st_cb_bitmap.c revision 54f94a790e4488445347abcff9a636a9c440d7f9
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/macros.h" 37#include "main/texformat.h" 38#include "shader/program.h" 39#include "shader/prog_parameter.h" 40#include "shader/prog_print.h" 41 42#include "st_context.h" 43#include "st_atom.h" 44#include "st_atom_constbuf.h" 45#include "st_program.h" 46#include "st_cb_bitmap.h" 47#include "st_cb_program.h" 48#include "st_mesa_to_tgsi.h" 49#include "st_texture.h" 50#include "pipe/p_context.h" 51#include "pipe/p_defines.h" 52#include "pipe/p_inlines.h" 53#include "util/p_tile.h" 54#include "util/u_draw_quad.h" 55#include "util/u_simple_shaders.h" 56#include "shader/prog_instruction.h" 57#include "cso_cache/cso_context.h" 58 59 60 61/** 62 * glBitmaps are drawn as textured quads. The user's bitmap pattern 63 * is stored in a texture image. An alpha8 texture format is used. 64 * The fragment shader samples a bit (texel) from the texture, then 65 * discards the fragment if the bit is off. 66 * 67 * Note that we actually store the inverse image of the bitmap to 68 * simplify the fragment program. An "on" bit gets stored as texel=0x0 69 * and an "off" bit is stored as texel=0xff. Then we kill the 70 * fragment if the negated texel value is less than zero. 71 */ 72 73 74/** 75 * The bitmap cache attempts to accumulate multiple glBitmap calls in a 76 * buffer which is then rendered en mass upon a flush, state change, etc. 77 * A wide, short buffer is used to target the common case of a series 78 * of glBitmap calls being used to draw text. 79 */ 80static GLboolean UseBitmapCache = GL_TRUE; 81 82 83#define BITMAP_CACHE_WIDTH 512 84#define BITMAP_CACHE_HEIGHT 32 85 86struct bitmap_cache 87{ 88 /** Window pos to render the cached image */ 89 GLint xpos, ypos; 90 /** Bounds of region used in window coords */ 91 GLint xmin, ymin, xmax, ymax; 92 93 struct pipe_texture *texture; 94 struct pipe_surface *surf; 95 96 GLboolean empty; 97 98 /** An I8 texture image: */ 99 ubyte *buffer; 100}; 101 102 103 104 105/** 106 * Make fragment program for glBitmap: 107 * Sample the texture and kill the fragment if the bit is 0. 108 * This program will be combined with the user's fragment program. 109 */ 110static struct st_fragment_program * 111make_bitmap_fragment_program(GLcontext *ctx, GLuint samplerIndex) 112{ 113 struct st_fragment_program *stfp; 114 struct gl_program *p; 115 GLuint ic = 0; 116 117 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 118 if (!p) 119 return NULL; 120 121 p->NumInstructions = 3; 122 123 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 124 if (!p->Instructions) { 125 ctx->Driver.DeleteProgram(ctx, p); 126 return NULL; 127 } 128 _mesa_init_instructions(p->Instructions, p->NumInstructions); 129 130 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 131 p->Instructions[ic].Opcode = OPCODE_TEX; 132 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 133 p->Instructions[ic].DstReg.Index = 0; 134 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 135 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 136 p->Instructions[ic].TexSrcUnit = samplerIndex; 137 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 138 ic++; 139 140 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 141 p->Instructions[ic].Opcode = OPCODE_KIL; 142 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 143 p->Instructions[ic].SrcReg[0].Index = 0; 144 p->Instructions[ic].SrcReg[0].NegateBase = NEGATE_XYZW; 145 ic++; 146 147 /* END; */ 148 p->Instructions[ic++].Opcode = OPCODE_END; 149 150 assert(ic == p->NumInstructions); 151 152 p->InputsRead = FRAG_BIT_TEX0; 153 p->OutputsWritten = 0x0; 154 p->SamplersUsed = (1 << samplerIndex); 155 156 stfp = (struct st_fragment_program *) p; 157 stfp->Base.UsesKill = GL_TRUE; 158 st_translate_fragment_program(ctx->st, stfp, NULL); 159 160 return stfp; 161} 162 163 164static int 165find_free_bit(uint bitfield) 166{ 167 int i; 168 for (i = 0; i < 32; i++) { 169 if ((bitfield & (1 << i)) == 0) { 170 return i; 171 } 172 } 173 return -1; 174} 175 176 177/** 178 * Combine basic bitmap fragment program with the user-defined program. 179 */ 180static struct st_fragment_program * 181combined_bitmap_fragment_program(GLcontext *ctx) 182{ 183 struct st_context *st = ctx->st; 184 struct st_fragment_program *stfp = st->fp; 185 186 if (!stfp->bitmap_program) { 187 /* 188 * Generate new program which is the user-defined program prefixed 189 * with the bitmap sampler/kill instructions. 190 */ 191 struct st_fragment_program *bitmap_prog; 192 uint sampler; 193 194 sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); 195 bitmap_prog = make_bitmap_fragment_program(ctx, sampler); 196 197 stfp->bitmap_program = (struct st_fragment_program *) 198 _mesa_combine_programs(ctx, 199 &bitmap_prog->Base.Base, &stfp->Base.Base); 200 stfp->bitmap_program->bitmap_sampler = sampler; 201#if 0 202 { 203 struct gl_program *p = &stfp->bitmap_program->Base.Base; 204 printf("Combined bitmap program:\n"); 205 _mesa_print_program(p); 206 printf("InputsRead: 0x%x\n", p->InputsRead); 207 printf("OutputsWritten: 0x%x\n", p->OutputsWritten); 208 _mesa_print_parameter_list(p->Parameters); 209 } 210#endif 211 212 /* translate to TGSI tokens */ 213 st_translate_fragment_program(st, stfp->bitmap_program, NULL); 214 } 215 216 /* Ideally we'd have updated the pipe constants during the normal 217 * st/atom mechanism. But we can't since this is specific to glBitmap. 218 */ 219 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 220 221 return stfp->bitmap_program; 222} 223 224 225/** 226 * Copy user-provide bitmap bits into texture buffer, expanding 227 * bits into texels. 228 * "On" bits will set texels to 0xff. 229 * "Off" bits will not modify texels. 230 * Note that the image is actually going to be upside down in 231 * the texture. We deal with that with texcoords. 232 */ 233static void 234unpack_bitmap(struct st_context *st, 235 GLint px, GLint py, GLsizei width, GLsizei height, 236 const struct gl_pixelstore_attrib *unpack, 237 const GLubyte *bitmap, 238 ubyte *destBuffer, uint destStride) 239{ 240 GLint row, col; 241 242#define SET_PIXEL(COL, ROW) \ 243 destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0; 244 245 for (row = 0; row < height; row++) { 246 const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, 247 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); 248 249 if (unpack->LsbFirst) { 250 /* Lsb first */ 251 GLubyte mask = 1U << (unpack->SkipPixels & 0x7); 252 for (col = 0; col < width; col++) { 253 254 if (*src & mask) { 255 SET_PIXEL(col, row); 256 } 257 258 if (mask == 128U) { 259 src++; 260 mask = 1U; 261 } 262 else { 263 mask = mask << 1; 264 } 265 } 266 267 /* get ready for next row */ 268 if (mask != 1) 269 src++; 270 } 271 else { 272 /* Msb first */ 273 GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); 274 for (col = 0; col < width; col++) { 275 276 if (*src & mask) { 277 SET_PIXEL(col, row); 278 } 279 280 if (mask == 1U) { 281 src++; 282 mask = 128U; 283 } 284 else { 285 mask = mask >> 1; 286 } 287 } 288 289 /* get ready for next row */ 290 if (mask != 128) 291 src++; 292 } 293 294 } /* row */ 295 296#undef SET_PIXEL 297} 298 299 300/** 301 * Create a texture which represents a bitmap image. 302 */ 303static struct pipe_texture * 304make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, 305 const struct gl_pixelstore_attrib *unpack, 306 const GLubyte *bitmap) 307{ 308 struct pipe_context *pipe = ctx->st->pipe; 309 struct pipe_screen *screen = pipe->screen; 310 struct pipe_surface *surface; 311 ubyte *dest; 312 struct pipe_texture *pt; 313 314 /* PBO source... */ 315 bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); 316 if (!bitmap) { 317 return NULL; 318 } 319 320 /** 321 * Create texture to hold bitmap pattern. 322 */ 323 pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format, 324 0, width, height, 1, 0); 325 if (!pt) { 326 _mesa_unmap_bitmap_pbo(ctx, unpack); 327 return NULL; 328 } 329 330 surface = screen->get_tex_surface(screen, pt, 0, 0, 0); 331 332 /* map texture surface */ 333 dest = pipe_surface_map(surface); 334 335 /* Put image into texture surface */ 336 memset(dest, 0xff, height * surface->pitch); 337 unpack_bitmap(ctx->st, 0, 0, width, height, unpack, bitmap, 338 dest, surface->pitch); 339 340 _mesa_unmap_bitmap_pbo(ctx, unpack); 341 342 /* Release surface */ 343 pipe_surface_unmap(surface); 344 pipe_surface_reference(&surface, NULL); 345 pipe->texture_update(pipe, pt, 0, 0x1); 346 347 return pt; 348} 349 350 351static void 352setup_bitmap_vertex_data(struct st_context *st, 353 int x, int y, int width, int height, 354 float z, const float color[4]) 355{ 356 struct pipe_context *pipe = st->pipe; 357 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 358 const GLfloat fb_width = fb->Width; 359 const GLfloat fb_height = fb->Height; 360 const GLfloat x0 = x; 361 const GLfloat x1 = x + width; 362 const GLfloat y0 = y; 363 const GLfloat y1 = y + height; 364 const GLfloat sLeft = 0.0F, sRight = 1.0F; 365 const GLfloat tTop = 0.0, tBot = 1.0 - tTop; 366 const GLfloat clip_x0 = x0 / fb_width * 2.0 - 1.0; 367 const GLfloat clip_y0 = y0 / fb_height * 2.0 - 1.0; 368 const GLfloat clip_x1 = x1 / fb_width * 2.0 - 1.0; 369 const GLfloat clip_y1 = y1 / fb_height * 2.0 - 1.0; 370 GLuint i; 371 void *buf; 372 373 if (!st->bitmap.vbuf) { 374 st->bitmap.vbuf = pipe_buffer_create(pipe, 32, PIPE_BUFFER_USAGE_VERTEX, 375 sizeof(st->bitmap.vertices)); 376 } 377 378 /* Positions are in clip coords since we need to do clipping in case 379 * the bitmap quad goes beyond the window bounds. 380 */ 381 st->bitmap.vertices[0][0][0] = clip_x0; 382 st->bitmap.vertices[0][0][1] = clip_y0; 383 st->bitmap.vertices[0][2][0] = sLeft; 384 st->bitmap.vertices[0][2][1] = tTop; 385 386 st->bitmap.vertices[1][0][0] = clip_x1; 387 st->bitmap.vertices[1][0][1] = clip_y0; 388 st->bitmap.vertices[1][2][0] = sRight; 389 st->bitmap.vertices[1][2][1] = tTop; 390 391 st->bitmap.vertices[2][0][0] = clip_x1; 392 st->bitmap.vertices[2][0][1] = clip_y1; 393 st->bitmap.vertices[2][2][0] = sRight; 394 st->bitmap.vertices[2][2][1] = tBot; 395 396 st->bitmap.vertices[3][0][0] = clip_x0; 397 st->bitmap.vertices[3][0][1] = clip_y1; 398 st->bitmap.vertices[3][2][0] = sLeft; 399 st->bitmap.vertices[3][2][1] = tBot; 400 401 /* same for all verts: */ 402 for (i = 0; i < 4; i++) { 403 st->bitmap.vertices[i][0][2] = z; 404 st->bitmap.vertices[i][0][3] = 1.0; 405 st->bitmap.vertices[i][1][0] = color[0]; 406 st->bitmap.vertices[i][1][1] = color[1]; 407 st->bitmap.vertices[i][1][2] = color[2]; 408 st->bitmap.vertices[i][1][3] = color[3]; 409 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 410 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 411 } 412 413 /* put vertex data into vbuf */ 414 buf = pipe_buffer_map(pipe, st->bitmap.vbuf, PIPE_BUFFER_USAGE_CPU_WRITE); 415 memcpy(buf, st->bitmap.vertices, sizeof(st->bitmap.vertices)); 416 pipe_buffer_unmap(pipe, st->bitmap.vbuf); 417} 418 419 420 421/** 422 * Render a glBitmap by drawing a textured quad 423 */ 424static void 425draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, 426 GLsizei width, GLsizei height, 427 struct pipe_texture *pt) 428{ 429 struct st_context *st = ctx->st; 430 struct pipe_context *pipe = ctx->st->pipe; 431 struct cso_context *cso = ctx->st->cso_context; 432 struct st_fragment_program *stfp; 433 GLuint maxSize; 434 435 stfp = combined_bitmap_fragment_program(ctx); 436 437 /* limit checks */ 438 /* XXX if the bitmap is larger than the max texture size, break 439 * it up into chunks. 440 */ 441 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 442 assert(width <= maxSize); 443 assert(height <= maxSize); 444 445 cso_save_rasterizer(cso); 446 cso_save_samplers(cso); 447 cso_save_sampler_textures(cso); 448 cso_save_viewport(cso); 449 cso_save_fragment_shader(cso); 450 cso_save_vertex_shader(cso); 451 452 /* rasterizer state: just scissor */ 453 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 454 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 455 456 /* fragment shader state: TEX lookup program */ 457 cso_set_fragment_shader_handle(cso, stfp->driver_shader); 458 459 /* vertex shader state: position + texcoord pass-through */ 460 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 461 462 /* user samplers, plus our bitmap sampler */ 463 { 464 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 465 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); 466 uint i; 467 for (i = 0; i < st->state.num_samplers; i++) { 468 samplers[i] = &st->state.samplers[i]; 469 } 470 samplers[stfp->bitmap_sampler] = &st->bitmap.sampler; 471 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); } 472 473 /* user textures, plus the bitmap texture */ 474 { 475 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 476 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 477 memcpy(textures, st->state.sampler_texture, sizeof(textures)); 478 textures[stfp->bitmap_sampler] = pt; 479 cso_set_sampler_textures(cso, num, textures); 480 } 481 482 /* viewport state: viewport matching window dims */ 483 { 484 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 485 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 486 const float width = fb->Width; 487 const float height = fb->Height; 488 struct pipe_viewport_state vp; 489 vp.scale[0] = 0.5 * width; 490 vp.scale[1] = height * (invert ? -0.5 : 0.5); 491 vp.scale[2] = 1.0; 492 vp.scale[3] = 1.0; 493 vp.translate[0] = 0.5 * width; 494 vp.translate[1] = 0.5 * height; 495 vp.translate[2] = 0.0; 496 vp.translate[3] = 0.0; 497 cso_set_viewport(cso, &vp); 498 } 499 500 /* draw textured quad */ 501 setup_bitmap_vertex_data(st, x, y, width, height, 502 ctx->Current.RasterPos[2], 503 ctx->Current.RasterColor); 504 505 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, 506 PIPE_PRIM_TRIANGLE_FAN, 507 4, /* verts */ 508 3); /* attribs/vert */ 509 510 511 /* restore state */ 512 cso_restore_rasterizer(cso); 513 cso_restore_samplers(cso); 514 cso_restore_sampler_textures(cso); 515 cso_restore_viewport(cso); 516 cso_restore_fragment_shader(cso); 517 cso_restore_vertex_shader(cso); 518} 519 520 521static void 522reset_cache(struct st_context *st) 523{ 524 struct pipe_context *pipe = st->pipe; 525 struct pipe_screen *screen = pipe->screen; 526 struct bitmap_cache *cache = st->bitmap.cache; 527 528 //memset(cache->buffer, 0xff, sizeof(cache->buffer)); 529 cache->empty = GL_TRUE; 530 531 cache->xmin = 1000000; 532 cache->xmax = -1000000; 533 cache->ymin = 1000000; 534 cache->ymax = -1000000; 535 536 assert(!cache->texture); 537 538 /* allocate a new texture */ 539 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 540 st->bitmap.tex_format, 0, 541 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 542 1, 0); 543 544 /* Map the texture surface. 545 * Subsequent glBitmap calls will write into the texture image. 546 */ 547 cache->surf = screen->get_tex_surface(screen, cache->texture, 0, 0, 0); 548 cache->buffer = pipe_surface_map(cache->surf); 549 550 /* init image to all 0xff */ 551 memset(cache->buffer, 0xff, BITMAP_CACHE_WIDTH * BITMAP_CACHE_HEIGHT); 552} 553 554 555/** 556 * If there's anything in the bitmap cache, draw/flush it now. 557 */ 558void 559st_flush_bitmap_cache(struct st_context *st) 560{ 561 if (!st->bitmap.cache->empty) { 562 if (st->ctx->DrawBuffer) { 563 struct bitmap_cache *cache = st->bitmap.cache; 564 struct pipe_context *pipe = st->pipe; 565 566 assert(cache->xmin <= cache->xmax); 567 /* 568 printf("flush size %d x %d at %d, %d\n", 569 cache->xmax - cache->xmin, 570 cache->ymax - cache->ymin, 571 cache->xpos, cache->ypos); 572 */ 573 574 /* The texture surface has been mapped until now. 575 * So unmap and release the texture surface before drawing. 576 */ 577 pipe_surface_unmap(cache->surf); 578 pipe_surface_reference(&cache->surf, NULL); 579 580 /* XXX is this needed? */ 581 pipe->texture_update(pipe, cache->texture, 0, 0x1); 582 583 draw_bitmap_quad(st->ctx, 584 cache->xpos, 585 cache->ypos, 586 st->ctx->Current.RasterPos[2], 587 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 588 cache->texture); 589 590 /* release/free the texture */ 591 pipe_texture_reference(&cache->texture, NULL); 592 } 593 reset_cache(st); 594 } 595} 596 597 598/** 599 * Try to accumulate this glBitmap call in the bitmap cache. 600 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 601 */ 602static GLboolean 603accum_bitmap(struct st_context *st, 604 GLint x, GLint y, GLsizei width, GLsizei height, 605 const struct gl_pixelstore_attrib *unpack, 606 const GLubyte *bitmap ) 607{ 608 struct bitmap_cache *cache = st->bitmap.cache; 609 int px = -999, py; 610 611 if (width > BITMAP_CACHE_WIDTH || 612 height > BITMAP_CACHE_HEIGHT) 613 return GL_FALSE; /* too big to cache */ 614 615 if (!cache->empty) { 616 px = x - cache->xpos; /* pos in buffer */ 617 py = y - cache->ypos; 618 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 619 py < 0 || py + height > BITMAP_CACHE_HEIGHT) { 620 /* This bitmap would extend beyond cache bounds, 621 * so flush and continue. 622 */ 623 st_flush_bitmap_cache(st); 624 } 625 } 626 627 if (cache->empty) { 628 /* Initialize. Center bitmap vertically in the buffer. */ 629 px = 0; 630 py = (BITMAP_CACHE_HEIGHT - height) / 2; 631 cache->xpos = x; 632 cache->ypos = y - py; 633 cache->empty = GL_FALSE; 634 } 635 636 assert(px != -999); 637 638 if (x < cache->xmin) 639 cache->xmin = x; 640 if (y < cache->ymin) 641 cache->ymin = y; 642 if (x + width > cache->xmax) 643 cache->xmax = x + width; 644 if (y + height > cache->ymax) 645 cache->ymax = y + height; 646 647 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 648 cache->buffer, BITMAP_CACHE_WIDTH); 649 650 return GL_TRUE; /* accumulated */ 651} 652 653 654 655/** 656 * Called via ctx->Driver.Bitmap() 657 */ 658static void 659st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 660 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 661{ 662 struct st_context *st = ctx->st; 663 struct pipe_texture *pt; 664 665 st_validate_state(st); 666 667 if (!st->bitmap.vs) { 668 /* create pass-through vertex shader now */ 669 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 670 TGSI_SEMANTIC_COLOR, 671 TGSI_SEMANTIC_GENERIC }; 672 const uint semantic_indexes[] = { 0, 0, 0 }; 673 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 674 semantic_names, 675 semantic_indexes, 676 &st->bitmap.vert_shader); 677 } 678 679 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 680 return; 681 682 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 683 if (pt) { 684 assert(pt->target == PIPE_TEXTURE_2D); 685 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 686 width, height, pt); 687 /* release/free the texture */ 688 pipe_texture_reference(&pt, NULL); 689 } 690} 691 692 693/** Per-context init */ 694void 695st_init_bitmap_functions(struct dd_function_table *functions) 696{ 697 functions->Bitmap = st_Bitmap; 698} 699 700 701/** Per-context init */ 702void 703st_init_bitmap(struct st_context *st) 704{ 705 struct pipe_sampler_state *sampler = &st->bitmap.sampler; 706 struct pipe_context *pipe = st->pipe; 707 struct pipe_screen *screen = pipe->screen; 708 709 /* init sampler state once */ 710 memset(sampler, 0, sizeof(*sampler)); 711 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 712 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 713 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 714 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 715 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 716 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 717 sampler->normalized_coords = 1; 718 719 /* init baseline rasterizer state once */ 720 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 721 st->bitmap.rasterizer.gl_rasterization_rules = 1; 722 st->bitmap.rasterizer.bypass_vs = 1; 723 724 /* find a usable texture format */ 725 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE)) { 726 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 727 } 728 else { 729 /* XXX support more formats */ 730 assert(0); 731 } 732 733 /* alloc bitmap cache object */ 734 st->bitmap.cache = CALLOC_STRUCT(bitmap_cache); 735 736 reset_cache(st); 737} 738 739 740/** Per-context tear-down */ 741void 742st_destroy_bitmap(struct st_context *st) 743{ 744 struct pipe_context *pipe = st->pipe; 745 746#if 0 747 if (st->bitmap.combined_prog) { 748 st_delete_program(st->ctx, &st->bitmap.combined_prog->Base.Base); 749 } 750 751 if (st->bitmap.program) { 752 st_delete_program(st->ctx, &st->bitmap.program->Base.Base); 753 } 754#endif 755 if (st->bitmap.vs) { 756 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 757 st->bitmap.vs = NULL; 758 } 759 760 if (st->bitmap.vbuf) { 761 pipe_buffer_destroy(pipe, st->bitmap.vbuf); 762 st->bitmap.vbuf = NULL; 763 } 764 765 if (st->bitmap.cache) { 766 pipe_texture_release(&st->bitmap.cache->texture); 767 FREE(st->bitmap.cache); 768 st->bitmap.cache = NULL; 769 } 770} 771