st_cb_drawpixels.c revision 03b78ceb50b97611bcaa2d2354ff5b505306b0a1
1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 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 TUNGSTEN GRAPHICS 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/format_pack.h" 37#include "main/macros.h" 38#include "main/mfeatures.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#if FEATURE_drawpix 75 76/** 77 * Check if the given program is: 78 * 0: MOVE result.color, fragment.color; 79 * 1: END; 80 */ 81static GLboolean 82is_passthrough_program(const struct gl_fragment_program *prog) 83{ 84 if (prog->Base.NumInstructions == 2) { 85 const struct prog_instruction *inst = prog->Base.Instructions; 86 if (inst[0].Opcode == OPCODE_MOV && 87 inst[1].Opcode == OPCODE_END && 88 inst[0].DstReg.File == PROGRAM_OUTPUT && 89 inst[0].DstReg.Index == FRAG_RESULT_COLOR && 90 inst[0].DstReg.WriteMask == WRITEMASK_XYZW && 91 inst[0].SrcReg[0].File == PROGRAM_INPUT && 92 inst[0].SrcReg[0].Index == FRAG_ATTRIB_COL0 && 93 inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) { 94 return GL_TRUE; 95 } 96 } 97 return GL_FALSE; 98} 99 100 101/** 102 * Returns a fragment program which implements the current pixel transfer ops. 103 */ 104static struct gl_fragment_program * 105get_glsl_pixel_transfer_program(struct st_context *st, 106 struct st_fragment_program *orig) 107{ 108 int pixelMaps = 0, scaleAndBias = 0; 109 struct gl_context *ctx = st->ctx; 110 struct st_fragment_program *fp = (struct st_fragment_program *) 111 ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 112 113 if (!fp) 114 return NULL; 115 116 if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 || 117 ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 || 118 ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 || 119 ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) { 120 scaleAndBias = 1; 121 } 122 123 pixelMaps = ctx->Pixel.MapColorFlag; 124 125 if (pixelMaps) { 126 /* create the colormap/texture now if not already done */ 127 if (!st->pixel_xfer.pixelmap_texture) { 128 st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx); 129 st->pixel_xfer.pixelmap_sampler_view = 130 st_create_texture_sampler_view(st->pipe, 131 st->pixel_xfer.pixelmap_texture); 132 } 133 } 134 135 get_pixel_transfer_visitor(fp, orig->glsl_to_tgsi, 136 scaleAndBias, pixelMaps); 137 138 return &fp->Base; 139} 140 141 142/** 143 * Make fragment shader for glDraw/CopyPixels. This shader is made 144 * by combining the pixel transfer shader with the user-defined shader. 145 * \param fpIn the current/incoming fragment program 146 * \param fpOut returns the combined fragment program 147 */ 148void 149st_make_drawpix_fragment_program(struct st_context *st, 150 struct gl_fragment_program *fpIn, 151 struct gl_fragment_program **fpOut) 152{ 153 struct gl_program *newProg; 154 struct st_fragment_program *stfp = (struct st_fragment_program *) fpIn; 155 156 if (is_passthrough_program(fpIn)) { 157 newProg = (struct gl_program *) _mesa_clone_fragment_program(st->ctx, 158 &st->pixel_xfer.program->Base); 159 } 160 else if (stfp->glsl_to_tgsi != NULL) { 161 newProg = (struct gl_program *) get_glsl_pixel_transfer_program(st, stfp); 162 } 163 else { 164#if 0 165 /* debug */ 166 printf("Base program:\n"); 167 _mesa_print_program(&fpIn->Base); 168 printf("DrawPix program:\n"); 169 _mesa_print_program(&st->pixel_xfer.program->Base.Base); 170#endif 171 newProg = _mesa_combine_programs(st->ctx, 172 &st->pixel_xfer.program->Base.Base, 173 &fpIn->Base); 174 } 175 176#if 0 177 /* debug */ 178 printf("Combined DrawPixels program:\n"); 179 _mesa_print_program(newProg); 180 printf("InputsRead: 0x%x\n", newProg->InputsRead); 181 printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten); 182 _mesa_print_parameter_list(newProg->Parameters); 183#endif 184 185 *fpOut = (struct gl_fragment_program *) newProg; 186} 187 188 189/** 190 * Create fragment program that does a TEX() instruction to get a Z and/or 191 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL. 192 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX). 193 * Pass fragment color through as-is. 194 * \return pointer to the gl_fragment program 195 */ 196struct gl_fragment_program * 197st_make_drawpix_z_stencil_program(struct st_context *st, 198 GLboolean write_depth, 199 GLboolean write_stencil) 200{ 201 struct gl_context *ctx = st->ctx; 202 struct gl_program *p; 203 struct gl_fragment_program *fp; 204 GLuint ic = 0; 205 const GLuint shaderIndex = write_depth * 2 + write_stencil; 206 207 assert(shaderIndex < Elements(st->drawpix.shaders)); 208 209 if (st->drawpix.shaders[shaderIndex]) { 210 /* already have the proper shader */ 211 return st->drawpix.shaders[shaderIndex]; 212 } 213 214 /* 215 * Create shader now 216 */ 217 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 218 if (!p) 219 return NULL; 220 221 p->NumInstructions = write_depth ? 3 : 1; 222 p->NumInstructions += write_stencil ? 1 : 0; 223 224 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 225 if (!p->Instructions) { 226 ctx->Driver.DeleteProgram(ctx, p); 227 return NULL; 228 } 229 _mesa_init_instructions(p->Instructions, p->NumInstructions); 230 231 if (write_depth) { 232 /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */ 233 p->Instructions[ic].Opcode = OPCODE_TEX; 234 p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; 235 p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPTH; 236 p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z; 237 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 238 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 239 p->Instructions[ic].TexSrcUnit = 0; 240 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 241 ic++; 242 /* MOV result.color, fragment.color; */ 243 p->Instructions[ic].Opcode = OPCODE_MOV; 244 p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; 245 p->Instructions[ic].DstReg.Index = FRAG_RESULT_COLOR; 246 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 247 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_COL0; 248 ic++; 249 } 250 251 if (write_stencil) { 252 /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */ 253 p->Instructions[ic].Opcode = OPCODE_TEX; 254 p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; 255 p->Instructions[ic].DstReg.Index = FRAG_RESULT_STENCIL; 256 p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Y; 257 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 258 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 259 p->Instructions[ic].TexSrcUnit = 1; 260 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 261 ic++; 262 } 263 264 /* END; */ 265 p->Instructions[ic++].Opcode = OPCODE_END; 266 267 assert(ic == p->NumInstructions); 268 269 p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0; 270 p->OutputsWritten = 0; 271 if (write_depth) { 272 p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_DEPTH); 273 p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_COLOR); 274 } 275 if (write_stencil) 276 p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_STENCIL); 277 278 p->SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */ 279 if (write_stencil) 280 p->SamplersUsed |= 1 << 1; 281 282 fp = (struct gl_fragment_program *) p; 283 284 /* save the new shader */ 285 st->drawpix.shaders[shaderIndex] = fp; 286 287 return fp; 288} 289 290 291/** 292 * Create a simple vertex shader that just passes through the 293 * vertex position and texcoord (and optionally, color). 294 */ 295static void * 296make_passthrough_vertex_shader(struct st_context *st, 297 GLboolean passColor) 298{ 299 if (!st->drawpix.vert_shaders[passColor]) { 300 struct ureg_program *ureg = ureg_create( TGSI_PROCESSOR_VERTEX ); 301 302 if (ureg == NULL) 303 return NULL; 304 305 /* MOV result.pos, vertex.pos; */ 306 ureg_MOV(ureg, 307 ureg_DECL_output( ureg, TGSI_SEMANTIC_POSITION, 0 ), 308 ureg_DECL_vs_input( ureg, 0 )); 309 310 /* MOV result.texcoord0, vertex.attr[1]; */ 311 ureg_MOV(ureg, 312 ureg_DECL_output( ureg, TGSI_SEMANTIC_GENERIC, 0 ), 313 ureg_DECL_vs_input( ureg, 1 )); 314 315 if (passColor) { 316 /* MOV result.color0, vertex.attr[2]; */ 317 ureg_MOV(ureg, 318 ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 ), 319 ureg_DECL_vs_input( ureg, 2 )); 320 } 321 322 ureg_END( ureg ); 323 324 st->drawpix.vert_shaders[passColor] = 325 ureg_create_shader_and_destroy( ureg, st->pipe ); 326 } 327 328 return st->drawpix.vert_shaders[passColor]; 329} 330 331 332/** 333 * Return a texture internalFormat for drawing/copying an image 334 * of the given format and type. 335 */ 336static GLenum 337internal_format(struct gl_context *ctx, GLenum format, GLenum type) 338{ 339 switch (format) { 340 case GL_DEPTH_COMPONENT: 341 switch (type) { 342 case GL_UNSIGNED_SHORT: 343 return GL_DEPTH_COMPONENT16; 344 345 case GL_UNSIGNED_INT: 346 return GL_DEPTH_COMPONENT32; 347 348 case GL_FLOAT: 349 if (ctx->Extensions.ARB_depth_buffer_float) 350 return GL_DEPTH_COMPONENT32F; 351 else 352 return GL_DEPTH_COMPONENT; 353 354 default: 355 return GL_DEPTH_COMPONENT; 356 } 357 358 case GL_DEPTH_STENCIL: 359 switch (type) { 360 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: 361 return GL_DEPTH32F_STENCIL8; 362 363 case GL_UNSIGNED_INT_24_8: 364 default: 365 return GL_DEPTH24_STENCIL8; 366 } 367 368 case GL_STENCIL_INDEX: 369 return GL_STENCIL_INDEX; 370 371 default: 372 if (_mesa_is_enum_format_integer(format)) { 373 switch (type) { 374 case GL_BYTE: 375 return GL_RGBA8I; 376 case GL_UNSIGNED_BYTE: 377 return GL_RGBA8UI; 378 case GL_SHORT: 379 return GL_RGBA16I; 380 case GL_UNSIGNED_SHORT: 381 return GL_RGBA16UI; 382 case GL_INT: 383 return GL_RGBA32I; 384 case GL_UNSIGNED_INT: 385 return GL_RGBA32UI; 386 default: 387 assert(0 && "Unexpected type in internal_format()"); 388 return GL_RGBA_INTEGER; 389 } 390 } 391 else { 392 switch (type) { 393 case GL_UNSIGNED_BYTE: 394 case GL_UNSIGNED_INT_8_8_8_8: 395 case GL_UNSIGNED_INT_8_8_8_8_REV: 396 default: 397 return GL_RGBA8; 398 399 case GL_UNSIGNED_BYTE_3_3_2: 400 case GL_UNSIGNED_BYTE_2_3_3_REV: 401 case GL_UNSIGNED_SHORT_4_4_4_4: 402 case GL_UNSIGNED_SHORT_4_4_4_4_REV: 403 return GL_RGBA4; 404 405 case GL_UNSIGNED_SHORT_5_6_5: 406 case GL_UNSIGNED_SHORT_5_6_5_REV: 407 return GL_RGB565; 408 409 case GL_UNSIGNED_SHORT_5_5_5_1: 410 case GL_UNSIGNED_SHORT_1_5_5_5_REV: 411 return GL_RGB5_A1; 412 413 case GL_UNSIGNED_INT_10_10_10_2: 414 case GL_UNSIGNED_INT_2_10_10_10_REV: 415 return GL_RGB10_A2; 416 417 case GL_UNSIGNED_SHORT: 418 case GL_UNSIGNED_INT: 419 return GL_RGBA16; 420 421 case GL_BYTE: 422 return 423 ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8; 424 425 case GL_SHORT: 426 case GL_INT: 427 return 428 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 429 430 case GL_HALF_FLOAT_ARB: 431 return 432 ctx->Extensions.ARB_texture_float ? GL_RGBA16F : 433 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 434 435 case GL_FLOAT: 436 case GL_DOUBLE: 437 return 438 ctx->Extensions.ARB_texture_float ? GL_RGBA32F : 439 ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; 440 441 case GL_UNSIGNED_INT_5_9_9_9_REV: 442 assert(ctx->Extensions.EXT_texture_shared_exponent); 443 return GL_RGB9_E5; 444 445 case GL_UNSIGNED_INT_10F_11F_11F_REV: 446 assert(ctx->Extensions.EXT_packed_float); 447 return GL_R11F_G11F_B10F; 448 } 449 } 450 } 451} 452 453 454/** 455 * Create a temporary texture to hold an image of the given size. 456 * If width, height are not POT and the driver only handles POT textures, 457 * allocate the next larger size of texture that is POT. 458 */ 459static struct pipe_resource * 460alloc_texture(struct st_context *st, GLsizei width, GLsizei height, 461 enum pipe_format texFormat) 462{ 463 struct pipe_resource *pt; 464 465 pt = st_texture_create(st, st->internal_target, texFormat, 0, 466 width, height, 1, 1, PIPE_BIND_SAMPLER_VIEW); 467 468 return pt; 469} 470 471 472/** 473 * Make texture containing an image for glDrawPixels image. 474 * If 'pixels' is NULL, leave the texture image data undefined. 475 */ 476static struct pipe_resource * 477make_texture(struct st_context *st, 478 GLsizei width, GLsizei height, GLenum format, GLenum type, 479 const struct gl_pixelstore_attrib *unpack, 480 const GLvoid *pixels) 481{ 482 struct gl_context *ctx = st->ctx; 483 struct pipe_context *pipe = st->pipe; 484 gl_format mformat; 485 struct pipe_resource *pt; 486 enum pipe_format pipeFormat; 487 GLenum baseInternalFormat, intFormat; 488 489 intFormat = internal_format(ctx, format, type); 490 baseInternalFormat = _mesa_base_tex_format(ctx, intFormat); 491 492 mformat = st_ChooseTextureFormat_renderable(ctx, intFormat, 493 format, type, GL_FALSE); 494 assert(mformat); 495 496 pipeFormat = st_mesa_format_to_pipe_format(mformat); 497 assert(pipeFormat); 498 499 pixels = _mesa_map_pbo_source(ctx, unpack, pixels); 500 if (!pixels) 501 return NULL; 502 503 /* alloc temporary texture */ 504 pt = alloc_texture(st, width, height, pipeFormat); 505 if (!pt) { 506 _mesa_unmap_pbo_source(ctx, unpack); 507 return NULL; 508 } 509 510 { 511 struct pipe_transfer *transfer; 512 GLboolean success; 513 GLubyte *dest; 514 const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; 515 516 /* we'll do pixel transfer in a fragment shader */ 517 ctx->_ImageTransferState = 0x0; 518 519 transfer = pipe_get_transfer(st->pipe, pt, 0, 0, 520 PIPE_TRANSFER_WRITE, 0, 0, 521 width, height); 522 523 /* map texture transfer */ 524 dest = pipe_transfer_map(pipe, transfer); 525 526 527 /* Put image into texture transfer. 528 * Note that the image is actually going to be upside down in 529 * the texture. We deal with that with texcoords. 530 */ 531 success = _mesa_texstore(ctx, 2, /* dims */ 532 baseInternalFormat, /* baseInternalFormat */ 533 mformat, /* gl_format */ 534 transfer->stride, /* dstRowStride, bytes */ 535 &dest, /* destSlices */ 536 width, height, 1, /* size */ 537 format, type, /* src format/type */ 538 pixels, /* data source */ 539 unpack); 540 541 /* unmap */ 542 pipe_transfer_unmap(pipe, transfer); 543 pipe->transfer_destroy(pipe, transfer); 544 545 assert(success); 546 547 /* restore */ 548 ctx->_ImageTransferState = imageTransferStateSave; 549 } 550 551 _mesa_unmap_pbo_source(ctx, unpack); 552 553 return pt; 554} 555 556 557/** 558 * Draw quad with texcoords and optional color. 559 * Coords are gallium window coords with y=0=top. 560 * \param color may be null 561 * \param invertTex if true, flip texcoords vertically 562 */ 563static void 564draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z, 565 GLfloat x1, GLfloat y1, const GLfloat *color, 566 GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord) 567{ 568 struct st_context *st = st_context(ctx); 569 struct pipe_context *pipe = st->pipe; 570 GLfloat (*verts)[3][4]; /* four verts, three attribs, XYZW */ 571 struct pipe_resource *buf = NULL; 572 unsigned offset; 573 574 u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), &offset, &buf, 575 (void**)&verts); 576 if (!buf) { 577 return; 578 } 579 580 /* setup vertex data */ 581 { 582 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 583 const GLfloat fb_width = (GLfloat) fb->Width; 584 const GLfloat fb_height = (GLfloat) fb->Height; 585 const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f; 586 const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f; 587 const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f; 588 const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f; 589 const GLfloat sLeft = 0.0f, sRight = maxXcoord; 590 const GLfloat tTop = invertTex ? maxYcoord : 0.0f; 591 const GLfloat tBot = invertTex ? 0.0f : maxYcoord; 592 GLuint i; 593 594 /* upper-left */ 595 verts[0][0][0] = clip_x0; /* v[0].attr[0].x */ 596 verts[0][0][1] = clip_y0; /* v[0].attr[0].y */ 597 598 /* upper-right */ 599 verts[1][0][0] = clip_x1; 600 verts[1][0][1] = clip_y0; 601 602 /* lower-right */ 603 verts[2][0][0] = clip_x1; 604 verts[2][0][1] = clip_y1; 605 606 /* lower-left */ 607 verts[3][0][0] = clip_x0; 608 verts[3][0][1] = clip_y1; 609 610 verts[0][1][0] = sLeft; /* v[0].attr[1].S */ 611 verts[0][1][1] = tTop; /* v[0].attr[1].T */ 612 verts[1][1][0] = sRight; 613 verts[1][1][1] = tTop; 614 verts[2][1][0] = sRight; 615 verts[2][1][1] = tBot; 616 verts[3][1][0] = sLeft; 617 verts[3][1][1] = tBot; 618 619 /* same for all verts: */ 620 if (color) { 621 for (i = 0; i < 4; i++) { 622 verts[i][0][2] = z; /* v[i].attr[0].z */ 623 verts[i][0][3] = 1.0f; /* v[i].attr[0].w */ 624 verts[i][2][0] = color[0]; /* v[i].attr[2].r */ 625 verts[i][2][1] = color[1]; /* v[i].attr[2].g */ 626 verts[i][2][2] = color[2]; /* v[i].attr[2].b */ 627 verts[i][2][3] = color[3]; /* v[i].attr[2].a */ 628 verts[i][1][2] = 0.0f; /* v[i].attr[1].R */ 629 verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */ 630 } 631 } 632 else { 633 for (i = 0; i < 4; i++) { 634 verts[i][0][2] = z; /*Z*/ 635 verts[i][0][3] = 1.0f; /*W*/ 636 verts[i][1][2] = 0.0f; /*R*/ 637 verts[i][1][3] = 1.0f; /*Q*/ 638 } 639 } 640 } 641 642 u_upload_unmap(st->uploader); 643 util_draw_vertex_buffer(pipe, st->cso_context, buf, offset, 644 PIPE_PRIM_QUADS, 645 4, /* verts */ 646 3); /* attribs/vert */ 647 pipe_resource_reference(&buf, NULL); 648} 649 650 651 652static void 653draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 654 GLsizei width, GLsizei height, 655 GLfloat zoomX, GLfloat zoomY, 656 struct pipe_sampler_view **sv, 657 int num_sampler_view, 658 void *driver_vp, 659 void *driver_fp, 660 const GLfloat *color, 661 GLboolean invertTex, 662 GLboolean write_depth, GLboolean write_stencil) 663{ 664 struct st_context *st = st_context(ctx); 665 struct pipe_context *pipe = st->pipe; 666 struct cso_context *cso = st->cso_context; 667 GLfloat x0, y0, x1, y1; 668 GLsizei maxSize; 669 boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT; 670 671 /* limit checks */ 672 /* XXX if DrawPixels image is larger than max texture size, break 673 * it up into chunks. 674 */ 675 maxSize = 1 << (pipe->screen->get_param(pipe->screen, 676 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 677 assert(width <= maxSize); 678 assert(height <= maxSize); 679 680 cso_save_rasterizer(cso); 681 cso_save_viewport(cso); 682 cso_save_samplers(cso, PIPE_SHADER_FRAGMENT); 683 cso_save_sampler_views(cso, PIPE_SHADER_FRAGMENT); 684 cso_save_fragment_shader(cso); 685 cso_save_stream_outputs(cso); 686 cso_save_vertex_shader(cso); 687 cso_save_geometry_shader(cso); 688 cso_save_vertex_elements(cso); 689 cso_save_vertex_buffers(cso); 690 if (write_stencil) { 691 cso_save_depth_stencil_alpha(cso); 692 cso_save_blend(cso); 693 } 694 695 /* rasterizer state: just scissor */ 696 { 697 struct pipe_rasterizer_state rasterizer; 698 memset(&rasterizer, 0, sizeof(rasterizer)); 699 rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader && 700 ctx->Color._ClampFragmentColor && 701 !ctx->DrawBuffer->_IntegerColor; 702 rasterizer.gl_rasterization_rules = 1; 703 rasterizer.depth_clip = !ctx->Transform.DepthClamp; 704 rasterizer.scissor = ctx->Scissor.Enabled; 705 cso_set_rasterizer(cso, &rasterizer); 706 } 707 708 if (write_stencil) { 709 /* Stencil writing bypasses the normal fragment pipeline to 710 * disable color writing and set stencil test to always pass. 711 */ 712 struct pipe_depth_stencil_alpha_state dsa; 713 struct pipe_blend_state blend; 714 715 /* depth/stencil */ 716 memset(&dsa, 0, sizeof(dsa)); 717 dsa.stencil[0].enabled = 1; 718 dsa.stencil[0].func = PIPE_FUNC_ALWAYS; 719 dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; 720 dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE; 721 if (write_depth) { 722 /* writing depth+stencil: depth test always passes */ 723 dsa.depth.enabled = 1; 724 dsa.depth.writemask = ctx->Depth.Mask; 725 dsa.depth.func = PIPE_FUNC_ALWAYS; 726 } 727 cso_set_depth_stencil_alpha(cso, &dsa); 728 729 /* blend (colormask) */ 730 memset(&blend, 0, sizeof(blend)); 731 cso_set_blend(cso, &blend); 732 } 733 734 /* fragment shader state: TEX lookup program */ 735 cso_set_fragment_shader_handle(cso, driver_fp); 736 737 /* vertex shader state: position + texcoord pass-through */ 738 cso_set_vertex_shader_handle(cso, driver_vp); 739 740 /* geometry shader state: disabled */ 741 cso_set_geometry_shader_handle(cso, NULL); 742 743 /* texture sampling state: */ 744 { 745 struct pipe_sampler_state sampler; 746 memset(&sampler, 0, sizeof(sampler)); 747 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP; 748 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP; 749 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP; 750 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 751 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 752 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 753 sampler.normalized_coords = normalized; 754 755 cso_single_sampler(cso, PIPE_SHADER_FRAGMENT, 0, &sampler); 756 if (num_sampler_view > 1) { 757 cso_single_sampler(cso, PIPE_SHADER_FRAGMENT, 1, &sampler); 758 } 759 cso_single_sampler_done(cso, PIPE_SHADER_FRAGMENT); 760 } 761 762 /* viewport state: viewport matching window dims */ 763 { 764 const float w = (float) ctx->DrawBuffer->Width; 765 const float h = (float) ctx->DrawBuffer->Height; 766 struct pipe_viewport_state vp; 767 vp.scale[0] = 0.5f * w; 768 vp.scale[1] = -0.5f * h; 769 vp.scale[2] = 0.5f; 770 vp.scale[3] = 1.0f; 771 vp.translate[0] = 0.5f * w; 772 vp.translate[1] = 0.5f * h; 773 vp.translate[2] = 0.5f; 774 vp.translate[3] = 0.0f; 775 cso_set_viewport(cso, &vp); 776 } 777 778 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 779 cso_set_stream_outputs(st->cso_context, 0, NULL, 0); 780 781 /* texture state: */ 782 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv); 783 784 /* Compute Gallium window coords (y=0=top) with pixel zoom. 785 * Recall that these coords are transformed by the current 786 * vertex shader and viewport transformation. 787 */ 788 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) { 789 y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY); 790 invertTex = !invertTex; 791 } 792 793 x0 = (GLfloat) x; 794 x1 = x + width * ctx->Pixel.ZoomX; 795 y0 = (GLfloat) y; 796 y1 = y + height * ctx->Pixel.ZoomY; 797 798 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 799 z = z * 2.0 - 1.0; 800 801 draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex, 802 normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width, 803 normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height); 804 805 /* restore state */ 806 cso_restore_rasterizer(cso); 807 cso_restore_viewport(cso); 808 cso_restore_samplers(cso, PIPE_SHADER_FRAGMENT); 809 cso_restore_sampler_views(cso, PIPE_SHADER_FRAGMENT); 810 cso_restore_fragment_shader(cso); 811 cso_restore_vertex_shader(cso); 812 cso_restore_geometry_shader(cso); 813 cso_restore_vertex_elements(cso); 814 cso_restore_vertex_buffers(cso); 815 cso_restore_stream_outputs(cso); 816 if (write_stencil) { 817 cso_restore_depth_stencil_alpha(cso); 818 cso_restore_blend(cso); 819 } 820} 821 822 823/** 824 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we 825 * can't use a fragment shader to write stencil values. 826 */ 827static void 828draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, 829 GLsizei width, GLsizei height, GLenum format, GLenum type, 830 const struct gl_pixelstore_attrib *unpack, 831 const GLvoid *pixels) 832{ 833 struct st_context *st = st_context(ctx); 834 struct pipe_context *pipe = st->pipe; 835 struct st_renderbuffer *strb; 836 enum pipe_transfer_usage usage; 837 struct pipe_transfer *pt; 838 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; 839 ubyte *stmap; 840 struct gl_pixelstore_attrib clippedUnpack = *unpack; 841 GLubyte *sValues; 842 GLuint *zValues; 843 844 if (!zoom) { 845 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, 846 &clippedUnpack)) { 847 /* totally clipped */ 848 return; 849 } 850 } 851 852 strb = st_renderbuffer(ctx->DrawBuffer-> 853 Attachment[BUFFER_STENCIL].Renderbuffer); 854 855 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 856 y = ctx->DrawBuffer->Height - y - height; 857 } 858 859 if (format == GL_STENCIL_INDEX && 860 _mesa_is_format_packed_depth_stencil(strb->Base.Format)) { 861 /* writing stencil to a combined depth+stencil buffer */ 862 usage = PIPE_TRANSFER_READ_WRITE; 863 } 864 else { 865 usage = PIPE_TRANSFER_WRITE; 866 } 867 868 pt = pipe_get_transfer(pipe, strb->texture, 869 strb->rtt_level, strb->rtt_face + strb->rtt_slice, 870 usage, x, y, 871 width, height); 872 873 stmap = pipe_transfer_map(pipe, pt); 874 875 pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels); 876 assert(pixels); 877 878 sValues = (GLubyte *) malloc(width * sizeof(GLubyte)); 879 zValues = (GLuint *) malloc(width * sizeof(GLuint)); 880 881 if (sValues && zValues) { 882 GLint row; 883 for (row = 0; row < height; row++) { 884 GLfloat *zValuesFloat = (GLfloat*)zValues; 885 GLenum destType = GL_UNSIGNED_BYTE; 886 const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels, 887 width, height, 888 format, type, 889 row, 0); 890 _mesa_unpack_stencil_span(ctx, width, destType, sValues, 891 type, source, &clippedUnpack, 892 ctx->_ImageTransferState); 893 894 if (format == GL_DEPTH_STENCIL) { 895 GLenum ztype = 896 pt->resource->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT ? 897 GL_FLOAT : GL_UNSIGNED_INT; 898 899 _mesa_unpack_depth_span(ctx, width, ztype, zValues, 900 (1 << 24) - 1, type, source, 901 &clippedUnpack); 902 } 903 904 if (zoom) { 905 _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with " 906 "zoom not complete"); 907 } 908 909 { 910 GLint spanY; 911 912 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 913 spanY = height - row - 1; 914 } 915 else { 916 spanY = row; 917 } 918 919 /* now pack the stencil (and Z) values in the dest format */ 920 switch (pt->resource->format) { 921 case PIPE_FORMAT_S8_UINT: 922 { 923 ubyte *dest = stmap + spanY * pt->stride; 924 assert(usage == PIPE_TRANSFER_WRITE); 925 memcpy(dest, sValues, width); 926 } 927 break; 928 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 929 if (format == GL_DEPTH_STENCIL) { 930 uint *dest = (uint *) (stmap + spanY * pt->stride); 931 GLint k; 932 assert(usage == PIPE_TRANSFER_WRITE); 933 for (k = 0; k < width; k++) { 934 dest[k] = zValues[k] | (sValues[k] << 24); 935 } 936 } 937 else { 938 uint *dest = (uint *) (stmap + spanY * pt->stride); 939 GLint k; 940 assert(usage == PIPE_TRANSFER_READ_WRITE); 941 for (k = 0; k < width; k++) { 942 dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24); 943 } 944 } 945 break; 946 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 947 if (format == GL_DEPTH_STENCIL) { 948 uint *dest = (uint *) (stmap + spanY * pt->stride); 949 GLint k; 950 assert(usage == PIPE_TRANSFER_WRITE); 951 for (k = 0; k < width; k++) { 952 dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff); 953 } 954 } 955 else { 956 uint *dest = (uint *) (stmap + spanY * pt->stride); 957 GLint k; 958 assert(usage == PIPE_TRANSFER_READ_WRITE); 959 for (k = 0; k < width; k++) { 960 dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff); 961 } 962 } 963 break; 964 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 965 if (format == GL_DEPTH_STENCIL) { 966 uint *dest = (uint *) (stmap + spanY * pt->stride); 967 GLfloat *destf = (GLfloat*)dest; 968 GLint k; 969 assert(usage == PIPE_TRANSFER_WRITE); 970 for (k = 0; k < width; k++) { 971 destf[k*2] = zValuesFloat[k]; 972 dest[k*2+1] = sValues[k] & 0xff; 973 } 974 } 975 else { 976 uint *dest = (uint *) (stmap + spanY * pt->stride); 977 GLint k; 978 assert(usage == PIPE_TRANSFER_READ_WRITE); 979 for (k = 0; k < width; k++) { 980 dest[k*2+1] = sValues[k] & 0xff; 981 } 982 } 983 break; 984 default: 985 assert(0); 986 } 987 } 988 } 989 } 990 else { 991 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels()"); 992 } 993 994 free(sValues); 995 free(zValues); 996 997 _mesa_unmap_pbo_source(ctx, &clippedUnpack); 998 999 /* unmap the stencil buffer */ 1000 pipe_transfer_unmap(pipe, pt); 1001 pipe->transfer_destroy(pipe, pt); 1002} 1003 1004 1005/** 1006 * Get fragment program variant for a glDrawPixels or glCopyPixels 1007 * command for RGBA data. 1008 */ 1009static struct st_fp_variant * 1010get_color_fp_variant(struct st_context *st) 1011{ 1012 struct gl_context *ctx = st->ctx; 1013 struct st_fp_variant_key key; 1014 struct st_fp_variant *fpv; 1015 1016 memset(&key, 0, sizeof(key)); 1017 1018 key.st = st; 1019 key.drawpixels = 1; 1020 key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 || 1021 ctx->Pixel.RedScale != 1.0 || 1022 ctx->Pixel.GreenBias != 0.0 || 1023 ctx->Pixel.GreenScale != 1.0 || 1024 ctx->Pixel.BlueBias != 0.0 || 1025 ctx->Pixel.BlueScale != 1.0 || 1026 ctx->Pixel.AlphaBias != 0.0 || 1027 ctx->Pixel.AlphaScale != 1.0); 1028 key.pixelMaps = ctx->Pixel.MapColorFlag; 1029 key.clamp_color = st->clamp_frag_color_in_shader && 1030 st->ctx->Color._ClampFragmentColor && 1031 !st->ctx->DrawBuffer->_IntegerColor; 1032 1033 fpv = st_get_fp_variant(st, st->fp, &key); 1034 1035 return fpv; 1036} 1037 1038 1039/** 1040 * Get fragment program variant for a glDrawPixels or glCopyPixels 1041 * command for depth/stencil data. 1042 */ 1043static struct st_fp_variant * 1044get_depth_stencil_fp_variant(struct st_context *st, GLboolean write_depth, 1045 GLboolean write_stencil) 1046{ 1047 struct st_fp_variant_key key; 1048 struct st_fp_variant *fpv; 1049 1050 memset(&key, 0, sizeof(key)); 1051 1052 key.st = st; 1053 key.drawpixels = 1; 1054 key.drawpixels_z = write_depth; 1055 key.drawpixels_stencil = write_stencil; 1056 1057 fpv = st_get_fp_variant(st, st->fp, &key); 1058 1059 return fpv; 1060} 1061 1062 1063/** 1064 * Clamp glDrawPixels width and height to the maximum texture size. 1065 */ 1066static void 1067clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height, 1068 struct gl_pixelstore_attrib *unpack) 1069{ 1070 const unsigned maxSize = 1071 1 << (pipe->screen->get_param(pipe->screen, 1072 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 1073 1074 if (*width > maxSize) { 1075 if (unpack->RowLength == 0) 1076 unpack->RowLength = *width; 1077 *width = maxSize; 1078 } 1079 if (*height > maxSize) { 1080 *height = maxSize; 1081 } 1082} 1083 1084 1085/** 1086 * Called via ctx->Driver.DrawPixels() 1087 */ 1088static void 1089st_DrawPixels(struct gl_context *ctx, GLint x, GLint y, 1090 GLsizei width, GLsizei height, 1091 GLenum format, GLenum type, 1092 const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) 1093{ 1094 void *driver_vp, *driver_fp; 1095 struct st_context *st = st_context(ctx); 1096 const GLfloat *color; 1097 struct pipe_context *pipe = st->pipe; 1098 GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE; 1099 struct pipe_sampler_view *sv[2]; 1100 int num_sampler_view = 1; 1101 struct st_fp_variant *fpv; 1102 struct gl_pixelstore_attrib clippedUnpack; 1103 1104 /* Mesa state should be up to date by now */ 1105 assert(ctx->NewState == 0x0); 1106 1107 st_validate_state(st); 1108 1109 /* Limit the size of the glDrawPixels to the max texture size. 1110 * Strictly speaking, that's not correct but since we don't handle 1111 * larger images yet, this is better than crashing. 1112 */ 1113 clippedUnpack = *unpack; 1114 unpack = &clippedUnpack; 1115 clamp_size(st->pipe, &width, &height, &clippedUnpack); 1116 1117 if (format == GL_DEPTH_STENCIL) 1118 write_stencil = write_depth = GL_TRUE; 1119 else if (format == GL_STENCIL_INDEX) 1120 write_stencil = GL_TRUE; 1121 else if (format == GL_DEPTH_COMPONENT) 1122 write_depth = GL_TRUE; 1123 1124 if (write_stencil && 1125 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) { 1126 /* software fallback */ 1127 draw_stencil_pixels(ctx, x, y, width, height, format, type, 1128 unpack, pixels); 1129 return; 1130 } 1131 1132 /* 1133 * Get vertex/fragment shaders 1134 */ 1135 if (write_depth || write_stencil) { 1136 fpv = get_depth_stencil_fp_variant(st, write_depth, write_stencil); 1137 1138 driver_fp = fpv->driver_shader; 1139 1140 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); 1141 1142 color = ctx->Current.RasterColor; 1143 } 1144 else { 1145 fpv = get_color_fp_variant(st); 1146 1147 driver_fp = fpv->driver_shader; 1148 1149 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); 1150 1151 color = NULL; 1152 if (st->pixel_xfer.pixelmap_enabled) { 1153 sv[1] = st->pixel_xfer.pixelmap_sampler_view; 1154 num_sampler_view++; 1155 } 1156 } 1157 1158 /* update fragment program constants */ 1159 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); 1160 1161 /* draw with textured quad */ 1162 { 1163 struct pipe_resource *pt 1164 = make_texture(st, width, height, format, type, unpack, pixels); 1165 if (pt) { 1166 sv[0] = st_create_texture_sampler_view(st->pipe, pt); 1167 1168 if (sv[0]) { 1169 /* Create a second sampler view to read stencil. 1170 * The stencil is written using the shader stencil export 1171 * functionality. */ 1172 if (write_stencil) { 1173 enum pipe_format stencil_format = 1174 util_format_stencil_only(pt->format); 1175 1176 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt, 1177 stencil_format); 1178 num_sampler_view++; 1179 } 1180 1181 draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], 1182 width, height, 1183 ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, 1184 sv, 1185 num_sampler_view, 1186 driver_vp, 1187 driver_fp, 1188 color, GL_FALSE, write_depth, write_stencil); 1189 pipe_sampler_view_reference(&sv[0], NULL); 1190 if (num_sampler_view > 1) 1191 pipe_sampler_view_reference(&sv[1], NULL); 1192 } 1193 pipe_resource_reference(&pt, NULL); 1194 } 1195 } 1196} 1197 1198 1199 1200/** 1201 * Software fallback for glCopyPixels(GL_STENCIL). 1202 */ 1203static void 1204copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1205 GLsizei width, GLsizei height, 1206 GLint dstx, GLint dsty) 1207{ 1208 struct st_renderbuffer *rbDraw; 1209 struct pipe_context *pipe = st_context(ctx)->pipe; 1210 enum pipe_transfer_usage usage; 1211 struct pipe_transfer *ptDraw; 1212 ubyte *drawMap; 1213 ubyte *buffer; 1214 int i; 1215 1216 buffer = malloc(width * height * sizeof(ubyte)); 1217 if (!buffer) { 1218 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)"); 1219 return; 1220 } 1221 1222 /* Get the dest renderbuffer */ 1223 rbDraw = st_renderbuffer(ctx->DrawBuffer-> 1224 Attachment[BUFFER_STENCIL].Renderbuffer); 1225 1226 /* this will do stencil pixel transfer ops */ 1227 _mesa_readpixels(ctx, srcx, srcy, width, height, 1228 GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, 1229 &ctx->DefaultPacking, buffer); 1230 1231 if (0) { 1232 /* debug code: dump stencil values */ 1233 GLint row, col; 1234 for (row = 0; row < height; row++) { 1235 printf("%3d: ", row); 1236 for (col = 0; col < width; col++) { 1237 printf("%02x ", buffer[col + row * width]); 1238 } 1239 printf("\n"); 1240 } 1241 } 1242 1243 if (_mesa_is_format_packed_depth_stencil(rbDraw->Base.Format)) 1244 usage = PIPE_TRANSFER_READ_WRITE; 1245 else 1246 usage = PIPE_TRANSFER_WRITE; 1247 1248 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 1249 dsty = rbDraw->Base.Height - dsty - height; 1250 } 1251 1252 ptDraw = pipe_get_transfer(pipe, 1253 rbDraw->texture, 1254 rbDraw->rtt_level, 1255 rbDraw->rtt_face + rbDraw->rtt_slice, 1256 usage, dstx, dsty, 1257 width, height); 1258 1259 assert(util_format_get_blockwidth(ptDraw->resource->format) == 1); 1260 assert(util_format_get_blockheight(ptDraw->resource->format) == 1); 1261 1262 /* map the stencil buffer */ 1263 drawMap = pipe_transfer_map(pipe, ptDraw); 1264 1265 /* draw */ 1266 /* XXX PixelZoom not handled yet */ 1267 for (i = 0; i < height; i++) { 1268 ubyte *dst; 1269 const ubyte *src; 1270 int y; 1271 1272 y = i; 1273 1274 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 1275 y = height - y - 1; 1276 } 1277 1278 dst = drawMap + y * ptDraw->stride; 1279 src = buffer + i * width; 1280 1281 _mesa_pack_ubyte_stencil_row(rbDraw->Base.Format, width, src, dst); 1282 } 1283 1284 free(buffer); 1285 1286 /* unmap the stencil buffer */ 1287 pipe_transfer_unmap(pipe, ptDraw); 1288 pipe->transfer_destroy(pipe, ptDraw); 1289} 1290 1291 1292/** 1293 * Return renderbuffer to use for reading color pixels for glCopyPixels 1294 */ 1295static struct st_renderbuffer * 1296st_get_color_read_renderbuffer(struct gl_context *ctx) 1297{ 1298 struct gl_framebuffer *fb = ctx->ReadBuffer; 1299 struct st_renderbuffer *strb = 1300 st_renderbuffer(fb->_ColorReadBuffer); 1301 1302 return strb; 1303} 1304 1305 1306/** Do the src/dest regions overlap? */ 1307static GLboolean 1308regions_overlap(GLint srcX, GLint srcY, GLint dstX, GLint dstY, 1309 GLsizei width, GLsizei height) 1310{ 1311 if (srcX + width <= dstX || 1312 dstX + width <= srcX || 1313 srcY + height <= dstY || 1314 dstY + height <= srcY) 1315 return GL_FALSE; 1316 else 1317 return GL_TRUE; 1318} 1319 1320 1321/** 1322 * Try to do a glCopyPixels for simple cases with a blit by calling 1323 * pipe->resource_copy_region(). 1324 * 1325 * We can do this when we're copying color pixels (depth/stencil 1326 * eventually) with no pixel zoom, no pixel transfer ops, no 1327 * per-fragment ops, the src/dest regions don't overlap and the 1328 * src/dest pixel formats are the same. 1329 */ 1330static GLboolean 1331blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1332 GLsizei width, GLsizei height, 1333 GLint dstx, GLint dsty, GLenum type) 1334{ 1335 struct st_context *st = st_context(ctx); 1336 struct pipe_context *pipe = st->pipe; 1337 struct gl_pixelstore_attrib pack, unpack; 1338 GLint readX, readY, readW, readH; 1339 1340 if (type == GL_COLOR && 1341 ctx->Pixel.ZoomX == 1.0 && 1342 ctx->Pixel.ZoomY == 1.0 && 1343 ctx->_ImageTransferState == 0x0 && 1344 !ctx->Color.BlendEnabled && 1345 !ctx->Color.AlphaEnabled && 1346 !ctx->Depth.Test && 1347 !ctx->Fog.Enabled && 1348 !ctx->Stencil.Enabled && 1349 !ctx->FragmentProgram.Enabled && 1350 !ctx->VertexProgram.Enabled && 1351 !ctx->Shader.CurrentFragmentProgram && 1352 st_fb_orientation(ctx->ReadBuffer) == st_fb_orientation(ctx->DrawBuffer) && 1353 ctx->DrawBuffer->_NumColorDrawBuffers == 1 && 1354 !ctx->Query.CondRenderQuery) { 1355 struct st_renderbuffer *rbRead, *rbDraw; 1356 GLint drawX, drawY; 1357 1358 /* 1359 * Clip the read region against the src buffer bounds. 1360 * We'll still allocate a temporary buffer/texture for the original 1361 * src region size but we'll only read the region which is on-screen. 1362 * This may mean that we draw garbage pixels into the dest region, but 1363 * that's expected. 1364 */ 1365 readX = srcx; 1366 readY = srcy; 1367 readW = width; 1368 readH = height; 1369 pack = ctx->DefaultPacking; 1370 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) 1371 return GL_TRUE; /* all done */ 1372 1373 /* clip against dest buffer bounds and scissor box */ 1374 drawX = dstx + pack.SkipPixels; 1375 drawY = dsty + pack.SkipRows; 1376 unpack = pack; 1377 if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack)) 1378 return GL_TRUE; /* all done */ 1379 1380 readX = readX - pack.SkipPixels + unpack.SkipPixels; 1381 readY = readY - pack.SkipRows + unpack.SkipRows; 1382 1383 rbRead = st_get_color_read_renderbuffer(ctx); 1384 rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]); 1385 1386 if ((rbRead != rbDraw || 1387 !regions_overlap(readX, readY, drawX, drawY, readW, readH)) && 1388 rbRead->Base.Format == rbDraw->Base.Format) { 1389 struct pipe_box srcBox; 1390 1391 /* flip src/dst position if needed */ 1392 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { 1393 /* both buffers will have the same orientation */ 1394 readY = ctx->ReadBuffer->Height - readY - readH; 1395 drawY = ctx->DrawBuffer->Height - drawY - readH; 1396 } 1397 1398 u_box_2d(readX, readY, readW, readH, &srcBox); 1399 1400 pipe->resource_copy_region(pipe, 1401 rbDraw->texture, 1402 rbDraw->rtt_level, drawX, drawY, 0, 1403 rbRead->texture, 1404 rbRead->rtt_level, &srcBox); 1405 return GL_TRUE; 1406 } 1407 } 1408 1409 return GL_FALSE; 1410} 1411 1412 1413static void 1414st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy, 1415 GLsizei width, GLsizei height, 1416 GLint dstx, GLint dsty, GLenum type) 1417{ 1418 struct st_context *st = st_context(ctx); 1419 struct pipe_context *pipe = st->pipe; 1420 struct pipe_screen *screen = pipe->screen; 1421 struct st_renderbuffer *rbRead; 1422 void *driver_vp, *driver_fp; 1423 struct pipe_resource *pt; 1424 struct pipe_sampler_view *sv[2]; 1425 int num_sampler_view = 1; 1426 GLfloat *color; 1427 enum pipe_format srcFormat, texFormat; 1428 GLboolean invertTex = GL_FALSE; 1429 GLint readX, readY, readW, readH; 1430 GLuint sample_count; 1431 struct gl_pixelstore_attrib pack = ctx->DefaultPacking; 1432 struct st_fp_variant *fpv; 1433 1434 st_validate_state(st); 1435 1436 if (type == GL_DEPTH_STENCIL) { 1437 /* XXX make this more efficient */ 1438 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_STENCIL); 1439 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_DEPTH); 1440 return; 1441 } 1442 1443 if (type == GL_STENCIL) { 1444 /* can't use texturing to do stencil */ 1445 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); 1446 return; 1447 } 1448 1449 if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type)) 1450 return; 1451 1452 /* 1453 * The subsequent code implements glCopyPixels by copying the source 1454 * pixels into a temporary texture that's then applied to a textured quad. 1455 * When we draw the textured quad, all the usual per-fragment operations 1456 * are handled. 1457 */ 1458 1459 1460 /* 1461 * Get vertex/fragment shaders 1462 */ 1463 if (type == GL_COLOR) { 1464 rbRead = st_get_color_read_renderbuffer(ctx); 1465 color = NULL; 1466 1467 fpv = get_color_fp_variant(st); 1468 driver_fp = fpv->driver_shader; 1469 1470 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); 1471 1472 if (st->pixel_xfer.pixelmap_enabled) { 1473 sv[1] = st->pixel_xfer.pixelmap_sampler_view; 1474 num_sampler_view++; 1475 } 1476 } 1477 else { 1478 assert(type == GL_DEPTH); 1479 rbRead = st_renderbuffer(ctx->ReadBuffer-> 1480 Attachment[BUFFER_DEPTH].Renderbuffer); 1481 color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; 1482 1483 fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE); 1484 driver_fp = fpv->driver_shader; 1485 1486 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); 1487 } 1488 1489 /* update fragment program constants */ 1490 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); 1491 1492 sample_count = rbRead->texture->nr_samples; 1493 /* I believe this would be legal, presumably would need to do a resolve 1494 for color, and for depth/stencil spec says to just use one of the 1495 depth/stencil samples per pixel? Need some transfer clarifications. */ 1496 assert(sample_count < 2); 1497 1498 srcFormat = rbRead->texture->format; 1499 1500 if (screen->is_format_supported(screen, srcFormat, st->internal_target, 1501 sample_count, 1502 PIPE_BIND_SAMPLER_VIEW)) { 1503 texFormat = srcFormat; 1504 } 1505 else { 1506 /* srcFormat can't be used as a texture format */ 1507 if (type == GL_DEPTH) { 1508 texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT, 1509 GL_NONE, GL_NONE, st->internal_target, 1510 sample_count, PIPE_BIND_DEPTH_STENCIL); 1511 assert(texFormat != PIPE_FORMAT_NONE); 1512 } 1513 else { 1514 /* default color format */ 1515 texFormat = st_choose_format(screen, GL_RGBA, 1516 GL_NONE, GL_NONE, st->internal_target, 1517 sample_count, PIPE_BIND_SAMPLER_VIEW); 1518 assert(texFormat != PIPE_FORMAT_NONE); 1519 } 1520 } 1521 1522 /* Invert src region if needed */ 1523 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { 1524 srcy = ctx->ReadBuffer->Height - srcy - height; 1525 invertTex = !invertTex; 1526 } 1527 1528 /* Clip the read region against the src buffer bounds. 1529 * We'll still allocate a temporary buffer/texture for the original 1530 * src region size but we'll only read the region which is on-screen. 1531 * This may mean that we draw garbage pixels into the dest region, but 1532 * that's expected. 1533 */ 1534 readX = srcx; 1535 readY = srcy; 1536 readW = width; 1537 readH = height; 1538 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) { 1539 /* The source region is completely out of bounds. Do nothing. 1540 * The GL spec says "Results of copies from outside the window, 1541 * or from regions of the window that are not exposed, are 1542 * hardware dependent and undefined." 1543 */ 1544 return; 1545 } 1546 1547 readW = MAX2(0, readW); 1548 readH = MAX2(0, readH); 1549 1550 /* alloc temporary texture */ 1551 pt = alloc_texture(st, width, height, texFormat); 1552 if (!pt) 1553 return; 1554 1555 sv[0] = st_create_texture_sampler_view(st->pipe, pt); 1556 if (!sv[0]) { 1557 pipe_resource_reference(&pt, NULL); 1558 return; 1559 } 1560 1561 /* Make temporary texture which is a copy of the src region. 1562 */ 1563 if (srcFormat == texFormat) { 1564 struct pipe_box src_box; 1565 u_box_2d(readX, readY, readW, readH, &src_box); 1566 /* copy source framebuffer surface into mipmap/texture */ 1567 pipe->resource_copy_region(pipe, 1568 pt, /* dest tex */ 1569 0, /* dest lvl */ 1570 pack.SkipPixels, pack.SkipRows, 0, /* dest pos */ 1571 rbRead->texture, /* src tex */ 1572 rbRead->rtt_level, /* src lvl */ 1573 &src_box); 1574 1575 } 1576 else { 1577 /* CPU-based fallback/conversion */ 1578 struct pipe_transfer *ptRead = 1579 pipe_get_transfer(st->pipe, rbRead->texture, 1580 rbRead->rtt_level, 1581 rbRead->rtt_face + rbRead->rtt_slice, 1582 PIPE_TRANSFER_READ, 1583 readX, readY, readW, readH); 1584 struct pipe_transfer *ptTex; 1585 enum pipe_transfer_usage transfer_usage; 1586 1587 if (ST_DEBUG & DEBUG_FALLBACK) 1588 debug_printf("%s: fallback processing\n", __FUNCTION__); 1589 1590 if (type == GL_DEPTH && util_format_is_depth_and_stencil(pt->format)) 1591 transfer_usage = PIPE_TRANSFER_READ_WRITE; 1592 else 1593 transfer_usage = PIPE_TRANSFER_WRITE; 1594 1595 ptTex = pipe_get_transfer(st->pipe, pt, 0, 0, transfer_usage, 1596 0, 0, width, height); 1597 1598 /* copy image from ptRead surface to ptTex surface */ 1599 if (type == GL_COLOR) { 1600 /* alternate path using get/put_tile() */ 1601 GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); 1602 enum pipe_format readFormat, drawFormat; 1603 readFormat = util_format_linear(rbRead->texture->format); 1604 drawFormat = util_format_linear(pt->format); 1605 pipe_get_tile_rgba_format(pipe, ptRead, 0, 0, readW, readH, 1606 readFormat, buf); 1607 pipe_put_tile_rgba_format(pipe, ptTex, pack.SkipPixels, pack.SkipRows, 1608 readW, readH, drawFormat, buf); 1609 free(buf); 1610 } 1611 else { 1612 /* GL_DEPTH */ 1613 GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint)); 1614 pipe_get_tile_z(pipe, ptRead, 0, 0, readW, readH, buf); 1615 pipe_put_tile_z(pipe, ptTex, pack.SkipPixels, pack.SkipRows, 1616 readW, readH, buf); 1617 free(buf); 1618 } 1619 1620 pipe->transfer_destroy(pipe, ptRead); 1621 pipe->transfer_destroy(pipe, ptTex); 1622 } 1623 1624 /* OK, the texture 'pt' contains the src image/pixels. Now draw a 1625 * textured quad with that texture. 1626 */ 1627 draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], 1628 width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, 1629 sv, 1630 num_sampler_view, 1631 driver_vp, 1632 driver_fp, 1633 color, invertTex, GL_FALSE, GL_FALSE); 1634 1635 pipe_resource_reference(&pt, NULL); 1636 pipe_sampler_view_reference(&sv[0], NULL); 1637} 1638 1639 1640 1641void st_init_drawpixels_functions(struct dd_function_table *functions) 1642{ 1643 functions->DrawPixels = st_DrawPixels; 1644 functions->CopyPixels = st_CopyPixels; 1645} 1646 1647 1648void 1649st_destroy_drawpix(struct st_context *st) 1650{ 1651 GLuint i; 1652 1653 for (i = 0; i < Elements(st->drawpix.shaders); i++) { 1654 if (st->drawpix.shaders[i]) 1655 _mesa_reference_fragprog(st->ctx, &st->drawpix.shaders[i], NULL); 1656 } 1657 1658 st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL); 1659 if (st->drawpix.vert_shaders[0]) 1660 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[0]); 1661 if (st->drawpix.vert_shaders[1]) 1662 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[1]); 1663} 1664 1665#endif /* FEATURE_drawpix */ 1666