st_cb_drawpixels.c revision 36c93a6fae275614b6004ec5ab085774d527e1bc
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_drawpixels.h" 54#include "st_cb_readpixels.h" 55#include "st_cb_fbo.h" 56#include "st_context.h" 57#include "st_debug.h" 58#include "st_format.h" 59#include "st_program.h" 60#include "st_texture.h" 61 62#include "pipe/p_context.h" 63#include "pipe/p_defines.h" 64#include "tgsi/tgsi_ureg.h" 65#include "util/u_draw_quad.h" 66#include "util/u_format.h" 67#include "util/u_inlines.h" 68#include "util/u_math.h" 69#include "util/u_tile.h" 70#include "util/u_upload_mgr.h" 71#include "cso_cache/cso_context.h" 72 73 74/** 75 * Create fragment program that does a TEX() instruction to get a Z and/or 76 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL. 77 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX). 78 * Pass fragment color through as-is. 79 * 80 * \return CSO of the fragment shader. 81 */ 82static void * 83get_drawpix_z_stencil_program(struct st_context *st, 84 GLboolean write_depth, 85 GLboolean write_stencil) 86{ 87 struct ureg_program *ureg; 88 struct ureg_src depth_sampler, stencil_sampler; 89 struct ureg_src texcoord, color; 90 struct ureg_dst out_color, out_depth, out_stencil; 91 const GLuint shaderIndex = write_depth * 2 + write_stencil; 92 void *cso; 93 94 assert(shaderIndex < ARRAY_SIZE(st->drawpix.zs_shaders)); 95 96 if (st->drawpix.zs_shaders[shaderIndex]) { 97 /* already have the proper shader */ 98 return st->drawpix.zs_shaders[shaderIndex]; 99 } 100 101 ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT); 102 if (ureg == NULL) 103 return NULL; 104 105 ureg_property(ureg, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS, TRUE); 106 107 if (write_depth) { 108 color = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_COLOR, 0, 109 TGSI_INTERPOLATE_COLOR); 110 out_color = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0); 111 112 depth_sampler = ureg_DECL_sampler(ureg, 0); 113 out_depth = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0); 114 } 115 116 if (write_stencil) { 117 stencil_sampler = ureg_DECL_sampler(ureg, 1); 118 out_stencil = ureg_DECL_output(ureg, TGSI_SEMANTIC_STENCIL, 0); 119 } 120 121 texcoord = ureg_DECL_fs_input(ureg, 122 st->needs_texcoord_semantic ? 123 TGSI_SEMANTIC_TEXCOORD : 124 TGSI_SEMANTIC_GENERIC, 125 0, TGSI_INTERPOLATE_LINEAR); 126 127 if (write_depth) { 128 ureg_TEX(ureg, ureg_writemask(out_depth, TGSI_WRITEMASK_Z), 129 TGSI_TEXTURE_2D, texcoord, depth_sampler); 130 ureg_MOV(ureg, out_color, color); 131 } 132 133 if (write_stencil) 134 ureg_TEX(ureg, ureg_writemask(out_stencil, TGSI_WRITEMASK_Y), 135 TGSI_TEXTURE_2D, texcoord, stencil_sampler); 136 137 ureg_END(ureg); 138 cso = ureg_create_shader_and_destroy(ureg, st->pipe); 139 140 /* save the new shader */ 141 st->drawpix.zs_shaders[shaderIndex] = cso; 142 return cso; 143} 144 145 146/** 147 * Create a simple vertex shader that just passes through the 148 * vertex position and texcoord (and optionally, color). 149 */ 150static void * 151make_passthrough_vertex_shader(struct st_context *st, 152 GLboolean passColor) 153{ 154 const unsigned texcoord_semantic = st->needs_texcoord_semantic ? 155 TGSI_SEMANTIC_TEXCOORD : TGSI_SEMANTIC_GENERIC; 156 157 if (!st->drawpix.vert_shaders[passColor]) { 158 struct ureg_program *ureg = ureg_create( TGSI_PROCESSOR_VERTEX ); 159 160 if (ureg == NULL) 161 return NULL; 162 163 /* MOV result.pos, vertex.pos; */ 164 ureg_MOV(ureg, 165 ureg_DECL_output( ureg, TGSI_SEMANTIC_POSITION, 0 ), 166 ureg_DECL_vs_input( ureg, 0 )); 167 168 /* MOV result.texcoord0, vertex.attr[1]; */ 169 ureg_MOV(ureg, 170 ureg_DECL_output( ureg, texcoord_semantic, 0 ), 171 ureg_DECL_vs_input( ureg, 1 )); 172 173 if (passColor) { 174 /* MOV result.color0, vertex.attr[2]; */ 175 ureg_MOV(ureg, 176 ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 ), 177 ureg_DECL_vs_input( ureg, 2 )); 178 } 179 180 ureg_END( ureg ); 181 182 st->drawpix.vert_shaders[passColor] = 183 ureg_create_shader_and_destroy( ureg, st->pipe ); 184 } 185 186 return st->drawpix.vert_shaders[passColor]; 187} 188 189 190/** 191 * Return a texture internalFormat for drawing/copying an image 192 * of the given format and type. 193 */ 194static GLenum 195internal_format(struct gl_context *ctx, GLenum format, GLenum type) 196{ 197 switch (format) { 198 case GL_DEPTH_COMPONENT: 199 switch (type) { 200 case GL_UNSIGNED_SHORT: 201 return GL_DEPTH_COMPONENT16; 202 203 case GL_UNSIGNED_INT: 204 return GL_DEPTH_COMPONENT32; 205 206 case GL_FLOAT: 207 if (ctx->Extensions.ARB_depth_buffer_float) 208 return GL_DEPTH_COMPONENT32F; 209 else 210 return GL_DEPTH_COMPONENT; 211 212 default: 213 return GL_DEPTH_COMPONENT; 214 } 215 216 case GL_DEPTH_STENCIL: 217 switch (type) { 218 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: 219 return GL_DEPTH32F_STENCIL8; 220 221 case GL_UNSIGNED_INT_24_8: 222 default: 223 return GL_DEPTH24_STENCIL8; 224 } 225 226 case GL_STENCIL_INDEX: 227 return GL_STENCIL_INDEX; 228 229 default: 230 if (_mesa_is_enum_format_integer(format)) { 231 switch (type) { 232 case GL_BYTE: 233 return GL_RGBA8I; 234 case GL_UNSIGNED_BYTE: 235 return GL_RGBA8UI; 236 case GL_SHORT: 237 return GL_RGBA16I; 238 case GL_UNSIGNED_SHORT: 239 return GL_RGBA16UI; 240 case GL_INT: 241 return GL_RGBA32I; 242 case GL_UNSIGNED_INT: 243 return GL_RGBA32UI; 244 default: 245 assert(0 && "Unexpected type in internal_format()"); 246 return GL_RGBA_INTEGER; 247 } 248 } 249 else { 250 switch (type) { 251 case GL_UNSIGNED_BYTE: 252 case GL_UNSIGNED_INT_8_8_8_8: 253 case GL_UNSIGNED_INT_8_8_8_8_REV: 254 default: 255 return GL_RGBA8; 256 257 case GL_UNSIGNED_BYTE_3_3_2: 258 case GL_UNSIGNED_BYTE_2_3_3_REV: 259 return GL_R3_G3_B2; 260 261 case GL_UNSIGNED_SHORT_4_4_4_4: 262 case GL_UNSIGNED_SHORT_4_4_4_4_REV: 263 return GL_RGBA4; 264 265 case GL_UNSIGNED_SHORT_5_6_5: 266 case GL_UNSIGNED_SHORT_5_6_5_REV: 267 return GL_RGB565; 268 269 case GL_UNSIGNED_SHORT_5_5_5_1: 270 case GL_UNSIGNED_SHORT_1_5_5_5_REV: 271 return GL_RGB5_A1; 272 273 case GL_UNSIGNED_INT_10_10_10_2: 274 case GL_UNSIGNED_INT_2_10_10_10_REV: 275 return GL_RGB10_A2; 276 277 case GL_UNSIGNED_SHORT: 278 case GL_UNSIGNED_INT: 279 return GL_RGBA16; 280 281 case GL_BYTE: 282 return 283 ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8; 284 285 case GL_SHORT: 286 case GL_INT: 287 return 288 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 289 290 case GL_HALF_FLOAT_ARB: 291 return 292 ctx->Extensions.ARB_texture_float ? GL_RGBA16F : 293 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 294 295 case GL_FLOAT: 296 case GL_DOUBLE: 297 return 298 ctx->Extensions.ARB_texture_float ? GL_RGBA32F : 299 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 300 301 case GL_UNSIGNED_INT_5_9_9_9_REV: 302 assert(ctx->Extensions.EXT_texture_shared_exponent); 303 return GL_RGB9_E5; 304 305 case GL_UNSIGNED_INT_10F_11F_11F_REV: 306 assert(ctx->Extensions.EXT_packed_float); 307 return GL_R11F_G11F_B10F; 308 } 309 } 310 } 311} 312 313 314/** 315 * Create a temporary texture to hold an image of the given size. 316 * If width, height are not POT and the driver only handles POT textures, 317 * allocate the next larger size of texture that is POT. 318 */ 319static struct pipe_resource * 320alloc_texture(struct st_context *st, GLsizei width, GLsizei height, 321 enum pipe_format texFormat, unsigned bind) 322{ 323 struct pipe_resource *pt; 324 325 pt = st_texture_create(st, st->internal_target, texFormat, 0, 326 width, height, 1, 1, 0, bind); 327 328 return pt; 329} 330 331 332/** 333 * Make texture containing an image for glDrawPixels image. 334 * If 'pixels' is NULL, leave the texture image data undefined. 335 */ 336static struct pipe_resource * 337make_texture(struct st_context *st, 338 GLsizei width, GLsizei height, GLenum format, GLenum type, 339 const struct gl_pixelstore_attrib *unpack, 340 const GLvoid *pixels) 341{ 342 struct gl_context *ctx = st->ctx; 343 struct pipe_context *pipe = st->pipe; 344 mesa_format mformat; 345 struct pipe_resource *pt; 346 enum pipe_format pipeFormat; 347 GLenum baseInternalFormat; 348 349 /* Choose a pixel format for the temp texture which will hold the 350 * image to draw. 351 */ 352 pipeFormat = st_choose_matching_format(st, PIPE_BIND_SAMPLER_VIEW, 353 format, type, unpack->SwapBytes); 354 355 if (pipeFormat == PIPE_FORMAT_NONE) { 356 /* Use the generic approach. */ 357 GLenum intFormat = internal_format(ctx, format, type); 358 359 pipeFormat = st_choose_format(st, intFormat, format, type, 360 PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW, 361 FALSE); 362 assert(pipeFormat != PIPE_FORMAT_NONE); 363 } 364 365 mformat = st_pipe_format_to_mesa_format(pipeFormat); 366 baseInternalFormat = _mesa_get_format_base_format(mformat); 367 368 pixels = _mesa_map_pbo_source(ctx, unpack, pixels); 369 if (!pixels) 370 return NULL; 371 372 /* alloc temporary texture */ 373 pt = alloc_texture(st, width, height, pipeFormat, PIPE_BIND_SAMPLER_VIEW); 374 if (!pt) { 375 _mesa_unmap_pbo_source(ctx, unpack); 376 return NULL; 377 } 378 379 { 380 struct pipe_transfer *transfer; 381 GLboolean success; 382 GLubyte *dest; 383 const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; 384 385 /* we'll do pixel transfer in a fragment shader */ 386 ctx->_ImageTransferState = 0x0; 387 388 /* map texture transfer */ 389 dest = pipe_transfer_map(pipe, pt, 0, 0, 390 PIPE_TRANSFER_WRITE, 0, 0, 391 width, height, &transfer); 392 393 394 /* Put image into texture transfer. 395 * Note that the image is actually going to be upside down in 396 * the texture. We deal with that with texcoords. 397 */ 398 if ((format == GL_RGBA || format == GL_BGRA) 399 && type == GL_UNSIGNED_BYTE) { 400 /* Use a memcpy-based texstore to avoid software pixel swizzling. 401 * We'll do the necessary swizzling with the pipe_sampler_view to 402 * give much better performance. 403 * XXX in the future, expand this to accomodate more format and 404 * type combinations. 405 */ 406 _mesa_memcpy_texture(ctx, 2, 407 mformat, /* mesa_format */ 408 transfer->stride, /* dstRowStride, bytes */ 409 &dest, /* destSlices */ 410 width, height, 1, /* size */ 411 format, type, /* src format/type */ 412 pixels, /* data source */ 413 unpack); 414 success = GL_TRUE; 415 } 416 else { 417 success = _mesa_texstore(ctx, 2, /* dims */ 418 baseInternalFormat, /* baseInternalFormat */ 419 mformat, /* mesa_format */ 420 transfer->stride, /* dstRowStride, bytes */ 421 &dest, /* destSlices */ 422 width, height, 1, /* size */ 423 format, type, /* src format/type */ 424 pixels, /* data source */ 425 unpack); 426 } 427 428 /* unmap */ 429 pipe_transfer_unmap(pipe, transfer); 430 431 assert(success); 432 433 /* restore */ 434 ctx->_ImageTransferState = imageTransferStateSave; 435 } 436 437 _mesa_unmap_pbo_source(ctx, unpack); 438 439 return pt; 440} 441 442 443/** 444 * Draw quad with texcoords and optional color. 445 * Coords are gallium window coords with y=0=top. 446 * \param color may be null 447 * \param invertTex if true, flip texcoords vertically 448 */ 449static void 450draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z, 451 GLfloat x1, GLfloat y1, const GLfloat *color, 452 GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord) 453{ 454 struct st_context *st = st_context(ctx); 455 struct pipe_context *pipe = st->pipe; 456 GLfloat (*verts)[3][4]; /* four verts, three attribs, XYZW */ 457 struct pipe_resource *buf = NULL; 458 unsigned offset; 459 460 u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), &offset, 461 &buf, (void **) &verts); 462 if (!buf) { 463 return; 464 } 465 466 /* setup vertex data */ 467 { 468 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 469 const GLfloat fb_width = (GLfloat) fb->Width; 470 const GLfloat fb_height = (GLfloat) fb->Height; 471 const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f; 472 const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f; 473 const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f; 474 const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f; 475 const GLfloat sLeft = 0.0f, sRight = maxXcoord; 476 const GLfloat tTop = invertTex ? maxYcoord : 0.0f; 477 const GLfloat tBot = invertTex ? 0.0f : maxYcoord; 478 GLuint i; 479 480 /* upper-left */ 481 verts[0][0][0] = clip_x0; /* v[0].attr[0].x */ 482 verts[0][0][1] = clip_y0; /* v[0].attr[0].y */ 483 484 /* upper-right */ 485 verts[1][0][0] = clip_x1; 486 verts[1][0][1] = clip_y0; 487 488 /* lower-right */ 489 verts[2][0][0] = clip_x1; 490 verts[2][0][1] = clip_y1; 491 492 /* lower-left */ 493 verts[3][0][0] = clip_x0; 494 verts[3][0][1] = clip_y1; 495 496 verts[0][1][0] = sLeft; /* v[0].attr[1].S */ 497 verts[0][1][1] = tTop; /* v[0].attr[1].T */ 498 verts[1][1][0] = sRight; 499 verts[1][1][1] = tTop; 500 verts[2][1][0] = sRight; 501 verts[2][1][1] = tBot; 502 verts[3][1][0] = sLeft; 503 verts[3][1][1] = tBot; 504 505 /* same for all verts: */ 506 if (color) { 507 for (i = 0; i < 4; i++) { 508 verts[i][0][2] = z; /* v[i].attr[0].z */ 509 verts[i][0][3] = 1.0f; /* v[i].attr[0].w */ 510 verts[i][2][0] = color[0]; /* v[i].attr[2].r */ 511 verts[i][2][1] = color[1]; /* v[i].attr[2].g */ 512 verts[i][2][2] = color[2]; /* v[i].attr[2].b */ 513 verts[i][2][3] = color[3]; /* v[i].attr[2].a */ 514 verts[i][1][2] = 0.0f; /* v[i].attr[1].R */ 515 verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */ 516 } 517 } 518 else { 519 for (i = 0; i < 4; i++) { 520 verts[i][0][2] = z; /*Z*/ 521 verts[i][0][3] = 1.0f; /*W*/ 522 verts[i][1][2] = 0.0f; /*R*/ 523 verts[i][1][3] = 1.0f; /*Q*/ 524 } 525 } 526 } 527 528 u_upload_unmap(st->uploader); 529 util_draw_vertex_buffer(pipe, st->cso_context, buf, 530 cso_get_aux_vertex_buffer_slot(st->cso_context), 531 offset, 532 PIPE_PRIM_QUADS, 533 4, /* verts */ 534 3); /* attribs/vert */ 535 pipe_resource_reference(&buf, NULL); 536} 537 538 539 540static void 541draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 542 GLsizei width, GLsizei height, 543 GLfloat zoomX, GLfloat zoomY, 544 struct pipe_sampler_view **sv, 545 int num_sampler_view, 546 void *driver_vp, 547 void *driver_fp, 548 struct st_fp_variant *fpv, 549 const GLfloat *color, 550 GLboolean invertTex, 551 GLboolean write_depth, GLboolean write_stencil) 552{ 553 struct st_context *st = st_context(ctx); 554 struct pipe_context *pipe = st->pipe; 555 struct cso_context *cso = st->cso_context; 556 GLfloat x0, y0, x1, y1; 557 GLsizei maxSize; 558 boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT; 559 560 /* limit checks */ 561 /* XXX if DrawPixels image is larger than max texture size, break 562 * it up into chunks. 563 */ 564 maxSize = 1 << (pipe->screen->get_param(pipe->screen, 565 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 566 assert(width <= maxSize); 567 assert(height <= maxSize); 568 569 cso_save_rasterizer(cso); 570 cso_save_viewport(cso); 571 cso_save_fragment_samplers(cso); 572 cso_save_fragment_sampler_views(cso); 573 cso_save_fragment_shader(cso); 574 cso_save_stream_outputs(cso); 575 cso_save_vertex_shader(cso); 576 cso_save_tessctrl_shader(cso); 577 cso_save_tesseval_shader(cso); 578 cso_save_geometry_shader(cso); 579 cso_save_vertex_elements(cso); 580 cso_save_aux_vertex_buffer_slot(cso); 581 if (write_stencil) { 582 cso_save_depth_stencil_alpha(cso); 583 cso_save_blend(cso); 584 } 585 586 /* rasterizer state: just scissor */ 587 { 588 struct pipe_rasterizer_state rasterizer; 589 memset(&rasterizer, 0, sizeof(rasterizer)); 590 rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader && 591 ctx->Color._ClampFragmentColor; 592 rasterizer.half_pixel_center = 1; 593 rasterizer.bottom_edge_rule = 1; 594 rasterizer.depth_clip = !ctx->Transform.DepthClamp; 595 rasterizer.scissor = ctx->Scissor.EnableFlags; 596 cso_set_rasterizer(cso, &rasterizer); 597 } 598 599 if (write_stencil) { 600 /* Stencil writing bypasses the normal fragment pipeline to 601 * disable color writing and set stencil test to always pass. 602 */ 603 struct pipe_depth_stencil_alpha_state dsa; 604 struct pipe_blend_state blend; 605 606 /* depth/stencil */ 607 memset(&dsa, 0, sizeof(dsa)); 608 dsa.stencil[0].enabled = 1; 609 dsa.stencil[0].func = PIPE_FUNC_ALWAYS; 610 dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; 611 dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE; 612 if (write_depth) { 613 /* writing depth+stencil: depth test always passes */ 614 dsa.depth.enabled = 1; 615 dsa.depth.writemask = ctx->Depth.Mask; 616 dsa.depth.func = PIPE_FUNC_ALWAYS; 617 } 618 cso_set_depth_stencil_alpha(cso, &dsa); 619 620 /* blend (colormask) */ 621 memset(&blend, 0, sizeof(blend)); 622 cso_set_blend(cso, &blend); 623 } 624 625 /* fragment shader state: TEX lookup program */ 626 cso_set_fragment_shader_handle(cso, driver_fp); 627 628 /* vertex shader state: position + texcoord pass-through */ 629 cso_set_vertex_shader_handle(cso, driver_vp); 630 631 /* disable other shaders */ 632 cso_set_tessctrl_shader_handle(cso, NULL); 633 cso_set_tesseval_shader_handle(cso, NULL); 634 cso_set_geometry_shader_handle(cso, NULL); 635 636 /* user samplers, plus the drawpix samplers */ 637 { 638 struct pipe_sampler_state sampler; 639 640 memset(&sampler, 0, sizeof(sampler)); 641 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP; 642 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP; 643 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP; 644 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 645 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 646 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 647 sampler.normalized_coords = normalized; 648 649 if (fpv) { 650 const struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 651 uint num = MAX2(MAX2(fpv->drawpix_sampler, fpv->pixelmap_sampler) + 1, 652 st->state.num_samplers[PIPE_SHADER_FRAGMENT]); 653 uint i; 654 655 for (i = 0; i < st->state.num_samplers[PIPE_SHADER_FRAGMENT]; i++) 656 samplers[i] = &st->state.samplers[PIPE_SHADER_FRAGMENT][i]; 657 658 samplers[fpv->drawpix_sampler] = &sampler; 659 if (sv[1]) 660 samplers[fpv->pixelmap_sampler] = &sampler; 661 662 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num, samplers); 663 } else { 664 const struct pipe_sampler_state *samplers[2] = {&sampler, &sampler}; 665 666 cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, samplers); 667 } 668 } 669 670 /* viewport state: viewport matching window dims */ 671 { 672 const float w = (float) ctx->DrawBuffer->Width; 673 const float h = (float) ctx->DrawBuffer->Height; 674 struct pipe_viewport_state vp; 675 vp.scale[0] = 0.5f * w; 676 vp.scale[1] = -0.5f * h; 677 vp.scale[2] = 0.5f; 678 vp.translate[0] = 0.5f * w; 679 vp.translate[1] = 0.5f * h; 680 vp.translate[2] = 0.5f; 681 cso_set_viewport(cso, &vp); 682 } 683 684 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 685 cso_set_stream_outputs(st->cso_context, 0, NULL, NULL); 686 687 /* user textures, plus the drawpix textures */ 688 if (fpv) { 689 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 690 uint num = MAX3(fpv->drawpix_sampler + 1, 691 fpv->pixelmap_sampler + 1, 692 st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]); 693 694 memcpy(sampler_views, st->state.sampler_views[PIPE_SHADER_FRAGMENT], 695 sizeof(sampler_views)); 696 697 sampler_views[fpv->drawpix_sampler] = sv[0]; 698 if (sv[1]) 699 sampler_views[fpv->pixelmap_sampler] = sv[1]; 700 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num, sampler_views); 701 } else 702 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv); 703 704 /* Compute Gallium window coords (y=0=top) with pixel zoom. 705 * Recall that these coords are transformed by the current 706 * vertex shader and viewport transformation. 707 */ 708 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) { 709 y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY); 710 invertTex = !invertTex; 711 } 712 713 x0 = (GLfloat) x; 714 x1 = x + width * ctx->Pixel.ZoomX; 715 y0 = (GLfloat) y; 716 y1 = y + height * ctx->Pixel.ZoomY; 717 718 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 719 z = z * 2.0f - 1.0f; 720 721 draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex, 722 normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width, 723 normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height); 724 725 /* restore state */ 726 cso_restore_rasterizer(cso); 727 cso_restore_viewport(cso); 728 cso_restore_fragment_samplers(cso); 729 cso_restore_fragment_sampler_views(cso); 730 cso_restore_fragment_shader(cso); 731 cso_restore_vertex_shader(cso); 732 cso_restore_tessctrl_shader(cso); 733 cso_restore_tesseval_shader(cso); 734 cso_restore_geometry_shader(cso); 735 cso_restore_vertex_elements(cso); 736 cso_restore_aux_vertex_buffer_slot(cso); 737 cso_restore_stream_outputs(cso); 738 if (write_stencil) { 739 cso_restore_depth_stencil_alpha(cso); 740 cso_restore_blend(cso); 741 } 742} 743 744 745/** 746 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we 747 * can't use a fragment shader to write stencil values. 748 */ 749static void 750draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, 751 GLsizei width, GLsizei height, GLenum format, GLenum type, 752 const struct gl_pixelstore_attrib *unpack, 753 const GLvoid *pixels) 754{ 755 struct st_context *st = st_context(ctx); 756 struct pipe_context *pipe = st->pipe; 757 struct st_renderbuffer *strb; 758 enum pipe_transfer_usage usage; 759 struct pipe_transfer *pt; 760 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; 761 ubyte *stmap; 762 struct gl_pixelstore_attrib clippedUnpack = *unpack; 763 GLubyte *sValues; 764 GLuint *zValues; 765 766 if (!zoom) { 767 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, 768 &clippedUnpack)) { 769 /* totally clipped */ 770 return; 771 } 772 } 773 774 strb = st_renderbuffer(ctx->DrawBuffer-> 775 Attachment[BUFFER_STENCIL].Renderbuffer); 776 777 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 778 y = ctx->DrawBuffer->Height - y - height; 779 } 780 781 if (format == GL_STENCIL_INDEX && 782 _mesa_is_format_packed_depth_stencil(strb->Base.Format)) { 783 /* writing stencil to a combined depth+stencil buffer */ 784 usage = PIPE_TRANSFER_READ_WRITE; 785 } 786 else { 787 usage = PIPE_TRANSFER_WRITE; 788 } 789 790 stmap = pipe_transfer_map(pipe, strb->texture, 791 strb->surface->u.tex.level, 792 strb->surface->u.tex.first_layer, 793 usage, x, y, 794 width, height, &pt); 795 796 pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels); 797 assert(pixels); 798 799 sValues = malloc(width * sizeof(GLubyte)); 800 zValues = malloc(width * sizeof(GLuint)); 801 802 if (sValues && zValues) { 803 GLint row; 804 for (row = 0; row < height; row++) { 805 GLfloat *zValuesFloat = (GLfloat*)zValues; 806 GLenum destType = GL_UNSIGNED_BYTE; 807 const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels, 808 width, height, 809 format, type, 810 row, 0); 811 _mesa_unpack_stencil_span(ctx, width, destType, sValues, 812 type, source, &clippedUnpack, 813 ctx->_ImageTransferState); 814 815 if (format == GL_DEPTH_STENCIL) { 816 GLenum ztype = 817 pt->resource->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT ? 818 GL_FLOAT : GL_UNSIGNED_INT; 819 820 _mesa_unpack_depth_span(ctx, width, ztype, zValues, 821 (1 << 24) - 1, type, source, 822 &clippedUnpack); 823 } 824 825 if (zoom) { 826 _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with " 827 "zoom not complete"); 828 } 829 830 { 831 GLint spanY; 832 833 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 834 spanY = height - row - 1; 835 } 836 else { 837 spanY = row; 838 } 839 840 /* now pack the stencil (and Z) values in the dest format */ 841 switch (pt->resource->format) { 842 case PIPE_FORMAT_S8_UINT: 843 { 844 ubyte *dest = stmap + spanY * pt->stride; 845 assert(usage == PIPE_TRANSFER_WRITE); 846 memcpy(dest, sValues, width); 847 } 848 break; 849 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 850 if (format == GL_DEPTH_STENCIL) { 851 uint *dest = (uint *) (stmap + spanY * pt->stride); 852 GLint k; 853 assert(usage == PIPE_TRANSFER_WRITE); 854 for (k = 0; k < width; k++) { 855 dest[k] = zValues[k] | (sValues[k] << 24); 856 } 857 } 858 else { 859 uint *dest = (uint *) (stmap + spanY * pt->stride); 860 GLint k; 861 assert(usage == PIPE_TRANSFER_READ_WRITE); 862 for (k = 0; k < width; k++) { 863 dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24); 864 } 865 } 866 break; 867 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 868 if (format == GL_DEPTH_STENCIL) { 869 uint *dest = (uint *) (stmap + spanY * pt->stride); 870 GLint k; 871 assert(usage == PIPE_TRANSFER_WRITE); 872 for (k = 0; k < width; k++) { 873 dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff); 874 } 875 } 876 else { 877 uint *dest = (uint *) (stmap + spanY * pt->stride); 878 GLint k; 879 assert(usage == PIPE_TRANSFER_READ_WRITE); 880 for (k = 0; k < width; k++) { 881 dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff); 882 } 883 } 884 break; 885 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 886 if (format == GL_DEPTH_STENCIL) { 887 uint *dest = (uint *) (stmap + spanY * pt->stride); 888 GLfloat *destf = (GLfloat*)dest; 889 GLint k; 890 assert(usage == PIPE_TRANSFER_WRITE); 891 for (k = 0; k < width; k++) { 892 destf[k*2] = zValuesFloat[k]; 893 dest[k*2+1] = sValues[k] & 0xff; 894 } 895 } 896 else { 897 uint *dest = (uint *) (stmap + spanY * pt->stride); 898 GLint k; 899 assert(usage == PIPE_TRANSFER_READ_WRITE); 900 for (k = 0; k < width; k++) { 901 dest[k*2+1] = sValues[k] & 0xff; 902 } 903 } 904 break; 905 default: 906 assert(0); 907 } 908 } 909 } 910 } 911 else { 912 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels()"); 913 } 914 915 free(sValues); 916 free(zValues); 917 918 _mesa_unmap_pbo_source(ctx, &clippedUnpack); 919 920 /* unmap the stencil buffer */ 921 pipe_transfer_unmap(pipe, pt); 922} 923 924 925/** 926 * Get fragment program variant for a glDrawPixels or glCopyPixels 927 * command for RGBA data. 928 */ 929static struct st_fp_variant * 930get_color_fp_variant(struct st_context *st) 931{ 932 struct gl_context *ctx = st->ctx; 933 struct st_fp_variant_key key; 934 struct st_fp_variant *fpv; 935 936 memset(&key, 0, sizeof(key)); 937 938 key.st = st->has_shareable_shaders ? NULL : st; 939 key.drawpixels = 1; 940 key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 || 941 ctx->Pixel.RedScale != 1.0 || 942 ctx->Pixel.GreenBias != 0.0 || 943 ctx->Pixel.GreenScale != 1.0 || 944 ctx->Pixel.BlueBias != 0.0 || 945 ctx->Pixel.BlueScale != 1.0 || 946 ctx->Pixel.AlphaBias != 0.0 || 947 ctx->Pixel.AlphaScale != 1.0); 948 key.pixelMaps = ctx->Pixel.MapColorFlag; 949 key.clamp_color = st->clamp_frag_color_in_shader && 950 st->ctx->Color._ClampFragmentColor; 951 952 fpv = st_get_fp_variant(st, st->fp, &key); 953 954 return fpv; 955} 956 957 958/** 959 * Clamp glDrawPixels width and height to the maximum texture size. 960 */ 961static void 962clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height, 963 struct gl_pixelstore_attrib *unpack) 964{ 965 const int maxSize = 966 1 << (pipe->screen->get_param(pipe->screen, 967 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 968 969 if (*width > maxSize) { 970 if (unpack->RowLength == 0) 971 unpack->RowLength = *width; 972 *width = maxSize; 973 } 974 if (*height > maxSize) { 975 *height = maxSize; 976 } 977} 978 979 980/** 981 * Search the array of 4 swizzle components for the named component and return 982 * its position. 983 */ 984static unsigned 985search_swizzle(const unsigned char swizzle[4], unsigned component) 986{ 987 unsigned i; 988 for (i = 0; i < 4; i++) { 989 if (swizzle[i] == component) 990 return i; 991 } 992 assert(!"search_swizzle() failed"); 993 return 0; 994} 995 996 997/** 998 * Set the sampler view's swizzle terms. This is used to handle RGBA 999 * swizzling when the incoming image format isn't an exact match for 1000 * the actual texture format. For example, if we have glDrawPixels( 1001 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format 1002 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to 1003 * avoid swizzling all the pixels in software in the texstore code. 1004 */ 1005static void 1006setup_sampler_swizzle(struct pipe_sampler_view *sv, GLenum format, GLenum type) 1007{ 1008 if ((format == GL_RGBA || format == GL_BGRA) && type == GL_UNSIGNED_BYTE) { 1009 const struct util_format_description *desc = 1010 util_format_description(sv->texture->format); 1011 unsigned c0, c1, c2, c3; 1012 1013 /* Every gallium driver supports at least one 32-bit packed RGBA format. 1014 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE). 1015 */ 1016 assert(desc->block.bits == 32); 1017 1018 /* invert the format's swizzle to setup the sampler's swizzle */ 1019 if (format == GL_RGBA) { 1020 c0 = UTIL_FORMAT_SWIZZLE_X; 1021 c1 = UTIL_FORMAT_SWIZZLE_Y; 1022 c2 = UTIL_FORMAT_SWIZZLE_Z; 1023 c3 = UTIL_FORMAT_SWIZZLE_W; 1024 } 1025 else { 1026 assert(format == GL_BGRA); 1027 c0 = UTIL_FORMAT_SWIZZLE_Z; 1028 c1 = UTIL_FORMAT_SWIZZLE_Y; 1029 c2 = UTIL_FORMAT_SWIZZLE_X; 1030 c3 = UTIL_FORMAT_SWIZZLE_W; 1031 } 1032 sv->swizzle_r = search_swizzle(desc->swizzle, c0); 1033 sv->swizzle_g = search_swizzle(desc->swizzle, c1); 1034 sv->swizzle_b = search_swizzle(desc->swizzle, c2); 1035 sv->swizzle_a = search_swizzle(desc->swizzle, c3); 1036 } 1037 else { 1038 /* use the default sampler swizzle */ 1039 } 1040} 1041 1042 1043/** 1044 * Called via ctx->Driver.DrawPixels() 1045 */ 1046static void 1047st_DrawPixels(struct gl_context *ctx, GLint x, GLint y, 1048 GLsizei width, GLsizei height, 1049 GLenum format, GLenum type, 1050 const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) 1051{ 1052 void *driver_vp, *driver_fp; 1053 struct st_context *st = st_context(ctx); 1054 const GLfloat *color; 1055 struct pipe_context *pipe = st->pipe; 1056 GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE; 1057 struct pipe_sampler_view *sv[2] = { NULL }; 1058 int num_sampler_view = 1; 1059 struct gl_pixelstore_attrib clippedUnpack; 1060 struct st_fp_variant *fpv = NULL; 1061 struct pipe_resource *pt; 1062 1063 /* Mesa state should be up to date by now */ 1064 assert(ctx->NewState == 0x0); 1065 1066 st_validate_state(st); 1067 1068 /* Limit the size of the glDrawPixels to the max texture size. 1069 * Strictly speaking, that's not correct but since we don't handle 1070 * larger images yet, this is better than crashing. 1071 */ 1072 clippedUnpack = *unpack; 1073 unpack = &clippedUnpack; 1074 clamp_size(st->pipe, &width, &height, &clippedUnpack); 1075 1076 if (format == GL_DEPTH_STENCIL) 1077 write_stencil = write_depth = GL_TRUE; 1078 else if (format == GL_STENCIL_INDEX) 1079 write_stencil = GL_TRUE; 1080 else if (format == GL_DEPTH_COMPONENT) 1081 write_depth = GL_TRUE; 1082 1083 if (write_stencil && 1084 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) { 1085 /* software fallback */ 1086 draw_stencil_pixels(ctx, x, y, width, height, format, type, 1087 unpack, pixels); 1088 return; 1089 } 1090 1091 /* 1092 * Get vertex/fragment shaders 1093 */ 1094 if (write_depth || write_stencil) { 1095 driver_fp = get_drawpix_z_stencil_program(st, write_depth, 1096 write_stencil); 1097 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); 1098 color = ctx->Current.RasterColor; 1099 } 1100 else { 1101 fpv = get_color_fp_variant(st); 1102 1103 driver_fp = fpv->driver_shader; 1104 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); 1105 1106 color = NULL; 1107 if (ctx->Pixel.MapColorFlag) { 1108 pipe_sampler_view_reference(&sv[1], 1109 st->pixel_xfer.pixelmap_sampler_view); 1110 num_sampler_view++; 1111 } 1112 1113 /* compiling a new fragment shader variant added new state constants 1114 * into the constant buffer, we need to update them 1115 */ 1116 st_upload_constants(st, st->fp->Base.Base.Parameters, 1117 PIPE_SHADER_FRAGMENT); 1118 } 1119 1120 /* Put glDrawPixels image into a texture */ 1121 pt = make_texture(st, width, height, format, type, unpack, pixels); 1122 if (!pt) { 1123 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); 1124 return; 1125 } 1126 1127 /* create sampler view for the image */ 1128 sv[0] = st_create_texture_sampler_view(st->pipe, pt); 1129 if (!sv[0]) { 1130 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); 1131 pipe_resource_reference(&pt, NULL); 1132 return; 1133 } 1134 1135 /* Set up the sampler view's swizzle */ 1136 setup_sampler_swizzle(sv[0], format, type); 1137 1138 /* Create a second sampler view to read stencil. The stencil is 1139 * written using the shader stencil export functionality. 1140 */ 1141 if (write_stencil) { 1142 enum pipe_format stencil_format = 1143 util_format_stencil_only(pt->format); 1144 /* we should not be doing pixel map/transfer (see above) */ 1145 assert(num_sampler_view == 1); 1146 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt, 1147 stencil_format); 1148 if (!sv[1]) { 1149 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); 1150 pipe_resource_reference(&pt, NULL); 1151 pipe_sampler_view_reference(&sv[0], NULL); 1152 return; 1153 } 1154 num_sampler_view++; 1155 } 1156 1157 draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], 1158 width, height, 1159 ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, 1160 sv, 1161 num_sampler_view, 1162 driver_vp, 1163 driver_fp, fpv, 1164 color, GL_FALSE, write_depth, write_stencil); 1165 pipe_sampler_view_reference(&sv[0], NULL); 1166 if (num_sampler_view > 1) 1167 pipe_sampler_view_reference(&sv[1], NULL); 1168 1169 pipe_resource_reference(&pt, NULL); 1170} 1171 1172 1173 1174/** 1175 * Software fallback for glCopyPixels(GL_STENCIL). 1176 */ 1177static void 1178copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1179 GLsizei width, GLsizei height, 1180 GLint dstx, GLint dsty) 1181{ 1182 struct st_renderbuffer *rbDraw; 1183 struct pipe_context *pipe = st_context(ctx)->pipe; 1184 enum pipe_transfer_usage usage; 1185 struct pipe_transfer *ptDraw; 1186 ubyte *drawMap; 1187 ubyte *buffer; 1188 int i; 1189 1190 buffer = malloc(width * height * sizeof(ubyte)); 1191 if (!buffer) { 1192 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)"); 1193 return; 1194 } 1195 1196 /* Get the dest renderbuffer */ 1197 rbDraw = st_renderbuffer(ctx->DrawBuffer-> 1198 Attachment[BUFFER_STENCIL].Renderbuffer); 1199 1200 /* this will do stencil pixel transfer ops */ 1201 _mesa_readpixels(ctx, srcx, srcy, width, height, 1202 GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, 1203 &ctx->DefaultPacking, buffer); 1204 1205 if (0) { 1206 /* debug code: dump stencil values */ 1207 GLint row, col; 1208 for (row = 0; row < height; row++) { 1209 printf("%3d: ", row); 1210 for (col = 0; col < width; col++) { 1211 printf("%02x ", buffer[col + row * width]); 1212 } 1213 printf("\n"); 1214 } 1215 } 1216 1217 if (_mesa_is_format_packed_depth_stencil(rbDraw->Base.Format)) 1218 usage = PIPE_TRANSFER_READ_WRITE; 1219 else 1220 usage = PIPE_TRANSFER_WRITE; 1221 1222 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 1223 dsty = rbDraw->Base.Height - dsty - height; 1224 } 1225 1226 assert(util_format_get_blockwidth(rbDraw->texture->format) == 1); 1227 assert(util_format_get_blockheight(rbDraw->texture->format) == 1); 1228 1229 /* map the stencil buffer */ 1230 drawMap = pipe_transfer_map(pipe, 1231 rbDraw->texture, 1232 rbDraw->surface->u.tex.level, 1233 rbDraw->surface->u.tex.first_layer, 1234 usage, dstx, dsty, 1235 width, height, &ptDraw); 1236 1237 /* draw */ 1238 /* XXX PixelZoom not handled yet */ 1239 for (i = 0; i < height; i++) { 1240 ubyte *dst; 1241 const ubyte *src; 1242 int y; 1243 1244 y = i; 1245 1246 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 1247 y = height - y - 1; 1248 } 1249 1250 dst = drawMap + y * ptDraw->stride; 1251 src = buffer + i * width; 1252 1253 _mesa_pack_ubyte_stencil_row(rbDraw->Base.Format, width, src, dst); 1254 } 1255 1256 free(buffer); 1257 1258 /* unmap the stencil buffer */ 1259 pipe_transfer_unmap(pipe, ptDraw); 1260} 1261 1262 1263/** 1264 * Return renderbuffer to use for reading color pixels for glCopyPixels 1265 */ 1266static struct st_renderbuffer * 1267st_get_color_read_renderbuffer(struct gl_context *ctx) 1268{ 1269 struct gl_framebuffer *fb = ctx->ReadBuffer; 1270 struct st_renderbuffer *strb = 1271 st_renderbuffer(fb->_ColorReadBuffer); 1272 1273 return strb; 1274} 1275 1276 1277/** 1278 * Try to do a glCopyPixels for simple cases with a blit by calling 1279 * pipe->blit(). 1280 * 1281 * We can do this when we're copying color pixels (depth/stencil 1282 * eventually) with no pixel zoom, no pixel transfer ops, no 1283 * per-fragment ops, and the src/dest regions don't overlap. 1284 */ 1285static GLboolean 1286blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1287 GLsizei width, GLsizei height, 1288 GLint dstx, GLint dsty, GLenum type) 1289{ 1290 struct st_context *st = st_context(ctx); 1291 struct pipe_context *pipe = st->pipe; 1292 struct pipe_screen *screen = pipe->screen; 1293 struct gl_pixelstore_attrib pack, unpack; 1294 GLint readX, readY, readW, readH, drawX, drawY, drawW, drawH; 1295 1296 if (type == GL_COLOR && 1297 ctx->Pixel.ZoomX == 1.0 && 1298 ctx->Pixel.ZoomY == 1.0 && 1299 ctx->_ImageTransferState == 0x0 && 1300 !ctx->Color.BlendEnabled && 1301 !ctx->Color.AlphaEnabled && 1302 !ctx->Depth.Test && 1303 !ctx->Fog.Enabled && 1304 !ctx->Stencil.Enabled && 1305 !ctx->FragmentProgram.Enabled && 1306 !ctx->VertexProgram.Enabled && 1307 !ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT] && 1308 ctx->DrawBuffer->_NumColorDrawBuffers == 1 && 1309 !ctx->Query.CondRenderQuery && 1310 !ctx->Query.CurrentOcclusionObject) { 1311 struct st_renderbuffer *rbRead, *rbDraw; 1312 1313 /* 1314 * Clip the read region against the src buffer bounds. 1315 * We'll still allocate a temporary buffer/texture for the original 1316 * src region size but we'll only read the region which is on-screen. 1317 * This may mean that we draw garbage pixels into the dest region, but 1318 * that's expected. 1319 */ 1320 readX = srcx; 1321 readY = srcy; 1322 readW = width; 1323 readH = height; 1324 pack = ctx->DefaultPacking; 1325 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) 1326 return GL_TRUE; /* all done */ 1327 1328 /* clip against dest buffer bounds and scissor box */ 1329 drawX = dstx + pack.SkipPixels; 1330 drawY = dsty + pack.SkipRows; 1331 unpack = pack; 1332 if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack)) 1333 return GL_TRUE; /* all done */ 1334 1335 readX = readX - pack.SkipPixels + unpack.SkipPixels; 1336 readY = readY - pack.SkipRows + unpack.SkipRows; 1337 1338 drawW = readW; 1339 drawH = readH; 1340 1341 rbRead = st_get_color_read_renderbuffer(ctx); 1342 rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]); 1343 1344 /* Flip src/dst position depending on the orientation of buffers. */ 1345 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { 1346 readY = rbRead->Base.Height - readY; 1347 readH = -readH; 1348 } 1349 1350 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 1351 /* We can't flip the destination for pipe->blit, so we only adjust 1352 * its position and flip the source. 1353 */ 1354 drawY = rbDraw->Base.Height - drawY - drawH; 1355 readY += readH; 1356 readH = -readH; 1357 } 1358 1359 if (rbRead != rbDraw || 1360 !_mesa_regions_overlap(readX, readY, readX + readW, readY + readH, 1361 drawX, drawY, drawX + drawW, drawY + drawH)) { 1362 struct pipe_blit_info blit; 1363 1364 memset(&blit, 0, sizeof(blit)); 1365 blit.src.resource = rbRead->texture; 1366 blit.src.level = rbRead->surface->u.tex.level; 1367 blit.src.format = rbRead->texture->format; 1368 blit.src.box.x = readX; 1369 blit.src.box.y = readY; 1370 blit.src.box.z = rbRead->surface->u.tex.first_layer; 1371 blit.src.box.width = readW; 1372 blit.src.box.height = readH; 1373 blit.src.box.depth = 1; 1374 blit.dst.resource = rbDraw->texture; 1375 blit.dst.level = rbDraw->surface->u.tex.level; 1376 blit.dst.format = rbDraw->texture->format; 1377 blit.dst.box.x = drawX; 1378 blit.dst.box.y = drawY; 1379 blit.dst.box.z = rbDraw->surface->u.tex.first_layer; 1380 blit.dst.box.width = drawW; 1381 blit.dst.box.height = drawH; 1382 blit.dst.box.depth = 1; 1383 blit.mask = PIPE_MASK_RGBA; 1384 blit.filter = PIPE_TEX_FILTER_NEAREST; 1385 1386 if (screen->is_format_supported(screen, blit.src.format, 1387 blit.src.resource->target, 1388 blit.src.resource->nr_samples, 1389 PIPE_BIND_SAMPLER_VIEW) && 1390 screen->is_format_supported(screen, blit.dst.format, 1391 blit.dst.resource->target, 1392 blit.dst.resource->nr_samples, 1393 PIPE_BIND_RENDER_TARGET)) { 1394 pipe->blit(pipe, &blit); 1395 return GL_TRUE; 1396 } 1397 } 1398 } 1399 1400 return GL_FALSE; 1401} 1402 1403 1404static void 1405st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1406 GLsizei width, GLsizei height, 1407 GLint dstx, GLint dsty, GLenum type) 1408{ 1409 struct st_context *st = st_context(ctx); 1410 struct pipe_context *pipe = st->pipe; 1411 struct pipe_screen *screen = pipe->screen; 1412 struct st_renderbuffer *rbRead; 1413 void *driver_vp, *driver_fp; 1414 struct pipe_resource *pt; 1415 struct pipe_sampler_view *sv[2] = { NULL }; 1416 struct st_fp_variant *fpv = NULL; 1417 int num_sampler_view = 1; 1418 GLfloat *color; 1419 enum pipe_format srcFormat; 1420 unsigned srcBind; 1421 GLboolean invertTex = GL_FALSE; 1422 GLint readX, readY, readW, readH; 1423 struct gl_pixelstore_attrib pack = ctx->DefaultPacking; 1424 1425 st_validate_state(st); 1426 1427 if (type == GL_DEPTH_STENCIL) { 1428 /* XXX make this more efficient */ 1429 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_STENCIL); 1430 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_DEPTH); 1431 return; 1432 } 1433 1434 if (type == GL_STENCIL) { 1435 /* can't use texturing to do stencil */ 1436 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); 1437 return; 1438 } 1439 1440 if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type)) 1441 return; 1442 1443 /* 1444 * The subsequent code implements glCopyPixels by copying the source 1445 * pixels into a temporary texture that's then applied to a textured quad. 1446 * When we draw the textured quad, all the usual per-fragment operations 1447 * are handled. 1448 */ 1449 1450 1451 /* 1452 * Get vertex/fragment shaders 1453 */ 1454 if (type == GL_COLOR) { 1455 fpv = get_color_fp_variant(st); 1456 1457 rbRead = st_get_color_read_renderbuffer(ctx); 1458 color = NULL; 1459 1460 driver_fp = fpv->driver_shader; 1461 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); 1462 1463 if (ctx->Pixel.MapColorFlag) { 1464 pipe_sampler_view_reference(&sv[1], 1465 st->pixel_xfer.pixelmap_sampler_view); 1466 num_sampler_view++; 1467 } 1468 1469 /* compiling a new fragment shader variant added new state constants 1470 * into the constant buffer, we need to update them 1471 */ 1472 st_upload_constants(st, st->fp->Base.Base.Parameters, 1473 PIPE_SHADER_FRAGMENT); 1474 } 1475 else { 1476 assert(type == GL_DEPTH); 1477 rbRead = st_renderbuffer(ctx->ReadBuffer-> 1478 Attachment[BUFFER_DEPTH].Renderbuffer); 1479 color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; 1480 1481 driver_fp = get_drawpix_z_stencil_program(st, GL_TRUE, GL_FALSE); 1482 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); 1483 } 1484 1485 /* Choose the format for the temporary texture. */ 1486 srcFormat = rbRead->texture->format; 1487 srcBind = PIPE_BIND_SAMPLER_VIEW | 1488 (type == GL_COLOR ? PIPE_BIND_RENDER_TARGET : PIPE_BIND_DEPTH_STENCIL); 1489 1490 if (!screen->is_format_supported(screen, srcFormat, st->internal_target, 0, 1491 srcBind)) { 1492 /* srcFormat is non-renderable. Find a compatible renderable format. */ 1493 if (type == GL_DEPTH) { 1494 srcFormat = st_choose_format(st, GL_DEPTH_COMPONENT, GL_NONE, 1495 GL_NONE, st->internal_target, 0, 1496 srcBind, FALSE); 1497 } 1498 else { 1499 assert(type == GL_COLOR); 1500 1501 if (util_format_is_float(srcFormat)) { 1502 srcFormat = st_choose_format(st, GL_RGBA32F, GL_NONE, 1503 GL_NONE, st->internal_target, 0, 1504 srcBind, FALSE); 1505 } 1506 else if (util_format_is_pure_sint(srcFormat)) { 1507 srcFormat = st_choose_format(st, GL_RGBA32I, GL_NONE, 1508 GL_NONE, st->internal_target, 0, 1509 srcBind, FALSE); 1510 } 1511 else if (util_format_is_pure_uint(srcFormat)) { 1512 srcFormat = st_choose_format(st, GL_RGBA32UI, GL_NONE, 1513 GL_NONE, st->internal_target, 0, 1514 srcBind, FALSE); 1515 } 1516 else if (util_format_is_snorm(srcFormat)) { 1517 srcFormat = st_choose_format(st, GL_RGBA16_SNORM, GL_NONE, 1518 GL_NONE, st->internal_target, 0, 1519 srcBind, FALSE); 1520 } 1521 else { 1522 srcFormat = st_choose_format(st, GL_RGBA, GL_NONE, 1523 GL_NONE, st->internal_target, 0, 1524 srcBind, FALSE); 1525 } 1526 } 1527 1528 if (srcFormat == PIPE_FORMAT_NONE) { 1529 assert(0 && "cannot choose a format for src of CopyPixels"); 1530 return; 1531 } 1532 } 1533 1534 /* Invert src region if needed */ 1535 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { 1536 srcy = ctx->ReadBuffer->Height - srcy - height; 1537 invertTex = !invertTex; 1538 } 1539 1540 /* Clip the read region against the src buffer bounds. 1541 * We'll still allocate a temporary buffer/texture for the original 1542 * src region size but we'll only read the region which is on-screen. 1543 * This may mean that we draw garbage pixels into the dest region, but 1544 * that's expected. 1545 */ 1546 readX = srcx; 1547 readY = srcy; 1548 readW = width; 1549 readH = height; 1550 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) { 1551 /* The source region is completely out of bounds. Do nothing. 1552 * The GL spec says "Results of copies from outside the window, 1553 * or from regions of the window that are not exposed, are 1554 * hardware dependent and undefined." 1555 */ 1556 return; 1557 } 1558 1559 readW = MAX2(0, readW); 1560 readH = MAX2(0, readH); 1561 1562 /* Allocate the temporary texture. */ 1563 pt = alloc_texture(st, width, height, srcFormat, srcBind); 1564 if (!pt) 1565 return; 1566 1567 sv[0] = st_create_texture_sampler_view(st->pipe, pt); 1568 if (!sv[0]) { 1569 pipe_resource_reference(&pt, NULL); 1570 return; 1571 } 1572 1573 /* Copy the src region to the temporary texture. */ 1574 { 1575 struct pipe_blit_info blit; 1576 1577 memset(&blit, 0, sizeof(blit)); 1578 blit.src.resource = rbRead->texture; 1579 blit.src.level = rbRead->surface->u.tex.level; 1580 blit.src.format = rbRead->texture->format; 1581 blit.src.box.x = readX; 1582 blit.src.box.y = readY; 1583 blit.src.box.z = rbRead->surface->u.tex.first_layer; 1584 blit.src.box.width = readW; 1585 blit.src.box.height = readH; 1586 blit.src.box.depth = 1; 1587 blit.dst.resource = pt; 1588 blit.dst.level = 0; 1589 blit.dst.format = pt->format; 1590 blit.dst.box.x = pack.SkipPixels; 1591 blit.dst.box.y = pack.SkipRows; 1592 blit.dst.box.z = 0; 1593 blit.dst.box.width = readW; 1594 blit.dst.box.height = readH; 1595 blit.dst.box.depth = 1; 1596 blit.mask = util_format_get_mask(pt->format) & ~PIPE_MASK_S; 1597 blit.filter = PIPE_TEX_FILTER_NEAREST; 1598 1599 pipe->blit(pipe, &blit); 1600 } 1601 1602 /* OK, the texture 'pt' contains the src image/pixels. Now draw a 1603 * textured quad with that texture. 1604 */ 1605 draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], 1606 width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, 1607 sv, 1608 num_sampler_view, 1609 driver_vp, 1610 driver_fp, fpv, 1611 color, invertTex, GL_FALSE, GL_FALSE); 1612 1613 pipe_resource_reference(&pt, NULL); 1614 pipe_sampler_view_reference(&sv[0], NULL); 1615} 1616 1617 1618 1619void st_init_drawpixels_functions(struct dd_function_table *functions) 1620{ 1621 functions->DrawPixels = st_DrawPixels; 1622 functions->CopyPixels = st_CopyPixels; 1623} 1624 1625 1626void 1627st_destroy_drawpix(struct st_context *st) 1628{ 1629 GLuint i; 1630 1631 for (i = 0; i < ARRAY_SIZE(st->drawpix.zs_shaders); i++) { 1632 if (st->drawpix.zs_shaders[i]) 1633 cso_delete_fragment_shader(st->cso_context, 1634 st->drawpix.zs_shaders[i]); 1635 } 1636 1637 if (st->drawpix.vert_shaders[0]) 1638 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[0]); 1639 if (st->drawpix.vert_shaders[1]) 1640 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[1]); 1641} 1642