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mesa: move PBO-related functions into a new file
[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/depth.h"
44 #include "main/enable.h"
45 #include "main/fbobject.h"
46 #include "main/formats.h"
47 #include "main/image.h"
48 #include "main/macros.h"
49 #include "main/matrix.h"
50 #include "main/mipmap.h"
51 #include "main/pbo.h"
52 #include "main/polygon.h"
53 #include "main/readpix.h"
54 #include "main/scissor.h"
55 #include "main/shaderapi.h"
56 #include "main/shaderobj.h"
57 #include "main/state.h"
58 #include "main/stencil.h"
59 #include "main/texobj.h"
60 #include "main/texenv.h"
61 #include "main/teximage.h"
62 #include "main/texparam.h"
63 #include "main/texstate.h"
64 #include "main/varray.h"
65 #include "main/viewport.h"
66 #include "program/program.h"
67 #include "swrast/swrast.h"
68 #include "drivers/common/meta.h"
69
70
71 /** Return offset in bytes of the field within a vertex struct */
72 #define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
73
74
75 /**
76 * Flags passed to _mesa_meta_begin().
77 */
78 /*@{*/
79 #define META_ALL ~0x0
80 #define META_ALPHA_TEST 0x1
81 #define META_BLEND 0x2 /**< includes logicop */
82 #define META_COLOR_MASK 0x4
83 #define META_DEPTH_TEST 0x8
84 #define META_FOG 0x10
85 #define META_PIXEL_STORE 0x20
86 #define META_PIXEL_TRANSFER 0x40
87 #define META_RASTERIZATION 0x80
88 #define META_SCISSOR 0x100
89 #define META_SHADER 0x200
90 #define META_STENCIL_TEST 0x400
91 #define META_TRANSFORM 0x800 /**< modelview, projection, clip planes */
92 #define META_TEXTURE 0x1000
93 #define META_VERTEX 0x2000
94 #define META_VIEWPORT 0x4000
95 /*@}*/
96
97
98 /**
99 * State which we may save/restore across meta ops.
100 * XXX this may be incomplete...
101 */
102 struct save_state
103 {
104 GLbitfield SavedState; /**< bitmask of META_* flags */
105
106 /** META_ALPHA_TEST */
107 GLboolean AlphaEnabled;
108 GLenum AlphaFunc;
109 GLclampf AlphaRef;
110
111 /** META_BLEND */
112 GLbitfield BlendEnabled;
113 GLboolean ColorLogicOpEnabled;
114
115 /** META_COLOR_MASK */
116 GLubyte ColorMask[MAX_DRAW_BUFFERS][4];
117
118 /** META_DEPTH_TEST */
119 struct gl_depthbuffer_attrib Depth;
120
121 /** META_FOG */
122 GLboolean Fog;
123
124 /** META_PIXEL_STORE */
125 struct gl_pixelstore_attrib Pack, Unpack;
126
127 /** META_PIXEL_TRANSFER */
128 GLfloat RedBias, RedScale;
129 GLfloat GreenBias, GreenScale;
130 GLfloat BlueBias, BlueScale;
131 GLfloat AlphaBias, AlphaScale;
132 GLfloat DepthBias, DepthScale;
133 GLboolean MapColorFlag;
134
135 /** META_RASTERIZATION */
136 GLenum FrontPolygonMode, BackPolygonMode;
137 GLboolean PolygonOffset;
138 GLboolean PolygonSmooth;
139 GLboolean PolygonStipple;
140 GLboolean PolygonCull;
141
142 /** META_SCISSOR */
143 struct gl_scissor_attrib Scissor;
144
145 /** META_SHADER */
146 GLboolean VertexProgramEnabled;
147 struct gl_vertex_program *VertexProgram;
148 GLboolean FragmentProgramEnabled;
149 struct gl_fragment_program *FragmentProgram;
150 struct gl_shader_program *VertexShader;
151 struct gl_shader_program *GeometryShader;
152 struct gl_shader_program *FragmentShader;
153 struct gl_shader_program *ActiveShader;
154
155 /** META_STENCIL_TEST */
156 struct gl_stencil_attrib Stencil;
157
158 /** META_TRANSFORM */
159 GLenum MatrixMode;
160 GLfloat ModelviewMatrix[16];
161 GLfloat ProjectionMatrix[16];
162 GLfloat TextureMatrix[16];
163 GLbitfield ClipPlanesEnabled;
164
165 /** META_TEXTURE */
166 GLuint ActiveUnit;
167 GLuint ClientActiveUnit;
168 /** for unit[0] only */
169 struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS];
170 /** mask of TEXTURE_2D_BIT, etc */
171 GLbitfield TexEnabled[MAX_TEXTURE_UNITS];
172 GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS];
173 GLuint EnvMode; /* unit[0] only */
174
175 /** META_VERTEX */
176 struct gl_array_object *ArrayObj;
177 struct gl_buffer_object *ArrayBufferObj;
178
179 /** META_VIEWPORT */
180 GLint ViewportX, ViewportY, ViewportW, ViewportH;
181 GLclampd DepthNear, DepthFar;
182
183 /** Miscellaneous (always disabled) */
184 GLboolean Lighting;
185 };
186
187
188 /**
189 * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.
190 * This is currently shared by all the meta ops. But we could create a
191 * separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc.
192 */
193 struct temp_texture
194 {
195 GLuint TexObj;
196 GLenum Target; /**< GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE */
197 GLsizei MinSize; /**< Min texture size to allocate */
198 GLsizei MaxSize; /**< Max possible texture size */
199 GLboolean NPOT; /**< Non-power of two size OK? */
200 GLsizei Width, Height; /**< Current texture size */
201 GLenum IntFormat;
202 GLfloat Sright, Ttop; /**< right, top texcoords */
203 };
204
205
206 /**
207 * State for glBlitFramebufer()
208 */
209 struct blit_state
210 {
211 GLuint ArrayObj;
212 GLuint VBO;
213 GLuint DepthFP;
214 };
215
216
217 /**
218 * State for glClear()
219 */
220 struct clear_state
221 {
222 GLuint ArrayObj;
223 GLuint VBO;
224 };
225
226
227 /**
228 * State for glCopyPixels()
229 */
230 struct copypix_state
231 {
232 GLuint ArrayObj;
233 GLuint VBO;
234 };
235
236
237 /**
238 * State for glDrawPixels()
239 */
240 struct drawpix_state
241 {
242 GLuint ArrayObj;
243
244 GLuint StencilFP; /**< Fragment program for drawing stencil images */
245 GLuint DepthFP; /**< Fragment program for drawing depth images */
246 };
247
248
249 /**
250 * State for glBitmap()
251 */
252 struct bitmap_state
253 {
254 GLuint ArrayObj;
255 GLuint VBO;
256 struct temp_texture Tex; /**< separate texture from other meta ops */
257 };
258
259
260 /**
261 * State for _mesa_meta_generate_mipmap()
262 */
263 struct gen_mipmap_state
264 {
265 GLuint ArrayObj;
266 GLuint VBO;
267 GLuint FBO;
268 };
269
270 #define MAX_META_OPS_DEPTH 2
271 /**
272 * All per-context meta state.
273 */
274 struct gl_meta_state
275 {
276 /** Stack of state saved during meta-ops */
277 struct save_state Save[MAX_META_OPS_DEPTH];
278 /** Save stack depth */
279 GLuint SaveStackDepth;
280
281 struct temp_texture TempTex;
282
283 struct blit_state Blit; /**< For _mesa_meta_BlitFramebuffer() */
284 struct clear_state Clear; /**< For _mesa_meta_Clear() */
285 struct copypix_state CopyPix; /**< For _mesa_meta_CopyPixels() */
286 struct drawpix_state DrawPix; /**< For _mesa_meta_DrawPixels() */
287 struct bitmap_state Bitmap; /**< For _mesa_meta_Bitmap() */
288 struct gen_mipmap_state Mipmap; /**< For _mesa_meta_GenerateMipmap() */
289 };
290
291
292 /**
293 * Initialize meta-ops for a context.
294 * To be called once during context creation.
295 */
296 void
297 _mesa_meta_init(struct gl_context *ctx)
298 {
299 ASSERT(!ctx->Meta);
300
301 ctx->Meta = CALLOC_STRUCT(gl_meta_state);
302 }
303
304
305 /**
306 * Free context meta-op state.
307 * To be called once during context destruction.
308 */
309 void
310 _mesa_meta_free(struct gl_context *ctx)
311 {
312 /* Note: Any textures, VBOs, etc, that we allocate should get
313 * freed by the normal context destruction code. But this would be
314 * the place to free other meta data someday.
315 */
316 free(ctx->Meta);
317 ctx->Meta = NULL;
318 }
319
320
321 /**
322 * Enter meta state. This is like a light-weight version of glPushAttrib
323 * but it also resets most GL state back to default values.
324 *
325 * \param state bitmask of META_* flags indicating which attribute groups
326 * to save and reset to their defaults
327 */
328 static void
329 _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
330 {
331 struct save_state *save;
332
333 /* hope MAX_META_OPS_DEPTH is large enough */
334 assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
335
336 save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
337 memset(save, 0, sizeof(*save));
338 save->SavedState = state;
339
340 if (state & META_ALPHA_TEST) {
341 save->AlphaEnabled = ctx->Color.AlphaEnabled;
342 save->AlphaFunc = ctx->Color.AlphaFunc;
343 save->AlphaRef = ctx->Color.AlphaRef;
344 if (ctx->Color.AlphaEnabled)
345 _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);
346 }
347
348 if (state & META_BLEND) {
349 save->BlendEnabled = ctx->Color.BlendEnabled;
350 if (ctx->Color.BlendEnabled) {
351 if (ctx->Extensions.EXT_draw_buffers2) {
352 GLuint i;
353 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
354 _mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);
355 }
356 }
357 else {
358 _mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
359 }
360 }
361 save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
362 if (ctx->Color.ColorLogicOpEnabled)
363 _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
364 }
365
366 if (state & META_COLOR_MASK) {
367 memcpy(save->ColorMask, ctx->Color.ColorMask,
368 sizeof(ctx->Color.ColorMask));
369 if (!ctx->Color.ColorMask[0][0] ||
370 !ctx->Color.ColorMask[0][1] ||
371 !ctx->Color.ColorMask[0][2] ||
372 !ctx->Color.ColorMask[0][3])
373 _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
374 }
375
376 if (state & META_DEPTH_TEST) {
377 save->Depth = ctx->Depth; /* struct copy */
378 if (ctx->Depth.Test)
379 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
380 }
381
382 if (state & META_FOG) {
383 save->Fog = ctx->Fog.Enabled;
384 if (ctx->Fog.Enabled)
385 _mesa_set_enable(ctx, GL_FOG, GL_FALSE);
386 }
387
388 if (state & META_PIXEL_STORE) {
389 save->Pack = ctx->Pack;
390 save->Unpack = ctx->Unpack;
391 ctx->Pack = ctx->DefaultPacking;
392 ctx->Unpack = ctx->DefaultPacking;
393 }
394
395 if (state & META_PIXEL_TRANSFER) {
396 save->RedScale = ctx->Pixel.RedScale;
397 save->RedBias = ctx->Pixel.RedBias;
398 save->GreenScale = ctx->Pixel.GreenScale;
399 save->GreenBias = ctx->Pixel.GreenBias;
400 save->BlueScale = ctx->Pixel.BlueScale;
401 save->BlueBias = ctx->Pixel.BlueBias;
402 save->AlphaScale = ctx->Pixel.AlphaScale;
403 save->AlphaBias = ctx->Pixel.AlphaBias;
404 save->MapColorFlag = ctx->Pixel.MapColorFlag;
405 ctx->Pixel.RedScale = 1.0F;
406 ctx->Pixel.RedBias = 0.0F;
407 ctx->Pixel.GreenScale = 1.0F;
408 ctx->Pixel.GreenBias = 0.0F;
409 ctx->Pixel.BlueScale = 1.0F;
410 ctx->Pixel.BlueBias = 0.0F;
411 ctx->Pixel.AlphaScale = 1.0F;
412 ctx->Pixel.AlphaBias = 0.0F;
413 ctx->Pixel.MapColorFlag = GL_FALSE;
414 /* XXX more state */
415 ctx->NewState |=_NEW_PIXEL;
416 }
417
418 if (state & META_RASTERIZATION) {
419 save->FrontPolygonMode = ctx->Polygon.FrontMode;
420 save->BackPolygonMode = ctx->Polygon.BackMode;
421 save->PolygonOffset = ctx->Polygon.OffsetFill;
422 save->PolygonSmooth = ctx->Polygon.SmoothFlag;
423 save->PolygonStipple = ctx->Polygon.StippleFlag;
424 save->PolygonCull = ctx->Polygon.CullFlag;
425 _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
426 _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);
427 _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);
428 _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);
429 _mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);
430 }
431
432 if (state & META_SCISSOR) {
433 save->Scissor = ctx->Scissor; /* struct copy */
434 _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);
435 }
436
437 if (state & META_SHADER) {
438 if (ctx->Extensions.ARB_vertex_program) {
439 save->VertexProgramEnabled = ctx->VertexProgram.Enabled;
440 _mesa_reference_vertprog(ctx, &save->VertexProgram,
441 ctx->VertexProgram.Current);
442 _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE);
443 }
444
445 if (ctx->Extensions.ARB_fragment_program) {
446 save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled;
447 _mesa_reference_fragprog(ctx, &save->FragmentProgram,
448 ctx->FragmentProgram.Current);
449 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE);
450 }
451
452 if (ctx->Extensions.ARB_shader_objects) {
453 _mesa_reference_shader_program(ctx, &save->VertexShader,
454 ctx->Shader.CurrentVertexProgram);
455 _mesa_reference_shader_program(ctx, &save->GeometryShader,
456 ctx->Shader.CurrentGeometryProgram);
457 _mesa_reference_shader_program(ctx, &save->FragmentShader,
458 ctx->Shader.CurrentFragmentProgram);
459 _mesa_reference_shader_program(ctx, &save->ActiveShader,
460 ctx->Shader.CurrentFragmentProgram);
461
462 _mesa_UseProgramObjectARB(0);
463 }
464 }
465
466 if (state & META_STENCIL_TEST) {
467 save->Stencil = ctx->Stencil; /* struct copy */
468 if (ctx->Stencil.Enabled)
469 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
470 /* NOTE: other stencil state not reset */
471 }
472
473 if (state & META_TEXTURE) {
474 GLuint u, tgt;
475
476 save->ActiveUnit = ctx->Texture.CurrentUnit;
477 save->ClientActiveUnit = ctx->Array.ActiveTexture;
478 save->EnvMode = ctx->Texture.Unit[0].EnvMode;
479
480 /* Disable all texture units */
481 for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
482 save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled;
483 save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled;
484 if (ctx->Texture.Unit[u].Enabled ||
485 ctx->Texture.Unit[u].TexGenEnabled) {
486 _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
487 _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);
488 _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);
489 _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE);
490 if (ctx->Extensions.ARB_texture_cube_map)
491 _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);
492 _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE);
493 _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);
494 _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);
495 _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);
496 _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
497 }
498 }
499
500 /* save current texture objects for unit[0] only */
501 for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
502 _mesa_reference_texobj(&save->CurrentTexture[tgt],
503 ctx->Texture.Unit[0].CurrentTex[tgt]);
504 }
505
506 /* set defaults for unit[0] */
507 _mesa_ActiveTextureARB(GL_TEXTURE0);
508 _mesa_ClientActiveTextureARB(GL_TEXTURE0);
509 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
510 }
511
512 if (state & META_TRANSFORM) {
513 GLuint activeTexture = ctx->Texture.CurrentUnit;
514 memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,
515 16 * sizeof(GLfloat));
516 memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,
517 16 * sizeof(GLfloat));
518 memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m,
519 16 * sizeof(GLfloat));
520 save->MatrixMode = ctx->Transform.MatrixMode;
521 /* set 1:1 vertex:pixel coordinate transform */
522 _mesa_ActiveTextureARB(GL_TEXTURE0);
523 _mesa_MatrixMode(GL_TEXTURE);
524 _mesa_LoadIdentity();
525 _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
526 _mesa_MatrixMode(GL_MODELVIEW);
527 _mesa_LoadIdentity();
528 _mesa_MatrixMode(GL_PROJECTION);
529 _mesa_LoadIdentity();
530 _mesa_Ortho(0.0, ctx->DrawBuffer->Width,
531 0.0, ctx->DrawBuffer->Height,
532 -1.0, 1.0);
533 save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;
534 if (ctx->Transform.ClipPlanesEnabled) {
535 GLuint i;
536 for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
537 _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
538 }
539 }
540 }
541
542 if (state & META_VERTEX) {
543 /* save vertex array object state */
544 _mesa_reference_array_object(ctx, &save->ArrayObj,
545 ctx->Array.ArrayObj);
546 _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj,
547 ctx->Array.ArrayBufferObj);
548 /* set some default state? */
549 }
550
551 if (state & META_VIEWPORT) {
552 /* save viewport state */
553 save->ViewportX = ctx->Viewport.X;
554 save->ViewportY = ctx->Viewport.Y;
555 save->ViewportW = ctx->Viewport.Width;
556 save->ViewportH = ctx->Viewport.Height;
557 /* set viewport to match window size */
558 if (ctx->Viewport.X != 0 ||
559 ctx->Viewport.Y != 0 ||
560 ctx->Viewport.Width != ctx->DrawBuffer->Width ||
561 ctx->Viewport.Height != ctx->DrawBuffer->Height) {
562 _mesa_set_viewport(ctx, 0, 0,
563 ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
564 }
565 /* save depth range state */
566 save->DepthNear = ctx->Viewport.Near;
567 save->DepthFar = ctx->Viewport.Far;
568 /* set depth range to default */
569 _mesa_DepthRange(0.0, 1.0);
570 }
571
572 /* misc */
573 {
574 save->Lighting = ctx->Light.Enabled;
575 if (ctx->Light.Enabled)
576 _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);
577 }
578 }
579
580
581 /**
582 * Leave meta state. This is like a light-weight version of glPopAttrib().
583 */
584 static void
585 _mesa_meta_end(struct gl_context *ctx)
586 {
587 struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];
588 const GLbitfield state = save->SavedState;
589
590 if (state & META_ALPHA_TEST) {
591 if (ctx->Color.AlphaEnabled != save->AlphaEnabled)
592 _mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);
593 _mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);
594 }
595
596 if (state & META_BLEND) {
597 if (ctx->Color.BlendEnabled != save->BlendEnabled) {
598 if (ctx->Extensions.EXT_draw_buffers2) {
599 GLuint i;
600 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
601 _mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);
602 }
603 }
604 else {
605 _mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));
606 }
607 }
608 if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
609 _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
610 }
611
612 if (state & META_COLOR_MASK) {
613 GLuint i;
614 for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
615 if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {
616 if (i == 0) {
617 _mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],
618 save->ColorMask[i][2], save->ColorMask[i][3]);
619 }
620 else {
621 _mesa_ColorMaskIndexed(i,
622 save->ColorMask[i][0],
623 save->ColorMask[i][1],
624 save->ColorMask[i][2],
625 save->ColorMask[i][3]);
626 }
627 }
628 }
629 }
630
631 if (state & META_DEPTH_TEST) {
632 if (ctx->Depth.Test != save->Depth.Test)
633 _mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);
634 _mesa_DepthFunc(save->Depth.Func);
635 _mesa_DepthMask(save->Depth.Mask);
636 }
637
638 if (state & META_FOG) {
639 _mesa_set_enable(ctx, GL_FOG, save->Fog);
640 }
641
642 if (state & META_PIXEL_STORE) {
643 ctx->Pack = save->Pack;
644 ctx->Unpack = save->Unpack;
645 }
646
647 if (state & META_PIXEL_TRANSFER) {
648 ctx->Pixel.RedScale = save->RedScale;
649 ctx->Pixel.RedBias = save->RedBias;
650 ctx->Pixel.GreenScale = save->GreenScale;
651 ctx->Pixel.GreenBias = save->GreenBias;
652 ctx->Pixel.BlueScale = save->BlueScale;
653 ctx->Pixel.BlueBias = save->BlueBias;
654 ctx->Pixel.AlphaScale = save->AlphaScale;
655 ctx->Pixel.AlphaBias = save->AlphaBias;
656 ctx->Pixel.MapColorFlag = save->MapColorFlag;
657 /* XXX more state */
658 ctx->NewState |=_NEW_PIXEL;
659 }
660
661 if (state & META_RASTERIZATION) {
662 _mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);
663 _mesa_PolygonMode(GL_BACK, save->BackPolygonMode);
664 _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);
665 _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);
666 _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);
667 _mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);
668 }
669
670 if (state & META_SCISSOR) {
671 _mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);
672 _mesa_Scissor(save->Scissor.X, save->Scissor.Y,
673 save->Scissor.Width, save->Scissor.Height);
674 }
675
676 if (state & META_SHADER) {
677 if (ctx->Extensions.ARB_vertex_program) {
678 _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB,
679 save->VertexProgramEnabled);
680 _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
681 save->VertexProgram);
682 _mesa_reference_vertprog(ctx, &save->VertexProgram, NULL);
683 }
684
685 if (ctx->Extensions.ARB_fragment_program) {
686 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB,
687 save->FragmentProgramEnabled);
688 _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
689 save->FragmentProgram);
690 _mesa_reference_fragprog(ctx, &save->FragmentProgram, NULL);
691 }
692
693 if (ctx->Extensions.ARB_vertex_shader)
694 _mesa_use_shader_program(ctx, GL_VERTEX_SHADER, save->VertexShader);
695
696 if (ctx->Extensions.ARB_geometry_shader4)
697 _mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER_ARB,
698 save->GeometryShader);
699
700 if (ctx->Extensions.ARB_fragment_shader)
701 _mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER,
702 save->FragmentShader);
703
704 _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram,
705 save->ActiveShader);
706 }
707
708 if (state & META_STENCIL_TEST) {
709 const struct gl_stencil_attrib *stencil = &save->Stencil;
710
711 _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
712 _mesa_ClearStencil(stencil->Clear);
713 if (ctx->Extensions.EXT_stencil_two_side) {
714 _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
715 stencil->TestTwoSide);
716 _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
717 ? GL_BACK : GL_FRONT);
718 }
719 /* front state */
720 _mesa_StencilFuncSeparate(GL_FRONT,
721 stencil->Function[0],
722 stencil->Ref[0],
723 stencil->ValueMask[0]);
724 _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
725 _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
726 stencil->ZFailFunc[0],
727 stencil->ZPassFunc[0]);
728 /* back state */
729 _mesa_StencilFuncSeparate(GL_BACK,
730 stencil->Function[1],
731 stencil->Ref[1],
732 stencil->ValueMask[1]);
733 _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
734 _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
735 stencil->ZFailFunc[1],
736 stencil->ZPassFunc[1]);
737 }
738
739 if (state & META_TEXTURE) {
740 GLuint u, tgt;
741
742 ASSERT(ctx->Texture.CurrentUnit == 0);
743
744 /* restore texenv for unit[0] */
745 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);
746
747 /* restore texture objects for unit[0] only */
748 for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
749 _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
750 save->CurrentTexture[tgt]);
751 _mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
752 }
753
754 /* Re-enable textures, texgen */
755 for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
756 if (save->TexEnabled[u]) {
757 _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
758
759 if (save->TexEnabled[u] & TEXTURE_1D_BIT)
760 _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_TRUE);
761 if (save->TexEnabled[u] & TEXTURE_2D_BIT)
762 _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_TRUE);
763 if (save->TexEnabled[u] & TEXTURE_3D_BIT)
764 _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_TRUE);
765 if (save->TexEnabled[u] & TEXTURE_CUBE_BIT)
766 _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_TRUE);
767 if (save->TexEnabled[u] & TEXTURE_RECT_BIT)
768 _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_TRUE);
769 }
770
771 if (save->TexGenEnabled[u]) {
772 _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
773
774 if (save->TexGenEnabled[u] & S_BIT)
775 _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_TRUE);
776 if (save->TexGenEnabled[u] & T_BIT)
777 _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_TRUE);
778 if (save->TexGenEnabled[u] & R_BIT)
779 _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_TRUE);
780 if (save->TexGenEnabled[u] & Q_BIT)
781 _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
782 }
783 }
784
785 /* restore current unit state */
786 _mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit);
787 _mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit);
788 }
789
790 if (state & META_TRANSFORM) {
791 GLuint activeTexture = ctx->Texture.CurrentUnit;
792 _mesa_ActiveTextureARB(GL_TEXTURE0);
793 _mesa_MatrixMode(GL_TEXTURE);
794 _mesa_LoadMatrixf(save->TextureMatrix);
795 _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
796
797 _mesa_MatrixMode(GL_MODELVIEW);
798 _mesa_LoadMatrixf(save->ModelviewMatrix);
799
800 _mesa_MatrixMode(GL_PROJECTION);
801 _mesa_LoadMatrixf(save->ProjectionMatrix);
802
803 _mesa_MatrixMode(save->MatrixMode);
804
805 if (save->ClipPlanesEnabled) {
806 GLuint i;
807 for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
808 if (save->ClipPlanesEnabled & (1 << i)) {
809 _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
810 }
811 }
812 }
813 }
814
815 if (state & META_VERTEX) {
816 /* restore vertex buffer object */
817 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name);
818 _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL);
819
820 /* restore vertex array object */
821 _mesa_BindVertexArray(save->ArrayObj->Name);
822 _mesa_reference_array_object(ctx, &save->ArrayObj, NULL);
823 }
824
825 if (state & META_VIEWPORT) {
826 if (save->ViewportX != ctx->Viewport.X ||
827 save->ViewportY != ctx->Viewport.Y ||
828 save->ViewportW != ctx->Viewport.Width ||
829 save->ViewportH != ctx->Viewport.Height) {
830 _mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,
831 save->ViewportW, save->ViewportH);
832 }
833 _mesa_DepthRange(save->DepthNear, save->DepthFar);
834 }
835
836 /* misc */
837 if (save->Lighting) {
838 _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);
839 }
840 }
841
842
843 /**
844 * Convert Z from a normalized value in the range [0, 1] to an object-space
845 * Z coordinate in [-1, +1] so that drawing at the new Z position with the
846 * default/identity ortho projection results in the original Z value.
847 * Used by the meta-Clear, Draw/CopyPixels and Bitmap functions where the Z
848 * value comes from the clear value or raster position.
849 */
850 static INLINE GLfloat
851 invert_z(GLfloat normZ)
852 {
853 GLfloat objZ = 1.0 - 2.0 * normZ;
854 return objZ;
855 }
856
857
858 /**
859 * One-time init for a temp_texture object.
860 * Choose tex target, compute max tex size, etc.
861 */
862 static void
863 init_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
864 {
865 /* prefer texture rectangle */
866 if (ctx->Extensions.NV_texture_rectangle) {
867 tex->Target = GL_TEXTURE_RECTANGLE;
868 tex->MaxSize = ctx->Const.MaxTextureRectSize;
869 tex->NPOT = GL_TRUE;
870 }
871 else {
872 /* use 2D texture, NPOT if possible */
873 tex->Target = GL_TEXTURE_2D;
874 tex->MaxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
875 tex->NPOT = ctx->Extensions.ARB_texture_non_power_of_two;
876 }
877 tex->MinSize = 16; /* 16 x 16 at least */
878 assert(tex->MaxSize > 0);
879
880 _mesa_GenTextures(1, &tex->TexObj);
881 }
882
883
884 /**
885 * Return pointer to temp_texture info for non-bitmap ops.
886 * This does some one-time init if needed.
887 */
888 static struct temp_texture *
889 get_temp_texture(struct gl_context *ctx)
890 {
891 struct temp_texture *tex = &ctx->Meta->TempTex;
892
893 if (!tex->TexObj) {
894 init_temp_texture(ctx, tex);
895 }
896
897 return tex;
898 }
899
900
901 /**
902 * Return pointer to temp_texture info for _mesa_meta_bitmap().
903 * We use a separate texture for bitmaps to reduce texture
904 * allocation/deallocation.
905 */
906 static struct temp_texture *
907 get_bitmap_temp_texture(struct gl_context *ctx)
908 {
909 struct temp_texture *tex = &ctx->Meta->Bitmap.Tex;
910
911 if (!tex->TexObj) {
912 init_temp_texture(ctx, tex);
913 }
914
915 return tex;
916 }
917
918
919 /**
920 * Compute the width/height of texture needed to draw an image of the
921 * given size. Return a flag indicating whether the current texture
922 * can be re-used (glTexSubImage2D) or if a new texture needs to be
923 * allocated (glTexImage2D).
924 * Also, compute s/t texcoords for drawing.
925 *
926 * \return GL_TRUE if new texture is needed, GL_FALSE otherwise
927 */
928 static GLboolean
929 alloc_texture(struct temp_texture *tex,
930 GLsizei width, GLsizei height, GLenum intFormat)
931 {
932 GLboolean newTex = GL_FALSE;
933
934 ASSERT(width <= tex->MaxSize);
935 ASSERT(height <= tex->MaxSize);
936
937 if (width > tex->Width ||
938 height > tex->Height ||
939 intFormat != tex->IntFormat) {
940 /* alloc new texture (larger or different format) */
941
942 if (tex->NPOT) {
943 /* use non-power of two size */
944 tex->Width = MAX2(tex->MinSize, width);
945 tex->Height = MAX2(tex->MinSize, height);
946 }
947 else {
948 /* find power of two size */
949 GLsizei w, h;
950 w = h = tex->MinSize;
951 while (w < width)
952 w *= 2;
953 while (h < height)
954 h *= 2;
955 tex->Width = w;
956 tex->Height = h;
957 }
958
959 tex->IntFormat = intFormat;
960
961 newTex = GL_TRUE;
962 }
963
964 /* compute texcoords */
965 if (tex->Target == GL_TEXTURE_RECTANGLE) {
966 tex->Sright = (GLfloat) width;
967 tex->Ttop = (GLfloat) height;
968 }
969 else {
970 tex->Sright = (GLfloat) width / tex->Width;
971 tex->Ttop = (GLfloat) height / tex->Height;
972 }
973
974 return newTex;
975 }
976
977
978 /**
979 * Setup/load texture for glCopyPixels or glBlitFramebuffer.
980 */
981 static void
982 setup_copypix_texture(struct temp_texture *tex,
983 GLboolean newTex,
984 GLint srcX, GLint srcY,
985 GLsizei width, GLsizei height, GLenum intFormat,
986 GLenum filter)
987 {
988 _mesa_BindTexture(tex->Target, tex->TexObj);
989 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, filter);
990 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, filter);
991 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
992
993 /* copy framebuffer image to texture */
994 if (newTex) {
995 /* create new tex image */
996 if (tex->Width == width && tex->Height == height) {
997 /* create new tex with framebuffer data */
998 _mesa_CopyTexImage2D(tex->Target, 0, tex->IntFormat,
999 srcX, srcY, width, height, 0);
1000 }
1001 else {
1002 /* create empty texture */
1003 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1004 tex->Width, tex->Height, 0,
1005 intFormat, GL_UNSIGNED_BYTE, NULL);
1006 /* load image */
1007 _mesa_CopyTexSubImage2D(tex->Target, 0,
1008 0, 0, srcX, srcY, width, height);
1009 }
1010 }
1011 else {
1012 /* replace existing tex image */
1013 _mesa_CopyTexSubImage2D(tex->Target, 0,
1014 0, 0, srcX, srcY, width, height);
1015 }
1016 }
1017
1018
1019 /**
1020 * Setup/load texture for glDrawPixels.
1021 */
1022 static void
1023 setup_drawpix_texture(struct gl_context *ctx,
1024 struct temp_texture *tex,
1025 GLboolean newTex,
1026 GLenum texIntFormat,
1027 GLsizei width, GLsizei height,
1028 GLenum format, GLenum type,
1029 const GLvoid *pixels)
1030 {
1031 _mesa_BindTexture(tex->Target, tex->TexObj);
1032 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1033 _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1034 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1035
1036 /* copy pixel data to texture */
1037 if (newTex) {
1038 /* create new tex image */
1039 if (tex->Width == width && tex->Height == height) {
1040 /* create new tex and load image data */
1041 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1042 tex->Width, tex->Height, 0, format, type, pixels);
1043 }
1044 else {
1045 struct gl_buffer_object *save_unpack_obj = NULL;
1046
1047 _mesa_reference_buffer_object(ctx, &save_unpack_obj,
1048 ctx->Unpack.BufferObj);
1049 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
1050 /* create empty texture */
1051 _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
1052 tex->Width, tex->Height, 0, format, type, NULL);
1053 if (save_unpack_obj != NULL)
1054 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB,
1055 save_unpack_obj->Name);
1056 /* load image */
1057 _mesa_TexSubImage2D(tex->Target, 0,
1058 0, 0, width, height, format, type, pixels);
1059 }
1060 }
1061 else {
1062 /* replace existing tex image */
1063 _mesa_TexSubImage2D(tex->Target, 0,
1064 0, 0, width, height, format, type, pixels);
1065 }
1066 }
1067
1068
1069
1070 /**
1071 * One-time init for drawing depth pixels.
1072 */
1073 static void
1074 init_blit_depth_pixels(struct gl_context *ctx)
1075 {
1076 static const char *program =
1077 "!!ARBfp1.0\n"
1078 "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
1079 "END \n";
1080 char program2[200];
1081 struct blit_state *blit = &ctx->Meta->Blit;
1082 struct temp_texture *tex = get_temp_texture(ctx);
1083 const char *texTarget;
1084
1085 assert(blit->DepthFP == 0);
1086
1087 /* replace %s with "RECT" or "2D" */
1088 assert(strlen(program) + 4 < sizeof(program2));
1089 if (tex->Target == GL_TEXTURE_RECTANGLE)
1090 texTarget = "RECT";
1091 else
1092 texTarget = "2D";
1093 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
1094
1095 _mesa_GenPrograms(1, &blit->DepthFP);
1096 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
1097 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
1098 strlen(program2), (const GLubyte *) program2);
1099 }
1100
1101
1102 /**
1103 * Try to do a glBlitFramebuffer using no-copy texturing.
1104 * We can do this when the src renderbuffer is actually a texture.
1105 * But if the src buffer == dst buffer we cannot do this.
1106 *
1107 * \return new buffer mask indicating the buffers left to blit using the
1108 * normal path.
1109 */
1110 static GLbitfield
1111 blitframebuffer_texture(struct gl_context *ctx,
1112 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1113 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1114 GLbitfield mask, GLenum filter)
1115 {
1116 if (mask & GL_COLOR_BUFFER_BIT) {
1117 const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
1118 const struct gl_framebuffer *readFb = ctx->ReadBuffer;
1119 const struct gl_renderbuffer_attachment *drawAtt =
1120 &drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]];
1121 const struct gl_renderbuffer_attachment *readAtt =
1122 &readFb->Attachment[readFb->_ColorReadBufferIndex];
1123
1124 if (readAtt && readAtt->Texture) {
1125 const struct gl_texture_object *texObj = readAtt->Texture;
1126 const GLuint srcLevel = readAtt->TextureLevel;
1127 const GLenum minFilterSave = texObj->MinFilter;
1128 const GLenum magFilterSave = texObj->MagFilter;
1129 const GLint baseLevelSave = texObj->BaseLevel;
1130 const GLint maxLevelSave = texObj->MaxLevel;
1131 const GLenum wrapSSave = texObj->WrapS;
1132 const GLenum wrapTSave = texObj->WrapT;
1133 const GLenum target = texObj->Target;
1134
1135 if (drawAtt->Texture == readAtt->Texture) {
1136 /* Can't use same texture as both the source and dest. We need
1137 * to handle overlapping blits and besides, some hw may not
1138 * support this.
1139 */
1140 return mask;
1141 }
1142
1143 if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
1144 /* Can't handle other texture types at this time */
1145 return mask;
1146 }
1147
1148 /*
1149 printf("Blit from texture!\n");
1150 printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
1151 printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
1152 */
1153
1154 /* Prepare src texture state */
1155 _mesa_BindTexture(target, texObj->Name);
1156 _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
1157 _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
1158 if (target != GL_TEXTURE_RECTANGLE_ARB) {
1159 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
1160 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
1161 }
1162 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1163 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1164 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1165 _mesa_set_enable(ctx, target, GL_TRUE);
1166
1167 /* Prepare vertex data (the VBO was previously created and bound) */
1168 {
1169 struct vertex {
1170 GLfloat x, y, s, t;
1171 };
1172 struct vertex verts[4];
1173 GLfloat s0, t0, s1, t1;
1174
1175 if (target == GL_TEXTURE_2D) {
1176 const struct gl_texture_image *texImage
1177 = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
1178 s0 = srcX0 / (float) texImage->Width;
1179 s1 = srcX1 / (float) texImage->Width;
1180 t0 = srcY0 / (float) texImage->Height;
1181 t1 = srcY1 / (float) texImage->Height;
1182 }
1183 else {
1184 assert(target == GL_TEXTURE_RECTANGLE_ARB);
1185 s0 = srcX0;
1186 s1 = srcX1;
1187 t0 = srcY0;
1188 t1 = srcY1;
1189 }
1190
1191 verts[0].x = (GLfloat) dstX0;
1192 verts[0].y = (GLfloat) dstY0;
1193 verts[1].x = (GLfloat) dstX1;
1194 verts[1].y = (GLfloat) dstY0;
1195 verts[2].x = (GLfloat) dstX1;
1196 verts[2].y = (GLfloat) dstY1;
1197 verts[3].x = (GLfloat) dstX0;
1198 verts[3].y = (GLfloat) dstY1;
1199
1200 verts[0].s = s0;
1201 verts[0].t = t0;
1202 verts[1].s = s1;
1203 verts[1].t = t0;
1204 verts[2].s = s1;
1205 verts[2].t = t1;
1206 verts[3].s = s0;
1207 verts[3].t = t1;
1208
1209 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
1210 }
1211
1212 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1213
1214 /* Restore texture object state, the texture binding will
1215 * be restored by _mesa_meta_end().
1216 */
1217 _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);
1218 _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);
1219 if (target != GL_TEXTURE_RECTANGLE_ARB) {
1220 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
1221 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
1222 }
1223 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);
1224 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);
1225
1226 /* Done with color buffer */
1227 mask &= ~GL_COLOR_BUFFER_BIT;
1228 }
1229 }
1230
1231 return mask;
1232 }
1233
1234
1235 /**
1236 * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
1237 * of texture mapping and polygon rendering.
1238 */
1239 void
1240 _mesa_meta_BlitFramebuffer(struct gl_context *ctx,
1241 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1242 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1243 GLbitfield mask, GLenum filter)
1244 {
1245 struct blit_state *blit = &ctx->Meta->Blit;
1246 struct temp_texture *tex = get_temp_texture(ctx);
1247 const GLsizei maxTexSize = tex->MaxSize;
1248 const GLint srcX = MIN2(srcX0, srcX1);
1249 const GLint srcY = MIN2(srcY0, srcY1);
1250 const GLint srcW = abs(srcX1 - srcX0);
1251 const GLint srcH = abs(srcY1 - srcY0);
1252 const GLboolean srcFlipX = srcX1 < srcX0;
1253 const GLboolean srcFlipY = srcY1 < srcY0;
1254 struct vertex {
1255 GLfloat x, y, s, t;
1256 };
1257 struct vertex verts[4];
1258 GLboolean newTex;
1259
1260 if (srcW > maxTexSize || srcH > maxTexSize) {
1261 /* XXX avoid this fallback */
1262 _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
1263 dstX0, dstY0, dstX1, dstY1, mask, filter);
1264 return;
1265 }
1266
1267 if (srcFlipX) {
1268 GLint tmp = dstX0;
1269 dstX0 = dstX1;
1270 dstX1 = tmp;
1271 }
1272
1273 if (srcFlipY) {
1274 GLint tmp = dstY0;
1275 dstY0 = dstY1;
1276 dstY1 = tmp;
1277 }
1278
1279 /* only scissor effects blit so save/clear all other relevant state */
1280 _mesa_meta_begin(ctx, ~META_SCISSOR);
1281
1282 if (blit->ArrayObj == 0) {
1283 /* one-time setup */
1284
1285 /* create vertex array object */
1286 _mesa_GenVertexArrays(1, &blit->ArrayObj);
1287 _mesa_BindVertexArray(blit->ArrayObj);
1288
1289 /* create vertex array buffer */
1290 _mesa_GenBuffersARB(1, &blit->VBO);
1291 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
1292 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
1293 NULL, GL_DYNAMIC_DRAW_ARB);
1294
1295 /* setup vertex arrays */
1296 _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1297 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
1298 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1299 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
1300 }
1301 else {
1302 _mesa_BindVertexArray(blit->ArrayObj);
1303 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
1304 }
1305
1306 /* Try faster, direct texture approach first */
1307 mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
1308 dstX0, dstY0, dstX1, dstY1, mask, filter);
1309 if (mask == 0x0) {
1310 _mesa_meta_end(ctx);
1311 return;
1312 }
1313
1314 /* Continue with "normal" approach which involves copying the src rect
1315 * into a temporary texture and is "blitted" by drawing a textured quad.
1316 */
1317
1318 newTex = alloc_texture(tex, srcW, srcH, GL_RGBA);
1319
1320 /* vertex positions/texcoords (after texture allocation!) */
1321 {
1322 verts[0].x = (GLfloat) dstX0;
1323 verts[0].y = (GLfloat) dstY0;
1324 verts[1].x = (GLfloat) dstX1;
1325 verts[1].y = (GLfloat) dstY0;
1326 verts[2].x = (GLfloat) dstX1;
1327 verts[2].y = (GLfloat) dstY1;
1328 verts[3].x = (GLfloat) dstX0;
1329 verts[3].y = (GLfloat) dstY1;
1330
1331 verts[0].s = 0.0F;
1332 verts[0].t = 0.0F;
1333 verts[1].s = tex->Sright;
1334 verts[1].t = 0.0F;
1335 verts[2].s = tex->Sright;
1336 verts[2].t = tex->Ttop;
1337 verts[3].s = 0.0F;
1338 verts[3].t = tex->Ttop;
1339
1340 /* upload new vertex data */
1341 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
1342 }
1343
1344 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
1345
1346 if (mask & GL_COLOR_BUFFER_BIT) {
1347 setup_copypix_texture(tex, newTex, srcX, srcY, srcW, srcH,
1348 GL_RGBA, filter);
1349 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1350 mask &= ~GL_COLOR_BUFFER_BIT;
1351 }
1352
1353 if (mask & GL_DEPTH_BUFFER_BIT) {
1354 GLuint *tmp = (GLuint *) malloc(srcW * srcH * sizeof(GLuint));
1355 if (tmp) {
1356 if (!blit->DepthFP)
1357 init_blit_depth_pixels(ctx);
1358
1359 /* maybe change tex format here */
1360 newTex = alloc_texture(tex, srcW, srcH, GL_DEPTH_COMPONENT);
1361
1362 _mesa_ReadPixels(srcX, srcY, srcW, srcH,
1363 GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
1364
1365 setup_drawpix_texture(ctx, tex, newTex, GL_DEPTH_COMPONENT, srcW, srcH,
1366 GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
1367
1368 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
1369 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
1370 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1371 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1372 _mesa_DepthFunc(GL_ALWAYS);
1373 _mesa_DepthMask(GL_TRUE);
1374
1375 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1376 mask &= ~GL_DEPTH_BUFFER_BIT;
1377
1378 free(tmp);
1379 }
1380 }
1381
1382 if (mask & GL_STENCIL_BUFFER_BIT) {
1383 /* XXX can't easily do stencil */
1384 }
1385
1386 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
1387
1388 _mesa_meta_end(ctx);
1389
1390 if (mask) {
1391 _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
1392 dstX0, dstY0, dstX1, dstY1, mask, filter);
1393 }
1394 }
1395
1396
1397 /**
1398 * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
1399 */
1400 void
1401 _mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
1402 {
1403 struct clear_state *clear = &ctx->Meta->Clear;
1404 struct vertex {
1405 GLfloat x, y, z, r, g, b, a;
1406 };
1407 struct vertex verts[4];
1408 /* save all state but scissor, pixel pack/unpack */
1409 GLbitfield metaSave = META_ALL - META_SCISSOR - META_PIXEL_STORE;
1410 const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
1411
1412 if (buffers & BUFFER_BITS_COLOR) {
1413 /* if clearing color buffers, don't save/restore colormask */
1414 metaSave -= META_COLOR_MASK;
1415 }
1416
1417 _mesa_meta_begin(ctx, metaSave);
1418
1419 if (clear->ArrayObj == 0) {
1420 /* one-time setup */
1421
1422 /* create vertex array object */
1423 _mesa_GenVertexArrays(1, &clear->ArrayObj);
1424 _mesa_BindVertexArray(clear->ArrayObj);
1425
1426 /* create vertex array buffer */
1427 _mesa_GenBuffersARB(1, &clear->VBO);
1428 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1429
1430 /* setup vertex arrays */
1431 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1432 _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
1433 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1434 _mesa_EnableClientState(GL_COLOR_ARRAY);
1435 }
1436 else {
1437 _mesa_BindVertexArray(clear->ArrayObj);
1438 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
1439 }
1440
1441 /* GL_COLOR_BUFFER_BIT */
1442 if (buffers & BUFFER_BITS_COLOR) {
1443 /* leave colormask, glDrawBuffer state as-is */
1444 }
1445 else {
1446 ASSERT(metaSave & META_COLOR_MASK);
1447 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1448 }
1449
1450 /* GL_DEPTH_BUFFER_BIT */
1451 if (buffers & BUFFER_BIT_DEPTH) {
1452 _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1453 _mesa_DepthFunc(GL_ALWAYS);
1454 _mesa_DepthMask(GL_TRUE);
1455 }
1456 else {
1457 assert(!ctx->Depth.Test);
1458 }
1459
1460 /* GL_STENCIL_BUFFER_BIT */
1461 if (buffers & BUFFER_BIT_STENCIL) {
1462 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
1463 _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
1464 GL_REPLACE, GL_REPLACE, GL_REPLACE);
1465 _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
1466 ctx->Stencil.Clear & stencilMax,
1467 ctx->Stencil.WriteMask[0]);
1468 }
1469 else {
1470 assert(!ctx->Stencil.Enabled);
1471 }
1472
1473 /* vertex positions/colors */
1474 {
1475 const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;
1476 const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin;
1477 const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;
1478 const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax;
1479 const GLfloat z = invert_z(ctx->Depth.Clear);
1480 GLuint i;
1481
1482 verts[0].x = x0;
1483 verts[0].y = y0;
1484 verts[0].z = z;
1485 verts[1].x = x1;
1486 verts[1].y = y0;
1487 verts[1].z = z;
1488 verts[2].x = x1;
1489 verts[2].y = y1;
1490 verts[2].z = z;
1491 verts[3].x = x0;
1492 verts[3].y = y1;
1493 verts[3].z = z;
1494
1495 /* vertex colors */
1496 for (i = 0; i < 4; i++) {
1497 verts[i].r = ctx->Color.ClearColor[0];
1498 verts[i].g = ctx->Color.ClearColor[1];
1499 verts[i].b = ctx->Color.ClearColor[2];
1500 verts[i].a = ctx->Color.ClearColor[3];
1501 }
1502
1503 /* upload new vertex data */
1504 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
1505 GL_DYNAMIC_DRAW_ARB);
1506 }
1507
1508 /* draw quad */
1509 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1510
1511 _mesa_meta_end(ctx);
1512 }
1513
1514
1515 /**
1516 * Meta implementation of ctx->Driver.CopyPixels() in terms
1517 * of texture mapping and polygon rendering.
1518 */
1519 void
1520 _mesa_meta_CopyPixels(struct gl_context *ctx, GLint srcX, GLint srcY,
1521 GLsizei width, GLsizei height,
1522 GLint dstX, GLint dstY, GLenum type)
1523 {
1524 struct copypix_state *copypix = &ctx->Meta->CopyPix;
1525 struct temp_texture *tex = get_temp_texture(ctx);
1526 struct vertex {
1527 GLfloat x, y, z, s, t;
1528 };
1529 struct vertex verts[4];
1530 GLboolean newTex;
1531 GLenum intFormat = GL_RGBA;
1532
1533 if (type != GL_COLOR ||
1534 ctx->_ImageTransferState ||
1535 ctx->Fog.Enabled ||
1536 width > tex->MaxSize ||
1537 height > tex->MaxSize) {
1538 /* XXX avoid this fallback */
1539 _swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type);
1540 return;
1541 }
1542
1543 /* Most GL state applies to glCopyPixels, but a there's a few things
1544 * we need to override:
1545 */
1546 _mesa_meta_begin(ctx, (META_RASTERIZATION |
1547 META_SHADER |
1548 META_TEXTURE |
1549 META_TRANSFORM |
1550 META_VERTEX |
1551 META_VIEWPORT));
1552
1553 if (copypix->ArrayObj == 0) {
1554 /* one-time setup */
1555
1556 /* create vertex array object */
1557 _mesa_GenVertexArrays(1, &copypix->ArrayObj);
1558 _mesa_BindVertexArray(copypix->ArrayObj);
1559
1560 /* create vertex array buffer */
1561 _mesa_GenBuffersARB(1, &copypix->VBO);
1562 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
1563 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
1564 NULL, GL_DYNAMIC_DRAW_ARB);
1565
1566 /* setup vertex arrays */
1567 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1568 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
1569 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1570 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
1571 }
1572 else {
1573 _mesa_BindVertexArray(copypix->ArrayObj);
1574 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
1575 }
1576
1577 newTex = alloc_texture(tex, width, height, intFormat);
1578
1579 /* vertex positions, texcoords (after texture allocation!) */
1580 {
1581 const GLfloat dstX0 = (GLfloat) dstX;
1582 const GLfloat dstY0 = (GLfloat) dstY;
1583 const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX;
1584 const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY;
1585 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
1586
1587 verts[0].x = dstX0;
1588 verts[0].y = dstY0;
1589 verts[0].z = z;
1590 verts[0].s = 0.0F;
1591 verts[0].t = 0.0F;
1592 verts[1].x = dstX1;
1593 verts[1].y = dstY0;
1594 verts[1].z = z;
1595 verts[1].s = tex->Sright;
1596 verts[1].t = 0.0F;
1597 verts[2].x = dstX1;
1598 verts[2].y = dstY1;
1599 verts[2].z = z;
1600 verts[2].s = tex->Sright;
1601 verts[2].t = tex->Ttop;
1602 verts[3].x = dstX0;
1603 verts[3].y = dstY1;
1604 verts[3].z = z;
1605 verts[3].s = 0.0F;
1606 verts[3].t = tex->Ttop;
1607
1608 /* upload new vertex data */
1609 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
1610 }
1611
1612 /* Alloc/setup texture */
1613 setup_copypix_texture(tex, newTex, srcX, srcY, width, height,
1614 GL_RGBA, GL_NEAREST);
1615
1616 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
1617
1618 /* draw textured quad */
1619 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1620
1621 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
1622
1623 _mesa_meta_end(ctx);
1624 }
1625
1626
1627
1628 /**
1629 * When the glDrawPixels() image size is greater than the max rectangle
1630 * texture size we use this function to break the glDrawPixels() image
1631 * into tiles which fit into the max texture size.
1632 */
1633 static void
1634 tiled_draw_pixels(struct gl_context *ctx,
1635 GLint tileSize,
1636 GLint x, GLint y, GLsizei width, GLsizei height,
1637 GLenum format, GLenum type,
1638 const struct gl_pixelstore_attrib *unpack,
1639 const GLvoid *pixels)
1640 {
1641 struct gl_pixelstore_attrib tileUnpack = *unpack;
1642 GLint i, j;
1643
1644 if (tileUnpack.RowLength == 0)
1645 tileUnpack.RowLength = width;
1646
1647 for (i = 0; i < width; i += tileSize) {
1648 const GLint tileWidth = MIN2(tileSize, width - i);
1649 const GLint tileX = (GLint) (x + i * ctx->Pixel.ZoomX);
1650
1651 tileUnpack.SkipPixels = unpack->SkipPixels + i;
1652
1653 for (j = 0; j < height; j += tileSize) {
1654 const GLint tileHeight = MIN2(tileSize, height - j);
1655 const GLint tileY = (GLint) (y + j * ctx->Pixel.ZoomY);
1656
1657 tileUnpack.SkipRows = unpack->SkipRows + j;
1658
1659 _mesa_meta_DrawPixels(ctx, tileX, tileY, tileWidth, tileHeight,
1660 format, type, &tileUnpack, pixels);
1661 }
1662 }
1663 }
1664
1665
1666 /**
1667 * One-time init for drawing stencil pixels.
1668 */
1669 static void
1670 init_draw_stencil_pixels(struct gl_context *ctx)
1671 {
1672 /* This program is run eight times, once for each stencil bit.
1673 * The stencil values to draw are found in an 8-bit alpha texture.
1674 * We read the texture/stencil value and test if bit 'b' is set.
1675 * If the bit is not set, use KIL to kill the fragment.
1676 * Finally, we use the stencil test to update the stencil buffer.
1677 *
1678 * The basic algorithm for checking if a bit is set is:
1679 * if (is_odd(value / (1 << bit)))
1680 * result is one (or non-zero).
1681 * else
1682 * result is zero.
1683 * The program parameter contains three values:
1684 * parm.x = 255 / (1 << bit)
1685 * parm.y = 0.5
1686 * parm.z = 0.0
1687 */
1688 static const char *program =
1689 "!!ARBfp1.0\n"
1690 "PARAM parm = program.local[0]; \n"
1691 "TEMP t; \n"
1692 "TEX t, fragment.texcoord[0], texture[0], %s; \n" /* NOTE %s here! */
1693 "# t = t * 255 / bit \n"
1694 "MUL t.x, t.a, parm.x; \n"
1695 "# t = (int) t \n"
1696 "FRC t.y, t.x; \n"
1697 "SUB t.x, t.x, t.y; \n"
1698 "# t = t * 0.5 \n"
1699 "MUL t.x, t.x, parm.y; \n"
1700 "# t = fract(t.x) \n"
1701 "FRC t.x, t.x; # if t.x != 0, then the bit is set \n"
1702 "# t.x = (t.x == 0 ? 1 : 0) \n"
1703 "SGE t.x, -t.x, parm.z; \n"
1704 "KIL -t.x; \n"
1705 "# for debug only \n"
1706 "#MOV result.color, t.x; \n"
1707 "END \n";
1708 char program2[1000];
1709 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
1710 struct temp_texture *tex = get_temp_texture(ctx);
1711 const char *texTarget;
1712
1713 assert(drawpix->StencilFP == 0);
1714
1715 /* replace %s with "RECT" or "2D" */
1716 assert(strlen(program) + 4 < sizeof(program2));
1717 if (tex->Target == GL_TEXTURE_RECTANGLE)
1718 texTarget = "RECT";
1719 else
1720 texTarget = "2D";
1721 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
1722
1723 _mesa_GenPrograms(1, &drawpix->StencilFP);
1724 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
1725 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
1726 strlen(program2), (const GLubyte *) program2);
1727 }
1728
1729
1730 /**
1731 * One-time init for drawing depth pixels.
1732 */
1733 static void
1734 init_draw_depth_pixels(struct gl_context *ctx)
1735 {
1736 static const char *program =
1737 "!!ARBfp1.0\n"
1738 "PARAM color = program.local[0]; \n"
1739 "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
1740 "MOV result.color, color; \n"
1741 "END \n";
1742 char program2[200];
1743 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
1744 struct temp_texture *tex = get_temp_texture(ctx);
1745 const char *texTarget;
1746
1747 assert(drawpix->DepthFP == 0);
1748
1749 /* replace %s with "RECT" or "2D" */
1750 assert(strlen(program) + 4 < sizeof(program2));
1751 if (tex->Target == GL_TEXTURE_RECTANGLE)
1752 texTarget = "RECT";
1753 else
1754 texTarget = "2D";
1755 _mesa_snprintf(program2, sizeof(program2), program, texTarget);
1756
1757 _mesa_GenPrograms(1, &drawpix->DepthFP);
1758 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
1759 _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
1760 strlen(program2), (const GLubyte *) program2);
1761 }
1762
1763
1764 /**
1765 * Meta implementation of ctx->Driver.DrawPixels() in terms
1766 * of texture mapping and polygon rendering.
1767 */
1768 void
1769 _mesa_meta_DrawPixels(struct gl_context *ctx,
1770 GLint x, GLint y, GLsizei width, GLsizei height,
1771 GLenum format, GLenum type,
1772 const struct gl_pixelstore_attrib *unpack,
1773 const GLvoid *pixels)
1774 {
1775 struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
1776 struct temp_texture *tex = get_temp_texture(ctx);
1777 const struct gl_pixelstore_attrib unpackSave = ctx->Unpack;
1778 const GLuint origStencilMask = ctx->Stencil.WriteMask[0];
1779 struct vertex {
1780 GLfloat x, y, z, s, t;
1781 };
1782 struct vertex verts[4];
1783 GLenum texIntFormat;
1784 GLboolean fallback, newTex;
1785 GLbitfield metaExtraSave = 0x0;
1786 GLuint vbo;
1787
1788 /*
1789 * Determine if we can do the glDrawPixels with texture mapping.
1790 */
1791 fallback = GL_FALSE;
1792 if (ctx->_ImageTransferState ||
1793 ctx->Fog.Enabled) {
1794 fallback = GL_TRUE;
1795 }
1796
1797 if (_mesa_is_color_format(format)) {
1798 /* use more compact format when possible */
1799 /* XXX disable special case for GL_LUMINANCE for now to work around
1800 * apparent i965 driver bug (see bug #23670).
1801 */
1802 if (/*format == GL_LUMINANCE ||*/ format == GL_LUMINANCE_ALPHA)
1803 texIntFormat = format;
1804 else
1805 texIntFormat = GL_RGBA;
1806 }
1807 else if (_mesa_is_stencil_format(format)) {
1808 if (ctx->Extensions.ARB_fragment_program &&
1809 ctx->Pixel.IndexShift == 0 &&
1810 ctx->Pixel.IndexOffset == 0 &&
1811 type == GL_UNSIGNED_BYTE) {
1812 /* We'll store stencil as alpha. This only works for GLubyte
1813 * image data because of how incoming values are mapped to alpha
1814 * in [0,1].
1815 */
1816 texIntFormat = GL_ALPHA;
1817 metaExtraSave = (META_COLOR_MASK |
1818 META_DEPTH_TEST |
1819 META_SHADER |
1820 META_STENCIL_TEST);
1821 }
1822 else {
1823 fallback = GL_TRUE;
1824 }
1825 }
1826 else if (_mesa_is_depth_format(format)) {
1827 if (ctx->Extensions.ARB_depth_texture &&
1828 ctx->Extensions.ARB_fragment_program) {
1829 texIntFormat = GL_DEPTH_COMPONENT;
1830 metaExtraSave = (META_SHADER);
1831 }
1832 else {
1833 fallback = GL_TRUE;
1834 }
1835 }
1836 else {
1837 fallback = GL_TRUE;
1838 }
1839
1840 if (fallback) {
1841 _swrast_DrawPixels(ctx, x, y, width, height,
1842 format, type, unpack, pixels);
1843 return;
1844 }
1845
1846 /*
1847 * Check image size against max texture size, draw as tiles if needed.
1848 */
1849 if (width > tex->MaxSize || height > tex->MaxSize) {
1850 tiled_draw_pixels(ctx, tex->MaxSize, x, y, width, height,
1851 format, type, unpack, pixels);
1852 return;
1853 }
1854
1855 /* Most GL state applies to glDrawPixels (like blending, stencil, etc),
1856 * but a there's a few things we need to override:
1857 */
1858 _mesa_meta_begin(ctx, (META_RASTERIZATION |
1859 META_SHADER |
1860 META_TEXTURE |
1861 META_TRANSFORM |
1862 META_VERTEX |
1863 META_VIEWPORT |
1864 metaExtraSave));
1865
1866 newTex = alloc_texture(tex, width, height, texIntFormat);
1867
1868 /* vertex positions, texcoords (after texture allocation!) */
1869 {
1870 const GLfloat x0 = (GLfloat) x;
1871 const GLfloat y0 = (GLfloat) y;
1872 const GLfloat x1 = x + width * ctx->Pixel.ZoomX;
1873 const GLfloat y1 = y + height * ctx->Pixel.ZoomY;
1874 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
1875
1876 verts[0].x = x0;
1877 verts[0].y = y0;
1878 verts[0].z = z;
1879 verts[0].s = 0.0F;
1880 verts[0].t = 0.0F;
1881 verts[1].x = x1;
1882 verts[1].y = y0;
1883 verts[1].z = z;
1884 verts[1].s = tex->Sright;
1885 verts[1].t = 0.0F;
1886 verts[2].x = x1;
1887 verts[2].y = y1;
1888 verts[2].z = z;
1889 verts[2].s = tex->Sright;
1890 verts[2].t = tex->Ttop;
1891 verts[3].x = x0;
1892 verts[3].y = y1;
1893 verts[3].z = z;
1894 verts[3].s = 0.0F;
1895 verts[3].t = tex->Ttop;
1896 }
1897
1898 if (drawpix->ArrayObj == 0) {
1899 /* one-time setup: create vertex array object */
1900 _mesa_GenVertexArrays(1, &drawpix->ArrayObj);
1901 }
1902 _mesa_BindVertexArray(drawpix->ArrayObj);
1903
1904 /* create vertex array buffer */
1905 _mesa_GenBuffersARB(1, &vbo);
1906 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
1907 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
1908 verts, GL_DYNAMIC_DRAW_ARB);
1909
1910 /* setup vertex arrays */
1911 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
1912 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
1913 _mesa_EnableClientState(GL_VERTEX_ARRAY);
1914 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
1915
1916 /* set given unpack params */
1917 ctx->Unpack = *unpack;
1918
1919 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
1920
1921 if (_mesa_is_stencil_format(format)) {
1922 /* Drawing stencil */
1923 GLint bit;
1924
1925 if (!drawpix->StencilFP)
1926 init_draw_stencil_pixels(ctx);
1927
1928 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
1929 GL_ALPHA, type, pixels);
1930
1931 _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1932
1933 _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
1934
1935 /* set all stencil bits to 0 */
1936 _mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
1937 _mesa_StencilFunc(GL_ALWAYS, 0, 255);
1938 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1939
1940 /* set stencil bits to 1 where needed */
1941 _mesa_StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
1942
1943 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
1944 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
1945
1946 for (bit = 0; bit < ctx->DrawBuffer->Visual.stencilBits; bit++) {
1947 const GLuint mask = 1 << bit;
1948 if (mask & origStencilMask) {
1949 _mesa_StencilFunc(GL_ALWAYS, mask, mask);
1950 _mesa_StencilMask(mask);
1951
1952 _mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,
1953 255.0 / mask, 0.5, 0.0, 0.0);
1954
1955 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1956 }
1957 }
1958 }
1959 else if (_mesa_is_depth_format(format)) {
1960 /* Drawing depth */
1961 if (!drawpix->DepthFP)
1962 init_draw_depth_pixels(ctx);
1963
1964 _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
1965 _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
1966
1967 /* polygon color = current raster color */
1968 _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
1969 ctx->Current.RasterColor);
1970
1971 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
1972 format, type, pixels);
1973
1974 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1975 }
1976 else {
1977 /* Drawing RGBA */
1978 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
1979 format, type, pixels);
1980 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
1981 }
1982
1983 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
1984
1985 _mesa_DeleteBuffersARB(1, &vbo);
1986
1987 /* restore unpack params */
1988 ctx->Unpack = unpackSave;
1989
1990 _mesa_meta_end(ctx);
1991 }
1992
1993 static GLboolean
1994 alpha_test_raster_color(struct gl_context *ctx)
1995 {
1996 GLfloat alpha = ctx->Current.RasterColor[ACOMP];
1997 GLfloat ref = ctx->Color.AlphaRef;
1998
1999 switch (ctx->Color.AlphaFunc) {
2000 case GL_NEVER:
2001 return GL_FALSE;
2002 case GL_LESS:
2003 return alpha < ref;
2004 case GL_EQUAL:
2005 return alpha == ref;
2006 case GL_LEQUAL:
2007 return alpha <= ref;
2008 case GL_GREATER:
2009 return alpha > ref;
2010 case GL_NOTEQUAL:
2011 return alpha != ref;
2012 case GL_GEQUAL:
2013 return alpha >= ref;
2014 case GL_ALWAYS:
2015 return GL_TRUE;
2016 default:
2017 assert(0);
2018 return GL_FALSE;
2019 }
2020 }
2021
2022 /**
2023 * Do glBitmap with a alpha texture quad. Use the alpha test to cull
2024 * the 'off' bits. A bitmap cache as in the gallium/mesa state
2025 * tracker would improve performance a lot.
2026 */
2027 void
2028 _mesa_meta_Bitmap(struct gl_context *ctx,
2029 GLint x, GLint y, GLsizei width, GLsizei height,
2030 const struct gl_pixelstore_attrib *unpack,
2031 const GLubyte *bitmap1)
2032 {
2033 struct bitmap_state *bitmap = &ctx->Meta->Bitmap;
2034 struct temp_texture *tex = get_bitmap_temp_texture(ctx);
2035 const GLenum texIntFormat = GL_ALPHA;
2036 const struct gl_pixelstore_attrib unpackSave = *unpack;
2037 GLubyte fg, bg;
2038 struct vertex {
2039 GLfloat x, y, z, s, t, r, g, b, a;
2040 };
2041 struct vertex verts[4];
2042 GLboolean newTex;
2043 GLubyte *bitmap8;
2044
2045 /*
2046 * Check if swrast fallback is needed.
2047 */
2048 if (ctx->_ImageTransferState ||
2049 ctx->FragmentProgram._Enabled ||
2050 ctx->Fog.Enabled ||
2051 ctx->Texture._EnabledUnits ||
2052 width > tex->MaxSize ||
2053 height > tex->MaxSize) {
2054 _swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1);
2055 return;
2056 }
2057
2058 if (ctx->Color.AlphaEnabled && !alpha_test_raster_color(ctx))
2059 return;
2060
2061 /* Most GL state applies to glBitmap (like blending, stencil, etc),
2062 * but a there's a few things we need to override:
2063 */
2064 _mesa_meta_begin(ctx, (META_ALPHA_TEST |
2065 META_PIXEL_STORE |
2066 META_RASTERIZATION |
2067 META_SHADER |
2068 META_TEXTURE |
2069 META_TRANSFORM |
2070 META_VERTEX |
2071 META_VIEWPORT));
2072
2073 if (bitmap->ArrayObj == 0) {
2074 /* one-time setup */
2075
2076 /* create vertex array object */
2077 _mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj);
2078 _mesa_BindVertexArrayAPPLE(bitmap->ArrayObj);
2079
2080 /* create vertex array buffer */
2081 _mesa_GenBuffersARB(1, &bitmap->VBO);
2082 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
2083 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2084 NULL, GL_DYNAMIC_DRAW_ARB);
2085
2086 /* setup vertex arrays */
2087 _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2088 _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
2089 _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
2090 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2091 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2092 _mesa_EnableClientState(GL_COLOR_ARRAY);
2093 }
2094 else {
2095 _mesa_BindVertexArray(bitmap->ArrayObj);
2096 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
2097 }
2098
2099 newTex = alloc_texture(tex, width, height, texIntFormat);
2100
2101 /* vertex positions, texcoords, colors (after texture allocation!) */
2102 {
2103 const GLfloat x0 = (GLfloat) x;
2104 const GLfloat y0 = (GLfloat) y;
2105 const GLfloat x1 = (GLfloat) (x + width);
2106 const GLfloat y1 = (GLfloat) (y + height);
2107 const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
2108 GLuint i;
2109
2110 verts[0].x = x0;
2111 verts[0].y = y0;
2112 verts[0].z = z;
2113 verts[0].s = 0.0F;
2114 verts[0].t = 0.0F;
2115 verts[1].x = x1;
2116 verts[1].y = y0;
2117 verts[1].z = z;
2118 verts[1].s = tex->Sright;
2119 verts[1].t = 0.0F;
2120 verts[2].x = x1;
2121 verts[2].y = y1;
2122 verts[2].z = z;
2123 verts[2].s = tex->Sright;
2124 verts[2].t = tex->Ttop;
2125 verts[3].x = x0;
2126 verts[3].y = y1;
2127 verts[3].z = z;
2128 verts[3].s = 0.0F;
2129 verts[3].t = tex->Ttop;
2130
2131 for (i = 0; i < 4; i++) {
2132 verts[i].r = ctx->Current.RasterColor[0];
2133 verts[i].g = ctx->Current.RasterColor[1];
2134 verts[i].b = ctx->Current.RasterColor[2];
2135 verts[i].a = ctx->Current.RasterColor[3];
2136 }
2137
2138 /* upload new vertex data */
2139 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
2140 }
2141
2142 /* choose different foreground/background alpha values */
2143 CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]);
2144 bg = (fg > 127 ? 0 : 255);
2145
2146 bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1);
2147 if (!bitmap1) {
2148 _mesa_meta_end(ctx);
2149 return;
2150 }
2151
2152 bitmap8 = (GLubyte *) malloc(width * height);
2153 if (bitmap8) {
2154 memset(bitmap8, bg, width * height);
2155 _mesa_expand_bitmap(width, height, &unpackSave, bitmap1,
2156 bitmap8, width, fg);
2157
2158 _mesa_set_enable(ctx, tex->Target, GL_TRUE);
2159
2160 _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE);
2161 _mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg));
2162
2163 setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
2164 GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8);
2165
2166 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2167
2168 _mesa_set_enable(ctx, tex->Target, GL_FALSE);
2169
2170 free(bitmap8);
2171 }
2172
2173 _mesa_unmap_pbo_source(ctx, &unpackSave);
2174
2175 _mesa_meta_end(ctx);
2176 }
2177
2178
2179 /**
2180 * Check if the call to _mesa_meta_GenerateMipmap() will require a
2181 * software fallback. The fallback path will require that the texture
2182 * images are mapped.
2183 * \return GL_TRUE if a fallback is needed, GL_FALSE otherwise
2184 */
2185 GLboolean
2186 _mesa_meta_check_generate_mipmap_fallback(struct gl_context *ctx, GLenum target,
2187 struct gl_texture_object *texObj)
2188 {
2189 const GLuint fboSave = ctx->DrawBuffer->Name;
2190 struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
2191 struct gl_texture_image *baseImage;
2192 GLuint srcLevel;
2193 GLenum status;
2194
2195 /* check for fallbacks */
2196 if (!ctx->Extensions.EXT_framebuffer_object ||
2197 target == GL_TEXTURE_3D) {
2198 return GL_TRUE;
2199 }
2200
2201 srcLevel = texObj->BaseLevel;
2202 baseImage = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
2203 if (!baseImage || _mesa_is_format_compressed(baseImage->TexFormat)) {
2204 return GL_TRUE;
2205 }
2206
2207 /*
2208 * Test that we can actually render in the texture's format.
2209 */
2210 if (!mipmap->FBO)
2211 _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
2212 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
2213
2214 if (target == GL_TEXTURE_1D) {
2215 _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
2216 GL_COLOR_ATTACHMENT0_EXT,
2217 target, texObj->Name, srcLevel);
2218 }
2219 #if 0
2220 /* other work is needed to enable 3D mipmap generation */
2221 else if (target == GL_TEXTURE_3D) {
2222 GLint zoffset = 0;
2223 _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
2224 GL_COLOR_ATTACHMENT0_EXT,
2225 target, texObj->Name, srcLevel, zoffset);
2226 }
2227 #endif
2228 else {
2229 /* 2D / cube */
2230 _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
2231 GL_COLOR_ATTACHMENT0_EXT,
2232 target, texObj->Name, srcLevel);
2233 }
2234
2235 status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
2236
2237 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
2238
2239 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2240 return GL_TRUE;
2241 }
2242
2243 return GL_FALSE;
2244 }
2245
2246
2247 /**
2248 * Called via ctx->Driver.GenerateMipmap()
2249 * Note: texture borders and 3D texture support not yet complete.
2250 */
2251 void
2252 _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
2253 struct gl_texture_object *texObj)
2254 {
2255 struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
2256 struct vertex {
2257 GLfloat x, y, s, t, r;
2258 };
2259 struct vertex verts[4];
2260 const GLuint baseLevel = texObj->BaseLevel;
2261 const GLuint maxLevel = texObj->MaxLevel;
2262 const GLenum minFilterSave = texObj->MinFilter;
2263 const GLenum magFilterSave = texObj->MagFilter;
2264 const GLint maxLevelSave = texObj->MaxLevel;
2265 const GLboolean genMipmapSave = texObj->GenerateMipmap;
2266 const GLenum wrapSSave = texObj->WrapS;
2267 const GLenum wrapTSave = texObj->WrapT;
2268 const GLenum wrapRSave = texObj->WrapR;
2269 const GLuint fboSave = ctx->DrawBuffer->Name;
2270 const GLuint original_active_unit = ctx->Texture.CurrentUnit;
2271 GLenum faceTarget;
2272 GLuint dstLevel;
2273 GLuint border = 0;
2274
2275 if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
2276 _mesa_generate_mipmap(ctx, target, texObj);
2277 return;
2278 }
2279
2280 if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
2281 target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
2282 faceTarget = target;
2283 target = GL_TEXTURE_CUBE_MAP;
2284 }
2285 else {
2286 faceTarget = target;
2287 }
2288
2289 _mesa_meta_begin(ctx, META_ALL);
2290
2291 if (original_active_unit != 0)
2292 _mesa_BindTexture(target, texObj->Name);
2293
2294 if (mipmap->ArrayObj == 0) {
2295 /* one-time setup */
2296
2297 /* create vertex array object */
2298 _mesa_GenVertexArraysAPPLE(1, &mipmap->ArrayObj);
2299 _mesa_BindVertexArrayAPPLE(mipmap->ArrayObj);
2300
2301 /* create vertex array buffer */
2302 _mesa_GenBuffersARB(1, &mipmap->VBO);
2303 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
2304 _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
2305 NULL, GL_DYNAMIC_DRAW_ARB);
2306
2307 /* setup vertex arrays */
2308 _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
2309 _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
2310 _mesa_EnableClientState(GL_VERTEX_ARRAY);
2311 _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
2312 }
2313 else {
2314 _mesa_BindVertexArray(mipmap->ArrayObj);
2315 _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
2316 }
2317
2318 if (!mipmap->FBO) {
2319 _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
2320 }
2321 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
2322
2323 _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
2324 _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2325 _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
2326 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2327 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2328 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
2329
2330 _mesa_set_enable(ctx, target, GL_TRUE);
2331
2332 /* setup texcoords once (XXX what about border?) */
2333 switch (faceTarget) {
2334 case GL_TEXTURE_1D:
2335 case GL_TEXTURE_2D:
2336 verts[0].s = 0.0F;
2337 verts[0].t = 0.0F;
2338 verts[0].r = 0.0F;
2339 verts[1].s = 1.0F;
2340 verts[1].t = 0.0F;
2341 verts[1].r = 0.0F;
2342 verts[2].s = 1.0F;
2343 verts[2].t = 1.0F;
2344 verts[2].r = 0.0F;
2345 verts[3].s = 0.0F;
2346 verts[3].t = 1.0F;
2347 verts[3].r = 0.0F;
2348 break;
2349 case GL_TEXTURE_3D:
2350 abort();
2351 break;
2352 default:
2353 /* cube face */
2354 {
2355 static const GLfloat st[4][2] = {
2356 {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
2357 };
2358 GLuint i;
2359
2360 /* loop over quad verts */
2361 for (i = 0; i < 4; i++) {
2362 /* Compute sc = +/-scale and tc = +/-scale.
2363 * Not +/-1 to avoid cube face selection ambiguity near the edges,
2364 * though that can still sometimes happen with this scale factor...
2365 */
2366 const GLfloat scale = 0.9999f;
2367 const GLfloat sc = (2.0f * st[i][0] - 1.0f) * scale;
2368 const GLfloat tc = (2.0f * st[i][1] - 1.0f) * scale;
2369
2370 switch (faceTarget) {
2371 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
2372 verts[i].s = 1.0f;
2373 verts[i].t = -tc;
2374 verts[i].r = -sc;
2375 break;
2376 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
2377 verts[i].s = -1.0f;
2378 verts[i].t = -tc;
2379 verts[i].r = sc;
2380 break;
2381 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
2382 verts[i].s = sc;
2383 verts[i].t = 1.0f;
2384 verts[i].r = tc;
2385 break;
2386 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
2387 verts[i].s = sc;
2388 verts[i].t = -1.0f;
2389 verts[i].r = -tc;
2390 break;
2391 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
2392 verts[i].s = sc;
2393 verts[i].t = -tc;
2394 verts[i].r = 1.0f;
2395 break;
2396 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
2397 verts[i].s = -sc;
2398 verts[i].t = -tc;
2399 verts[i].r = -1.0f;
2400 break;
2401 default:
2402 assert(0);
2403 }
2404 }
2405 }
2406 }
2407
2408 _mesa_set_enable(ctx, target, GL_TRUE);
2409
2410 /* setup vertex positions */
2411 {
2412 verts[0].x = 0.0F;
2413 verts[0].y = 0.0F;
2414 verts[1].x = 1.0F;
2415 verts[1].y = 0.0F;
2416 verts[2].x = 1.0F;
2417 verts[2].y = 1.0F;
2418 verts[3].x = 0.0F;
2419 verts[3].y = 1.0F;
2420
2421 /* upload new vertex data */
2422 _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
2423 }
2424
2425 /* setup projection matrix */
2426 _mesa_MatrixMode(GL_PROJECTION);
2427 _mesa_LoadIdentity();
2428 _mesa_Ortho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
2429
2430 /* texture is already locked, unlock now */
2431 _mesa_unlock_texture(ctx, texObj);
2432
2433 for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
2434 const struct gl_texture_image *srcImage;
2435 const GLuint srcLevel = dstLevel - 1;
2436 GLsizei srcWidth, srcHeight, srcDepth;
2437 GLsizei dstWidth, dstHeight, dstDepth;
2438 GLenum status;
2439
2440 srcImage = _mesa_select_tex_image(ctx, texObj, faceTarget, srcLevel);
2441 assert(srcImage->Border == 0); /* XXX we can fix this */
2442
2443 /* src size w/out border */
2444 srcWidth = srcImage->Width - 2 * border;
2445 srcHeight = srcImage->Height - 2 * border;
2446 srcDepth = srcImage->Depth - 2 * border;
2447
2448 /* new dst size w/ border */
2449 dstWidth = MAX2(1, srcWidth / 2) + 2 * border;
2450 dstHeight = MAX2(1, srcHeight / 2) + 2 * border;
2451 dstDepth = MAX2(1, srcDepth / 2) + 2 * border;
2452
2453 if (dstWidth == srcImage->Width &&
2454 dstHeight == srcImage->Height &&
2455 dstDepth == srcImage->Depth) {
2456 /* all done */
2457 break;
2458 }
2459
2460 /* Set MaxLevel large enough to hold the new level when we allocate it */
2461 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
2462
2463 /* Create empty dest image */
2464 if (target == GL_TEXTURE_1D) {
2465 _mesa_TexImage1D(target, dstLevel, srcImage->InternalFormat,
2466 dstWidth, border,
2467 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
2468 }
2469 else if (target == GL_TEXTURE_3D) {
2470 _mesa_TexImage3D(target, dstLevel, srcImage->InternalFormat,
2471 dstWidth, dstHeight, dstDepth, border,
2472 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
2473 }
2474 else {
2475 /* 2D or cube */
2476 _mesa_TexImage2D(faceTarget, dstLevel, srcImage->InternalFormat,
2477 dstWidth, dstHeight, border,
2478 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
2479
2480 if (target == GL_TEXTURE_CUBE_MAP) {
2481 /* If texturing from a cube, we need to make sure all src faces
2482 * have been defined (even if we're not sampling from them.)
2483 * Otherwise the texture object will be 'incomplete' and
2484 * texturing from it will not be allowed.
2485 */
2486 GLuint face;
2487 for (face = 0; face < 6; face++) {
2488 if (!texObj->Image[face][srcLevel] ||
2489 texObj->Image[face][srcLevel]->Width != srcWidth) {
2490 _mesa_TexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face,
2491 srcLevel, srcImage->InternalFormat,
2492 srcWidth, srcHeight, border,
2493 GL_RGBA, GL_UNSIGNED_BYTE, NULL);
2494 }
2495 }
2496 }
2497 }
2498
2499 /* limit minification to src level */
2500 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
2501
2502 /* Set to draw into the current dstLevel */
2503 if (target == GL_TEXTURE_1D) {
2504 _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
2505 GL_COLOR_ATTACHMENT0_EXT,
2506 target,
2507 texObj->Name,
2508 dstLevel);
2509 }
2510 else if (target == GL_TEXTURE_3D) {
2511 GLint zoffset = 0; /* XXX unfinished */
2512 _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
2513 GL_COLOR_ATTACHMENT0_EXT,
2514 target,
2515 texObj->Name,
2516 dstLevel, zoffset);
2517 }
2518 else {
2519 /* 2D / cube */
2520 _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
2521 GL_COLOR_ATTACHMENT0_EXT,
2522 faceTarget,
2523 texObj->Name,
2524 dstLevel);
2525 }
2526
2527 _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
2528
2529 /* sanity check */
2530 status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
2531 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2532 abort();
2533 break;
2534 }
2535
2536 assert(dstWidth == ctx->DrawBuffer->Width);
2537 assert(dstHeight == ctx->DrawBuffer->Height);
2538
2539 /* setup viewport */
2540 _mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);
2541
2542 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
2543 }
2544
2545 _mesa_lock_texture(ctx, texObj); /* relock */
2546
2547 _mesa_meta_end(ctx);
2548
2549 _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);
2550 _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);
2551 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
2552 _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
2553 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);
2554 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);
2555 _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, wrapRSave);
2556
2557 _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
2558 }
2559
2560
2561 /**
2562 * Determine the GL data type to use for the temporary image read with
2563 * ReadPixels() and passed to Tex[Sub]Image().
2564 */
2565 static GLenum
2566 get_temp_image_type(struct gl_context *ctx, GLenum baseFormat)
2567 {
2568 switch (baseFormat) {
2569 case GL_RGBA:
2570 case GL_RGB:
2571 case GL_ALPHA:
2572 case GL_LUMINANCE:
2573 case GL_LUMINANCE_ALPHA:
2574 case GL_INTENSITY:
2575 if (ctx->DrawBuffer->Visual.redBits <= 8)
2576 return GL_UNSIGNED_BYTE;
2577 else if (ctx->DrawBuffer->Visual.redBits <= 8)
2578 return GL_UNSIGNED_SHORT;
2579 else
2580 return GL_FLOAT;
2581 case GL_DEPTH_COMPONENT:
2582 return GL_UNSIGNED_INT;
2583 case GL_DEPTH_STENCIL:
2584 return GL_UNSIGNED_INT_24_8;
2585 default:
2586 _mesa_problem(ctx, "Unexpected format in get_temp_image_type()");
2587 return 0;
2588 }
2589 }
2590
2591
2592 /**
2593 * Helper for _mesa_meta_CopyTexImage1/2D() functions.
2594 * Have to be careful with locking and meta state for pixel transfer.
2595 */
2596 static void
2597 copy_tex_image(struct gl_context *ctx, GLuint dims, GLenum target, GLint level,
2598 GLenum internalFormat, GLint x, GLint y,
2599 GLsizei width, GLsizei height, GLint border)
2600 {
2601 struct gl_texture_object *texObj;
2602 struct gl_texture_image *texImage;
2603 GLenum format, type;
2604 GLint bpp;
2605 void *buf;
2606
2607 texObj = _mesa_get_current_tex_object(ctx, target);
2608 texImage = _mesa_get_tex_image(ctx, texObj, target, level);
2609
2610 /* Choose format/type for temporary image buffer */
2611 format = _mesa_base_tex_format(ctx, internalFormat);
2612 type = get_temp_image_type(ctx, format);
2613 bpp = _mesa_bytes_per_pixel(format, type);
2614 if (bpp <= 0) {
2615 _mesa_problem(ctx, "Bad bpp in meta copy_tex_image()");
2616 return;
2617 }
2618
2619 /*
2620 * Alloc image buffer (XXX could use a PBO)
2621 */
2622 buf = malloc(width * height * bpp);
2623 if (!buf) {
2624 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage%uD", dims);
2625 return;
2626 }
2627
2628 _mesa_unlock_texture(ctx, texObj); /* need to unlock first */
2629
2630 /*
2631 * Read image from framebuffer (disable pixel transfer ops)
2632 */
2633 _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
2634 ctx->Driver.ReadPixels(ctx, x, y, width, height,
2635 format, type, &ctx->Pack, buf);
2636 _mesa_meta_end(ctx);
2637
2638 if (texImage->Data) {
2639 ctx->Driver.FreeTexImageData(ctx, texImage);
2640 }
2641
2642 /* The texture's format was already chosen in _mesa_CopyTexImage() */
2643 ASSERT(texImage->TexFormat != MESA_FORMAT_NONE);
2644
2645 /*
2646 * Store texture data (with pixel transfer ops)
2647 */
2648 _mesa_meta_begin(ctx, META_PIXEL_STORE);
2649
2650 _mesa_update_state(ctx); /* to update pixel transfer state */
2651
2652 if (target == GL_TEXTURE_1D) {
2653 ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
2654 width, border, format, type,
2655 buf, &ctx->Unpack, texObj, texImage);
2656 }
2657 else {
2658 ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
2659 width, height, border, format, type,
2660 buf, &ctx->Unpack, texObj, texImage);
2661 }
2662 _mesa_meta_end(ctx);
2663
2664 _mesa_lock_texture(ctx, texObj); /* re-lock */
2665
2666 free(buf);
2667 }
2668
2669
2670 void
2671 _mesa_meta_CopyTexImage1D(struct gl_context *ctx, GLenum target, GLint level,
2672 GLenum internalFormat, GLint x, GLint y,
2673 GLsizei width, GLint border)
2674 {
2675 copy_tex_image(ctx, 1, target, level, internalFormat, x, y,
2676 width, 1, border);
2677 }
2678
2679
2680 void
2681 _mesa_meta_CopyTexImage2D(struct gl_context *ctx, GLenum target, GLint level,
2682 GLenum internalFormat, GLint x, GLint y,
2683 GLsizei width, GLsizei height, GLint border)
2684 {
2685 copy_tex_image(ctx, 2, target, level, internalFormat, x, y,
2686 width, height, border);
2687 }
2688
2689
2690
2691 /**
2692 * Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions.
2693 * Have to be careful with locking and meta state for pixel transfer.
2694 */
2695 static void
2696 copy_tex_sub_image(struct gl_context *ctx,
2697 GLuint dims, GLenum target, GLint level,
2698 GLint xoffset, GLint yoffset, GLint zoffset,
2699 GLint x, GLint y,
2700 GLsizei width, GLsizei height)
2701 {
2702 struct gl_texture_object *texObj;
2703 struct gl_texture_image *texImage;
2704 GLenum format, type;
2705 GLint bpp;
2706 void *buf;
2707
2708 texObj = _mesa_get_current_tex_object(ctx, target);
2709 texImage = _mesa_select_tex_image(ctx, texObj, target, level);
2710
2711 /* Choose format/type for temporary image buffer */
2712 format = _mesa_get_format_base_format(texImage->TexFormat);
2713 type = get_temp_image_type(ctx, format);
2714 bpp = _mesa_bytes_per_pixel(format, type);
2715 if (bpp <= 0) {
2716 _mesa_problem(ctx, "Bad bpp in meta copy_tex_sub_image()");
2717 return;
2718 }
2719
2720 /*
2721 * Alloc image buffer (XXX could use a PBO)
2722 */
2723 buf = malloc(width * height * bpp);
2724 if (!buf) {
2725 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims);
2726 return;
2727 }
2728
2729 _mesa_unlock_texture(ctx, texObj); /* need to unlock first */
2730
2731 /*
2732 * Read image from framebuffer (disable pixel transfer ops)
2733 */
2734 _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
2735 ctx->Driver.ReadPixels(ctx, x, y, width, height,
2736 format, type, &ctx->Pack, buf);
2737 _mesa_meta_end(ctx);
2738
2739 _mesa_update_state(ctx); /* to update pixel transfer state */
2740
2741 /*
2742 * Store texture data (with pixel transfer ops)
2743 */
2744 _mesa_meta_begin(ctx, META_PIXEL_STORE);
2745 if (target == GL_TEXTURE_1D) {
2746 ctx->Driver.TexSubImage1D(ctx, target, level, xoffset,
2747 width, format, type, buf,
2748 &ctx->Unpack, texObj, texImage);
2749 }
2750 else if (target == GL_TEXTURE_3D) {
2751 ctx->Driver.TexSubImage3D(ctx, target, level, xoffset, yoffset, zoffset,
2752 width, height, 1, format, type, buf,
2753 &ctx->Unpack, texObj, texImage);
2754 }
2755 else {
2756 ctx->Driver.TexSubImage2D(ctx, target, level, xoffset, yoffset,
2757 width, height, format, type, buf,
2758 &ctx->Unpack, texObj, texImage);
2759 }
2760 _mesa_meta_end(ctx);
2761
2762 _mesa_lock_texture(ctx, texObj); /* re-lock */
2763
2764 free(buf);
2765 }
2766
2767
2768 void
2769 _mesa_meta_CopyTexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,
2770 GLint xoffset,
2771 GLint x, GLint y, GLsizei width)
2772 {
2773 copy_tex_sub_image(ctx, 1, target, level, xoffset, 0, 0,
2774 x, y, width, 1);
2775 }
2776
2777
2778 void
2779 _mesa_meta_CopyTexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,
2780 GLint xoffset, GLint yoffset,
2781 GLint x, GLint y,
2782 GLsizei width, GLsizei height)
2783 {
2784 copy_tex_sub_image(ctx, 2, target, level, xoffset, yoffset, 0,
2785 x, y, width, height);
2786 }
2787
2788
2789 void
2790 _mesa_meta_CopyTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,
2791 GLint xoffset, GLint yoffset, GLint zoffset,
2792 GLint x, GLint y,
2793 GLsizei width, GLsizei height)
2794 {
2795 copy_tex_sub_image(ctx, 3, target, level, xoffset, yoffset, zoffset,
2796 x, y, width, height);
2797 }
2798
2799
2800 void
2801 _mesa_meta_CopyColorTable(struct gl_context *ctx,
2802 GLenum target, GLenum internalformat,
2803 GLint x, GLint y, GLsizei width)
2804 {
2805 GLfloat *buf;
2806
2807 buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));
2808 if (!buf) {
2809 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorTable");
2810 return;
2811 }
2812
2813 /*
2814 * Read image from framebuffer (disable pixel transfer ops)
2815 */
2816 _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
2817 ctx->Driver.ReadPixels(ctx, x, y, width, 1,
2818 GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
2819
2820 _mesa_ColorTable(target, internalformat, width, GL_RGBA, GL_FLOAT, buf);
2821
2822 _mesa_meta_end(ctx);
2823
2824 free(buf);
2825 }
2826
2827
2828 void
2829 _mesa_meta_CopyColorSubTable(struct gl_context *ctx,GLenum target, GLsizei start,
2830 GLint x, GLint y, GLsizei width)
2831 {
2832 GLfloat *buf;
2833
2834 buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));
2835 if (!buf) {
2836 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorSubTable");
2837 return;
2838 }
2839
2840 /*
2841 * Read image from framebuffer (disable pixel transfer ops)
2842 */
2843 _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
2844 ctx->Driver.ReadPixels(ctx, x, y, width, 1,
2845 GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
2846
2847 _mesa_ColorSubTable(target, start, width, GL_RGBA, GL_FLOAT, buf);
2848
2849 _mesa_meta_end(ctx);
2850
2851 free(buf);
2852 }