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st/mesa: add a second pipeline for compute
[mesa.git] / src / mesa / state_tracker / st_cb_drawpixels.c
1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Brian Paul
31 */
32
33 #include "main/imports.h"
34 #include "main/image.h"
35 #include "main/bufferobj.h"
36 #include "main/blit.h"
37 #include "main/format_pack.h"
38 #include "main/macros.h"
39 #include "main/mtypes.h"
40 #include "main/pack.h"
41 #include "main/pbo.h"
42 #include "main/readpix.h"
43 #include "main/texformat.h"
44 #include "main/teximage.h"
45 #include "main/texstore.h"
46 #include "main/glformats.h"
47 #include "program/program.h"
48 #include "program/prog_print.h"
49 #include "program/prog_instruction.h"
50
51 #include "st_atom.h"
52 #include "st_atom_constbuf.h"
53 #include "st_cb_bitmap.h"
54 #include "st_cb_drawpixels.h"
55 #include "st_cb_readpixels.h"
56 #include "st_cb_fbo.h"
57 #include "st_context.h"
58 #include "st_debug.h"
59 #include "st_format.h"
60 #include "st_program.h"
61 #include "st_texture.h"
62
63 #include "pipe/p_context.h"
64 #include "pipe/p_defines.h"
65 #include "tgsi/tgsi_ureg.h"
66 #include "util/u_draw_quad.h"
67 #include "util/u_format.h"
68 #include "util/u_inlines.h"
69 #include "util/u_math.h"
70 #include "util/u_tile.h"
71 #include "util/u_upload_mgr.h"
72 #include "cso_cache/cso_context.h"
73
74
75 /**
76 * Create fragment program that does a TEX() instruction to get a Z and/or
77 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
78 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
79 * Pass fragment color through as-is.
80 *
81 * \return CSO of the fragment shader.
82 */
83 static void *
84 get_drawpix_z_stencil_program(struct st_context *st,
85 GLboolean write_depth,
86 GLboolean write_stencil)
87 {
88 struct ureg_program *ureg;
89 struct ureg_src depth_sampler, stencil_sampler;
90 struct ureg_src texcoord, color;
91 struct ureg_dst out_color, out_depth, out_stencil;
92 const GLuint shaderIndex = write_depth * 2 + write_stencil;
93 void *cso;
94
95 assert(shaderIndex < ARRAY_SIZE(st->drawpix.zs_shaders));
96
97 if (st->drawpix.zs_shaders[shaderIndex]) {
98 /* already have the proper shader */
99 return st->drawpix.zs_shaders[shaderIndex];
100 }
101
102 ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT);
103 if (ureg == NULL)
104 return NULL;
105
106 ureg_property(ureg, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS, TRUE);
107
108 if (write_depth) {
109 color = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_COLOR, 0,
110 TGSI_INTERPOLATE_COLOR);
111 out_color = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
112
113 depth_sampler = ureg_DECL_sampler(ureg, 0);
114 out_depth = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
115 }
116
117 if (write_stencil) {
118 stencil_sampler = ureg_DECL_sampler(ureg, 1);
119 out_stencil = ureg_DECL_output(ureg, TGSI_SEMANTIC_STENCIL, 0);
120 }
121
122 texcoord = ureg_DECL_fs_input(ureg,
123 st->needs_texcoord_semantic ?
124 TGSI_SEMANTIC_TEXCOORD :
125 TGSI_SEMANTIC_GENERIC,
126 0, TGSI_INTERPOLATE_LINEAR);
127
128 if (write_depth) {
129 ureg_TEX(ureg, ureg_writemask(out_depth, TGSI_WRITEMASK_Z),
130 TGSI_TEXTURE_2D, texcoord, depth_sampler);
131 ureg_MOV(ureg, out_color, color);
132 }
133
134 if (write_stencil)
135 ureg_TEX(ureg, ureg_writemask(out_stencil, TGSI_WRITEMASK_Y),
136 TGSI_TEXTURE_2D, texcoord, stencil_sampler);
137
138 ureg_END(ureg);
139 cso = ureg_create_shader_and_destroy(ureg, st->pipe);
140
141 /* save the new shader */
142 st->drawpix.zs_shaders[shaderIndex] = cso;
143 return cso;
144 }
145
146
147 /**
148 * Create a simple vertex shader that just passes through the
149 * vertex position and texcoord (and optionally, color).
150 */
151 static void *
152 make_passthrough_vertex_shader(struct st_context *st,
153 GLboolean passColor)
154 {
155 const unsigned texcoord_semantic = st->needs_texcoord_semantic ?
156 TGSI_SEMANTIC_TEXCOORD : TGSI_SEMANTIC_GENERIC;
157
158 if (!st->drawpix.vert_shaders[passColor]) {
159 struct ureg_program *ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
160
161 if (ureg == NULL)
162 return NULL;
163
164 /* MOV result.pos, vertex.pos; */
165 ureg_MOV(ureg,
166 ureg_DECL_output( ureg, TGSI_SEMANTIC_POSITION, 0 ),
167 ureg_DECL_vs_input( ureg, 0 ));
168
169 /* MOV result.texcoord0, vertex.attr[1]; */
170 ureg_MOV(ureg,
171 ureg_DECL_output( ureg, texcoord_semantic, 0 ),
172 ureg_DECL_vs_input( ureg, 1 ));
173
174 if (passColor) {
175 /* MOV result.color0, vertex.attr[2]; */
176 ureg_MOV(ureg,
177 ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 ),
178 ureg_DECL_vs_input( ureg, 2 ));
179 }
180
181 ureg_END( ureg );
182
183 st->drawpix.vert_shaders[passColor] =
184 ureg_create_shader_and_destroy( ureg, st->pipe );
185 }
186
187 return st->drawpix.vert_shaders[passColor];
188 }
189
190
191 /**
192 * Return a texture internalFormat for drawing/copying an image
193 * of the given format and type.
194 */
195 static GLenum
196 internal_format(struct gl_context *ctx, GLenum format, GLenum type)
197 {
198 switch (format) {
199 case GL_DEPTH_COMPONENT:
200 switch (type) {
201 case GL_UNSIGNED_SHORT:
202 return GL_DEPTH_COMPONENT16;
203
204 case GL_UNSIGNED_INT:
205 return GL_DEPTH_COMPONENT32;
206
207 case GL_FLOAT:
208 if (ctx->Extensions.ARB_depth_buffer_float)
209 return GL_DEPTH_COMPONENT32F;
210 else
211 return GL_DEPTH_COMPONENT;
212
213 default:
214 return GL_DEPTH_COMPONENT;
215 }
216
217 case GL_DEPTH_STENCIL:
218 switch (type) {
219 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
220 return GL_DEPTH32F_STENCIL8;
221
222 case GL_UNSIGNED_INT_24_8:
223 default:
224 return GL_DEPTH24_STENCIL8;
225 }
226
227 case GL_STENCIL_INDEX:
228 return GL_STENCIL_INDEX;
229
230 default:
231 if (_mesa_is_enum_format_integer(format)) {
232 switch (type) {
233 case GL_BYTE:
234 return GL_RGBA8I;
235 case GL_UNSIGNED_BYTE:
236 return GL_RGBA8UI;
237 case GL_SHORT:
238 return GL_RGBA16I;
239 case GL_UNSIGNED_SHORT:
240 return GL_RGBA16UI;
241 case GL_INT:
242 return GL_RGBA32I;
243 case GL_UNSIGNED_INT:
244 return GL_RGBA32UI;
245 default:
246 assert(0 && "Unexpected type in internal_format()");
247 return GL_RGBA_INTEGER;
248 }
249 }
250 else {
251 switch (type) {
252 case GL_UNSIGNED_BYTE:
253 case GL_UNSIGNED_INT_8_8_8_8:
254 case GL_UNSIGNED_INT_8_8_8_8_REV:
255 default:
256 return GL_RGBA8;
257
258 case GL_UNSIGNED_BYTE_3_3_2:
259 case GL_UNSIGNED_BYTE_2_3_3_REV:
260 return GL_R3_G3_B2;
261
262 case GL_UNSIGNED_SHORT_4_4_4_4:
263 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
264 return GL_RGBA4;
265
266 case GL_UNSIGNED_SHORT_5_6_5:
267 case GL_UNSIGNED_SHORT_5_6_5_REV:
268 return GL_RGB565;
269
270 case GL_UNSIGNED_SHORT_5_5_5_1:
271 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
272 return GL_RGB5_A1;
273
274 case GL_UNSIGNED_INT_10_10_10_2:
275 case GL_UNSIGNED_INT_2_10_10_10_REV:
276 return GL_RGB10_A2;
277
278 case GL_UNSIGNED_SHORT:
279 case GL_UNSIGNED_INT:
280 return GL_RGBA16;
281
282 case GL_BYTE:
283 return
284 ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8;
285
286 case GL_SHORT:
287 case GL_INT:
288 return
289 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
290
291 case GL_HALF_FLOAT_ARB:
292 return
293 ctx->Extensions.ARB_texture_float ? GL_RGBA16F :
294 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
295
296 case GL_FLOAT:
297 case GL_DOUBLE:
298 return
299 ctx->Extensions.ARB_texture_float ? GL_RGBA32F :
300 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
301
302 case GL_UNSIGNED_INT_5_9_9_9_REV:
303 assert(ctx->Extensions.EXT_texture_shared_exponent);
304 return GL_RGB9_E5;
305
306 case GL_UNSIGNED_INT_10F_11F_11F_REV:
307 assert(ctx->Extensions.EXT_packed_float);
308 return GL_R11F_G11F_B10F;
309 }
310 }
311 }
312 }
313
314
315 /**
316 * Create a temporary texture to hold an image of the given size.
317 * If width, height are not POT and the driver only handles POT textures,
318 * allocate the next larger size of texture that is POT.
319 */
320 static struct pipe_resource *
321 alloc_texture(struct st_context *st, GLsizei width, GLsizei height,
322 enum pipe_format texFormat, unsigned bind)
323 {
324 struct pipe_resource *pt;
325
326 pt = st_texture_create(st, st->internal_target, texFormat, 0,
327 width, height, 1, 1, 0, bind);
328
329 return pt;
330 }
331
332
333 /**
334 * Make texture containing an image for glDrawPixels image.
335 * If 'pixels' is NULL, leave the texture image data undefined.
336 */
337 static struct pipe_resource *
338 make_texture(struct st_context *st,
339 GLsizei width, GLsizei height, GLenum format, GLenum type,
340 const struct gl_pixelstore_attrib *unpack,
341 const GLvoid *pixels)
342 {
343 struct gl_context *ctx = st->ctx;
344 struct pipe_context *pipe = st->pipe;
345 mesa_format mformat;
346 struct pipe_resource *pt;
347 enum pipe_format pipeFormat;
348 GLenum baseInternalFormat;
349
350 /* Choose a pixel format for the temp texture which will hold the
351 * image to draw.
352 */
353 pipeFormat = st_choose_matching_format(st, PIPE_BIND_SAMPLER_VIEW,
354 format, type, unpack->SwapBytes);
355
356 if (pipeFormat == PIPE_FORMAT_NONE) {
357 /* Use the generic approach. */
358 GLenum intFormat = internal_format(ctx, format, type);
359
360 pipeFormat = st_choose_format(st, intFormat, format, type,
361 st->internal_target, 0,
362 PIPE_BIND_SAMPLER_VIEW, FALSE);
363 assert(pipeFormat != PIPE_FORMAT_NONE);
364 }
365
366 mformat = st_pipe_format_to_mesa_format(pipeFormat);
367 baseInternalFormat = _mesa_get_format_base_format(mformat);
368
369 pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
370 if (!pixels)
371 return NULL;
372
373 /* alloc temporary texture */
374 pt = alloc_texture(st, width, height, pipeFormat, PIPE_BIND_SAMPLER_VIEW);
375 if (!pt) {
376 _mesa_unmap_pbo_source(ctx, unpack);
377 return NULL;
378 }
379
380 {
381 struct pipe_transfer *transfer;
382 GLboolean success;
383 GLubyte *dest;
384 const GLbitfield imageTransferStateSave = ctx->_ImageTransferState;
385
386 /* we'll do pixel transfer in a fragment shader */
387 ctx->_ImageTransferState = 0x0;
388
389 /* map texture transfer */
390 dest = pipe_transfer_map(pipe, pt, 0, 0,
391 PIPE_TRANSFER_WRITE, 0, 0,
392 width, height, &transfer);
393
394
395 /* Put image into texture transfer.
396 * Note that the image is actually going to be upside down in
397 * the texture. We deal with that with texcoords.
398 */
399 if ((format == GL_RGBA || format == GL_BGRA)
400 && type == GL_UNSIGNED_BYTE) {
401 /* Use a memcpy-based texstore to avoid software pixel swizzling.
402 * We'll do the necessary swizzling with the pipe_sampler_view to
403 * give much better performance.
404 * XXX in the future, expand this to accomodate more format and
405 * type combinations.
406 */
407 _mesa_memcpy_texture(ctx, 2,
408 mformat, /* mesa_format */
409 transfer->stride, /* dstRowStride, bytes */
410 &dest, /* destSlices */
411 width, height, 1, /* size */
412 format, type, /* src format/type */
413 pixels, /* data source */
414 unpack);
415 success = GL_TRUE;
416 }
417 else {
418 success = _mesa_texstore(ctx, 2, /* dims */
419 baseInternalFormat, /* baseInternalFormat */
420 mformat, /* mesa_format */
421 transfer->stride, /* dstRowStride, bytes */
422 &dest, /* destSlices */
423 width, height, 1, /* size */
424 format, type, /* src format/type */
425 pixels, /* data source */
426 unpack);
427 }
428
429 /* unmap */
430 pipe_transfer_unmap(pipe, transfer);
431
432 assert(success);
433
434 /* restore */
435 ctx->_ImageTransferState = imageTransferStateSave;
436 }
437
438 _mesa_unmap_pbo_source(ctx, unpack);
439
440 return pt;
441 }
442
443
444 /**
445 * Draw quad with texcoords and optional color.
446 * Coords are gallium window coords with y=0=top.
447 * \param color may be null
448 * \param invertTex if true, flip texcoords vertically
449 */
450 static void
451 draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z,
452 GLfloat x1, GLfloat y1, const GLfloat *color,
453 GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord)
454 {
455 struct st_context *st = st_context(ctx);
456 struct pipe_context *pipe = st->pipe;
457 GLfloat (*verts)[3][4]; /* four verts, three attribs, XYZW */
458 struct pipe_resource *buf = NULL;
459 unsigned offset;
460
461 u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), 4, &offset,
462 &buf, (void **) &verts);
463 if (!buf) {
464 return;
465 }
466
467 /* setup vertex data */
468 {
469 const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
470 const GLfloat fb_width = (GLfloat) fb->Width;
471 const GLfloat fb_height = (GLfloat) fb->Height;
472 const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f;
473 const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f;
474 const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f;
475 const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f;
476 const GLfloat sLeft = 0.0f, sRight = maxXcoord;
477 const GLfloat tTop = invertTex ? maxYcoord : 0.0f;
478 const GLfloat tBot = invertTex ? 0.0f : maxYcoord;
479 GLuint i;
480
481 /* upper-left */
482 verts[0][0][0] = clip_x0; /* v[0].attr[0].x */
483 verts[0][0][1] = clip_y0; /* v[0].attr[0].y */
484
485 /* upper-right */
486 verts[1][0][0] = clip_x1;
487 verts[1][0][1] = clip_y0;
488
489 /* lower-right */
490 verts[2][0][0] = clip_x1;
491 verts[2][0][1] = clip_y1;
492
493 /* lower-left */
494 verts[3][0][0] = clip_x0;
495 verts[3][0][1] = clip_y1;
496
497 verts[0][1][0] = sLeft; /* v[0].attr[1].S */
498 verts[0][1][1] = tTop; /* v[0].attr[1].T */
499 verts[1][1][0] = sRight;
500 verts[1][1][1] = tTop;
501 verts[2][1][0] = sRight;
502 verts[2][1][1] = tBot;
503 verts[3][1][0] = sLeft;
504 verts[3][1][1] = tBot;
505
506 /* same for all verts: */
507 if (color) {
508 for (i = 0; i < 4; i++) {
509 verts[i][0][2] = z; /* v[i].attr[0].z */
510 verts[i][0][3] = 1.0f; /* v[i].attr[0].w */
511 verts[i][2][0] = color[0]; /* v[i].attr[2].r */
512 verts[i][2][1] = color[1]; /* v[i].attr[2].g */
513 verts[i][2][2] = color[2]; /* v[i].attr[2].b */
514 verts[i][2][3] = color[3]; /* v[i].attr[2].a */
515 verts[i][1][2] = 0.0f; /* v[i].attr[1].R */
516 verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */
517 }
518 }
519 else {
520 for (i = 0; i < 4; i++) {
521 verts[i][0][2] = z; /*Z*/
522 verts[i][0][3] = 1.0f; /*W*/
523 verts[i][1][2] = 0.0f; /*R*/
524 verts[i][1][3] = 1.0f; /*Q*/
525 }
526 }
527 }
528
529 u_upload_unmap(st->uploader);
530 util_draw_vertex_buffer(pipe, st->cso_context, buf,
531 cso_get_aux_vertex_buffer_slot(st->cso_context),
532 offset,
533 PIPE_PRIM_QUADS,
534 4, /* verts */
535 3); /* attribs/vert */
536 pipe_resource_reference(&buf, NULL);
537 }
538
539
540
541 static void
542 draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
543 GLsizei width, GLsizei height,
544 GLfloat zoomX, GLfloat zoomY,
545 struct pipe_sampler_view **sv,
546 int num_sampler_view,
547 void *driver_vp,
548 void *driver_fp,
549 struct st_fp_variant *fpv,
550 const GLfloat *color,
551 GLboolean invertTex,
552 GLboolean write_depth, GLboolean write_stencil)
553 {
554 struct st_context *st = st_context(ctx);
555 struct pipe_context *pipe = st->pipe;
556 struct cso_context *cso = st->cso_context;
557 GLfloat x0, y0, x1, y1;
558 GLsizei maxSize;
559 boolean normalized = sv[0]->texture->target == PIPE_TEXTURE_2D;
560
561 assert(sv[0]->texture->target == st->internal_target);
562
563 /* limit checks */
564 /* XXX if DrawPixels image is larger than max texture size, break
565 * it up into chunks.
566 */
567 maxSize = 1 << (pipe->screen->get_param(pipe->screen,
568 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
569 assert(width <= maxSize);
570 assert(height <= maxSize);
571
572 cso_save_rasterizer(cso);
573 cso_save_viewport(cso);
574 cso_save_fragment_samplers(cso);
575 cso_save_fragment_sampler_views(cso);
576 cso_save_fragment_shader(cso);
577 cso_save_stream_outputs(cso);
578 cso_save_vertex_shader(cso);
579 cso_save_tessctrl_shader(cso);
580 cso_save_tesseval_shader(cso);
581 cso_save_geometry_shader(cso);
582 cso_save_vertex_elements(cso);
583 cso_save_aux_vertex_buffer_slot(cso);
584 if (write_stencil) {
585 cso_save_depth_stencil_alpha(cso);
586 cso_save_blend(cso);
587 }
588
589 /* rasterizer state: just scissor */
590 {
591 struct pipe_rasterizer_state rasterizer;
592 memset(&rasterizer, 0, sizeof(rasterizer));
593 rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader &&
594 ctx->Color._ClampFragmentColor;
595 rasterizer.half_pixel_center = 1;
596 rasterizer.bottom_edge_rule = 1;
597 rasterizer.depth_clip = !ctx->Transform.DepthClamp;
598 rasterizer.scissor = ctx->Scissor.EnableFlags;
599 cso_set_rasterizer(cso, &rasterizer);
600 }
601
602 if (write_stencil) {
603 /* Stencil writing bypasses the normal fragment pipeline to
604 * disable color writing and set stencil test to always pass.
605 */
606 struct pipe_depth_stencil_alpha_state dsa;
607 struct pipe_blend_state blend;
608
609 /* depth/stencil */
610 memset(&dsa, 0, sizeof(dsa));
611 dsa.stencil[0].enabled = 1;
612 dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
613 dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
614 dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
615 if (write_depth) {
616 /* writing depth+stencil: depth test always passes */
617 dsa.depth.enabled = 1;
618 dsa.depth.writemask = ctx->Depth.Mask;
619 dsa.depth.func = PIPE_FUNC_ALWAYS;
620 }
621 cso_set_depth_stencil_alpha(cso, &dsa);
622
623 /* blend (colormask) */
624 memset(&blend, 0, sizeof(blend));
625 cso_set_blend(cso, &blend);
626 }
627
628 /* fragment shader state: TEX lookup program */
629 cso_set_fragment_shader_handle(cso, driver_fp);
630
631 /* vertex shader state: position + texcoord pass-through */
632 cso_set_vertex_shader_handle(cso, driver_vp);
633
634 /* disable other shaders */
635 cso_set_tessctrl_shader_handle(cso, NULL);
636 cso_set_tesseval_shader_handle(cso, NULL);
637 cso_set_geometry_shader_handle(cso, NULL);
638
639 /* user samplers, plus the drawpix samplers */
640 {
641 struct pipe_sampler_state sampler;
642
643 memset(&sampler, 0, sizeof(sampler));
644 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP;
645 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP;
646 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP;
647 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
648 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
649 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
650 sampler.normalized_coords = normalized;
651
652 if (fpv) {
653 /* drawing a color image */
654 const struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
655 uint num = MAX3(fpv->drawpix_sampler + 1,
656 fpv->pixelmap_sampler + 1,
657 st->state.num_samplers[PIPE_SHADER_FRAGMENT]);
658 uint i;
659
660 for (i = 0; i < st->state.num_samplers[PIPE_SHADER_FRAGMENT]; i++)
661 samplers[i] = &st->state.samplers[PIPE_SHADER_FRAGMENT][i];
662
663 samplers[fpv->drawpix_sampler] = &sampler;
664 if (sv[1])
665 samplers[fpv->pixelmap_sampler] = &sampler;
666
667 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num, samplers);
668 } else {
669 /* drawing a depth/stencil image */
670 const struct pipe_sampler_state *samplers[2] = {&sampler, &sampler};
671
672 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, samplers);
673 }
674 }
675
676 /* user textures, plus the drawpix textures */
677 if (fpv) {
678 /* drawing a color image */
679 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
680 uint num = MAX3(fpv->drawpix_sampler + 1,
681 fpv->pixelmap_sampler + 1,
682 st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
683
684 memcpy(sampler_views, st->state.sampler_views[PIPE_SHADER_FRAGMENT],
685 sizeof(sampler_views));
686
687 sampler_views[fpv->drawpix_sampler] = sv[0];
688 if (sv[1])
689 sampler_views[fpv->pixelmap_sampler] = sv[1];
690 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num, sampler_views);
691 } else {
692 /* drawing a depth/stencil image */
693 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv);
694 }
695
696 /* viewport state: viewport matching window dims */
697 {
698 const float w = (float) ctx->DrawBuffer->Width;
699 const float h = (float) ctx->DrawBuffer->Height;
700 struct pipe_viewport_state vp;
701 vp.scale[0] = 0.5f * w;
702 vp.scale[1] = -0.5f * h;
703 vp.scale[2] = 0.5f;
704 vp.translate[0] = 0.5f * w;
705 vp.translate[1] = 0.5f * h;
706 vp.translate[2] = 0.5f;
707 cso_set_viewport(cso, &vp);
708 }
709
710 cso_set_vertex_elements(cso, 3, st->velems_util_draw);
711 cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
712
713 /* Compute Gallium window coords (y=0=top) with pixel zoom.
714 * Recall that these coords are transformed by the current
715 * vertex shader and viewport transformation.
716 */
717 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
718 y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY);
719 invertTex = !invertTex;
720 }
721
722 x0 = (GLfloat) x;
723 x1 = x + width * ctx->Pixel.ZoomX;
724 y0 = (GLfloat) y;
725 y1 = y + height * ctx->Pixel.ZoomY;
726
727 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
728 z = z * 2.0f - 1.0f;
729
730 draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex,
731 normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width,
732 normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height);
733
734 /* restore state */
735 cso_restore_rasterizer(cso);
736 cso_restore_viewport(cso);
737 cso_restore_fragment_samplers(cso);
738 cso_restore_fragment_sampler_views(cso);
739 cso_restore_fragment_shader(cso);
740 cso_restore_vertex_shader(cso);
741 cso_restore_tessctrl_shader(cso);
742 cso_restore_tesseval_shader(cso);
743 cso_restore_geometry_shader(cso);
744 cso_restore_vertex_elements(cso);
745 cso_restore_aux_vertex_buffer_slot(cso);
746 cso_restore_stream_outputs(cso);
747 if (write_stencil) {
748 cso_restore_depth_stencil_alpha(cso);
749 cso_restore_blend(cso);
750 }
751 }
752
753
754 /**
755 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
756 * can't use a fragment shader to write stencil values.
757 */
758 static void
759 draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
760 GLsizei width, GLsizei height, GLenum format, GLenum type,
761 const struct gl_pixelstore_attrib *unpack,
762 const GLvoid *pixels)
763 {
764 struct st_context *st = st_context(ctx);
765 struct pipe_context *pipe = st->pipe;
766 struct st_renderbuffer *strb;
767 enum pipe_transfer_usage usage;
768 struct pipe_transfer *pt;
769 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
770 ubyte *stmap;
771 struct gl_pixelstore_attrib clippedUnpack = *unpack;
772 GLubyte *sValues;
773 GLuint *zValues;
774
775 if (!zoom) {
776 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
777 &clippedUnpack)) {
778 /* totally clipped */
779 return;
780 }
781 }
782
783 strb = st_renderbuffer(ctx->DrawBuffer->
784 Attachment[BUFFER_STENCIL].Renderbuffer);
785
786 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
787 y = ctx->DrawBuffer->Height - y - height;
788 }
789
790 if (format == GL_STENCIL_INDEX &&
791 _mesa_is_format_packed_depth_stencil(strb->Base.Format)) {
792 /* writing stencil to a combined depth+stencil buffer */
793 usage = PIPE_TRANSFER_READ_WRITE;
794 }
795 else {
796 usage = PIPE_TRANSFER_WRITE;
797 }
798
799 stmap = pipe_transfer_map(pipe, strb->texture,
800 strb->surface->u.tex.level,
801 strb->surface->u.tex.first_layer,
802 usage, x, y,
803 width, height, &pt);
804
805 pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels);
806 assert(pixels);
807
808 sValues = malloc(width * sizeof(GLubyte));
809 zValues = malloc(width * sizeof(GLuint));
810
811 if (sValues && zValues) {
812 GLint row;
813 for (row = 0; row < height; row++) {
814 GLfloat *zValuesFloat = (GLfloat*)zValues;
815 GLenum destType = GL_UNSIGNED_BYTE;
816 const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels,
817 width, height,
818 format, type,
819 row, 0);
820 _mesa_unpack_stencil_span(ctx, width, destType, sValues,
821 type, source, &clippedUnpack,
822 ctx->_ImageTransferState);
823
824 if (format == GL_DEPTH_STENCIL) {
825 GLenum ztype =
826 pt->resource->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT ?
827 GL_FLOAT : GL_UNSIGNED_INT;
828
829 _mesa_unpack_depth_span(ctx, width, ztype, zValues,
830 (1 << 24) - 1, type, source,
831 &clippedUnpack);
832 }
833
834 if (zoom) {
835 _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with "
836 "zoom not complete");
837 }
838
839 {
840 GLint spanY;
841
842 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
843 spanY = height - row - 1;
844 }
845 else {
846 spanY = row;
847 }
848
849 /* now pack the stencil (and Z) values in the dest format */
850 switch (pt->resource->format) {
851 case PIPE_FORMAT_S8_UINT:
852 {
853 ubyte *dest = stmap + spanY * pt->stride;
854 assert(usage == PIPE_TRANSFER_WRITE);
855 memcpy(dest, sValues, width);
856 }
857 break;
858 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
859 if (format == GL_DEPTH_STENCIL) {
860 uint *dest = (uint *) (stmap + spanY * pt->stride);
861 GLint k;
862 assert(usage == PIPE_TRANSFER_WRITE);
863 for (k = 0; k < width; k++) {
864 dest[k] = zValues[k] | (sValues[k] << 24);
865 }
866 }
867 else {
868 uint *dest = (uint *) (stmap + spanY * pt->stride);
869 GLint k;
870 assert(usage == PIPE_TRANSFER_READ_WRITE);
871 for (k = 0; k < width; k++) {
872 dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24);
873 }
874 }
875 break;
876 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
877 if (format == GL_DEPTH_STENCIL) {
878 uint *dest = (uint *) (stmap + spanY * pt->stride);
879 GLint k;
880 assert(usage == PIPE_TRANSFER_WRITE);
881 for (k = 0; k < width; k++) {
882 dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff);
883 }
884 }
885 else {
886 uint *dest = (uint *) (stmap + spanY * pt->stride);
887 GLint k;
888 assert(usage == PIPE_TRANSFER_READ_WRITE);
889 for (k = 0; k < width; k++) {
890 dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff);
891 }
892 }
893 break;
894 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
895 if (format == GL_DEPTH_STENCIL) {
896 uint *dest = (uint *) (stmap + spanY * pt->stride);
897 GLfloat *destf = (GLfloat*)dest;
898 GLint k;
899 assert(usage == PIPE_TRANSFER_WRITE);
900 for (k = 0; k < width; k++) {
901 destf[k*2] = zValuesFloat[k];
902 dest[k*2+1] = sValues[k] & 0xff;
903 }
904 }
905 else {
906 uint *dest = (uint *) (stmap + spanY * pt->stride);
907 GLint k;
908 assert(usage == PIPE_TRANSFER_READ_WRITE);
909 for (k = 0; k < width; k++) {
910 dest[k*2+1] = sValues[k] & 0xff;
911 }
912 }
913 break;
914 default:
915 assert(0);
916 }
917 }
918 }
919 }
920 else {
921 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels()");
922 }
923
924 free(sValues);
925 free(zValues);
926
927 _mesa_unmap_pbo_source(ctx, &clippedUnpack);
928
929 /* unmap the stencil buffer */
930 pipe_transfer_unmap(pipe, pt);
931 }
932
933
934 /**
935 * Get fragment program variant for a glDrawPixels or glCopyPixels
936 * command for RGBA data.
937 */
938 static struct st_fp_variant *
939 get_color_fp_variant(struct st_context *st)
940 {
941 struct gl_context *ctx = st->ctx;
942 struct st_fp_variant_key key;
943 struct st_fp_variant *fpv;
944
945 memset(&key, 0, sizeof(key));
946
947 key.st = st->has_shareable_shaders ? NULL : st;
948 key.drawpixels = 1;
949 key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 ||
950 ctx->Pixel.RedScale != 1.0 ||
951 ctx->Pixel.GreenBias != 0.0 ||
952 ctx->Pixel.GreenScale != 1.0 ||
953 ctx->Pixel.BlueBias != 0.0 ||
954 ctx->Pixel.BlueScale != 1.0 ||
955 ctx->Pixel.AlphaBias != 0.0 ||
956 ctx->Pixel.AlphaScale != 1.0);
957 key.pixelMaps = ctx->Pixel.MapColorFlag;
958 key.clamp_color = st->clamp_frag_color_in_shader &&
959 st->ctx->Color._ClampFragmentColor;
960
961 fpv = st_get_fp_variant(st, st->fp, &key);
962
963 return fpv;
964 }
965
966
967 /**
968 * Clamp glDrawPixels width and height to the maximum texture size.
969 */
970 static void
971 clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height,
972 struct gl_pixelstore_attrib *unpack)
973 {
974 const int maxSize =
975 1 << (pipe->screen->get_param(pipe->screen,
976 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
977
978 if (*width > maxSize) {
979 if (unpack->RowLength == 0)
980 unpack->RowLength = *width;
981 *width = maxSize;
982 }
983 if (*height > maxSize) {
984 *height = maxSize;
985 }
986 }
987
988
989 /**
990 * Search the array of 4 swizzle components for the named component and return
991 * its position.
992 */
993 static unsigned
994 search_swizzle(const unsigned char swizzle[4], unsigned component)
995 {
996 unsigned i;
997 for (i = 0; i < 4; i++) {
998 if (swizzle[i] == component)
999 return i;
1000 }
1001 assert(!"search_swizzle() failed");
1002 return 0;
1003 }
1004
1005
1006 /**
1007 * Set the sampler view's swizzle terms. This is used to handle RGBA
1008 * swizzling when the incoming image format isn't an exact match for
1009 * the actual texture format. For example, if we have glDrawPixels(
1010 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1011 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1012 * avoid swizzling all the pixels in software in the texstore code.
1013 */
1014 static void
1015 setup_sampler_swizzle(struct pipe_sampler_view *sv, GLenum format, GLenum type)
1016 {
1017 if ((format == GL_RGBA || format == GL_BGRA) && type == GL_UNSIGNED_BYTE) {
1018 const struct util_format_description *desc =
1019 util_format_description(sv->texture->format);
1020 unsigned c0, c1, c2, c3;
1021
1022 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1023 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1024 */
1025 assert(desc->block.bits == 32);
1026
1027 /* invert the format's swizzle to setup the sampler's swizzle */
1028 if (format == GL_RGBA) {
1029 c0 = UTIL_FORMAT_SWIZZLE_X;
1030 c1 = UTIL_FORMAT_SWIZZLE_Y;
1031 c2 = UTIL_FORMAT_SWIZZLE_Z;
1032 c3 = UTIL_FORMAT_SWIZZLE_W;
1033 }
1034 else {
1035 assert(format == GL_BGRA);
1036 c0 = UTIL_FORMAT_SWIZZLE_Z;
1037 c1 = UTIL_FORMAT_SWIZZLE_Y;
1038 c2 = UTIL_FORMAT_SWIZZLE_X;
1039 c3 = UTIL_FORMAT_SWIZZLE_W;
1040 }
1041 sv->swizzle_r = search_swizzle(desc->swizzle, c0);
1042 sv->swizzle_g = search_swizzle(desc->swizzle, c1);
1043 sv->swizzle_b = search_swizzle(desc->swizzle, c2);
1044 sv->swizzle_a = search_swizzle(desc->swizzle, c3);
1045 }
1046 else {
1047 /* use the default sampler swizzle */
1048 }
1049 }
1050
1051
1052 /**
1053 * Called via ctx->Driver.DrawPixels()
1054 */
1055 static void
1056 st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
1057 GLsizei width, GLsizei height,
1058 GLenum format, GLenum type,
1059 const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
1060 {
1061 void *driver_vp, *driver_fp;
1062 struct st_context *st = st_context(ctx);
1063 const GLfloat *color;
1064 struct pipe_context *pipe = st->pipe;
1065 GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE;
1066 struct pipe_sampler_view *sv[2] = { NULL };
1067 int num_sampler_view = 1;
1068 struct gl_pixelstore_attrib clippedUnpack;
1069 struct st_fp_variant *fpv = NULL;
1070 struct pipe_resource *pt;
1071
1072 /* Mesa state should be up to date by now */
1073 assert(ctx->NewState == 0x0);
1074
1075 st_flush_bitmap_cache(st);
1076
1077 st_validate_state(st, ST_PIPELINE_RENDER);
1078
1079 /* Limit the size of the glDrawPixels to the max texture size.
1080 * Strictly speaking, that's not correct but since we don't handle
1081 * larger images yet, this is better than crashing.
1082 */
1083 clippedUnpack = *unpack;
1084 unpack = &clippedUnpack;
1085 clamp_size(st->pipe, &width, &height, &clippedUnpack);
1086
1087 if (format == GL_DEPTH_STENCIL)
1088 write_stencil = write_depth = GL_TRUE;
1089 else if (format == GL_STENCIL_INDEX)
1090 write_stencil = GL_TRUE;
1091 else if (format == GL_DEPTH_COMPONENT)
1092 write_depth = GL_TRUE;
1093
1094 if (write_stencil &&
1095 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
1096 /* software fallback */
1097 draw_stencil_pixels(ctx, x, y, width, height, format, type,
1098 unpack, pixels);
1099 return;
1100 }
1101
1102 /*
1103 * Get vertex/fragment shaders
1104 */
1105 if (write_depth || write_stencil) {
1106 driver_fp = get_drawpix_z_stencil_program(st, write_depth,
1107 write_stencil);
1108 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
1109 color = ctx->Current.RasterColor;
1110 }
1111 else {
1112 fpv = get_color_fp_variant(st);
1113
1114 driver_fp = fpv->driver_shader;
1115 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
1116
1117 color = NULL;
1118 if (ctx->Pixel.MapColorFlag) {
1119 pipe_sampler_view_reference(&sv[1],
1120 st->pixel_xfer.pixelmap_sampler_view);
1121 num_sampler_view++;
1122 }
1123
1124 /* compiling a new fragment shader variant added new state constants
1125 * into the constant buffer, we need to update them
1126 */
1127 st_upload_constants(st, st->fp->Base.Base.Parameters,
1128 PIPE_SHADER_FRAGMENT);
1129 }
1130
1131 /* Put glDrawPixels image into a texture */
1132 pt = make_texture(st, width, height, format, type, unpack, pixels);
1133 if (!pt) {
1134 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1135 return;
1136 }
1137
1138 /* create sampler view for the image */
1139 sv[0] = st_create_texture_sampler_view(st->pipe, pt);
1140 if (!sv[0]) {
1141 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1142 pipe_resource_reference(&pt, NULL);
1143 return;
1144 }
1145
1146 /* Set up the sampler view's swizzle */
1147 setup_sampler_swizzle(sv[0], format, type);
1148
1149 /* Create a second sampler view to read stencil. The stencil is
1150 * written using the shader stencil export functionality.
1151 */
1152 if (write_stencil) {
1153 enum pipe_format stencil_format =
1154 util_format_stencil_only(pt->format);
1155 /* we should not be doing pixel map/transfer (see above) */
1156 assert(num_sampler_view == 1);
1157 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt,
1158 stencil_format);
1159 if (!sv[1]) {
1160 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1161 pipe_resource_reference(&pt, NULL);
1162 pipe_sampler_view_reference(&sv[0], NULL);
1163 return;
1164 }
1165 num_sampler_view++;
1166 }
1167
1168 draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2],
1169 width, height,
1170 ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1171 sv,
1172 num_sampler_view,
1173 driver_vp,
1174 driver_fp, fpv,
1175 color, GL_FALSE, write_depth, write_stencil);
1176 pipe_sampler_view_reference(&sv[0], NULL);
1177 if (num_sampler_view > 1)
1178 pipe_sampler_view_reference(&sv[1], NULL);
1179
1180 pipe_resource_reference(&pt, NULL);
1181 }
1182
1183
1184
1185 /**
1186 * Software fallback for glCopyPixels(GL_STENCIL).
1187 */
1188 static void
1189 copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1190 GLsizei width, GLsizei height,
1191 GLint dstx, GLint dsty)
1192 {
1193 struct st_renderbuffer *rbDraw;
1194 struct pipe_context *pipe = st_context(ctx)->pipe;
1195 enum pipe_transfer_usage usage;
1196 struct pipe_transfer *ptDraw;
1197 ubyte *drawMap;
1198 ubyte *buffer;
1199 int i;
1200
1201 buffer = malloc(width * height * sizeof(ubyte));
1202 if (!buffer) {
1203 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)");
1204 return;
1205 }
1206
1207 /* Get the dest renderbuffer */
1208 rbDraw = st_renderbuffer(ctx->DrawBuffer->
1209 Attachment[BUFFER_STENCIL].Renderbuffer);
1210
1211 /* this will do stencil pixel transfer ops */
1212 _mesa_readpixels(ctx, srcx, srcy, width, height,
1213 GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
1214 &ctx->DefaultPacking, buffer);
1215
1216 if (0) {
1217 /* debug code: dump stencil values */
1218 GLint row, col;
1219 for (row = 0; row < height; row++) {
1220 printf("%3d: ", row);
1221 for (col = 0; col < width; col++) {
1222 printf("%02x ", buffer[col + row * width]);
1223 }
1224 printf("\n");
1225 }
1226 }
1227
1228 if (_mesa_is_format_packed_depth_stencil(rbDraw->Base.Format))
1229 usage = PIPE_TRANSFER_READ_WRITE;
1230 else
1231 usage = PIPE_TRANSFER_WRITE;
1232
1233 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1234 dsty = rbDraw->Base.Height - dsty - height;
1235 }
1236
1237 assert(util_format_get_blockwidth(rbDraw->texture->format) == 1);
1238 assert(util_format_get_blockheight(rbDraw->texture->format) == 1);
1239
1240 /* map the stencil buffer */
1241 drawMap = pipe_transfer_map(pipe,
1242 rbDraw->texture,
1243 rbDraw->surface->u.tex.level,
1244 rbDraw->surface->u.tex.first_layer,
1245 usage, dstx, dsty,
1246 width, height, &ptDraw);
1247
1248 /* draw */
1249 /* XXX PixelZoom not handled yet */
1250 for (i = 0; i < height; i++) {
1251 ubyte *dst;
1252 const ubyte *src;
1253 int y;
1254
1255 y = i;
1256
1257 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1258 y = height - y - 1;
1259 }
1260
1261 dst = drawMap + y * ptDraw->stride;
1262 src = buffer + i * width;
1263
1264 _mesa_pack_ubyte_stencil_row(rbDraw->Base.Format, width, src, dst);
1265 }
1266
1267 free(buffer);
1268
1269 /* unmap the stencil buffer */
1270 pipe_transfer_unmap(pipe, ptDraw);
1271 }
1272
1273
1274 /**
1275 * Return renderbuffer to use for reading color pixels for glCopyPixels
1276 */
1277 static struct st_renderbuffer *
1278 st_get_color_read_renderbuffer(struct gl_context *ctx)
1279 {
1280 struct gl_framebuffer *fb = ctx->ReadBuffer;
1281 struct st_renderbuffer *strb =
1282 st_renderbuffer(fb->_ColorReadBuffer);
1283
1284 return strb;
1285 }
1286
1287
1288 /**
1289 * Try to do a glCopyPixels for simple cases with a blit by calling
1290 * pipe->blit().
1291 *
1292 * We can do this when we're copying color pixels (depth/stencil
1293 * eventually) with no pixel zoom, no pixel transfer ops, no
1294 * per-fragment ops, and the src/dest regions don't overlap.
1295 */
1296 static GLboolean
1297 blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1298 GLsizei width, GLsizei height,
1299 GLint dstx, GLint dsty, GLenum type)
1300 {
1301 struct st_context *st = st_context(ctx);
1302 struct pipe_context *pipe = st->pipe;
1303 struct pipe_screen *screen = pipe->screen;
1304 struct gl_pixelstore_attrib pack, unpack;
1305 GLint readX, readY, readW, readH, drawX, drawY, drawW, drawH;
1306
1307 if (type == GL_COLOR &&
1308 ctx->Pixel.ZoomX == 1.0 &&
1309 ctx->Pixel.ZoomY == 1.0 &&
1310 ctx->_ImageTransferState == 0x0 &&
1311 !ctx->Color.BlendEnabled &&
1312 !ctx->Color.AlphaEnabled &&
1313 (!ctx->Color.ColorLogicOpEnabled || ctx->Color.LogicOp == GL_COPY) &&
1314 !ctx->Depth.Test &&
1315 !ctx->Fog.Enabled &&
1316 !ctx->Stencil.Enabled &&
1317 !ctx->FragmentProgram.Enabled &&
1318 !ctx->VertexProgram.Enabled &&
1319 !ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT] &&
1320 ctx->DrawBuffer->_NumColorDrawBuffers == 1 &&
1321 !ctx->Query.CondRenderQuery &&
1322 !ctx->Query.CurrentOcclusionObject) {
1323 struct st_renderbuffer *rbRead, *rbDraw;
1324
1325 /*
1326 * Clip the read region against the src buffer bounds.
1327 * We'll still allocate a temporary buffer/texture for the original
1328 * src region size but we'll only read the region which is on-screen.
1329 * This may mean that we draw garbage pixels into the dest region, but
1330 * that's expected.
1331 */
1332 readX = srcx;
1333 readY = srcy;
1334 readW = width;
1335 readH = height;
1336 pack = ctx->DefaultPacking;
1337 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack))
1338 return GL_TRUE; /* all done */
1339
1340 /* clip against dest buffer bounds and scissor box */
1341 drawX = dstx + pack.SkipPixels;
1342 drawY = dsty + pack.SkipRows;
1343 unpack = pack;
1344 if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack))
1345 return GL_TRUE; /* all done */
1346
1347 readX = readX - pack.SkipPixels + unpack.SkipPixels;
1348 readY = readY - pack.SkipRows + unpack.SkipRows;
1349
1350 drawW = readW;
1351 drawH = readH;
1352
1353 rbRead = st_get_color_read_renderbuffer(ctx);
1354 rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
1355
1356 /* Flip src/dst position depending on the orientation of buffers. */
1357 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1358 readY = rbRead->Base.Height - readY;
1359 readH = -readH;
1360 }
1361
1362 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1363 /* We can't flip the destination for pipe->blit, so we only adjust
1364 * its position and flip the source.
1365 */
1366 drawY = rbDraw->Base.Height - drawY - drawH;
1367 readY += readH;
1368 readH = -readH;
1369 }
1370
1371 if (rbRead != rbDraw ||
1372 !_mesa_regions_overlap(readX, readY, readX + readW, readY + readH,
1373 drawX, drawY, drawX + drawW, drawY + drawH)) {
1374 struct pipe_blit_info blit;
1375
1376 memset(&blit, 0, sizeof(blit));
1377 blit.src.resource = rbRead->texture;
1378 blit.src.level = rbRead->surface->u.tex.level;
1379 blit.src.format = rbRead->texture->format;
1380 blit.src.box.x = readX;
1381 blit.src.box.y = readY;
1382 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1383 blit.src.box.width = readW;
1384 blit.src.box.height = readH;
1385 blit.src.box.depth = 1;
1386 blit.dst.resource = rbDraw->texture;
1387 blit.dst.level = rbDraw->surface->u.tex.level;
1388 blit.dst.format = rbDraw->texture->format;
1389 blit.dst.box.x = drawX;
1390 blit.dst.box.y = drawY;
1391 blit.dst.box.z = rbDraw->surface->u.tex.first_layer;
1392 blit.dst.box.width = drawW;
1393 blit.dst.box.height = drawH;
1394 blit.dst.box.depth = 1;
1395 blit.mask = PIPE_MASK_RGBA;
1396 blit.filter = PIPE_TEX_FILTER_NEAREST;
1397
1398 if (screen->is_format_supported(screen, blit.src.format,
1399 blit.src.resource->target,
1400 blit.src.resource->nr_samples,
1401 PIPE_BIND_SAMPLER_VIEW) &&
1402 screen->is_format_supported(screen, blit.dst.format,
1403 blit.dst.resource->target,
1404 blit.dst.resource->nr_samples,
1405 PIPE_BIND_RENDER_TARGET)) {
1406 pipe->blit(pipe, &blit);
1407 return GL_TRUE;
1408 }
1409 }
1410 }
1411
1412 return GL_FALSE;
1413 }
1414
1415
1416 static void
1417 st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1418 GLsizei width, GLsizei height,
1419 GLint dstx, GLint dsty, GLenum type)
1420 {
1421 struct st_context *st = st_context(ctx);
1422 struct pipe_context *pipe = st->pipe;
1423 struct pipe_screen *screen = pipe->screen;
1424 struct st_renderbuffer *rbRead;
1425 void *driver_vp, *driver_fp;
1426 struct pipe_resource *pt;
1427 struct pipe_sampler_view *sv[2] = { NULL };
1428 struct st_fp_variant *fpv = NULL;
1429 int num_sampler_view = 1;
1430 GLfloat *color;
1431 enum pipe_format srcFormat;
1432 unsigned srcBind;
1433 GLboolean invertTex = GL_FALSE;
1434 GLint readX, readY, readW, readH;
1435 struct gl_pixelstore_attrib pack = ctx->DefaultPacking;
1436
1437 st_flush_bitmap_cache(st);
1438
1439 st_validate_state(st, ST_PIPELINE_RENDER);
1440
1441 if (type == GL_DEPTH_STENCIL) {
1442 /* XXX make this more efficient */
1443 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_STENCIL);
1444 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_DEPTH);
1445 return;
1446 }
1447
1448 if (type == GL_STENCIL) {
1449 /* can't use texturing to do stencil */
1450 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
1451 return;
1452 }
1453
1454 if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type))
1455 return;
1456
1457 /*
1458 * The subsequent code implements glCopyPixels by copying the source
1459 * pixels into a temporary texture that's then applied to a textured quad.
1460 * When we draw the textured quad, all the usual per-fragment operations
1461 * are handled.
1462 */
1463
1464
1465 /*
1466 * Get vertex/fragment shaders
1467 */
1468 if (type == GL_COLOR) {
1469 fpv = get_color_fp_variant(st);
1470
1471 rbRead = st_get_color_read_renderbuffer(ctx);
1472 color = NULL;
1473
1474 driver_fp = fpv->driver_shader;
1475 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
1476
1477 if (ctx->Pixel.MapColorFlag) {
1478 pipe_sampler_view_reference(&sv[1],
1479 st->pixel_xfer.pixelmap_sampler_view);
1480 num_sampler_view++;
1481 }
1482
1483 /* compiling a new fragment shader variant added new state constants
1484 * into the constant buffer, we need to update them
1485 */
1486 st_upload_constants(st, st->fp->Base.Base.Parameters,
1487 PIPE_SHADER_FRAGMENT);
1488 }
1489 else {
1490 assert(type == GL_DEPTH);
1491 rbRead = st_renderbuffer(ctx->ReadBuffer->
1492 Attachment[BUFFER_DEPTH].Renderbuffer);
1493 color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
1494
1495 driver_fp = get_drawpix_z_stencil_program(st, GL_TRUE, GL_FALSE);
1496 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
1497 }
1498
1499 /* Choose the format for the temporary texture. */
1500 srcFormat = rbRead->texture->format;
1501 srcBind = PIPE_BIND_SAMPLER_VIEW |
1502 (type == GL_COLOR ? PIPE_BIND_RENDER_TARGET : PIPE_BIND_DEPTH_STENCIL);
1503
1504 if (!screen->is_format_supported(screen, srcFormat, st->internal_target, 0,
1505 srcBind)) {
1506 /* srcFormat is non-renderable. Find a compatible renderable format. */
1507 if (type == GL_DEPTH) {
1508 srcFormat = st_choose_format(st, GL_DEPTH_COMPONENT, GL_NONE,
1509 GL_NONE, st->internal_target, 0,
1510 srcBind, FALSE);
1511 }
1512 else {
1513 assert(type == GL_COLOR);
1514
1515 if (util_format_is_float(srcFormat)) {
1516 srcFormat = st_choose_format(st, GL_RGBA32F, GL_NONE,
1517 GL_NONE, st->internal_target, 0,
1518 srcBind, FALSE);
1519 }
1520 else if (util_format_is_pure_sint(srcFormat)) {
1521 srcFormat = st_choose_format(st, GL_RGBA32I, GL_NONE,
1522 GL_NONE, st->internal_target, 0,
1523 srcBind, FALSE);
1524 }
1525 else if (util_format_is_pure_uint(srcFormat)) {
1526 srcFormat = st_choose_format(st, GL_RGBA32UI, GL_NONE,
1527 GL_NONE, st->internal_target, 0,
1528 srcBind, FALSE);
1529 }
1530 else if (util_format_is_snorm(srcFormat)) {
1531 srcFormat = st_choose_format(st, GL_RGBA16_SNORM, GL_NONE,
1532 GL_NONE, st->internal_target, 0,
1533 srcBind, FALSE);
1534 }
1535 else {
1536 srcFormat = st_choose_format(st, GL_RGBA, GL_NONE,
1537 GL_NONE, st->internal_target, 0,
1538 srcBind, FALSE);
1539 }
1540 }
1541
1542 if (srcFormat == PIPE_FORMAT_NONE) {
1543 assert(0 && "cannot choose a format for src of CopyPixels");
1544 return;
1545 }
1546 }
1547
1548 /* Invert src region if needed */
1549 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1550 srcy = ctx->ReadBuffer->Height - srcy - height;
1551 invertTex = !invertTex;
1552 }
1553
1554 /* Clip the read region against the src buffer bounds.
1555 * We'll still allocate a temporary buffer/texture for the original
1556 * src region size but we'll only read the region which is on-screen.
1557 * This may mean that we draw garbage pixels into the dest region, but
1558 * that's expected.
1559 */
1560 readX = srcx;
1561 readY = srcy;
1562 readW = width;
1563 readH = height;
1564 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) {
1565 /* The source region is completely out of bounds. Do nothing.
1566 * The GL spec says "Results of copies from outside the window,
1567 * or from regions of the window that are not exposed, are
1568 * hardware dependent and undefined."
1569 */
1570 return;
1571 }
1572
1573 readW = MAX2(0, readW);
1574 readH = MAX2(0, readH);
1575
1576 /* Allocate the temporary texture. */
1577 pt = alloc_texture(st, width, height, srcFormat, srcBind);
1578 if (!pt)
1579 return;
1580
1581 sv[0] = st_create_texture_sampler_view(st->pipe, pt);
1582 if (!sv[0]) {
1583 pipe_resource_reference(&pt, NULL);
1584 return;
1585 }
1586
1587 /* Copy the src region to the temporary texture. */
1588 {
1589 struct pipe_blit_info blit;
1590
1591 memset(&blit, 0, sizeof(blit));
1592 blit.src.resource = rbRead->texture;
1593 blit.src.level = rbRead->surface->u.tex.level;
1594 blit.src.format = rbRead->texture->format;
1595 blit.src.box.x = readX;
1596 blit.src.box.y = readY;
1597 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1598 blit.src.box.width = readW;
1599 blit.src.box.height = readH;
1600 blit.src.box.depth = 1;
1601 blit.dst.resource = pt;
1602 blit.dst.level = 0;
1603 blit.dst.format = pt->format;
1604 blit.dst.box.x = pack.SkipPixels;
1605 blit.dst.box.y = pack.SkipRows;
1606 blit.dst.box.z = 0;
1607 blit.dst.box.width = readW;
1608 blit.dst.box.height = readH;
1609 blit.dst.box.depth = 1;
1610 blit.mask = util_format_get_mask(pt->format) & ~PIPE_MASK_S;
1611 blit.filter = PIPE_TEX_FILTER_NEAREST;
1612
1613 pipe->blit(pipe, &blit);
1614 }
1615
1616 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1617 * textured quad with that texture.
1618 */
1619 draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
1620 width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1621 sv,
1622 num_sampler_view,
1623 driver_vp,
1624 driver_fp, fpv,
1625 color, invertTex, GL_FALSE, GL_FALSE);
1626
1627 pipe_resource_reference(&pt, NULL);
1628 pipe_sampler_view_reference(&sv[0], NULL);
1629 }
1630
1631
1632
1633 void st_init_drawpixels_functions(struct dd_function_table *functions)
1634 {
1635 functions->DrawPixels = st_DrawPixels;
1636 functions->CopyPixels = st_CopyPixels;
1637 }
1638
1639
1640 void
1641 st_destroy_drawpix(struct st_context *st)
1642 {
1643 GLuint i;
1644
1645 for (i = 0; i < ARRAY_SIZE(st->drawpix.zs_shaders); i++) {
1646 if (st->drawpix.zs_shaders[i])
1647 cso_delete_fragment_shader(st->cso_context,
1648 st->drawpix.zs_shaders[i]);
1649 }
1650
1651 if (st->drawpix.vert_shaders[0])
1652 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[0]);
1653 if (st->drawpix.vert_shaders[1])
1654 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[1]);
1655 }