2].y = y1;
1761 verts[2].z = z;
1762 verts[3].x = x0;
1763 verts[3].y = y1;
1764 verts[3].z = z;
1765
1766 /* vertex colors */
1767 for (i = 0; i < 4; i++) {
1768 verts[i].r = ctx->Color.ClearColor.f[0];
1769 verts[i].g = ctx->Color.ClearColor.f[1];
1770 verts[i].b = ctx->Color.ClearColor.f[2];
1771 verts[i].a = ctx->Color.ClearColor.f[3];
1772 }
1773
1774 /* upload new vertex data */
1775 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
1776 GL_DYNAMIC_DRAW_ARB);
1777 }
1778
1779 /* draw quad */
1780 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1781
1782 _mesa_meta_end(ctx);
1783 }
1784
1785 static void
1786 meta_glsl_clear_init(struct gl_context *ctx, struct clear_state *clear)
1787 {
1788 const char *vs_source =
1789 "attribute vec4 position;\n"
1790 "void main()\n"
1791 "{\n"
1792 " gl_Position = position;\n"
1793 "}\n";
1794 const char *fs_source =
1795 "uniform vec4 color;\n"
1796 "void main()\n"
1797 "{\n"
1798 " gl_FragColor = color;\n"
1799 "}\n";
1800 const char *vs_int_source =
1801 "#version 130\n"
1802 "attribute vec4 position;\n"
1803 "void main()\n"
1804 "{\n"
1805 " gl_Position = position;\n"
1806 "}\n";
1807 const char *fs_int_source =
1808 "#version 130\n"
1809 "uniform ivec4 color;\n"
1810 "out ivec4 out_color;\n"
1811 "\n"
1812 "void main()\n"
1813 "{\n"
1814 " out_color = color;\n"
1815 "}\n";
1816 GLuint vs, fs;
1817
1818 if (clear->ArrayObj != 0)
1819 return;
1820
1821 /* create vertex array object */
1822 _mesa_GenVertexArrays(1, &clear->ArrayObj);
1823 _mesa_BindVertexArray(clear->ArrayObj);
1824
1825 /* create vertex array buffer */
1826 _mesa_GenBuffersARB(1, &clear->VBO);
1827 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1828
1829 /* setup vertex arrays */
1830 _mesa_VertexAttribPointerARB(0, 3, GL_FLOAT, GL_FALSE, 0, (void *)0);
1831 _mesa_EnableVertexAttribArrayARB(0);
1832
1833 vs = _mesa_CreateShaderObjectARB(GL_VERTEX_SHADER);
1834 _mesa_ShaderSourceARB(vs, 1, &vs_source, NULL);
1835 _mesa_CompileShaderARB(vs);
1836
1837 fs = _mesa_CreateShaderObjectARB(GL_FRAGMENT_SHADER);
1838 _mesa_ShaderSourceARB(fs, 1, &fs_source, NULL);
1839 _mesa_CompileShaderARB(fs);
1840
1841 clear->ShaderProg = _mesa_CreateProgramObjectARB();
1842 _mesa_AttachShader(clear->ShaderProg, fs);
1843 _mesa_DeleteObjectARB(fs);
1844 _mesa_AttachShader(clear->ShaderProg, vs);
1845 _mesa_DeleteObjectARB(vs);
1846 _mesa_BindAttribLocationARB(clear->ShaderProg, 0, "position");
1847 _mesa_LinkProgramARB(clear->ShaderProg);
1848
1849 clear->ColorLocation = _mesa_GetUniformLocationARB(clear->ShaderProg,
1850 "color");
1851
1852 if (_mesa_is_desktop_gl(ctx) && ctx->Const.GLSLVersion >= 130) {
1853 vs = compile_shader_with_debug(ctx, GL_VERTEX_SHADER, vs_int_source);
1854 fs = compile_shader_with_debug(ctx, GL_FRAGMENT_SHADER, fs_int_source);
1855
1856 clear->IntegerShaderProg = _mesa_CreateProgramObjectARB();
1857 _mesa_AttachShader(clear->IntegerShaderProg, fs);
1858 _mesa_DeleteObjectARB(fs);
1859 _mesa_AttachShader(clear->IntegerShaderProg, vs);
1860 _mesa_DeleteObjectARB(vs);
1861 _mesa_BindAttribLocationARB(clear->IntegerShaderProg, 0, "position");
1862
1863 /* Note that user-defined out attributes get automatically assigned
1864 * locations starting from 0, so we don't need to explicitly
1865 * BindFragDataLocation to 0.
1866 */
1867
1868 link_program_with_debug(ctx, clear->IntegerShaderProg);
1869
1870 clear->IntegerColorLocation =
1871 _mesa_GetUniformLocationARB(clear->IntegerShaderProg, "color");
1872 }
1873 }
1874
1875 static void
1876 meta_glsl_clear_cleanup(struct gl_context *ctx, struct clear_state *clear)
1877 {
1878 if (clear->ArrayObj == 0)
1879 return;
1880 _mesa_DeleteVertexArraysAPPLE(1, &clear->ArrayObj);
1881 clear->ArrayObj = 0;
1882 _mesa_DeleteBuffersARB(1, &clear->VBO);
1883 clear->VBO = 0;
1884 _mesa_DeleteObjectARB(clear->ShaderProg);
1885 clear->ShaderProg = 0;
1886
1887 if (clear->IntegerShaderProg) {
1888 _mesa_DeleteObjectARB(clear->IntegerShaderProg);
1889 clear->IntegerShaderProg = 0;
1890 }
1891 }
1892
1893 /**
1894 * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
1895 */
1896 void
1897 _mesa_meta_glsl_Clear(struct gl_context *ctx, GLbitfield buffers)
1898 {
1899 struct clear_state *clear = &ctx->Meta->Clear;
1900 GLbitfield metaSave;
1901 const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
1902 struct gl_framebuffer *fb = ctx->DrawBuffer;
1903 const float x0 = ((float)fb->_Xmin / fb->Width) * 2.0f - 1.0f;
1904 const float y0 = ((float)fb->_Ymin / fb->Height) * 2.0f - 1.0f;
1905 const float x1 = ((float)fb->_Xmax / fb->Width) * 2.0f - 1.0f;
1906 const float y1 = ((float)fb->_Ymax / fb->Height) * 2.0f - 1.0f;
1907 const float z = -invert_z(ctx->Depth.Clear);
1908 struct vertex {
1909 GLfloat x, y, z;
1910 } verts[4];
1911
1912 metaSave = (MESA_META_ALPHA_TEST |
1913 MESA_META_BLEND |
1914 MESA_META_DEPTH_TEST |
1915 MESA_META_RASTERIZATION |
1916 MESA_META_SHADER |
1917 MESA_META_STENCIL_TEST |
1918 MESA_META_VERTEX |
1919 MESA_META_VIEWPORT |
1920 MESA_META_CLIP |
1921 MESA_META_CLAMP_FRAGMENT_COLOR |
1922 MESA_META_MULTISAMPLE);
1923
1924 if (!(buffers & BUFFER_BITS_COLOR)) {
1925 /* We'll use colormask to disable color writes. Otherwise,
1926 * respect color mask
1927 */
1928 metaSave |= MESA_META_COLOR_MASK;
1929 }
1930
1931 _mesa_meta_begin(ctx, metaSave);
1932
1933 meta_glsl_clear_init(ctx, clear);
1934
1935 if (fb->_IntegerColor) {
1936 _mesa_UseProgramObjectARB(clear->IntegerShaderProg);
1937 _mesa_Uniform4ivARB(clear->IntegerColorLocation, 1,
1938 ctx->Color.ClearColor.i);
1939 } else {
1940 _mesa_UseProgramObjectARB(clear->ShaderProg);
1941 _mesa_Uniform4fvARB(clear->ColorLocation, 1,
1942 ctx->Color.ClearColor.f);
1943 }
1944
1945 _mesa_BindVertexArray(clear->ArrayObj);
1946 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1947
1948 /* GL_COLOR_BUFFER_BIT */
1949 if (buffers & BUFFER_BITS_COLOR) {
1950 /* leave colormask, glDrawBuffer state as-is */
1951
1952 /* Clears never have the color clamped. */
1953 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
1954 }
1955 else {
1956 ASSERT(metaSave & MESA_META_COLOR_MASK);
1957 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1958 }
1959
1960 /* GL_DEPTH_BUFFER_BIT */
1961 if (buffers & BUFFER_BIT_DEPTH) {
1962 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1963 _mesa_DepthFunc(GL_ALWAYS);
1964 _mesa_DepthMask(GL_TRUE);
1965 }
1966 else {
1967 assert(!ctx->Depth.Test);
1968 }
1969
1970 /* GL_STENCIL_BUFFER_BIT */
1971 if (buffers & BUFFER_BIT_STENCIL) {
1972 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
1973 _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
1974 GL_REPLACE, GL_REPLACE, GL_REPLACE);
1975 _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
1976 ctx->Stencil.Clear & stencilMax,
1977 ctx->Stencil.WriteMask[0]);
1978 }
1979 else {
1980 assert(!ctx->Stencil.Enabled);
1981 }
1982
1983 /* vertex positions */
1984 verts[0].x = x0;
1985 verts[0].y = y0;
1986 verts[0].z = z;
1987 verts[1].x = x1;
1988 verts[1].y = y0;
1989 verts[1].z = z;
1990 verts[2].x = x1;
1991 verts[2].y = y1;
1992 verts[2].z = z;
1993 verts[3].x = x0;
1994 verts[3].y = y1;
1995 verts[3].z = z;
1996
1997 /* upload new vertex data */
1998 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
1999 GL_DYNAMIC_DRAW_ARB);
2000
2001 /* draw quad */
2002 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2003
2004 _mesa_meta_end(ctx);
2005 }
2006
2007 /**
2008 * Meta implementation of ctx->Driver.CopyPixels() in terms
2009 * of texture mapping and polygon rendering and GLSL shaders.
2010 */
2011 void
2012 _mesa_meta_CopyPixels(struct gl_context *ctx, GLint srcX, GLint srcY,
2013 GLsizei width, GLsizei height,
2014 GLint dstX, GLint dstY, GLenum type)
2015 {
2016 struct copypix_state *copypix = &ctx->Meta->CopyPix;
2017 struct temp_texture *tex = get_temp_texture(ctx);
2018 struct vertex {
2019 GLfloat x, y, z, s, t;
2020 };
2021 struct vertex verts[4];
2022 GLboolean newTex;
2023 GLenum intFormat = GL_RGBA;
2024
2025 if (type != GL_COLOR ||
2026 ctx->_ImageTransferState ||
2027 ctx->Fog.Enabled ||
2028 width > tex->MaxSize ||
2029 height > tex->MaxSize) {
2030 /* XXX avoid this fallback */
2031 _swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type);
2032 return;
2033 }
2034
2035 /* Most GL state applies to glCopyPixels, but a there's a few things
2036 * we need to override:
2037 */
2038 _mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
2039 MESA_META_SHADER |
2040 MESA_META_TEXTURE |
2041 MESA_META_TRANSFORM |
2042 MESA_META_CLIP |
2043 MESA_META_VERTEX |
2044 MESA_META_VIEWPORT));
2045
2046 if (copypix->ArrayObj == 0) {
2047 /* one-time setup */
2048
2049 /* create vertex array object */
2050 _mesa_GenVertexArrays(1, &copypix->ArrayObj);
2051 _mesa_BindVertexArray(copypix->ArrayObj);
2052
2053 /* create vertex array buffer */
2054 _mesa_GenBuffersARB(1, &copypix->VBO);
2055 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
2056 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2057 NULL, GL_DYNAMIC_DRAW_ARB);
2058
2059 /* setup vertex arrays */
2060 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2061 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
2062 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2063 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2064 }
2065 else {
2066 _mesa_BindVertexArray(copypix->ArrayObj);
2067 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
2068 }
2069
2070 newTex = alloc_texture(tex, width, height, intFormat);
2071
2072 /* vertex positions, texcoords (after texture allocation!) */
2073 {
2074 const GLfloat dstX0 = (GLfloat) dstX;
2075 const GLfloat dstY0 = (GLfloat) dstY;
2076 const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX;
2077 const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY;
2078 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
2079
2080 verts[0].x = dstX0;
2081 verts[0].y = dstY0;
2082 verts[0].z = z;
2083 verts[0].s = 0.0F;
2084 verts[0].t = 0.0F;
2085 verts[1].x = dstX1;
2086 verts[1].y = dstY0;
2087 verts[1].z = z;
2088 verts[1].s = tex->Sright;
2089 verts[1].t = 0.0F;
2090 verts[2].x = dstX1;
2091 verts[2].y = dstY1;
2092 verts[2].z = z;
2093 verts[2].s = tex->Sright;
2094 verts[2].t = tex->Ttop;
2095 verts[3].x = dstX0;
2096 verts[3].y = dstY1;
2097 verts[3].z = z;
2098 verts[3].s = 0.0F;
2099 verts[3].t = tex->Ttop;
2100
2101 /* upload new vertex data */
2102 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
2103 }
2104
2105 /* Alloc/setup texture */
2106 setup_copypix_texture(tex, newTex, srcX, srcY, width, height,
2107 GL_RGBA, GL_NEAREST);
2108
2109 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
2110
2111 /* draw textured quad */
2112 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2113
2114 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
2115
2116 _mesa_meta_end(ctx);
2117 }
2118
2119
2120
2121 /**
2122 * When the glDrawPixels() image size is greater than the max rectangle
2123 * texture size we use this function to break the glDrawPixels() image
2124 * into tiles which fit into the max texture size.
2125 */
2126 static void
2127 tiled_draw_pixels(struct gl_context *ctx,
2128 GLint tileSize,
2129 GLint x, GLint y, GLsizei width, GLsizei height,
2130 GLenum format, GLenum type,
2131 const struct gl_pixelstore_attrib *unpack,
2132 const GLvoid *pixels)
2133 {
2134 struct gl_pixelstore_attrib tileUnpack = *unpack;
2135 GLint i, j;
2136
2137 if (tileUnpack.RowLength == 0)
2138 tileUnpack.RowLength = width;
2139
2140 for (i = 0; i < width; i += tileSize) {
2141 const GLint tileWidth = MIN2(tileSize, width - i);
2142 const GLint tileX = (GLint) (x + i * ctx->Pixel.ZoomX);
2143
2144 tileUnpack.SkipPixels = unpack->SkipPixels + i;
2145
2146 for (j = 0; j < height; j += tileSize) {
2147 const GLint tileHeight = MIN2(tileSize, height - j);
2148 const GLint tileY = (GLint) (y + j * ctx->Pixel.ZoomY);
2149
2150 tileUnpack.SkipRows = unpack->SkipRows + j;
2151
2152 _mesa_meta_DrawPixels(ctx, tileX, tileY, tileWidth, tileHeight,
2153 format, type, &tileUnpack, pixels);
2154 }
2155 }
2156 }
2157
2158
2159 /**
2160 * One-time init for drawing stencil pixels.
2161 */
2162 static void
2163 init_draw_stencil_pixels(struct gl_context *ctx)
2164 {
2165 /* This program is run eight times, once for each stencil bit.
2166 * The stencil values to draw are found in an 8-bit alpha texture.
2167 * We read the texture/stencil value and test if bit 'b' is set.
2168 * If the bit is not set, use KIL to kill the fragment.
2169 * Finally, we use the stencil test to update the stencil buffer.
2170 *
2171 * The basic algorithm for checking if a bit is set is:
2172 * if (is_odd(value / (1 << bit)))
2173 * result is one (or non-zero).
2174 * else
2175 * result is zero.
2176 * The program parameter contains three values:
2177 * parm.x = 255 / (1 << bit)
2178 * parm.y = 0.5
2179 * parm.z = 0.0
2180 */
2181 static const char *program =
2182 "!!ARBfp1.0\n"
2183 "PARAM parm = program.local[0]; \n"
2184 "TEMP t; \n"
2185 "TEX t, fragment.texcoord[0], texture[0], %s; \n" /* NOTE %s here! */
2186 "# t = t * 255 / bit \n"
2187 "MUL t.x, t.a, parm.x; \n"
2188 "# t = (int) t \n"
2189 "FRC t.y, t.x; \n"
2190 "SUB t.x, t.x, t.y; \n"
2191 "# t = t * 0.5 \n"
2192 "MUL t.x, t.x, parm.y; \n"
2193 "# t = fract(t.x) \n"
2194 "FRC t.x, t.x; # if t.x != 0, then the bit is set \n"
2195 "# t.x = (t.x == 0 ? 1 : 0) \n"
2196 "SGE t.x, -t.x, parm.z; \n"
2197 "KIL -t.x; \n"
2198 "# for debug only \n"
2199 "#MOV result.color, t.x; \n"
2200 "END \n";
2201 char program2[1000];
2202 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
2203 struct temp_texture *tex = get_temp_texture(ctx);
2204 const char *texTarget;
2205
2206 assert(drawpix->StencilFP == 0);
2207
2208 /* replace %s with "RECT" or "2D" */
2209 assert(strlen(program) + 4 < sizeof(program2));
2210 if (tex->Target == GL_TEXTURE_RECTANGLE)
2211 texTarget = "RECT";
2212 else
2213 texTarget = "2D";
2214 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
2215
2216 _mesa_GenPrograms(1, &drawpix->StencilFP);
2217 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
2218 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
2219 strlen(program2), (const GLubyte *) program2);
2220 }
2221
2222
2223 /**
2224 * One-time init for drawing depth pixels.
2225 */
2226 static void
2227 init_draw_depth_pixels(struct gl_context *ctx)
2228 {
2229 static const char *program =
2230 "!!ARBfp1.0\n"
2231 "PARAM color = program.local[0]; \n"
2232 "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
2233 "MOV result.color, color; \n"
2234 "END \n";
2235 char program2[200];
2236 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
2237 struct temp_texture *tex = get_temp_texture(ctx);
2238 const char *texTarget;
2239
2240 assert(drawpix->DepthFP == 0);
2241
2242 /* replace %s with "RECT" or "2D" */
2243 assert(strlen(program) + 4 < sizeof(program2));
2244 if (tex->Target == GL_TEXTURE_RECTANGLE)
2245 texTarget = "RECT";
2246 else
2247 texTarget = "2D";
2248 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
2249
2250 _mesa_GenPrograms(1, &drawpix->DepthFP);
2251 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
2252 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
2253 strlen(program2), (const GLubyte *) program2);
2254 }
2255
2256
2257 /**
2258 * Meta implementation of ctx->Driver.DrawPixels() in terms
2259 * of texture mapping and polygon rendering.
2260 */
2261 void
2262 _mesa_meta_DrawPixels(struct gl_context *ctx,
2263 GLint x, GLint y, GLsizei width, GLsizei height,
2264 GLenum format, GLenum type,
2265 const struct gl_pixelstore_attrib *unpack,
2266 const GLvoid *pixels)
2267 {
2268 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
2269 struct temp_texture *tex = get_temp_texture(ctx);
2270 const struct gl_pixelstore_attrib unpackSave = ctx->Unpack;
2271 const GLuint origStencilMask = ctx->Stencil.WriteMask[0];
2272 struct vertex {
2273 GLfloat x, y, z, s, t;
2274 };
2275 struct vertex verts[4];
2276 GLenum texIntFormat;
2277 GLboolean fallback, newTex;
2278 GLbitfield metaExtraSave = 0x0;
2279 GLuint vbo;
2280
2281 /*
2282 * Determine if we can do the glDrawPixels with texture mapping.
2283 */
2284 fallback = GL_FALSE;
2285 if (ctx->Fog.Enabled) {
2286 fallback = GL_TRUE;
2287 }
2288
2289 if (_mesa_is_color_format(format)) {
2290 /* use more compact format when possible */
2291 /* XXX disable special case for GL_LUMINANCE for now to work around
2292 * apparent i965 driver bug (see bug #23670).
2293 */
2294 if (/*format == GL_LUMINANCE ||*/ format == GL_LUMINANCE_ALPHA)
2295 texIntFormat = format;
2296 else
2297 texIntFormat = GL_RGBA;
2298
2299 /* If we're not supposed to clamp the resulting color, then just
2300 * promote our texture to fully float. We could do better by
2301 * just going for the matching set of channels, in floating
2302 * point.
2303 */
2304 if (ctx->Color.ClampFragmentColor != GL_TRUE &&
2305 ctx->Extensions.ARB_texture_float)
2306 texIntFormat = GL_RGBA32F;
2307 }
2308 else if (_mesa_is_stencil_format(format)) {
2309 if (ctx->Extensions.ARB_fragment_program &&
2310 ctx->Pixel.IndexShift == 0 &&
2311 ctx->Pixel.IndexOffset == 0 &&
2312 type == GL_UNSIGNED_BYTE) {
2313 /* We'll store stencil as alpha. This only works for GLubyte
2314 * image data because of how incoming values are mapped to alpha
2315 * in [0,1].
2316 */
2317 texIntFormat = GL_ALPHA;
2318 metaExtraSave = (MESA_META_COLOR_MASK |
2319 MESA_META_DEPTH_TEST |
2320 MESA_META_PIXEL_TRANSFER |
2321 MESA_META_SHADER |
2322 MESA_META_STENCIL_TEST);
2323 }
2324 else {
2325 fallback = GL_TRUE;
2326 }
2327 }
2328 else if (_mesa_is_depth_format(format)) {
2329 if (ctx->Extensions.ARB_depth_texture &&
2330 ctx->Extensions.ARB_fragment_program) {
2331 texIntFormat = GL_DEPTH_COMPONENT;
2332 metaExtraSave = (MESA_META_SHADER);
2333 }
2334 else {
2335 fallback = GL_TRUE;
2336 }
2337 }
2338 else {
2339 fallback = GL_TRUE;
2340 }
2341
2342 if (fallback) {
2343 _swrast_DrawPixels(ctx, x, y, width, height,
2344 format, type, unpack, pixels);
2345 return;
2346 }
2347
2348 /*
2349 * Check image size against max texture size, draw as tiles if needed.
2350 */
2351 if (width > tex->MaxSize || height > tex->MaxSize) {
2352 tiled_draw_pixels(ctx, tex->MaxSize, x, y, width, height,
2353 format, type, unpack, pixels);
2354 return;
2355 }
2356
2357 /* Most GL state applies to glDrawPixels (like blending, stencil, etc),
2358 * but a there's a few things we need to override:
2359 */
2360 _mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
2361 MESA_META_SHADER |
2362 MESA_META_TEXTURE |
2363 MESA_META_TRANSFORM |
2364 MESA_META_CLIP |
2365 MESA_META_VERTEX |
2366 MESA_META_VIEWPORT |
2367 metaExtraSave));
2368
2369 newTex = alloc_texture(tex, width, height, texIntFormat);
2370
2371 /* vertex positions, texcoords (after texture allocation!) */
2372 {
2373 const GLfloat x0 = (GLfloat) x;
2374 const GLfloat y0 = (GLfloat) y;
2375 const GLfloat x1 = x + width * ctx->Pixel.ZoomX;
2376 const GLfloat y1 = y + height * ctx->Pixel.ZoomY;
2377 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
2378
2379 verts[0].x = x0;
2380 verts[0].y = y0;
2381 verts[0].z = z;
2382 verts[0].s = 0.0F;
2383 verts[0].t = 0.0F;
2384 verts[1].x = x1;
2385 verts[1].y = y0;
2386 verts[1].z = z;
2387 verts[1].s = tex->Sright;
2388 verts[1].t = 0.0F;
2389 verts[2].x = x1;
2390 verts[2].y = y1;
2391 verts[2].z = z;
2392 verts[2].s = tex->Sright;
2393 verts[2].t = tex->Ttop;
2394 verts[3].x = x0;
2395 verts[3].y = y1;
2396 verts[3].z = z;
2397 verts[3].s = 0.0F;
2398 verts[3].t = tex->Ttop;
2399 }
2400
2401 if (drawpix->ArrayObj == 0) {
2402 /* one-time setup: create vertex array object */
2403 _mesa_GenVertexArrays(1, &drawpix->ArrayObj);
2404 }
2405 _mesa_BindVertexArray(drawpix->ArrayObj);
2406
2407 /* create vertex array buffer */
2408 _mesa_GenBuffersARB(1, &vbo);
2409 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
2410 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2411 verts, GL_DYNAMIC_DRAW_ARB);
2412
2413 /* setup vertex arrays */
2414 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2415 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
2416 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2417 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2418
2419 /* set given unpack params */
2420 ctx->Unpack = *unpack;
2421
2422 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
2423
2424 if (_mesa_is_stencil_format(format)) {
2425 /* Drawing stencil */
2426 GLint bit;
2427
2428 if (!drawpix->StencilFP)
2429 init_draw_stencil_pixels(ctx);
2430
2431 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
2432 GL_ALPHA, type, pixels);
2433
2434 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
2435
2436 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
2437
2438 /* set all stencil bits to 0 */
2439 _mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
2440 _mesa_StencilFunc(GL_ALWAYS, 0, 255);
2441 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2442
2443 /* set stencil bits to 1 where needed */
2444 _mesa_StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
2445
2446 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
2447 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
2448
2449 for (bit = 0; bit < ctx->DrawBuffer->Visual.stencilBits; bit++) {
2450 const GLuint mask = 1 << bit;
2451 if (mask & origStencilMask) {
2452 _mesa_StencilFunc(GL_ALWAYS, mask, mask);
2453 _mesa_StencilMask(mask);
2454
2455 _mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,
2456 255.0 / mask, 0.5, 0.0, 0.0);
2457
2458 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2459 }
2460 }
2461 }
2462 else if (_mesa_is_depth_format(format)) {
2463 /* Drawing depth */
2464 if (!drawpix->DepthFP)
2465 init_draw_depth_pixels(ctx);
2466
2467 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
2468 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
2469
2470 /* polygon color = current raster color */
2471 _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
2472 ctx->Current.RasterColor);
2473
2474 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
2475 format, type, pixels);
2476
2477 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2478 }
2479 else {
2480 /* Drawing RGBA */
2481 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
2482 format, type, pixels);
2483 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2484 }
2485
2486 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
2487
2488 _mesa_DeleteBuffersARB(1, &vbo);
2489
2490 /* restore unpack params */
2491 ctx->Unpack = unpackSave;
2492
2493 _mesa_meta_end(ctx);
2494 }
2495
2496 static GLboolean
2497 alpha_test_raster_color(struct gl_context *ctx)
2498 {
2499 GLfloat alpha = ctx->Current.RasterColor[ACOMP];
2500 GLfloat ref = ctx->Color.AlphaRef;
2501
2502 switch (ctx->Color.AlphaFunc) {
2503 case GL_NEVER:
2504 return GL_FALSE;
2505 case GL_LESS:
2506 return alpha < ref;
2507 case GL_EQUAL:
2508 return alpha == ref;
2509 case GL_LEQUAL:
2510 return alpha <= ref;
2511 case GL_GREATER:
2512 return alpha > ref;
2513 case GL_NOTEQUAL:
2514 return alpha != ref;
2515 case GL_GEQUAL:
2516 return alpha >= ref;
2517 case GL_ALWAYS:
2518 return GL_TRUE;
2519 default:
2520 assert(0);
2521 return GL_FALSE;
2522 }
2523 }
2524
2525 /**
2526 * Do glBitmap with a alpha texture quad. Use the alpha test to cull
2527 * the 'off' bits. A bitmap cache as in the gallium/mesa state
2528 * tracker would improve performance a lot.
2529 */
2530 void
2531 _mesa_meta_Bitmap(struct gl_context *ctx,
2532 GLint x, GLint y, GLsizei width, GLsizei height,
2533 const struct gl_pixelstore_attrib *unpack,
2534 const GLubyte *bitmap1)
2535 {
2536 struct bitmap_state *bitmap = &ctx->Meta->Bitmap;
2537 struct temp_texture *tex = get_bitmap_temp_texture(ctx);
2538 const GLenum texIntFormat = GL_ALPHA;
2539 const struct gl_pixelstore_attrib unpackSave = *unpack;
2540 GLubyte fg, bg;
2541 struct vertex {
2542 GLfloat x, y, z, s, t, r, g, b, a;
2543 };
2544 struct vertex verts[4];
2545 GLboolean newTex;
2546 GLubyte *bitmap8;
2547
2548 /*
2549 * Check if swrast fallback is needed.
2550 */
2551 if (ctx->_ImageTransferState ||
2552 ctx->FragmentProgram._Enabled ||
2553 ctx->Fog.Enabled ||
2554 ctx->Texture._EnabledUnits ||
2555 width > tex->MaxSize ||
2556 height > tex->MaxSize) {
2557 _swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1);
2558 return;
2559 }
2560
2561 if (ctx->Color.AlphaEnabled && !alpha_test_raster_color(ctx))
2562 return;
2563
2564 /* Most GL state applies to glBitmap (like blending, stencil, etc),
2565 * but a there's a few things we need to override:
2566 */
2567 _mesa_meta_begin(ctx, (MESA_META_ALPHA_TEST |
2568 MESA_META_PIXEL_STORE |
2569 MESA_META_RASTERIZATION |
2570 MESA_META_SHADER |
2571 MESA_META_TEXTURE |
2572 MESA_META_TRANSFORM |
2573 MESA_META_CLIP |
2574 MESA_META_VERTEX |
2575 MESA_META_VIEWPORT));
2576
2577 if (bitmap->ArrayObj == 0) {
2578 /* one-time setup */
2579
2580 /* create vertex array object */
2581 _mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj);
2582 _mesa_BindVertexArrayAPPLE(bitmap->ArrayObj);
2583
2584 /* create vertex array buffer */
2585 _mesa_GenBuffersARB(1, &bitmap->VBO);
2586 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
2587 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2588 NULL, GL_DYNAMIC_DRAW_ARB);
2589
2590 /* setup vertex arrays */
2591 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2592 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
2593 _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
2594 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2595 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2596 _mesa_EnableClientState(GL_COLOR_ARRAY);
2597 }
2598 else {
2599 _mesa_BindVertexArray(bitmap->ArrayObj);
2600 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
2601 }
2602
2603 newTex = alloc_texture(tex, width, height, texIntFormat);
2604
2605 /* vertex positions, texcoords, colors (after texture allocation!) */
2606 {
2607 const GLfloat x0 = (GLfloat) x;
2608 const GLfloat y0 = (GLfloat) y;
2609 const GLfloat x1 = (GLfloat) (x + width);
2610 const GLfloat y1 = (GLfloat) (y + height);
2611 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
2612 GLuint i;
2613
2614 verts[0].x = x0;
2615 verts[0].y = y0;
2616 verts[0].z = z;
2617 verts[0].s = 0.0F;
2618 verts[0].t = 0.0F;
2619 verts[1].x = x1;
2620 verts[1].y = y0;
2621 verts[1].z = z;
2622 verts[1].s = tex->Sright;
2623 verts[1].t = 0.0F;
2624 verts[2].x = x1;
2625 verts[2].y = y1;
2626 verts[2].z = z;
2627 verts[2].s = tex->Sright;
2628 verts[2].t = tex->Ttop;
2629 verts[3].x = x0;
2630 verts[3].y = y1;
2631 verts[3].z = z;
2632 verts[3].s = 0.0F;
2633 verts[3].t = tex->Ttop;
2634
2635 for (i = 0; i < 4; i++) {
2636 verts[i].r = ctx->Current.RasterColor[0];
2637 verts[i].g = ctx->Current.RasterColor[1];
2638 verts[i].b = ctx->Current.RasterColor[2];
2639 verts[i].a = ctx->Current.RasterColor[3];
2640 }
2641
2642 /* upload new vertex data */
2643 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
2644 }
2645
2646 /* choose different foreground/background alpha values */
2647 CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]);
2648 bg = (fg > 127 ? 0 : 255);
2649
2650 bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1);
2651 if (!bitmap1) {
2652 _mesa_meta_end(ctx);
2653 return;
2654 }
2655
2656 bitmap8 = (GLubyte *) malloc(width * height);
2657 if (bitmap8) {
2658 memset(bitmap8, bg, width * height);
2659 _mesa_expand_bitmap(width, height, &unpackSave, bitmap1,
2660 bitmap8, width, fg);
2661
2662 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
2663
2664 _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE);
2665 _mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg));
2666
2667 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
2668 GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8);
2669
2670 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2671
2672 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
2673
2674 free(bitmap8);
2675 }
2676
2677 _mesa_unmap_pbo_source(ctx, &unpackSave);
2678
2679 _mesa_meta_end(ctx);
2680 }
2681
2682
2683 /**
2684 * Check if the call to _mesa_meta_GenerateMipmap() will require a
2685 * software fallback. The fallback path will require that the texture
2686 * images are mapped.
2687 * \return GL_TRUE if a fallback is needed, GL_FALSE otherwise
2688 */
2689 GLboolean
2690 _mesa_meta_check_generate_mipmap_fallback(struct gl_context *ctx, GLenum target,
2691 struct gl_texture_object *texObj)
2692 {
2693 const GLuint fboSave = ctx->DrawBuffer->Name;
2694 struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
2695 struct gl_texture_image *baseImage;
2696 GLuint srcLevel;
2697 GLenum status;
2698
2699 /* check for fallbacks */
2700 if (!ctx->Extensions.EXT_framebuffer_object ||
2701 target == GL_TEXTURE_3D ||
2702 target == GL_TEXTURE_1D_ARRAY ||
2703 target == GL_TEXTURE_2D_ARRAY) {
2704 return GL_TRUE;
2705 }
2706
2707 srcLevel = texObj->BaseLevel;
2708 baseImage = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
2709 if (!baseImage || _mesa_is_format_compressed(baseImage->TexFormat)) {
2710 return GL_TRUE;
2711 }
2712
2713 if (_mesa_get_format_color_encoding(baseImage->TexFormat) == GL_SRGB &&
2714 !ctx->Extensions.EXT_texture_sRGB_decode) {
2715 /* The texture format is sRGB but we can't turn off sRGB->linear
2716 * texture sample conversion. So we won't be able to generate the
2717 * right colors when rendering. Need to use a fallback.
2718 */
2719 return GL_TRUE;
2720 }
2721
2722 /*
2723 * Test that we can actually render in the texture's format.
2724 */
2725 if (!mipmap->FBO)
2726 _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
2727 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
2728
2729 if (target == GL_TEXTURE_1D) {
2730 _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
2731 GL_COLOR_ATTACHMENT0_EXT,
2732 target, texObj->Name, srcLevel);
2733 }
2734 #if 0
2735 /* other work is needed to enable 3D mipmap generation */
2736 else if (target == GL_TEXTURE_3D) {
2737 GLint zoffset = 0;
2738 _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
2739 GL_COLOR_ATTACHMENT0_EXT,
2740 target, texObj->Name, srcLevel, zoffset);
2741 }
2742 #endif
2743 else {
2744 /* 2D / cube */
2745 _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
2746 GL_COLOR_ATTACHMENT0_EXT,
2747 target, texObj->Name, srcLevel);
2748 }
2749
2750 status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
2751
2752 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
2753
2754 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2755 return GL_TRUE;
2756 }
2757
2758 return GL_FALSE;
2759 }
2760
2761
2762 /**
2763 * Compute the texture coordinates for the four vertices of a quad for
2764 * drawing a 2D texture image or slice of a cube/3D texture.
2765 * \param faceTarget GL_TEXTURE_1D/2D/3D or cube face name
2766 * \param slice slice of a 1D/2D array texture or 3D texture
2767 * \param width width of the texture image
2768 * \param height height of the texture image
2769 * \param coords0/1/2/3 returns the computed texcoords
2770 */
2771 static void
2772 setup_texture_coords(GLenum faceTarget,
2773 GLint slice,
2774 GLint width,
2775 GLint height,
2776 GLfloat coords0[3],
2777 GLfloat coords1[3],
2778 GLfloat coords2[3],
2779 GLfloat coords3[3])
2780 {
2781 static const GLfloat st[4][2] = {
2782 {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
2783 };
2784 GLuint i;
2785 GLfloat r;
2786
2787 switch (faceTarget) {
2788 case GL_TEXTURE_1D:
2789 case GL_TEXTURE_2D:
2790 case GL_TEXTURE_3D:
2791 case GL_TEXTURE_2D_ARRAY:
2792 if (faceTarget == GL_TEXTURE_3D)
2793 r = 1.0F / slice;
2794 else if (faceTarget == GL_TEXTURE_2D_ARRAY)
2795 r = slice;
2796 else
2797 r = 0.0F;
2798 coords0[0] = 0.0F; /* s */
2799 coords0[1] = 0.0F; /* t */
2800 coords0[2] = r; /* r */
2801 coords1[0] = 1.0F;
2802 coords1[1] = 0.0F;
2803 coords1[2] = r;
2804 coords2[0] = 1.0F;
2805 coords2[1] = 1.0F;
2806 coords2[2] = r;
2807 coords3[0] = 0.0F;
2808 coords3[1] = 1.0F;
2809 coords3[2] = r;
2810 break;
2811 case GL_TEXTURE_RECTANGLE_ARB:
2812 coords0[0] = 0.0F; /* s */
2813 coords0[1] = 0.0F; /* t */
2814 coords0[2] = 0.0F; /* r */
2815 coords1[0] = width;
2816 coords1[1] = 0.0F;
2817 coords1[2] = 0.0F;
2818 coords2[0] = width;
2819 coords2[1] = height;
2820 coords2[2] = 0.0F;
2821 coords3[0] = 0.0F;
2822 coords3[1] = height;
2823 coords3[2] = 0.0F;
2824 break;
2825 case GL_TEXTURE_1D_ARRAY:
2826 coords0[0] = 0.0F; /* s */
2827 coords0[1] = slice; /* t */
2828 coords0[2] = 0.0F; /* r */
2829 coords1[0] = 1.0f;
2830 coords1[1] = slice;
2831 coords1[2] = 0.0F;
2832 coords2[0] = 1.0F;
2833 coords2[1] = slice;
2834 coords2[2] = 0.0F;
2835 coords3[0] = 0.0F;
2836 coords3[1] = slice;
2837 coords3[2] = 0.0F;
2838 break;
2839
2840 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
2841 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
2842 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
2843 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
2844 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
2845 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
2846 /* loop over quad verts */
2847 for (i = 0; i < 4; i++) {
2848 /* Compute sc = +/-scale and tc = +/-scale.
2849 * Not +/-1 to avoid cube face selection ambiguity near the edges,
2850 * though that can still sometimes happen with this scale factor...
2851 */
2852 const GLfloat scale = 0.9999f;
2853 const GLfloat sc = (2.0f * st[i][0] - 1.0f) * scale;
2854 const GLfloat tc = (2.0f * st[i][1] - 1.0f) * scale;
2855 GLfloat *coord;
2856
2857 switch (i) {
2858 case 0:
2859 coord = coords0;
2860 break;
2861 case 1:
2862 coord = coords1;
2863 break;
2864 case 2:
2865 coord = coords2;
2866 break;
2867 case 3:
2868 coord = coords3;
2869 break;
2870 default:
2871 assert(0);
2872 }
2873
2874 switch (faceTarget) {
2875 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
2876 coord[0] = 1.0f;
2877 coord[1] = -tc;
2878 coord[2] = -sc;
2879 break;
2880 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
2881 coord[0] = -1.0f;
2882 coord[1] = -tc;
2883 coord[2] = sc;
2884 break;
2885 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
2886 coord[0] = sc;
2887 coord[1] = 1.0f;
2888 coord[2] = tc;
2889 break;
2890 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
2891 coord[0] = sc;
2892 coord[1] = -1.0f;
2893 coord[2] = -tc;
2894 break;
2895 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
2896 coord[0] = sc;
2897 coord[1] = -tc;
2898 coord[2] = 1.0f;
2899 break;
2900 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
2901 coord[0] = -sc;
2902 coord[1] = -tc;
2903 coord[2] = -1.0f;
2904 break;
2905 default:
2906 assert(0);
2907 }
2908 }
2909 break;
2910 default:
2911 assert(0 && "unexpected target in meta setup_texture_coords()");
2912 }
2913 }
2914
2915
2916 /**
2917 * Called via ctx->Driver.GenerateMipmap()
2918 * Note: We don't yet support 3D textures, 1D/2D array textures or texture
2919 * borders.
2920 */
2921 void
2922 _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
2923 struct gl_texture_object *texObj)
2924 {
2925 struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
2926 struct vertex {
2927 GLfloat x, y, tex[3];
2928 };
2929 struct vertex verts[4];
2930 const GLuint baseLevel = texObj->BaseLevel;
2931 const GLuint maxLevel = texObj->MaxLevel;
2932 const GLint maxLevelSave = texObj->MaxLevel;
2933 const GLboolean genMipmapSave = texObj->GenerateMipmap;
2934 const GLenum srgbBufferSave = ctx->Color.sRGBEnabled;
2935 const GLuint fboSave = ctx->DrawBuffer->Name;
2936 const GLuint original_active_unit = ctx->Texture.CurrentUnit;
2937 GLenum faceTarget;
2938 GLuint dstLevel;
2939 const GLuint border = 0;
2940 const GLint slice = 0;
2941 GLuint samplerSave;
2942
2943 if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
2944 _mesa_generate_mipmap(ctx, target, texObj);
2945 return;
2946 }
2947
2948 if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
2949 target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
2950 faceTarget = target;
2951 target = GL_TEXTURE_CUBE_MAP;
2952 }
2953 else {
2954 faceTarget = target;
2955 }
2956
2957 _mesa_meta_begin(ctx, MESA_META_ALL);
2958
2959 samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
2960 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
2961
2962 if (original_active_unit != 0)
2963 _mesa_BindTexture(target, texObj->Name);
2964
2965 if (mipmap->ArrayObj == 0) {
2966 /* one-time setup */
2967
2968 /* create vertex array object */
2969 _mesa_GenVertexArraysAPPLE(1, &mipmap->ArrayObj);
2970 _mesa_BindVertexArrayAPPLE(mipmap->ArrayObj);
2971
2972 /* create vertex array buffer */
2973 _mesa_GenBuffersARB(1, &mipmap->VBO);
2974 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
2975 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2976 NULL, GL_DYNAMIC_DRAW_ARB);
2977
2978 /* setup vertex arrays */
2979 _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2980 _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(tex));
2981 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2982 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2983 }
2984 else {
2985 _mesa_BindVertexArray(mipmap->ArrayObj);
2986 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
2987 }
2988
2989 if (!mipmap->FBO) {
2990 _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
2991 }
2992
2993 if (!mipmap->Sampler) {
2994 _mesa_GenSamplers(1, &mipmap->Sampler);
2995 _mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
2996 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
2997 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2998 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2999 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
3000 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
3001 /* We don't want to encode or decode sRGB values; treat them as linear */
3002 if (ctx->Extensions.EXT_texture_sRGB_decode) {
3003 _mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_SRGB_DECODE_EXT,
3004 GL_SKIP_DECODE_EXT);
3005 }
3006
3007 } else {
3008 _mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
3009 }
3010
3011 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
3012
3013 _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
3014
3015 if (ctx->Extensions.EXT_framebuffer_sRGB) {
3016 _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
3017 }
3018
3019 _mesa_set_enable(ctx, target, GL_TRUE);
3020
3021 /* setup texcoords (XXX what about border?) */
3022 setup_texture_coords(faceTarget,
3023 slice,
3024 0, 0, /* width, height never used here */
3025 verts[0].tex,
3026 verts[1].tex,
3027 verts[2].tex,
3028 verts[3].tex);
3029
3030 /* setup vertex positions */
3031 verts[0].x = 0.0F;
3032 verts[0].y = 0.0F;
3033 verts[1].x = 1.0F;
3034 verts[1].y = 0.0F;
3035 verts[2].x = 1.0F;
3036 verts[2].y = 1.0F;
3037 verts[3].x = 0.0F;
3038 verts[3].y = 1.0F;
3039
3040 /* upload new vertex data */
3041 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
3042
3043 /* setup projection matrix */
3044 _mesa_MatrixMode(GL_PROJECTION);
3045 _mesa_LoadIdentity();
3046 _mesa_Ortho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
3047
3048 /* texture is already locked, unlock now */
3049 _mesa_unlock_texture(ctx, texObj);
3050
3051 for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
3052 const struct gl_texture_image *srcImage;
3053 const GLuint srcLevel = dstLevel - 1;
3054 GLsizei srcWidth, srcHeight, srcDepth;
3055 GLsizei dstWidth, dstHeight, dstDepth;
3056 GLenum status;
3057
3058 srcImage = _mesa_select_tex_image(ctx, texObj, faceTarget, srcLevel);
3059 assert(srcImage->Border == 0); /* XXX we can fix this */
3060
3061 /* src size w/out border */
3062 srcWidth = srcImage->Width - 2 * border;
3063 srcHeight = srcImage->Height - 2 * border;
3064 srcDepth = srcImage->Depth - 2 * border;
3065
3066 /* new dst size w/ border */
3067 dstWidth = MAX2(1, srcWidth / 2) + 2 * border;
3068 dstHeight = MAX2(1, srcHeight / 2) + 2 * border;
3069 dstDepth = MAX2(1, srcDepth / 2) + 2 * border;
3070
3071 if (dstWidth == srcImage->Width &&
3072 dstHeight == srcImage->Height &&
3073 dstDepth == srcImage->Depth) {
3074 /* all done */
3075 break;
3076 }
3077
3078 /* Allocate storage for the destination mipmap image(s) */
3079
3080 /* Set MaxLevel large enough to hold the new level when we allocate it */
3081 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
3082
3083 if (!_mesa_prepare_mipmap_level(ctx, texObj, dstLevel,
3084 dstWidth, dstHeight, dstDepth,
3085 srcImage->Border,
3086 srcImage->InternalFormat,
3087 srcImage->TexFormat)) {
3088 /* All done. We either ran out of memory or we would go beyond the
3089 * last valid level of an immutable texture if we continued.
3090 */
3091 break;
3092 }
3093
3094 /* limit minification to src level */
3095 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
3096
3097 /* Set to draw into the current dstLevel */
3098 if (target == GL_TEXTURE_1D) {
3099 _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
3100 GL_COLOR_ATTACHMENT0_EXT,
3101 target,
3102 texObj->Name,
3103 dstLevel);
3104 }
3105 else if (target == GL_TEXTURE_3D) {
3106 GLint zoffset = 0; /* XXX unfinished */
3107 _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
3108 GL_COLOR_ATTACHMENT0_EXT,
3109 target,
3110 texObj->Name,
3111 dstLevel, zoffset);
3112 }
3113 else {
3114 /* 2D / cube */
3115 _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
3116 GL_COLOR_ATTACHMENT0_EXT,
3117 faceTarget,
3118 texObj->Name,
3119 dstLevel);
3120 }
3121
3122 _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
3123
3124 /* sanity check */
3125 status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
3126 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
3127 _mesa_problem(ctx, "Unexpected incomplete framebuffer in "
3128 "_mesa_meta_GenerateMipmap()");
3129 break;
3130 }
3131
3132 assert(dstWidth == ctx->DrawBuffer->Width);
3133 assert(dstHeight == ctx->DrawBuffer->Height);
3134
3135 /* setup viewport */
3136 _mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);
3137
3138 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
3139 }
3140
3141 if (ctx->Extensions.EXT_framebuffer_sRGB && srgbBufferSave) {
3142 _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_TRUE);
3143 }
3144
3145 _mesa_lock_texture(ctx, texObj); /* relock */
3146
3147 _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
3148
3149 _mesa_meta_end(ctx);
3150
3151 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
3152 _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
3153
3154 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
3155 }
3156
3157
3158 /**
3159 * Determine the GL data type to use for the temporary image read with
3160 * ReadPixels() and passed to Tex[Sub]Image().
3161 */
3162 static GLenum
3163 get_temp_image_type(struct gl_context *ctx, gl_format format)
3164 {
3165 GLenum baseFormat;
3166
3167 baseFormat = _mesa_get_format_base_format(format);
3168
3169 switch (baseFormat) {
3170 case GL_RGBA:
3171 case GL_RGB:
3172 case GL_RG:
3173 case GL_RED:
3174 case GL_ALPHA:
3175 case GL_LUMINANCE:
3176 case GL_LUMINANCE_ALPHA:
3177 case GL_INTENSITY:
3178 if (ctx->DrawBuffer->Visual.redBits <= 8)
3179 return GL_UNSIGNED_BYTE;
3180 else if (ctx->DrawBuffer->Visual.redBits <= 16)
3181 return GL_UNSIGNED_SHORT;
3182 else
3183 return _mesa_get_format_datatype(format);
3184 case GL_DEPTH_COMPONENT:
3185 return GL_UNSIGNED_INT;
3186 case GL_DEPTH_STENCIL:
3187 return GL_UNSIGNED_INT_24_8;
3188 default:
3189 _mesa_problem(ctx, "Unexpected format %d in get_temp_image_type()",
3190 baseFormat);
3191 return 0;
3192 }
3193 }
3194
3195
3196 /**
3197 * Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions.
3198 * Have to be careful with locking and meta state for pixel transfer.
3199 */
3200 void
3201 _mesa_meta_CopyTexSubImage(struct gl_context *ctx, GLuint dims,
3202 struct gl_texture_image *texImage,
3203 GLint xoffset, GLint yoffset, GLint zoffset,
3204 struct gl_renderbuffer *rb,
3205 GLint x, GLint y,
3206 GLsizei width, GLsizei height)
3207 {
3208 struct gl_texture_object *texObj = texImage->TexObject;
3209 GLenum format, type;
3210 GLint bpp;
3211 void *buf;
3212
3213 /* Choose format/type for temporary image buffer */
3214 format = _mesa_get_format_base_format(texImage->TexFormat);
3215 if (format == GL_LUMINANCE ||
3216 format == GL_LUMINANCE_ALPHA ||
3217 format == GL_INTENSITY) {
3218 /* We don't want to use GL_LUMINANCE, GL_INTENSITY, etc. for the
3219 * temp image buffer because glReadPixels will do L=R+G+B which is
3220 * not what we want (should be L=R).
3221 */
3222 format = GL_RGBA;
3223 }
3224
3225 type = get_temp_image_type(ctx, texImage->TexFormat);
3226 if (_mesa_is_format_integer_color(texImage->TexFormat)) {
3227 format = _mesa_base_format_to_integer_format(format);
3228 }
3229 bpp = _mesa_bytes_per_pixel(format, type);
3230 if (bpp <= 0) {
3231 _mesa_problem(ctx, "Bad bpp in _mesa_meta_CopyTexSubImage()");
3232 return;
3233 }
3234
3235 /*
3236 * Alloc image buffer (XXX could use a PBO)
3237 */
3238 buf = malloc(width * height * bpp);
3239 if (!buf) {
3240 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims);
3241 return;
3242 }
3243
3244 _mesa_unlock_texture(ctx, texObj); /* need to unlock first */
3245
3246 /*
3247 * Read image from framebuffer (disable pixel transfer ops)
3248 */
3249 _mesa_meta_begin(ctx, MESA_META_PIXEL_STORE | MESA_META_PIXEL_TRANSFER);
3250 ctx->Driver.ReadPixels(ctx, x, y, width, height,
3251 format, type, &ctx->Pack, buf);
3252 _mesa_meta_end(ctx);
3253
3254 _mesa_update_state(ctx); /* to update pixel transfer state */
3255
3256 /*
3257 * Store texture data (with pixel transfer ops)
3258 */
3259 _mesa_meta_begin(ctx, MESA_META_PIXEL_STORE);
3260
3261 ctx->Driver.TexSubImage(ctx, dims, texImage,
3262 xoffset, yoffset, zoffset, width, height, 1,
3263 format, type, buf, &ctx->Unpack);
3264
3265 _mesa_meta_end(ctx);
3266
3267 _mesa_lock_texture(ctx, texObj); /* re-lock */
3268
3269 free(buf);
3270 }
3271
3272
3273 /**
3274 * Decompress a texture image by drawing a quad with the compressed
3275 * texture and reading the pixels out of the color buffer.
3276 * \param slice which slice of a 3D texture or layer of a 1D/2D texture
3277 * \param destFormat format, ala glReadPixels
3278 * \param destType type, ala glReadPixels
3279 * \param dest destination buffer
3280 * \param destRowLength dest image rowLength (ala GL_PACK_ROW_LENGTH)
3281 */
3282 static void
3283 decompress_texture_image(struct gl_context *ctx,
3284 struct gl_texture_image *texImage,
3285 GLuint slice,
3286 GLenum destFormat, GLenum destType,
3287 GLvoid *dest)
3288 {
3289 struct decompress_state *decompress = &ctx->Meta->Decompress;
3290 struct gl_texture_object *texObj = texImage->TexObject;
3291 const GLint width = texImage->Width;
3292 const GLint height = texImage->Height;
3293 const GLenum target = texObj->Target;
3294 GLenum faceTarget;
3295 struct vertex {
3296 GLfloat x, y, tex[3];
3297 };
3298 struct vertex verts[4];
3299 GLuint fboDrawSave, fboReadSave;
3300 GLuint rbSave;
3301 GLuint samplerSave;
3302
3303 if (slice > 0) {
3304 assert(target == GL_TEXTURE_3D ||
3305 target == GL_TEXTURE_2D_ARRAY);
3306 }
3307
3308 if (target == GL_TEXTURE_CUBE_MAP) {
3309 faceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + texImage->Face;
3310 }
3311 else {
3312 faceTarget = target;
3313 }
3314
3315 /* save fbo bindings (not saved by _mesa_meta_begin()) */
3316 fboDrawSave = ctx->DrawBuffer->Name;
3317 fboReadSave = ctx->ReadBuffer->Name;
3318 rbSave = ctx->CurrentRenderbuffer ? ctx->CurrentRenderbuffer->Name : 0;
3319
3320 _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_PIXEL_STORE);
3321
3322 samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
3323 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
3324
3325 /* Create/bind FBO/renderbuffer */
3326 if (decompress->FBO == 0) {
3327 _mesa_GenFramebuffersEXT(1, &decompress->FBO);
3328 _mesa_GenRenderbuffersEXT(1, &decompress->RBO);
3329 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO);
3330 _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO);
3331 _mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
3332 GL_COLOR_ATTACHMENT0_EXT,
3333 GL_RENDERBUFFER_EXT,
3334 decompress->RBO);
3335 }
3336 else {
3337 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO);
3338 }
3339
3340 /* alloc dest surface */
3341 if (width > decompress->Width || height > decompress->Height) {
3342 _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO);
3343 _mesa_RenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA,
3344 width, height);
3345 decompress->Width = width;
3346 decompress->Height = height;
3347 }
3348
3349 /* setup VBO data */
3350 if (decompress->ArrayObj == 0) {
3351 /* create vertex array object */
3352 _mesa_GenVertexArrays(1, &decompress->ArrayObj);
3353 _mesa_BindVertexArray(decompress->ArrayObj);
3354
3355 /* create vertex array buffer */
3356 _mesa_GenBuffersARB(1, &decompress->VBO);
3357 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO);
3358 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
3359 NULL, GL_DYNAMIC_DRAW_ARB);
3360
3361 /* setup vertex arrays */
3362 _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
3363 _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(tex));
3364 _mesa_EnableClientState(GL_VERTEX_ARRAY);
3365 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
3366 }
3367 else {
3368 _mesa_BindVertexArray(decompress->ArrayObj);
3369 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO);
3370 }
3371
3372 if (!decompress->Sampler) {
3373 _mesa_GenSamplers(1, &decompress->Sampler);
3374 _mesa_BindSampler(ctx->Texture.CurrentUnit, decompress->Sampler);
3375 /* nearest filtering */
3376 _mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
3377 _mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
3378 /* No sRGB decode or encode.*/
3379 if (ctx->Extensions.EXT_texture_sRGB_decode) {
3380 _mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_SRGB_DECODE_EXT,
3381 GL_SKIP_DECODE_EXT);
3382 }
3383
3384 } else {
3385 _mesa_BindSampler(ctx->Texture.CurrentUnit, decompress->Sampler);
3386 }
3387
3388 setup_texture_coords(faceTarget, slice, width, height,
3389 verts[0].tex,
3390 verts[1].tex,
3391 verts[2].tex,
3392 verts[3].tex);
3393
3394 /* setup vertex positions */
3395 verts[0].x = 0.0F;
3396 verts[0].y = 0.0F;
3397 verts[1].x = width;
3398 verts[1].y = 0.0F;
3399 verts[2].x = width;
3400 verts[2].y = height;
3401 verts[3].x = 0.0F;
3402 verts[3].y = height;
3403
3404 /* upload new vertex data */
3405 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
3406
3407 /* setup texture state */
3408 _mesa_BindTexture(target, texObj->Name);
3409 _mesa_set_enable(ctx, target, GL_TRUE);
3410
3411 {
3412 /* save texture object state */
3413 const GLint baseLevelSave = texObj->BaseLevel;
3414 const GLint maxLevelSave = texObj->MaxLevel;
3415
3416 /* restrict sampling to the texture level of interest */
3417 if (target != GL_TEXTURE_RECTANGLE_ARB) {
3418 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, texImage->Level);
3419 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, texImage->Level);
3420 }
3421
3422 /* No sRGB decode or encode.*/
3423 if (ctx->Extensions.EXT_framebuffer_sRGB) {
3424 _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
3425 }
3426
3427 /* render quad w/ texture into renderbuffer */
3428 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
3429
3430 /* Restore texture object state, the texture binding will
3431 * be restored by _mesa_meta_end().
3432 */
3433 if (target != GL_TEXTURE_RECTANGLE_ARB) {
3434 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
3435 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
3436 }
3437
3438 }
3439
3440 /* read pixels from renderbuffer */
3441 {
3442 GLenum baseTexFormat = texImage->_BaseFormat;
3443
3444 /* The pixel transfer state will be set to default values at this point
3445 * (see MESA_META_PIXEL_TRANSFER) so pixel transfer ops are effectively
3446 * turned off (as required by glGetTexImage) but we need to handle some
3447 * special cases. In particular, single-channel texture values are
3448 * returned as red and two-channel texture values are returned as
3449 * red/alpha.
3450 */
3451 if (baseTexFormat == GL_LUMINANCE ||
3452 baseTexFormat == GL_LUMINANCE_ALPHA ||
3453 baseTexFormat == GL_INTENSITY) {
3454 /* Green and blue must be zero */
3455 _mesa_PixelTransferf(GL_GREEN_SCALE, 0.0f);
3456 _mesa_PixelTransferf(GL_BLUE_SCALE, 0.0f);
3457 }
3458
3459 _mesa_ReadPixels(0, 0, width, height, destFormat, destType, dest);
3460 }
3461
3462 /* disable texture unit */
3463 _mesa_set_enable(ctx, target, GL_FALSE);
3464
3465 _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
3466
3467 _mesa_meta_end(ctx);
3468
3469 /* restore fbo bindings */
3470 if (fboDrawSave == fboReadSave) {
3471 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboDrawSave);
3472 }
3473 else {
3474 _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fboDrawSave);
3475 _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fboReadSave);
3476 }
3477 _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, rbSave);
3478 }
3479
3480
3481 /**
3482 * This is just a wrapper around _mesa_get_tex_image() and
3483 * decompress_texture_image(). Meta functions should not be directly called
3484 * from core Mesa.
3485 */
3486 void
3487 _mesa_meta_GetTexImage(struct gl_context *ctx,
3488 GLenum format, GLenum type, GLvoid *pixels,
3489 struct gl_texture_image *texImage)
3490 {
3491 /* We can only use the decompress-with-blit method here if the texels are
3492 * unsigned, normalized values. We could handle signed and unnormalized
3493 * with floating point renderbuffers...
3494 */
3495 if (_mesa_is_format_compressed(texImage->TexFormat) &&
3496 _mesa_get_format_datatype(texImage->TexFormat)
3497 == GL_UNSIGNED_NORMALIZED) {
3498 struct gl_texture_object *texObj = texImage->TexObject;
3499 const GLuint slice = 0; /* only 2D compressed textures for now */
3500 /* Need to unlock the texture here to prevent deadlock... */
3501 _mesa_unlock_texture(ctx, texObj);
3502 decompress_texture_image(ctx, texImage, slice, format, type, pixels);
3503 /* ... and relock it */
3504 _mesa_lock_texture(ctx, texObj);
3505 }
3506 else {
3507 _mesa_get_teximage(ctx, format, type, pixels, texImage);
3508 }
3509 }
3510
3511
3512 /**
3513 * Meta implementation of ctx->Driver.DrawTex() in terms
3514 * of polygon rendering.
3515 */
3516 void
3517 _mesa_meta_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
3518 GLfloat width, GLfloat height)
3519 {
3520 #if FEATURE_OES_draw_texture
3521 struct drawtex_state *drawtex = &ctx->Meta->DrawTex;
3522 struct vertex {
3523 GLfloat x, y, z, st[MAX_TEXTURE_UNITS][2];
3524 };
3525 struct vertex verts[4];
3526 GLuint i;
3527
3528 _mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
3529 MESA_META_SHADER |
3530 MESA_META_TRANSFORM |
3531 MESA_META_VERTEX |
3532 MESA_META_VIEWPORT));
3533
3534 if (drawtex->ArrayObj == 0) {
3535 /* one-time setup */
3536 GLint active_texture;
3537
3538 /* create vertex array object */
3539 _mesa_GenVertexArrays(1, &drawtex->ArrayObj);
3540 _mesa_BindVertexArray(drawtex->ArrayObj);
3541
3542 /* create vertex array buffer */
3543 _mesa_GenBuffersARB(1, &drawtex->VBO);
3544 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, drawtex->VBO);
3545 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
3546 NULL, GL_DYNAMIC_DRAW_ARB);
3547
3548 /* client active texture is not part of the array object */
3549 active_texture = ctx->Array.ActiveTexture;
3550
3551 /* setup vertex arrays */
3552 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
3553 _mesa_EnableClientState(GL_VERTEX_ARRAY);
3554 for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
3555 _mesa_ClientActiveTextureARB(GL_TEXTURE0 + i);
3556 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(st[i]));
3557 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
3558 }
3559
3560 /* restore client active texture */
3561 _mesa_ClientActiveTextureARB(GL_TEXTURE0 + active_texture);
3562 }
3563 else {
3564 _mesa_BindVertexArray(drawtex->ArrayObj);
3565 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, drawtex->VBO);
3566 }
3567
3568 /* vertex positions, texcoords */
3569 {
3570 const GLfloat x1 = x + width;
3571 const GLfloat y1 = y + height;
3572
3573 z = CLAMP(z, 0.0, 1.0);
3574 z = invert_z(z);
3575
3576 verts[0].x = x;
3577 verts[0].y = y;
3578 verts[0].z = z;
3579
3580 verts[1].x = x1;
3581 verts[1].y = y;
3582 verts[1].z = z;
3583
3584 verts[2].x = x1;
3585 verts[2].y = y1;
3586 verts[2].z = z;
3587
3588 verts[3].x = x;
3589 verts[3].y = y1;
3590 verts[3].z = z;
3591
3592 for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
3593 const struct gl_texture_object *texObj;
3594 const struct gl_texture_image *texImage;
3595 GLfloat s, t, s1, t1;
3596 GLuint tw, th;
3597
3598 if (!ctx->Texture.Unit[i]._ReallyEnabled) {
3599 GLuint j;
3600 for (j = 0; j < 4; j++) {
3601 verts[j].st[i][0] = 0.0f;
3602 verts[j].st[i][1] = 0.0f;
3603 }
3604 continue;
3605 }
3606
3607 texObj = ctx->Texture.Unit[i]._Current;
3608 texImage = texObj->Image[0][texObj->BaseLevel];
3609 tw = texImage->Width2;
3610 th = texImage->Height2;
3611
3612 s = (GLfloat) texObj->CropRect[0] / tw;
3613 t = (GLfloat) texObj->CropRect[1] / th;
3614 s1 = (GLfloat) (texObj->CropRect[0] + texObj->CropRect[2]) / tw;
3615 t1 = (GLfloat) (texObj->CropRect[1] + texObj->CropRect[3]) / th;
3616
3617 verts[0].st[i][0] = s;
3618 verts[0].st[i][1] = t;
3619
3620 verts[1].st[i][0] = s1;
3621 verts[1].st[i][1] = t;
3622
3623 verts[2].st[i][0] = s1;
3624 verts[2].st[i][1] = t1;
3625
3626 verts[3].st[i][0] = s;
3627 verts[3].st[i][1] = t1;
3628 }
3629
3630 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
3631 }
3632
3633 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
3634
3635 _mesa_meta_end(ctx);
3636 #endif /* FEATURE_OES_draw_texture */
3637 }