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/errors.h"
34
35 #include "main/image.h"
36 #include "main/bufferobj.h"
37 #include "main/blit.h"
38 #include "main/format_pack.h"
39 #include "main/framebuffer.h"
40 #include "main/macros.h"
41 #include "main/mtypes.h"
42 #include "main/pack.h"
43 #include "main/pbo.h"
44 #include "main/readpix.h"
45 #include "main/state.h"
46 #include "main/texformat.h"
47 #include "main/teximage.h"
48 #include "main/texstore.h"
49 #include "main/glformats.h"
50 #include "program/program.h"
51 #include "program/prog_print.h"
52 #include "program/prog_instruction.h"
53
54 #include "st_atom.h"
55 #include "st_atom_constbuf.h"
56 #include "st_cb_bitmap.h"
57 #include "st_cb_drawpixels.h"
58 #include "st_cb_readpixels.h"
59 #include "st_cb_fbo.h"
60 #include "st_context.h"
61 #include "st_debug.h"
62 #include "st_draw.h"
63 #include "st_format.h"
64 #include "st_program.h"
65 #include "st_sampler_view.h"
66 #include "st_scissor.h"
67 #include "st_texture.h"
68 #include "st_util.h"
69 #include "st_nir.h"
70
71 #include "pipe/p_context.h"
72 #include "pipe/p_defines.h"
73 #include "tgsi/tgsi_ureg.h"
74 #include "util/format/u_format.h"
75 #include "util/u_inlines.h"
76 #include "util/u_math.h"
77 #include "util/u_simple_shaders.h"
78 #include "util/u_tile.h"
79 #include "cso_cache/cso_context.h"
80
81 #include "compiler/nir/nir_builder.h"
82
83 /**
84 * We have a simple glDrawPixels cache to try to optimize the case where the
85 * same image is drawn over and over again. It basically works as follows:
86 *
87 * 1. After we construct a texture map with the image and draw it, we do
88 * not discard the texture. We keep it around, plus we note the
89 * glDrawPixels width, height, format, etc. parameters and keep a copy
90 * of the image in a malloc'd buffer.
91 *
92 * 2. On the next glDrawPixels we check if the parameters match the previous
93 * call. If those match, we check if the image matches the previous image
94 * via a memcmp() call. If everything matches, we re-use the previous
95 * texture, thereby avoiding the cost creating a new texture and copying
96 * the image to it.
97 *
98 * The effectiveness of this cache depends upon:
99 * 1. If the memcmp() finds a difference, it happens relatively quickly.
100 Hopefully, not just the last pixels differ!
101 * 2. If the memcmp() finds no difference, doing that check is faster than
102 * creating and loading a texture.
103 *
104 * Notes:
105 * 1. We don't support any pixel unpacking parameters.
106 * 2. We don't try to cache images in Pixel Buffer Objects.
107 * 3. Instead of saving the whole image, perhaps some sort of reliable
108 * checksum function could be used instead.
109 */
110 #define USE_DRAWPIXELS_CACHE 1
111
112 static nir_ssa_def *
sample_via_nir(nir_builder * b,nir_variable * texcoord,const char * name,int sampler,enum glsl_base_type base_type,nir_alu_type alu_type)113 sample_via_nir(nir_builder *b, nir_variable *texcoord,
114 const char *name, int sampler, enum glsl_base_type base_type,
115 nir_alu_type alu_type)
116 {
117 const struct glsl_type *sampler2D =
118 glsl_sampler_type(GLSL_SAMPLER_DIM_2D, false, false, base_type);
119
120 nir_variable *var =
121 nir_variable_create(b->shader, nir_var_uniform, sampler2D, name);
122 var->data.binding = sampler;
123 var->data.explicit_binding = true;
124
125 nir_deref_instr *deref = nir_build_deref_var(b, var);
126
127 nir_tex_instr *tex = nir_tex_instr_create(b->shader, 3);
128 tex->op = nir_texop_tex;
129 tex->sampler_dim = GLSL_SAMPLER_DIM_2D;
130 tex->coord_components = 2;
131 tex->dest_type = alu_type;
132 tex->src[0].src_type = nir_tex_src_texture_deref;
133 tex->src[0].src = nir_src_for_ssa(&deref->dest.ssa);
134 tex->src[1].src_type = nir_tex_src_sampler_deref;
135 tex->src[1].src = nir_src_for_ssa(&deref->dest.ssa);
136 tex->src[2].src_type = nir_tex_src_coord;
137 tex->src[2].src =
138 nir_src_for_ssa(nir_channels(b, nir_load_var(b, texcoord),
139 (1 << tex->coord_components) - 1));
140
141 nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
142 nir_builder_instr_insert(b, &tex->instr);
143 return nir_channel(b, &tex->dest.ssa, 0);
144 }
145
146 static void *
make_drawpix_z_stencil_program_nir(struct st_context * st,bool write_depth,bool write_stencil)147 make_drawpix_z_stencil_program_nir(struct st_context *st,
148 bool write_depth,
149 bool write_stencil)
150 {
151 struct nir_builder b;
152 const nir_shader_compiler_options *options =
153 st_get_nir_compiler_options(st, MESA_SHADER_FRAGMENT);
154
155 nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, options);
156
157 nir_variable *texcoord =
158 nir_variable_create(b.shader, nir_var_shader_in, glsl_vec_type(2),
159 "texcoord");
160 texcoord->data.location = VARYING_SLOT_TEX0;
161
162 if (write_depth) {
163 nir_variable *out =
164 nir_variable_create(b.shader, nir_var_shader_out, glsl_float_type(),
165 "gl_FragDepth");
166 out->data.location = FRAG_RESULT_DEPTH;
167 nir_ssa_def *depth = sample_via_nir(&b, texcoord, "depth", 0,
168 GLSL_TYPE_FLOAT, nir_type_float);
169 nir_store_var(&b, out, depth, 0x1);
170
171 /* Also copy color */
172 nir_variable *color_in =
173 nir_variable_create(b.shader, nir_var_shader_in, glsl_vec_type(4),
174 "v_color");
175 color_in->data.location = VARYING_SLOT_COL0;
176
177 nir_variable *color_out =
178 nir_variable_create(b.shader, nir_var_shader_out, glsl_vec_type(4),
179 "gl_FragColor");
180 color_out->data.location = FRAG_RESULT_COLOR;
181 nir_copy_var(&b, color_out, color_in);
182 }
183
184 if (write_stencil) {
185 nir_variable *out =
186 nir_variable_create(b.shader, nir_var_shader_out, glsl_uint_type(),
187 "gl_FragStencilRefARB");
188 out->data.location = FRAG_RESULT_STENCIL;
189 nir_ssa_def *stencil = sample_via_nir(&b, texcoord, "stencil", 1,
190 GLSL_TYPE_UINT, nir_type_uint);
191 nir_store_var(&b, out, stencil, 0x1);
192 }
193
194 char name[14];
195 snprintf(name, 14, "drawpixels %s%s",
196 write_depth ? "Z" : "", write_stencil ? "S" : "");
197
198 return st_nir_finish_builtin_shader(st, b.shader, name);
199 }
200
201 static void *
make_drawpix_zs_to_color_program_nir(struct st_context * st,bool rgba)202 make_drawpix_zs_to_color_program_nir(struct st_context *st,
203 bool rgba)
204 {
205 struct nir_builder b;
206 const nir_shader_compiler_options *options =
207 st_get_nir_compiler_options(st, MESA_SHADER_FRAGMENT);
208
209 nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, options);
210
211 nir_variable *texcoord =
212 nir_variable_create(b.shader, nir_var_shader_in, glsl_vec_type(2),
213 "texcoord");
214 texcoord->data.location = VARYING_SLOT_TEX0;
215
216 /* Sample depth and stencil */
217 nir_ssa_def *depth = sample_via_nir(&b, texcoord, "depth", 0,
218 GLSL_TYPE_FLOAT, nir_type_float);
219 nir_ssa_def *stencil = sample_via_nir(&b, texcoord, "stencil", 1,
220 GLSL_TYPE_UINT, nir_type_uint);
221
222 /* Create the variable to store the output color */
223 nir_variable *color_out =
224 nir_variable_create(b.shader, nir_var_shader_out, glsl_vec_type(4),
225 "make_drawpix_zs_to_color_program_nirgl_FragColor");
226 color_out->data.location = FRAG_RESULT_COLOR;
227
228 nir_ssa_def *shifted_depth = nir_fmul(&b,nir_f2f64(&b, depth), nir_imm_double(&b,0xffffff));
229 nir_ssa_def *int_depth = nir_f2u32(&b,shifted_depth);
230
231 nir_ssa_def *ds[4];
232 ds[0] = nir_ubitfield_extract(&b, stencil, nir_imm_int(&b, 0), nir_imm_int(&b,8));
233 ds[1] = nir_ubitfield_extract(&b, int_depth, nir_imm_int(&b, 0), nir_imm_int(&b,8));
234 ds[2] = nir_ubitfield_extract(&b, int_depth, nir_imm_int(&b, 8), nir_imm_int(&b,8));
235 ds[3] = nir_ubitfield_extract(&b, int_depth, nir_imm_int(&b, 16), nir_imm_int(&b,8));
236
237 nir_ssa_def *ds_comp[4];
238 ds_comp[0] = nir_fsat(&b, nir_fmul_imm(&b, nir_u2f32(&b, ds[3]), 1.0/255.0));
239 ds_comp[1] = nir_fsat(&b, nir_fmul_imm(&b, nir_u2f32(&b, ds[2]), 1.0/255.0));
240 ds_comp[2] = nir_fsat(&b, nir_fmul_imm(&b, nir_u2f32(&b, ds[1]), 1.0/255.0));
241 ds_comp[3] = nir_fsat(&b, nir_fmul_imm(&b, nir_u2f32(&b, ds[0]), 1.0/255.0));
242
243 nir_ssa_def *unpacked_ds = nir_vec4(&b, ds_comp[0], ds_comp[1], ds_comp[2], ds_comp[3]);
244
245 if (rgba) {
246 nir_store_var(&b, color_out, unpacked_ds, 0xf);
247 }
248 else {
249 unsigned zyxw[4] = { 2, 1, 0, 3 };
250 nir_ssa_def *swizzled_ds= nir_swizzle(&b, unpacked_ds, zyxw, 4);
251 nir_store_var(&b, color_out, swizzled_ds, 0xf);
252 }
253
254 char name[17];
255 snprintf(name, 17, "copypixels ZStoC");
256
257 return st_nir_finish_builtin_shader(st, b.shader, name);
258 }
259
260
261 /**
262 * Create fragment program that does a TEX() instruction to get a Z and/or
263 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
264 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
265 * Pass fragment color through as-is.
266 *
267 * \return CSO of the fragment shader.
268 */
269 static void *
get_drawpix_z_stencil_program(struct st_context * st,bool write_depth,bool write_stencil)270 get_drawpix_z_stencil_program(struct st_context *st,
271 bool write_depth,
272 bool write_stencil)
273 {
274 const GLuint shaderIndex = write_depth * 2 + write_stencil;
275 void *cso;
276
277 assert(shaderIndex < ARRAY_SIZE(st->drawpix.zs_shaders));
278
279 if (st->drawpix.zs_shaders[shaderIndex]) {
280 /* already have the proper shader */
281 return st->drawpix.zs_shaders[shaderIndex];
282 }
283
284 cso = make_drawpix_z_stencil_program_nir(st, write_depth, write_stencil);
285
286 /* save the new shader */
287 st->drawpix.zs_shaders[shaderIndex] = cso;
288 return cso;
289 }
290
291 /**
292 * Create fragment program that does a TEX() instruction to get a Z and
293 * stencil value value, then writes to FRAG_RESULT_COLOR.
294 * Used for glCopyPixels(GL_DEPTH_STENCIL_TO_RGBA_NV / GL_DEPTH_STENCIL_TO_BGRA_NV).
295 *
296 * \return CSO of the fragment shader.
297 */
298 static void *
get_drawpix_zs_to_color_program(struct st_context * st,bool rgba)299 get_drawpix_zs_to_color_program(struct st_context *st,
300 bool rgba)
301 {
302 void *cso;
303 GLuint shaderIndex;
304
305 if (rgba)
306 shaderIndex = 4;
307 else
308 shaderIndex = 5;
309
310 assert(shaderIndex < ARRAY_SIZE(st->drawpix.zs_shaders));
311
312 if (st->drawpix.zs_shaders[shaderIndex]) {
313 /* already have the proper shader */
314 return st->drawpix.zs_shaders[shaderIndex];
315 }
316
317 cso = make_drawpix_zs_to_color_program_nir(st, rgba);
318
319 /* save the new shader */
320 st->drawpix.zs_shaders[shaderIndex] = cso;
321 return cso;
322 }
323
324 /**
325 * Create a simple vertex shader that just passes through the
326 * vertex position, texcoord, and color.
327 */
328 void
st_make_passthrough_vertex_shader(struct st_context * st)329 st_make_passthrough_vertex_shader(struct st_context *st)
330 {
331 if (st->passthrough_vs)
332 return;
333
334 unsigned inputs[] =
335 { VERT_ATTRIB_POS, VERT_ATTRIB_COLOR0, VERT_ATTRIB_GENERIC0 };
336 unsigned outputs[] =
337 { VARYING_SLOT_POS, VARYING_SLOT_COL0, VARYING_SLOT_TEX0 };
338
339 st->passthrough_vs =
340 st_nir_make_passthrough_shader(st, "drawpixels VS",
341 MESA_SHADER_VERTEX, 3,
342 inputs, outputs, NULL, 0);
343 }
344
345
346 /**
347 * Return a texture internalFormat for drawing/copying an image
348 * of the given format and type.
349 */
350 static GLenum
internal_format(struct gl_context * ctx,GLenum format,GLenum type)351 internal_format(struct gl_context *ctx, GLenum format, GLenum type)
352 {
353 switch (format) {
354 case GL_DEPTH_COMPONENT:
355 switch (type) {
356 case GL_UNSIGNED_SHORT:
357 return GL_DEPTH_COMPONENT16;
358
359 case GL_UNSIGNED_INT:
360 return GL_DEPTH_COMPONENT32;
361
362 case GL_FLOAT:
363 if (ctx->Extensions.ARB_depth_buffer_float)
364 return GL_DEPTH_COMPONENT32F;
365 else
366 return GL_DEPTH_COMPONENT;
367
368 default:
369 return GL_DEPTH_COMPONENT;
370 }
371
372 case GL_DEPTH_STENCIL:
373 switch (type) {
374 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
375 return GL_DEPTH32F_STENCIL8;
376
377 case GL_UNSIGNED_INT_24_8:
378 default:
379 return GL_DEPTH24_STENCIL8;
380 }
381
382 case GL_STENCIL_INDEX:
383 return GL_STENCIL_INDEX;
384
385 default:
386 if (_mesa_is_enum_format_integer(format)) {
387 switch (type) {
388 case GL_BYTE:
389 return GL_RGBA8I;
390 case GL_UNSIGNED_BYTE:
391 return GL_RGBA8UI;
392 case GL_SHORT:
393 return GL_RGBA16I;
394 case GL_UNSIGNED_SHORT:
395 return GL_RGBA16UI;
396 case GL_INT:
397 return GL_RGBA32I;
398 case GL_UNSIGNED_INT:
399 return GL_RGBA32UI;
400 default:
401 assert(0 && "Unexpected type in internal_format()");
402 return GL_RGBA_INTEGER;
403 }
404 }
405 else {
406 switch (type) {
407 case GL_UNSIGNED_BYTE:
408 case GL_UNSIGNED_INT_8_8_8_8:
409 case GL_UNSIGNED_INT_8_8_8_8_REV:
410 default:
411 return GL_RGBA8;
412
413 case GL_UNSIGNED_BYTE_3_3_2:
414 case GL_UNSIGNED_BYTE_2_3_3_REV:
415 return GL_R3_G3_B2;
416
417 case GL_UNSIGNED_SHORT_4_4_4_4:
418 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
419 return GL_RGBA4;
420
421 case GL_UNSIGNED_SHORT_5_6_5:
422 case GL_UNSIGNED_SHORT_5_6_5_REV:
423 return GL_RGB565;
424
425 case GL_UNSIGNED_SHORT_5_5_5_1:
426 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
427 return GL_RGB5_A1;
428
429 case GL_UNSIGNED_INT_10_10_10_2:
430 case GL_UNSIGNED_INT_2_10_10_10_REV:
431 return GL_RGB10_A2;
432
433 case GL_UNSIGNED_SHORT:
434 case GL_UNSIGNED_INT:
435 return GL_RGBA16;
436
437 case GL_BYTE:
438 return
439 ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8;
440
441 case GL_SHORT:
442 case GL_INT:
443 return
444 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
445
446 case GL_HALF_FLOAT_ARB:
447 return
448 ctx->Extensions.ARB_texture_float ? GL_RGBA16F :
449 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
450
451 case GL_FLOAT:
452 case GL_DOUBLE:
453 return
454 ctx->Extensions.ARB_texture_float ? GL_RGBA32F :
455 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16;
456
457 case GL_UNSIGNED_INT_5_9_9_9_REV:
458 assert(ctx->Extensions.EXT_texture_shared_exponent);
459 return GL_RGB9_E5;
460
461 case GL_UNSIGNED_INT_10F_11F_11F_REV:
462 assert(ctx->Extensions.EXT_packed_float);
463 return GL_R11F_G11F_B10F;
464 }
465 }
466 }
467 }
468
469
470 /**
471 * Create a temporary texture to hold an image of the given size.
472 * If width, height are not POT and the driver only handles POT textures,
473 * allocate the next larger size of texture that is POT.
474 */
475 static struct pipe_resource *
alloc_texture(struct st_context * st,GLsizei width,GLsizei height,enum pipe_format texFormat,unsigned bind)476 alloc_texture(struct st_context *st, GLsizei width, GLsizei height,
477 enum pipe_format texFormat, unsigned bind)
478 {
479 struct pipe_resource *pt;
480
481 pt = st_texture_create(st, st->internal_target, texFormat, 0,
482 width, height, 1, 1, 0, bind);
483
484 return pt;
485 }
486
487
488 /**
489 * Search the cache for an image which matches the given parameters.
490 * \return pipe_resource pointer if found, NULL if not found.
491 */
492 static struct pipe_resource *
search_drawpixels_cache(struct st_context * st,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const void * pixels)493 search_drawpixels_cache(struct st_context *st,
494 GLsizei width, GLsizei height,
495 GLenum format, GLenum type,
496 const struct gl_pixelstore_attrib *unpack,
497 const void *pixels)
498 {
499 struct pipe_resource *pt = NULL;
500 const GLint bpp = _mesa_bytes_per_pixel(format, type);
501 unsigned i;
502
503 if ((unpack->RowLength != 0 && unpack->RowLength != width) ||
504 unpack->SkipPixels != 0 ||
505 unpack->SkipRows != 0 ||
506 unpack->SwapBytes ||
507 unpack->BufferObj) {
508 /* we don't allow non-default pixel unpacking values */
509 return NULL;
510 }
511
512 /* Search cache entries for a match */
513 for (i = 0; i < ARRAY_SIZE(st->drawpix_cache.entries); i++) {
514 struct drawpix_cache_entry *entry = &st->drawpix_cache.entries[i];
515
516 if (width == entry->width &&
517 height == entry->height &&
518 format == entry->format &&
519 type == entry->type &&
520 pixels == entry->user_pointer &&
521 entry->image) {
522 assert(entry->texture);
523
524 /* check if the pixel data is the same */
525 if (memcmp(pixels, entry->image, width * height * bpp) == 0) {
526 /* Success - found a cache match */
527 pipe_resource_reference(&pt, entry->texture);
528 /* refcount of returned texture should be at least two here. One
529 * reference for the cache to hold on to, one for the caller (which
530 * it will release), and possibly more held by the driver.
531 */
532 assert(pt->reference.count >= 2);
533
534 /* update the age of this entry */
535 entry->age = ++st->drawpix_cache.age;
536
537 return pt;
538 }
539 }
540 }
541
542 /* no cache match found */
543 return NULL;
544 }
545
546
547 /**
548 * Find the oldest entry in the glDrawPixels cache. We'll replace this
549 * one when we need to store a new image.
550 */
551 static struct drawpix_cache_entry *
find_oldest_drawpixels_cache_entry(struct st_context * st)552 find_oldest_drawpixels_cache_entry(struct st_context *st)
553 {
554 unsigned oldest_age = ~0u, oldest_index = ~0u;
555 unsigned i;
556
557 /* Find entry with oldest (lowest) age */
558 for (i = 0; i < ARRAY_SIZE(st->drawpix_cache.entries); i++) {
559 const struct drawpix_cache_entry *entry = &st->drawpix_cache.entries[i];
560 if (entry->age < oldest_age) {
561 oldest_age = entry->age;
562 oldest_index = i;
563 }
564 }
565
566 assert(oldest_index != ~0u);
567
568 return &st->drawpix_cache.entries[oldest_index];
569 }
570
571
572 /**
573 * Try to save the given glDrawPixels image in the cache.
574 */
575 static void
cache_drawpixels_image(struct st_context * st,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const void * pixels,struct pipe_resource * pt)576 cache_drawpixels_image(struct st_context *st,
577 GLsizei width, GLsizei height,
578 GLenum format, GLenum type,
579 const struct gl_pixelstore_attrib *unpack,
580 const void *pixels,
581 struct pipe_resource *pt)
582 {
583 if ((unpack->RowLength == 0 || unpack->RowLength == width) &&
584 unpack->SkipPixels == 0 &&
585 unpack->SkipRows == 0) {
586 const GLint bpp = _mesa_bytes_per_pixel(format, type);
587 struct drawpix_cache_entry *entry =
588 find_oldest_drawpixels_cache_entry(st);
589 assert(entry);
590 entry->width = width;
591 entry->height = height;
592 entry->format = format;
593 entry->type = type;
594 entry->user_pointer = pixels;
595 free(entry->image);
596 entry->image = malloc(width * height * bpp);
597 if (entry->image) {
598 memcpy(entry->image, pixels, width * height * bpp);
599 pipe_resource_reference(&entry->texture, pt);
600 entry->age = ++st->drawpix_cache.age;
601 }
602 else {
603 /* out of memory, free/disable cached texture */
604 entry->width = 0;
605 entry->height = 0;
606 pipe_resource_reference(&entry->texture, NULL);
607 }
608 }
609 }
610
611
612 /**
613 * Make texture containing an image for glDrawPixels image.
614 * If 'pixels' is NULL, leave the texture image data undefined.
615 */
616 static struct pipe_resource *
make_texture(struct st_context * st,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const void * pixels)617 make_texture(struct st_context *st,
618 GLsizei width, GLsizei height, GLenum format, GLenum type,
619 const struct gl_pixelstore_attrib *unpack,
620 const void *pixels)
621 {
622 struct gl_context *ctx = st->ctx;
623 struct pipe_context *pipe = st->pipe;
624 mesa_format mformat;
625 struct pipe_resource *pt = NULL;
626 enum pipe_format pipeFormat;
627 GLenum baseInternalFormat;
628
629 #if USE_DRAWPIXELS_CACHE
630 pt = search_drawpixels_cache(st, width, height, format, type,
631 unpack, pixels);
632 if (pt) {
633 return pt;
634 }
635 #endif
636
637 /* Choose a pixel format for the temp texture which will hold the
638 * image to draw.
639 */
640 pipeFormat = st_choose_matching_format(st, PIPE_BIND_SAMPLER_VIEW,
641 format, type, unpack->SwapBytes);
642
643 if (pipeFormat == PIPE_FORMAT_NONE) {
644 /* Use the generic approach. */
645 GLenum intFormat = internal_format(ctx, format, type);
646
647 pipeFormat = st_choose_format(st, intFormat, format, type,
648 st->internal_target, 0, 0,
649 PIPE_BIND_SAMPLER_VIEW,
650 false, false);
651 assert(pipeFormat != PIPE_FORMAT_NONE);
652 }
653
654 mformat = st_pipe_format_to_mesa_format(pipeFormat);
655 baseInternalFormat = _mesa_get_format_base_format(mformat);
656
657 pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
658 if (!pixels)
659 return NULL;
660
661 /* alloc temporary texture */
662 pt = alloc_texture(st, width, height, pipeFormat, PIPE_BIND_SAMPLER_VIEW);
663 if (!pt) {
664 _mesa_unmap_pbo_source(ctx, unpack);
665 return NULL;
666 }
667
668 {
669 struct pipe_transfer *transfer;
670 GLubyte *dest;
671 const GLbitfield imageTransferStateSave = ctx->_ImageTransferState;
672
673 /* we'll do pixel transfer in a fragment shader */
674 ctx->_ImageTransferState = 0x0;
675
676 /* map texture transfer */
677 dest = pipe_transfer_map(pipe, pt, 0, 0,
678 PIPE_MAP_WRITE, 0, 0,
679 width, height, &transfer);
680 if (!dest) {
681 pipe_resource_reference(&pt, NULL);
682 _mesa_unmap_pbo_source(ctx, unpack);
683 return NULL;
684 }
685
686 /* Put image into texture transfer.
687 * Note that the image is actually going to be upside down in
688 * the texture. We deal with that with texcoords.
689 */
690 if ((format == GL_RGBA || format == GL_BGRA)
691 && type == GL_UNSIGNED_BYTE) {
692 /* Use a memcpy-based texstore to avoid software pixel swizzling.
693 * We'll do the necessary swizzling with the pipe_sampler_view to
694 * give much better performance.
695 * XXX in the future, expand this to accomodate more format and
696 * type combinations.
697 */
698 _mesa_memcpy_texture(ctx, 2,
699 mformat, /* mesa_format */
700 transfer->stride, /* dstRowStride, bytes */
701 &dest, /* destSlices */
702 width, height, 1, /* size */
703 format, type, /* src format/type */
704 pixels, /* data source */
705 unpack);
706 }
707 else {
708 ASSERTED bool success;
709 success = _mesa_texstore(ctx, 2, /* dims */
710 baseInternalFormat, /* baseInternalFormat */
711 mformat, /* mesa_format */
712 transfer->stride, /* dstRowStride, bytes */
713 &dest, /* destSlices */
714 width, height, 1, /* size */
715 format, type, /* src format/type */
716 pixels, /* data source */
717 unpack);
718
719 assert(success);
720 }
721
722 /* unmap */
723 pipe_transfer_unmap(pipe, transfer);
724
725 /* restore */
726 ctx->_ImageTransferState = imageTransferStateSave;
727 }
728
729 #if USE_DRAWPIXELS_CACHE
730 cache_drawpixels_image(st, width, height, format, type, unpack, pixels, pt);
731 #endif
732
733 _mesa_unmap_pbo_source(ctx, unpack);
734
735 return pt;
736 }
737
738
739 static void
draw_textured_quad(struct gl_context * ctx,GLint x,GLint y,GLfloat z,GLsizei width,GLsizei height,GLfloat zoomX,GLfloat zoomY,struct pipe_sampler_view ** sv,int num_sampler_view,void * driver_vp,void * driver_fp,struct st_fp_variant * fpv,const GLfloat * color,GLboolean invertTex,GLboolean write_depth,GLboolean write_stencil)740 draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
741 GLsizei width, GLsizei height,
742 GLfloat zoomX, GLfloat zoomY,
743 struct pipe_sampler_view **sv,
744 int num_sampler_view,
745 void *driver_vp,
746 void *driver_fp,
747 struct st_fp_variant *fpv,
748 const GLfloat *color,
749 GLboolean invertTex,
750 GLboolean write_depth, GLboolean write_stencil)
751 {
752 struct st_context *st = st_context(ctx);
753 struct pipe_context *pipe = st->pipe;
754 struct cso_context *cso = st->cso_context;
755 const unsigned fb_width = _mesa_geometric_width(ctx->DrawBuffer);
756 const unsigned fb_height = _mesa_geometric_height(ctx->DrawBuffer);
757 GLfloat x0, y0, x1, y1;
758 ASSERTED GLsizei maxSize;
759 boolean normalized = sv[0]->texture->target == PIPE_TEXTURE_2D;
760 unsigned cso_state_mask;
761
762 assert(sv[0]->texture->target == st->internal_target);
763
764 /* limit checks */
765 /* XXX if DrawPixels image is larger than max texture size, break
766 * it up into chunks.
767 */
768 maxSize = pipe->screen->get_param(pipe->screen,
769 PIPE_CAP_MAX_TEXTURE_2D_SIZE);
770 assert(width <= maxSize);
771 assert(height <= maxSize);
772
773 cso_state_mask = (CSO_BIT_RASTERIZER |
774 CSO_BIT_VIEWPORT |
775 CSO_BIT_FRAGMENT_SAMPLERS |
776 CSO_BIT_FRAGMENT_SAMPLER_VIEWS |
777 CSO_BIT_STREAM_OUTPUTS |
778 CSO_BIT_VERTEX_ELEMENTS |
779 CSO_BIT_AUX_VERTEX_BUFFER_SLOT |
780 CSO_BITS_ALL_SHADERS);
781 if (write_stencil) {
782 cso_state_mask |= (CSO_BIT_DEPTH_STENCIL_ALPHA |
783 CSO_BIT_BLEND);
784 }
785 cso_save_state(cso, cso_state_mask);
786
787 /* rasterizer state: just scissor */
788 {
789 struct pipe_rasterizer_state rasterizer;
790 memset(&rasterizer, 0, sizeof(rasterizer));
791 rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader &&
792 ctx->Color._ClampFragmentColor;
793 rasterizer.half_pixel_center = 1;
794 rasterizer.bottom_edge_rule = 1;
795 rasterizer.depth_clip_near = st->clamp_frag_depth_in_shader ||
796 !ctx->Transform.DepthClampNear;
797 rasterizer.depth_clip_far = st->clamp_frag_depth_in_shader ||
798 !ctx->Transform.DepthClampFar;
799 rasterizer.scissor = ctx->Scissor.EnableFlags;
800 cso_set_rasterizer(cso, &rasterizer);
801 }
802
803 if (write_stencil) {
804 /* Stencil writing bypasses the normal fragment pipeline to
805 * disable color writing and set stencil test to always pass.
806 */
807 struct pipe_depth_stencil_alpha_state dsa;
808 struct pipe_blend_state blend;
809
810 /* depth/stencil */
811 memset(&dsa, 0, sizeof(dsa));
812 dsa.stencil[0].enabled = 1;
813 dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
814 dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
815 dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
816 if (write_depth) {
817 /* writing depth+stencil: depth test always passes */
818 dsa.depth.enabled = 1;
819 dsa.depth.writemask = ctx->Depth.Mask;
820 dsa.depth.func = PIPE_FUNC_ALWAYS;
821 }
822 cso_set_depth_stencil_alpha(cso, &dsa);
823
824 /* blend (colormask) */
825 memset(&blend, 0, sizeof(blend));
826 cso_set_blend(cso, &blend);
827 }
828
829 /* fragment shader state: TEX lookup program */
830 cso_set_fragment_shader_handle(cso, driver_fp);
831
832 /* vertex shader state: position + texcoord pass-through */
833 cso_set_vertex_shader_handle(cso, driver_vp);
834
835 /* disable other shaders */
836 cso_set_tessctrl_shader_handle(cso, NULL);
837 cso_set_tesseval_shader_handle(cso, NULL);
838 cso_set_geometry_shader_handle(cso, NULL);
839
840 /* user samplers, plus the drawpix samplers */
841 {
842 struct pipe_sampler_state sampler;
843
844 memset(&sampler, 0, sizeof(sampler));
845 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP;
846 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP;
847 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP;
848 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
849 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
850 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
851 sampler.normalized_coords = normalized;
852
853 if (fpv) {
854 /* drawing a color image */
855 const struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
856 uint num = MAX3(fpv->drawpix_sampler + 1,
857 fpv->pixelmap_sampler + 1,
858 st->state.num_frag_samplers);
859 uint i;
860
861 for (i = 0; i < st->state.num_frag_samplers; i++)
862 samplers[i] = &st->state.frag_samplers[i];
863
864 samplers[fpv->drawpix_sampler] = &sampler;
865 if (sv[1])
866 samplers[fpv->pixelmap_sampler] = &sampler;
867
868 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num, samplers);
869 } else {
870 /* drawing a depth/stencil image */
871 const struct pipe_sampler_state *samplers[2] = {&sampler, &sampler};
872
873 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, samplers);
874 }
875 }
876
877 /* user textures, plus the drawpix textures */
878 if (fpv) {
879 /* drawing a color image */
880 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
881 uint num = MAX3(fpv->drawpix_sampler + 1,
882 fpv->pixelmap_sampler + 1,
883 st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
884
885 memcpy(sampler_views, st->state.frag_sampler_views,
886 sizeof(sampler_views));
887
888 sampler_views[fpv->drawpix_sampler] = sv[0];
889 if (sv[1])
890 sampler_views[fpv->pixelmap_sampler] = sv[1];
891 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num, sampler_views);
892 } else {
893 /* drawing a depth/stencil image */
894 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv);
895 }
896
897 /* viewport state: viewport matching window dims */
898 cso_set_viewport_dims(cso, fb_width, fb_height, TRUE);
899
900 st->util_velems.count = 3;
901 cso_set_vertex_elements(cso, &st->util_velems);
902 cso_set_stream_outputs(cso, 0, NULL, NULL);
903
904 /* Compute Gallium window coords (y=0=top) with pixel zoom.
905 * Recall that these coords are transformed by the current
906 * vertex shader and viewport transformation.
907 */
908 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
909 y = fb_height - (int) (y + height * ctx->Pixel.ZoomY);
910 invertTex = !invertTex;
911 }
912
913 x0 = (GLfloat) x;
914 x1 = x + width * ctx->Pixel.ZoomX;
915 y0 = (GLfloat) y;
916 y1 = y + height * ctx->Pixel.ZoomY;
917
918 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
919 z = z * 2.0f - 1.0f;
920
921 {
922 const float clip_x0 = x0 / (float) fb_width * 2.0f - 1.0f;
923 const float clip_y0 = y0 / (float) fb_height * 2.0f - 1.0f;
924 const float clip_x1 = x1 / (float) fb_width * 2.0f - 1.0f;
925 const float clip_y1 = y1 / (float) fb_height * 2.0f - 1.0f;
926 const float maxXcoord = normalized ?
927 ((float) width / sv[0]->texture->width0) : (float) width;
928 const float maxYcoord = normalized
929 ? ((float) height / sv[0]->texture->height0) : (float) height;
930 const float sLeft = 0.0f, sRight = maxXcoord;
931 const float tTop = invertTex ? maxYcoord : 0.0f;
932 const float tBot = invertTex ? 0.0f : maxYcoord;
933
934 if (!st_draw_quad(st, clip_x0, clip_y0, clip_x1, clip_y1, z,
935 sLeft, tBot, sRight, tTop, color, 0)) {
936 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
937 }
938 }
939
940 /* restore state */
941 cso_restore_state(cso);
942 }
943
944
945 /**
946 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
947 * can't use a fragment shader to write stencil values.
948 */
949 static void
draw_stencil_pixels(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const void * pixels)950 draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
951 GLsizei width, GLsizei height, GLenum format, GLenum type,
952 const struct gl_pixelstore_attrib *unpack,
953 const void *pixels)
954 {
955 struct st_context *st = st_context(ctx);
956 struct pipe_context *pipe = st->pipe;
957 struct st_renderbuffer *strb;
958 enum pipe_map_flags usage;
959 struct pipe_transfer *pt;
960 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
961 ubyte *stmap;
962 struct gl_pixelstore_attrib clippedUnpack = *unpack;
963 GLubyte *sValues;
964 GLuint *zValues;
965
966 if (!zoom) {
967 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
968 &clippedUnpack)) {
969 /* totally clipped */
970 return;
971 }
972 }
973
974 strb = st_renderbuffer(ctx->DrawBuffer->
975 Attachment[BUFFER_STENCIL].Renderbuffer);
976
977 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
978 y = ctx->DrawBuffer->Height - y - height;
979 }
980
981 if (format == GL_STENCIL_INDEX &&
982 _mesa_is_format_packed_depth_stencil(strb->Base.Format)) {
983 /* writing stencil to a combined depth+stencil buffer */
984 usage = PIPE_MAP_READ_WRITE;
985 }
986 else {
987 usage = PIPE_MAP_WRITE;
988 }
989
990 stmap = pipe_transfer_map(pipe, strb->texture,
991 strb->surface->u.tex.level,
992 strb->surface->u.tex.first_layer,
993 usage, x, y,
994 width, height, &pt);
995
996 pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels);
997 assert(pixels);
998
999 sValues = malloc(width * sizeof(GLubyte));
1000 zValues = malloc(width * sizeof(GLuint));
1001
1002 if (sValues && zValues) {
1003 GLint row;
1004 for (row = 0; row < height; row++) {
1005 GLfloat *zValuesFloat = (GLfloat*)zValues;
1006 GLenum destType = GL_UNSIGNED_BYTE;
1007 const void *source = _mesa_image_address2d(&clippedUnpack, pixels,
1008 width, height,
1009 format, type,
1010 row, 0);
1011 _mesa_unpack_stencil_span(ctx, width, destType, sValues,
1012 type, source, &clippedUnpack,
1013 ctx->_ImageTransferState);
1014
1015 if (format == GL_DEPTH_STENCIL) {
1016 GLenum ztype =
1017 pt->resource->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT ?
1018 GL_FLOAT : GL_UNSIGNED_INT;
1019
1020 _mesa_unpack_depth_span(ctx, width, ztype, zValues,
1021 (1 << 24) - 1, type, source,
1022 &clippedUnpack);
1023 }
1024
1025 if (zoom) {
1026 _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with "
1027 "zoom not complete");
1028 }
1029
1030 {
1031 GLint spanY;
1032
1033 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1034 spanY = height - row - 1;
1035 }
1036 else {
1037 spanY = row;
1038 }
1039
1040 /* now pack the stencil (and Z) values in the dest format */
1041 switch (pt->resource->format) {
1042 case PIPE_FORMAT_S8_UINT:
1043 {
1044 ubyte *dest = stmap + spanY * pt->stride;
1045 assert(usage == PIPE_MAP_WRITE);
1046 memcpy(dest, sValues, width);
1047 }
1048 break;
1049 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
1050 if (format == GL_DEPTH_STENCIL) {
1051 uint *dest = (uint *) (stmap + spanY * pt->stride);
1052 GLint k;
1053 assert(usage == PIPE_MAP_WRITE);
1054 for (k = 0; k < width; k++) {
1055 dest[k] = zValues[k] | (sValues[k] << 24);
1056 }
1057 }
1058 else {
1059 uint *dest = (uint *) (stmap + spanY * pt->stride);
1060 GLint k;
1061 assert(usage == PIPE_MAP_READ_WRITE);
1062 for (k = 0; k < width; k++) {
1063 dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24);
1064 }
1065 }
1066 break;
1067 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
1068 if (format == GL_DEPTH_STENCIL) {
1069 uint *dest = (uint *) (stmap + spanY * pt->stride);
1070 GLint k;
1071 assert(usage == PIPE_MAP_WRITE);
1072 for (k = 0; k < width; k++) {
1073 dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff);
1074 }
1075 }
1076 else {
1077 uint *dest = (uint *) (stmap + spanY * pt->stride);
1078 GLint k;
1079 assert(usage == PIPE_MAP_READ_WRITE);
1080 for (k = 0; k < width; k++) {
1081 dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff);
1082 }
1083 }
1084 break;
1085 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
1086 if (format == GL_DEPTH_STENCIL) {
1087 uint *dest = (uint *) (stmap + spanY * pt->stride);
1088 GLfloat *destf = (GLfloat*)dest;
1089 GLint k;
1090 assert(usage == PIPE_MAP_WRITE);
1091 for (k = 0; k < width; k++) {
1092 destf[k*2] = zValuesFloat[k];
1093 dest[k*2+1] = sValues[k] & 0xff;
1094 }
1095 }
1096 else {
1097 uint *dest = (uint *) (stmap + spanY * pt->stride);
1098 GLint k;
1099 assert(usage == PIPE_MAP_READ_WRITE);
1100 for (k = 0; k < width; k++) {
1101 dest[k*2+1] = sValues[k] & 0xff;
1102 }
1103 }
1104 break;
1105 default:
1106 assert(0);
1107 }
1108 }
1109 }
1110 }
1111 else {
1112 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels()");
1113 }
1114
1115 free(sValues);
1116 free(zValues);
1117
1118 _mesa_unmap_pbo_source(ctx, &clippedUnpack);
1119
1120 /* unmap the stencil buffer */
1121 pipe_transfer_unmap(pipe, pt);
1122 }
1123
1124
1125 /**
1126 * Get fragment program variant for a glDrawPixels or glCopyPixels
1127 * command for RGBA data.
1128 */
1129 static struct st_fp_variant *
get_color_fp_variant(struct st_context * st)1130 get_color_fp_variant(struct st_context *st)
1131 {
1132 struct gl_context *ctx = st->ctx;
1133 struct st_fp_variant_key key;
1134 struct st_fp_variant *fpv;
1135
1136 memset(&key, 0, sizeof(key));
1137
1138 key.st = st->has_shareable_shaders ? NULL : st;
1139 key.drawpixels = 1;
1140 key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 ||
1141 ctx->Pixel.RedScale != 1.0 ||
1142 ctx->Pixel.GreenBias != 0.0 ||
1143 ctx->Pixel.GreenScale != 1.0 ||
1144 ctx->Pixel.BlueBias != 0.0 ||
1145 ctx->Pixel.BlueScale != 1.0 ||
1146 ctx->Pixel.AlphaBias != 0.0 ||
1147 ctx->Pixel.AlphaScale != 1.0);
1148 key.pixelMaps = ctx->Pixel.MapColorFlag;
1149 key.clamp_color = st->clamp_frag_color_in_shader &&
1150 ctx->Color._ClampFragmentColor;
1151 key.lower_alpha_func = COMPARE_FUNC_ALWAYS;
1152
1153 fpv = st_get_fp_variant(st, st->fp, &key);
1154
1155 return fpv;
1156 }
1157
1158 /**
1159 * Get fragment program variant for a glDrawPixels command
1160 * for COLOR_INDEX data
1161 */
1162 static struct st_fp_variant *
get_color_index_fp_variant(struct st_context * st)1163 get_color_index_fp_variant(struct st_context *st)
1164 {
1165 struct gl_context *ctx = st->ctx;
1166 struct st_fp_variant_key key;
1167 struct st_fp_variant *fpv;
1168
1169 memset(&key, 0, sizeof(key));
1170
1171 key.st = st->has_shareable_shaders ? NULL : st;
1172 key.drawpixels = 1;
1173 /* Since GL is always in RGBA mode MapColorFlag does not
1174 * affect GL_COLOR_INDEX format.
1175 * Scale and bias also never affect GL_COLOR_INDEX format.
1176 */
1177 key.scaleAndBias = 0;
1178 key.pixelMaps = 0;
1179 key.clamp_color = st->clamp_frag_color_in_shader &&
1180 ctx->Color._ClampFragmentColor;
1181 key.lower_alpha_func = COMPARE_FUNC_ALWAYS;
1182
1183 fpv = st_get_fp_variant(st, st->fp, &key);
1184
1185 return fpv;
1186 }
1187
1188
1189 /**
1190 * Clamp glDrawPixels width and height to the maximum texture size.
1191 */
1192 static void
clamp_size(struct pipe_context * pipe,GLsizei * width,GLsizei * height,struct gl_pixelstore_attrib * unpack)1193 clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height,
1194 struct gl_pixelstore_attrib *unpack)
1195 {
1196 const int maxSize = pipe->screen->get_param(pipe->screen,
1197 PIPE_CAP_MAX_TEXTURE_2D_SIZE);
1198
1199 if (*width > maxSize) {
1200 if (unpack->RowLength == 0)
1201 unpack->RowLength = *width;
1202 *width = maxSize;
1203 }
1204 if (*height > maxSize) {
1205 *height = maxSize;
1206 }
1207 }
1208
1209
1210 /**
1211 * Search the array of 4 swizzle components for the named component and return
1212 * its position.
1213 */
1214 static unsigned
search_swizzle(const unsigned char swizzle[4],unsigned component)1215 search_swizzle(const unsigned char swizzle[4], unsigned component)
1216 {
1217 unsigned i;
1218 for (i = 0; i < 4; i++) {
1219 if (swizzle[i] == component)
1220 return i;
1221 }
1222 assert(!"search_swizzle() failed");
1223 return 0;
1224 }
1225
1226
1227 /**
1228 * Set the sampler view's swizzle terms. This is used to handle RGBA
1229 * swizzling when the incoming image format isn't an exact match for
1230 * the actual texture format. For example, if we have glDrawPixels(
1231 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1232 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1233 * avoid swizzling all the pixels in software in the texstore code.
1234 */
1235 static void
setup_sampler_swizzle(struct pipe_sampler_view * sv,GLenum format,GLenum type)1236 setup_sampler_swizzle(struct pipe_sampler_view *sv, GLenum format, GLenum type)
1237 {
1238 if ((format == GL_RGBA || format == GL_BGRA) && type == GL_UNSIGNED_BYTE) {
1239 const struct util_format_description *desc =
1240 util_format_description(sv->format);
1241 unsigned c0, c1, c2, c3;
1242
1243 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1244 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1245 */
1246 assert(desc->block.bits == 32);
1247
1248 /* invert the format's swizzle to setup the sampler's swizzle */
1249 if (format == GL_RGBA) {
1250 c0 = PIPE_SWIZZLE_X;
1251 c1 = PIPE_SWIZZLE_Y;
1252 c2 = PIPE_SWIZZLE_Z;
1253 c3 = PIPE_SWIZZLE_W;
1254 }
1255 else {
1256 assert(format == GL_BGRA);
1257 c0 = PIPE_SWIZZLE_Z;
1258 c1 = PIPE_SWIZZLE_Y;
1259 c2 = PIPE_SWIZZLE_X;
1260 c3 = PIPE_SWIZZLE_W;
1261 }
1262 sv->swizzle_r = search_swizzle(desc->swizzle, c0);
1263 sv->swizzle_g = search_swizzle(desc->swizzle, c1);
1264 sv->swizzle_b = search_swizzle(desc->swizzle, c2);
1265 sv->swizzle_a = search_swizzle(desc->swizzle, c3);
1266 }
1267 else {
1268 /* use the default sampler swizzle */
1269 }
1270 }
1271
1272
1273 /**
1274 * Compute the effective raster z position. This performs depth-clamping
1275 * if needed.
1276 */
1277 static float
get_effective_raster_z(struct gl_context * ctx)1278 get_effective_raster_z(struct gl_context *ctx)
1279 {
1280 float z = ctx->Current.RasterPos[2];
1281 if (st_context(ctx)->clamp_frag_depth_in_shader) {
1282 GLfloat depth_near;
1283 GLfloat depth_far;
1284 if (ctx->ViewportArray[0].Near < ctx->ViewportArray[0].Far) {
1285 depth_near = ctx->ViewportArray[0].Near;
1286 depth_far = ctx->ViewportArray[0].Far;
1287 } else {
1288 depth_near = ctx->ViewportArray[0].Far;
1289 depth_far = ctx->ViewportArray[0].Near;
1290 }
1291
1292 if (ctx->Transform.DepthClampNear)
1293 z = MAX2(z, depth_near);
1294 if (ctx->Transform.DepthClampFar)
1295 z = MIN2(z, depth_far);
1296 }
1297 return z;
1298 }
1299
1300
1301 /**
1302 * Called via ctx->Driver.DrawPixels()
1303 */
1304 static void
st_DrawPixels(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const void * pixels)1305 st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
1306 GLsizei width, GLsizei height,
1307 GLenum format, GLenum type,
1308 const struct gl_pixelstore_attrib *unpack, const void *pixels)
1309 {
1310 void *driver_fp;
1311 struct st_context *st = st_context(ctx);
1312 struct pipe_context *pipe = st->pipe;
1313 GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE;
1314 struct pipe_sampler_view *sv[2] = { NULL };
1315 int num_sampler_view = 1;
1316 struct gl_pixelstore_attrib clippedUnpack;
1317 struct st_fp_variant *fpv = NULL;
1318 struct pipe_resource *pt;
1319
1320 /* Mesa state should be up to date by now */
1321 assert(ctx->NewState == 0x0);
1322
1323 _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
1324
1325 st_flush_bitmap_cache(st);
1326 st_invalidate_readpix_cache(st);
1327
1328 st_validate_state(st, ST_PIPELINE_META);
1329
1330 /* Limit the size of the glDrawPixels to the max texture size.
1331 * Strictly speaking, that's not correct but since we don't handle
1332 * larger images yet, this is better than crashing.
1333 */
1334 clippedUnpack = *unpack;
1335 unpack = &clippedUnpack;
1336 clamp_size(st->pipe, &width, &height, &clippedUnpack);
1337
1338 if (format == GL_DEPTH_STENCIL)
1339 write_stencil = write_depth = GL_TRUE;
1340 else if (format == GL_STENCIL_INDEX)
1341 write_stencil = GL_TRUE;
1342 else if (format == GL_DEPTH_COMPONENT)
1343 write_depth = GL_TRUE;
1344
1345 if (write_stencil &&
1346 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
1347 /* software fallback */
1348 draw_stencil_pixels(ctx, x, y, width, height, format, type,
1349 unpack, pixels);
1350 return;
1351 }
1352
1353 /* Put glDrawPixels image into a texture */
1354 pt = make_texture(st, width, height, format, type, unpack, pixels);
1355 if (!pt) {
1356 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1357 return;
1358 }
1359
1360 st_make_passthrough_vertex_shader(st);
1361
1362 /*
1363 * Get vertex/fragment shaders
1364 */
1365 if (write_depth || write_stencil) {
1366 driver_fp = get_drawpix_z_stencil_program(st, write_depth,
1367 write_stencil);
1368 }
1369 else {
1370 fpv = (format != GL_COLOR_INDEX) ? get_color_fp_variant(st) :
1371 get_color_index_fp_variant(st);
1372
1373 driver_fp = fpv->base.driver_shader;
1374
1375 if (ctx->Pixel.MapColorFlag && format != GL_COLOR_INDEX) {
1376 pipe_sampler_view_reference(&sv[1],
1377 st->pixel_xfer.pixelmap_sampler_view);
1378 num_sampler_view++;
1379 }
1380
1381 /* compiling a new fragment shader variant added new state constants
1382 * into the constant buffer, we need to update them
1383 */
1384 st_upload_constants(st, &st->fp->Base);
1385 }
1386
1387 {
1388 /* create sampler view for the image */
1389 struct pipe_sampler_view templ;
1390
1391 u_sampler_view_default_template(&templ, pt, pt->format);
1392 /* Set up the sampler view's swizzle */
1393 setup_sampler_swizzle(&templ, format, type);
1394
1395 sv[0] = st->pipe->create_sampler_view(st->pipe, pt, &templ);
1396 }
1397 if (!sv[0]) {
1398 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1399 pipe_resource_reference(&pt, NULL);
1400 return;
1401 }
1402
1403 /* Create a second sampler view to read stencil. The stencil is
1404 * written using the shader stencil export functionality.
1405 */
1406 if (write_stencil) {
1407 enum pipe_format stencil_format =
1408 util_format_stencil_only(pt->format);
1409 /* we should not be doing pixel map/transfer (see above) */
1410 assert(num_sampler_view == 1);
1411 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt,
1412 stencil_format);
1413 if (!sv[1]) {
1414 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
1415 pipe_resource_reference(&pt, NULL);
1416 pipe_sampler_view_reference(&sv[0], NULL);
1417 return;
1418 }
1419 num_sampler_view++;
1420 }
1421
1422 draw_textured_quad(ctx, x, y, get_effective_raster_z(ctx),
1423 width, height,
1424 ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1425 sv,
1426 num_sampler_view,
1427 st->passthrough_vs,
1428 driver_fp, fpv,
1429 ctx->Current.RasterColor,
1430 GL_FALSE, write_depth, write_stencil);
1431 pipe_sampler_view_reference(&sv[0], NULL);
1432 if (num_sampler_view > 1)
1433 pipe_sampler_view_reference(&sv[1], NULL);
1434
1435 /* free the texture (but may persist in the cache) */
1436 pipe_resource_reference(&pt, NULL);
1437 }
1438
1439
1440
1441 /**
1442 * Software fallback for glCopyPixels(GL_STENCIL).
1443 */
1444 static void
copy_stencil_pixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint dstx,GLint dsty)1445 copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1446 GLsizei width, GLsizei height,
1447 GLint dstx, GLint dsty)
1448 {
1449 struct st_renderbuffer *rbDraw;
1450 struct pipe_context *pipe = st_context(ctx)->pipe;
1451 enum pipe_map_flags usage;
1452 struct pipe_transfer *ptDraw;
1453 ubyte *drawMap;
1454 ubyte *buffer;
1455 int i;
1456
1457 buffer = malloc(width * height * sizeof(ubyte));
1458 if (!buffer) {
1459 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)");
1460 return;
1461 }
1462
1463 /* Get the dest renderbuffer */
1464 rbDraw = st_renderbuffer(ctx->DrawBuffer->
1465 Attachment[BUFFER_STENCIL].Renderbuffer);
1466
1467 /* this will do stencil pixel transfer ops */
1468 _mesa_readpixels(ctx, srcx, srcy, width, height,
1469 GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
1470 &ctx->DefaultPacking, buffer);
1471
1472 if (0) {
1473 /* debug code: dump stencil values */
1474 GLint row, col;
1475 for (row = 0; row < height; row++) {
1476 printf("%3d: ", row);
1477 for (col = 0; col < width; col++) {
1478 printf("%02x ", buffer[col + row * width]);
1479 }
1480 printf("\n");
1481 }
1482 }
1483
1484 if (_mesa_is_format_packed_depth_stencil(rbDraw->Base.Format))
1485 usage = PIPE_MAP_READ_WRITE;
1486 else
1487 usage = PIPE_MAP_WRITE;
1488
1489 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1490 dsty = rbDraw->Base.Height - dsty - height;
1491 }
1492
1493 assert(util_format_get_blockwidth(rbDraw->texture->format) == 1);
1494 assert(util_format_get_blockheight(rbDraw->texture->format) == 1);
1495
1496 /* map the stencil buffer */
1497 drawMap = pipe_transfer_map(pipe,
1498 rbDraw->texture,
1499 rbDraw->surface->u.tex.level,
1500 rbDraw->surface->u.tex.first_layer,
1501 usage, dstx, dsty,
1502 width, height, &ptDraw);
1503
1504 /* draw */
1505 /* XXX PixelZoom not handled yet */
1506 for (i = 0; i < height; i++) {
1507 ubyte *dst;
1508 const ubyte *src;
1509 int y;
1510
1511 y = i;
1512
1513 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1514 y = height - y - 1;
1515 }
1516
1517 dst = drawMap + y * ptDraw->stride;
1518 src = buffer + i * width;
1519
1520 _mesa_pack_ubyte_stencil_row(rbDraw->Base.Format, width, src, dst);
1521 }
1522
1523 free(buffer);
1524
1525 /* unmap the stencil buffer */
1526 pipe_transfer_unmap(pipe, ptDraw);
1527 }
1528
1529
1530 /**
1531 * Return renderbuffer to use for reading color pixels for glCopyPixels
1532 */
1533 static struct st_renderbuffer *
st_get_color_read_renderbuffer(struct gl_context * ctx)1534 st_get_color_read_renderbuffer(struct gl_context *ctx)
1535 {
1536 struct gl_framebuffer *fb = ctx->ReadBuffer;
1537 struct st_renderbuffer *strb =
1538 st_renderbuffer(fb->_ColorReadBuffer);
1539
1540 return strb;
1541 }
1542
1543
1544 /**
1545 * Try to do a glCopyPixels for simple cases with a blit by calling
1546 * pipe->blit().
1547 *
1548 * We can do this when we're copying color pixels (depth/stencil
1549 * eventually) with no pixel zoom, no pixel transfer ops, no
1550 * per-fragment ops, and the src/dest regions don't overlap.
1551 */
1552 static GLboolean
blit_copy_pixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint dstx,GLint dsty,GLenum type)1553 blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1554 GLsizei width, GLsizei height,
1555 GLint dstx, GLint dsty, GLenum type)
1556 {
1557 struct st_context *st = st_context(ctx);
1558 struct pipe_context *pipe = st->pipe;
1559 struct pipe_screen *screen = pipe->screen;
1560 struct gl_pixelstore_attrib pack, unpack;
1561 GLint readX, readY, readW, readH, drawX, drawY, drawW, drawH;
1562
1563 if (type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV)
1564 return GL_FALSE;
1565
1566 if (ctx->Pixel.ZoomX == 1.0 &&
1567 ctx->Pixel.ZoomY == 1.0 &&
1568 (type != GL_COLOR ||
1569 (ctx->_ImageTransferState == 0x0 &&
1570 !ctx->Color.BlendEnabled &&
1571 !ctx->Color.AlphaEnabled &&
1572 (!ctx->Color.ColorLogicOpEnabled || ctx->Color.LogicOp == GL_COPY) &&
1573 !ctx->Depth.BoundsTest &&
1574 !ctx->Depth.Test &&
1575 !ctx->Fog.Enabled &&
1576 !ctx->Stencil.Enabled &&
1577 !ctx->FragmentProgram.Enabled &&
1578 !ctx->VertexProgram.Enabled &&
1579 !ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT] &&
1580 !_mesa_ati_fragment_shader_enabled(ctx) &&
1581 ctx->DrawBuffer->_NumColorDrawBuffers == 1)) &&
1582 !ctx->Query.CondRenderQuery &&
1583 !ctx->Query.CurrentOcclusionObject) {
1584 struct st_renderbuffer *rbRead, *rbDraw;
1585
1586 /*
1587 * Clip the read region against the src buffer bounds.
1588 * We'll still allocate a temporary buffer/texture for the original
1589 * src region size but we'll only read the region which is on-screen.
1590 * This may mean that we draw garbage pixels into the dest region, but
1591 * that's expected.
1592 */
1593 readX = srcx;
1594 readY = srcy;
1595 readW = width;
1596 readH = height;
1597 pack = ctx->DefaultPacking;
1598 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack))
1599 return GL_TRUE; /* all done */
1600
1601 /* clip against dest buffer bounds and scissor box */
1602 drawX = dstx + pack.SkipPixels;
1603 drawY = dsty + pack.SkipRows;
1604 unpack = pack;
1605 if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack))
1606 return GL_TRUE; /* all done */
1607
1608 readX = readX - pack.SkipPixels + unpack.SkipPixels;
1609 readY = readY - pack.SkipRows + unpack.SkipRows;
1610
1611 drawW = readW;
1612 drawH = readH;
1613
1614 if (type == GL_COLOR) {
1615 rbRead = st_get_color_read_renderbuffer(ctx);
1616 rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
1617 } else if (type == GL_DEPTH || type == GL_DEPTH_STENCIL) {
1618 rbRead = st_renderbuffer(ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer);
1619 rbDraw = st_renderbuffer(ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer);
1620 } else if (type == GL_STENCIL) {
1621 rbRead = st_renderbuffer(ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer);
1622 rbDraw = st_renderbuffer(ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer);
1623 } else {
1624 return false;
1625 }
1626
1627 /* Flip src/dst position depending on the orientation of buffers. */
1628 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1629 readY = rbRead->Base.Height - readY;
1630 readH = -readH;
1631 }
1632
1633 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1634 /* We can't flip the destination for pipe->blit, so we only adjust
1635 * its position and flip the source.
1636 */
1637 drawY = rbDraw->Base.Height - drawY - drawH;
1638 readY += readH;
1639 readH = -readH;
1640 }
1641
1642 if (rbRead != rbDraw ||
1643 !_mesa_regions_overlap(readX, readY, readX + readW, readY + readH,
1644 drawX, drawY, drawX + drawW, drawY + drawH)) {
1645 struct pipe_blit_info blit;
1646
1647 memset(&blit, 0, sizeof(blit));
1648 blit.src.resource = rbRead->texture;
1649 blit.src.level = rbRead->surface->u.tex.level;
1650 blit.src.format = rbRead->texture->format;
1651 blit.src.box.x = readX;
1652 blit.src.box.y = readY;
1653 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1654 blit.src.box.width = readW;
1655 blit.src.box.height = readH;
1656 blit.src.box.depth = 1;
1657 blit.dst.resource = rbDraw->texture;
1658 blit.dst.level = rbDraw->surface->u.tex.level;
1659 blit.dst.format = rbDraw->texture->format;
1660 blit.dst.box.x = drawX;
1661 blit.dst.box.y = drawY;
1662 blit.dst.box.z = rbDraw->surface->u.tex.first_layer;
1663 blit.dst.box.width = drawW;
1664 blit.dst.box.height = drawH;
1665 blit.dst.box.depth = 1;
1666 blit.filter = PIPE_TEX_FILTER_NEAREST;
1667
1668 if (type == GL_COLOR)
1669 blit.mask |= PIPE_MASK_RGBA;
1670 if (type == GL_DEPTH)
1671 blit.mask |= PIPE_MASK_Z;
1672 if (type == GL_STENCIL)
1673 blit.mask |= PIPE_MASK_S;
1674 if (type == GL_DEPTH_STENCIL)
1675 blit.mask |= PIPE_MASK_ZS;
1676
1677 if (ctx->DrawBuffer != ctx->WinSysDrawBuffer)
1678 st_window_rectangles_to_blit(ctx, &blit);
1679
1680 if (screen->is_format_supported(screen, blit.src.format,
1681 blit.src.resource->target,
1682 blit.src.resource->nr_samples,
1683 blit.src.resource->nr_storage_samples,
1684 PIPE_BIND_SAMPLER_VIEW) &&
1685 screen->is_format_supported(screen, blit.dst.format,
1686 blit.dst.resource->target,
1687 blit.dst.resource->nr_samples,
1688 blit.dst.resource->nr_storage_samples,
1689 PIPE_BIND_RENDER_TARGET)) {
1690 pipe->blit(pipe, &blit);
1691 return GL_TRUE;
1692 }
1693 }
1694 }
1695
1696 return GL_FALSE;
1697 }
1698
1699
1700 static void
st_CopyPixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint dstx,GLint dsty,GLenum type)1701 st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1702 GLsizei width, GLsizei height,
1703 GLint dstx, GLint dsty, GLenum type)
1704 {
1705 struct st_context *st = st_context(ctx);
1706 struct pipe_context *pipe = st->pipe;
1707 struct pipe_screen *screen = pipe->screen;
1708 struct st_renderbuffer *rbRead;
1709 void *driver_fp;
1710 struct pipe_resource *pt;
1711 struct pipe_sampler_view *sv[2] = { NULL };
1712 struct st_fp_variant *fpv = NULL;
1713 int num_sampler_view = 1;
1714 enum pipe_format srcFormat;
1715 unsigned srcBind;
1716 GLboolean invertTex = GL_FALSE;
1717 GLint readX, readY, readW, readH;
1718 struct gl_pixelstore_attrib pack = ctx->DefaultPacking;
1719 GLboolean write_stencil = GL_FALSE;
1720 GLboolean write_depth = GL_FALSE;
1721
1722 _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
1723
1724 st_flush_bitmap_cache(st);
1725 st_invalidate_readpix_cache(st);
1726
1727 st_validate_state(st, ST_PIPELINE_META);
1728
1729 if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type))
1730 return;
1731
1732 /* fallback if the driver can't do stencil exports */
1733 if (type == GL_DEPTH_STENCIL &&
1734 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
1735 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_STENCIL);
1736 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_DEPTH);
1737 return;
1738 }
1739
1740 /* fallback if the driver can't do stencil exports */
1741 if (type == GL_STENCIL &&
1742 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
1743 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
1744 return;
1745 }
1746
1747 /*
1748 * The subsequent code implements glCopyPixels by copying the source
1749 * pixels into a temporary texture that's then applied to a textured quad.
1750 * When we draw the textured quad, all the usual per-fragment operations
1751 * are handled.
1752 */
1753
1754 st_make_passthrough_vertex_shader(st);
1755
1756 /*
1757 * Get vertex/fragment shaders
1758 */
1759 if (type == GL_COLOR) {
1760 fpv = get_color_fp_variant(st);
1761
1762 rbRead = st_get_color_read_renderbuffer(ctx);
1763
1764 driver_fp = fpv->base.driver_shader;
1765
1766 if (ctx->Pixel.MapColorFlag) {
1767 pipe_sampler_view_reference(&sv[1],
1768 st->pixel_xfer.pixelmap_sampler_view);
1769 num_sampler_view++;
1770 }
1771
1772 /* compiling a new fragment shader variant added new state constants
1773 * into the constant buffer, we need to update them
1774 */
1775 st_upload_constants(st, &st->fp->Base);
1776 } else if (type == GL_DEPTH) {
1777 rbRead = st_renderbuffer(ctx->ReadBuffer->
1778 Attachment[BUFFER_DEPTH].Renderbuffer);
1779 driver_fp = get_drawpix_z_stencil_program(st, GL_TRUE, GL_FALSE);
1780 } else if (type == GL_STENCIL) {
1781 rbRead = st_renderbuffer(ctx->ReadBuffer->
1782 Attachment[BUFFER_STENCIL].Renderbuffer);
1783 driver_fp = get_drawpix_z_stencil_program(st, GL_FALSE, GL_TRUE);
1784 } else if (type == GL_DEPTH_STENCIL) {
1785 rbRead = st_renderbuffer(ctx->ReadBuffer->
1786 Attachment[BUFFER_DEPTH].Renderbuffer);
1787 driver_fp = get_drawpix_z_stencil_program(st, GL_TRUE, GL_TRUE);
1788 } else {
1789 assert(type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV);
1790 rbRead = st_renderbuffer(ctx->ReadBuffer->
1791 Attachment[BUFFER_DEPTH].Renderbuffer);
1792 if (type == GL_DEPTH_STENCIL_TO_RGBA_NV)
1793 driver_fp = get_drawpix_zs_to_color_program(st, GL_TRUE);
1794 else
1795 driver_fp = get_drawpix_zs_to_color_program(st, GL_FALSE);
1796 if (!driver_fp) {
1797 assert(0 && "operation not supported by CopyPixels implemetation");
1798 return;
1799 }
1800 }
1801
1802
1803 /* Choose the format for the temporary texture. */
1804 srcFormat = rbRead->texture->format;
1805 srcBind = PIPE_BIND_SAMPLER_VIEW |
1806 (type == GL_COLOR ? PIPE_BIND_RENDER_TARGET : PIPE_BIND_DEPTH_STENCIL);
1807
1808 if (!screen->is_format_supported(screen, srcFormat, st->internal_target, 0,
1809 0, srcBind)) {
1810 /* srcFormat is non-renderable. Find a compatible renderable format. */
1811 if (type == GL_DEPTH) {
1812 srcFormat = st_choose_format(st, GL_DEPTH_COMPONENT, GL_NONE,
1813 GL_NONE, st->internal_target, 0, 0,
1814 srcBind, false, false);
1815 }
1816 else if (type == GL_STENCIL) {
1817 /* can't use texturing, fallback to copy */
1818 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
1819 return;
1820 }
1821 else {
1822 assert(type == GL_COLOR);
1823
1824 if (util_format_is_float(srcFormat)) {
1825 srcFormat = st_choose_format(st, GL_RGBA32F, GL_NONE,
1826 GL_NONE, st->internal_target, 0, 0,
1827 srcBind, false, false);
1828 }
1829 else if (util_format_is_pure_sint(srcFormat)) {
1830 srcFormat = st_choose_format(st, GL_RGBA32I, GL_NONE,
1831 GL_NONE, st->internal_target, 0, 0,
1832 srcBind, false, false);
1833 }
1834 else if (util_format_is_pure_uint(srcFormat)) {
1835 srcFormat = st_choose_format(st, GL_RGBA32UI, GL_NONE,
1836 GL_NONE, st->internal_target, 0, 0,
1837 srcBind, false, false);
1838 }
1839 else if (util_format_is_snorm(srcFormat)) {
1840 srcFormat = st_choose_format(st, GL_RGBA16_SNORM, GL_NONE,
1841 GL_NONE, st->internal_target, 0, 0,
1842 srcBind, false, false);
1843 }
1844 else {
1845 srcFormat = st_choose_format(st, GL_RGBA, GL_NONE,
1846 GL_NONE, st->internal_target, 0, 0,
1847 srcBind, false, false);
1848 }
1849 }
1850
1851 if (srcFormat == PIPE_FORMAT_NONE) {
1852 assert(0 && "cannot choose a format for src of CopyPixels");
1853 return;
1854 }
1855 }
1856
1857 /* Invert src region if needed */
1858 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1859 srcy = ctx->ReadBuffer->Height - srcy - height;
1860 invertTex = !invertTex;
1861 }
1862
1863 /* Clip the read region against the src buffer bounds.
1864 * We'll still allocate a temporary buffer/texture for the original
1865 * src region size but we'll only read the region which is on-screen.
1866 * This may mean that we draw garbage pixels into the dest region, but
1867 * that's expected.
1868 */
1869 readX = srcx;
1870 readY = srcy;
1871 readW = width;
1872 readH = height;
1873 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) {
1874 /* The source region is completely out of bounds. Do nothing.
1875 * The GL spec says "Results of copies from outside the window,
1876 * or from regions of the window that are not exposed, are
1877 * hardware dependent and undefined."
1878 */
1879 return;
1880 }
1881
1882 readW = MAX2(0, readW);
1883 readH = MAX2(0, readH);
1884
1885 /* Allocate the temporary texture. */
1886 pt = alloc_texture(st, width, height, srcFormat, srcBind);
1887 if (!pt)
1888 return;
1889
1890 sv[0] = st_create_texture_sampler_view(st->pipe, pt);
1891 if (!sv[0]) {
1892 pipe_resource_reference(&pt, NULL);
1893 return;
1894 }
1895
1896 /* Create a second sampler view to read stencil */
1897 if (type == GL_STENCIL || type == GL_DEPTH_STENCIL ||
1898 type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV) {
1899 write_stencil = GL_TRUE;
1900 if (type == GL_DEPTH_STENCIL)
1901 write_depth = GL_TRUE;
1902 if (type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV) {
1903 write_depth = FALSE;
1904 write_stencil = FALSE;
1905 }
1906
1907 enum pipe_format stencil_format =
1908 util_format_stencil_only(pt->format);
1909 /* we should not be doing pixel map/transfer (see above) */
1910 assert(num_sampler_view == 1);
1911 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt,
1912 stencil_format);
1913 if (!sv[1]) {
1914 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
1915 pipe_resource_reference(&pt, NULL);
1916 pipe_sampler_view_reference(&sv[0], NULL);
1917 return;
1918 }
1919 num_sampler_view++;
1920 }
1921 /* Copy the src region to the temporary texture. */
1922 {
1923 struct pipe_blit_info blit;
1924
1925 memset(&blit, 0, sizeof(blit));
1926 blit.src.resource = rbRead->texture;
1927 blit.src.level = rbRead->surface->u.tex.level;
1928 blit.src.format = rbRead->texture->format;
1929 blit.src.box.x = readX;
1930 blit.src.box.y = readY;
1931 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1932 blit.src.box.width = readW;
1933 blit.src.box.height = readH;
1934 blit.src.box.depth = 1;
1935 blit.dst.resource = pt;
1936 blit.dst.level = 0;
1937 blit.dst.format = pt->format;
1938 blit.dst.box.x = pack.SkipPixels;
1939 blit.dst.box.y = pack.SkipRows;
1940 blit.dst.box.z = 0;
1941 blit.dst.box.width = readW;
1942 blit.dst.box.height = readH;
1943 blit.dst.box.depth = 1;
1944 if (type == GL_DEPTH)
1945 blit.mask = util_format_get_mask(pt->format) & ~PIPE_MASK_S;
1946 else if (type == GL_STENCIL)
1947 blit.mask = util_format_get_mask(pt->format) & ~PIPE_MASK_Z;
1948 else
1949 blit.mask = util_format_get_mask(pt->format);
1950 blit.filter = PIPE_TEX_FILTER_NEAREST;
1951
1952 pipe->blit(pipe, &blit);
1953 }
1954
1955 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1956 * textured quad with that texture.
1957 */
1958
1959 draw_textured_quad(ctx, dstx, dsty, get_effective_raster_z(ctx),
1960 width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1961 sv,
1962 num_sampler_view,
1963 st->passthrough_vs,
1964 driver_fp, fpv,
1965 ctx->Current.Attrib[VERT_ATTRIB_COLOR0],
1966 invertTex, write_depth, write_stencil);
1967
1968 pipe_resource_reference(&pt, NULL);
1969 pipe_sampler_view_reference(&sv[0], NULL);
1970 }
1971
1972
1973
st_init_drawpixels_functions(struct dd_function_table * functions)1974 void st_init_drawpixels_functions(struct dd_function_table *functions)
1975 {
1976 functions->DrawPixels = st_DrawPixels;
1977 functions->CopyPixels = st_CopyPixels;
1978 }
1979
1980
1981 void
st_destroy_drawpix(struct st_context * st)1982 st_destroy_drawpix(struct st_context *st)
1983 {
1984 GLuint i;
1985
1986 for (i = 0; i < ARRAY_SIZE(st->drawpix.zs_shaders); i++) {
1987 if (st->drawpix.zs_shaders[i])
1988 st->pipe->delete_fs_state(st->pipe, st->drawpix.zs_shaders[i]);
1989 }
1990
1991 if (st->passthrough_vs)
1992 st->pipe->delete_vs_state(st->pipe, st->passthrough_vs);
1993
1994 /* Free cache data */
1995 for (i = 0; i < ARRAY_SIZE(st->drawpix_cache.entries); i++) {
1996 struct drawpix_cache_entry *entry = &st->drawpix_cache.entries[i];
1997 free(entry->image);
1998 pipe_resource_reference(&entry->texture, NULL);
1999 }
2000 }
2001