st_cb_bitmap.c revision 318f00ae9f9bca783d1d3aa7700109402f3e52cb
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 GLfloat color[4]; 94 95 struct pipe_texture *texture; 96 struct pipe_surface *surf; 97 98 GLboolean empty; 99 100 /** An I8 texture image: */ 101 ubyte *buffer; 102}; 103 104 105 106 107/** 108 * Make fragment program for glBitmap: 109 * Sample the texture and kill the fragment if the bit is 0. 110 * This program will be combined with the user's fragment program. 111 */ 112static struct st_fragment_program * 113make_bitmap_fragment_program(GLcontext *ctx, GLuint samplerIndex) 114{ 115 struct st_fragment_program *stfp; 116 struct gl_program *p; 117 GLuint ic = 0; 118 119 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 120 if (!p) 121 return NULL; 122 123 p->NumInstructions = 3; 124 125 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 126 if (!p->Instructions) { 127 ctx->Driver.DeleteProgram(ctx, p); 128 return NULL; 129 } 130 _mesa_init_instructions(p->Instructions, p->NumInstructions); 131 132 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 133 p->Instructions[ic].Opcode = OPCODE_TEX; 134 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 135 p->Instructions[ic].DstReg.Index = 0; 136 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 137 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 138 p->Instructions[ic].TexSrcUnit = samplerIndex; 139 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 140 ic++; 141 142 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 143 p->Instructions[ic].Opcode = OPCODE_KIL; 144 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 145 p->Instructions[ic].SrcReg[0].Index = 0; 146 p->Instructions[ic].SrcReg[0].NegateBase = NEGATE_XYZW; 147 ic++; 148 149 /* END; */ 150 p->Instructions[ic++].Opcode = OPCODE_END; 151 152 assert(ic == p->NumInstructions); 153 154 p->InputsRead = FRAG_BIT_TEX0; 155 p->OutputsWritten = 0x0; 156 p->SamplersUsed = (1 << samplerIndex); 157 158 stfp = (struct st_fragment_program *) p; 159 stfp->Base.UsesKill = GL_TRUE; 160 st_translate_fragment_program(ctx->st, stfp, NULL); 161 162 return stfp; 163} 164 165 166static int 167find_free_bit(uint bitfield) 168{ 169 int i; 170 for (i = 0; i < 32; i++) { 171 if ((bitfield & (1 << i)) == 0) { 172 return i; 173 } 174 } 175 return -1; 176} 177 178 179/** 180 * Combine basic bitmap fragment program with the user-defined program. 181 */ 182static struct st_fragment_program * 183combined_bitmap_fragment_program(GLcontext *ctx) 184{ 185 struct st_context *st = ctx->st; 186 struct st_fragment_program *stfp = st->fp; 187 188 if (!stfp->bitmap_program) { 189 /* 190 * Generate new program which is the user-defined program prefixed 191 * with the bitmap sampler/kill instructions. 192 */ 193 struct st_fragment_program *bitmap_prog; 194 uint sampler; 195 196 sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); 197 bitmap_prog = make_bitmap_fragment_program(ctx, sampler); 198 199 stfp->bitmap_program = (struct st_fragment_program *) 200 _mesa_combine_programs(ctx, 201 &bitmap_prog->Base.Base, &stfp->Base.Base); 202 stfp->bitmap_program->bitmap_sampler = sampler; 203 204 /* done with this after combining */ 205 st_reference_fragprog(st, &bitmap_prog, NULL); 206 207#if 0 208 { 209 struct gl_program *p = &stfp->bitmap_program->Base.Base; 210 printf("Combined bitmap program:\n"); 211 _mesa_print_program(p); 212 printf("InputsRead: 0x%x\n", p->InputsRead); 213 printf("OutputsWritten: 0x%x\n", p->OutputsWritten); 214 _mesa_print_parameter_list(p->Parameters); 215 } 216#endif 217 218 /* translate to TGSI tokens */ 219 st_translate_fragment_program(st, stfp->bitmap_program, NULL); 220 } 221 222 /* Ideally we'd have updated the pipe constants during the normal 223 * st/atom mechanism. But we can't since this is specific to glBitmap. 224 */ 225 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 226 227 return stfp->bitmap_program; 228} 229 230 231/** 232 * Copy user-provide bitmap bits into texture buffer, expanding 233 * bits into texels. 234 * "On" bits will set texels to 0xff. 235 * "Off" bits will not modify texels. 236 * Note that the image is actually going to be upside down in 237 * the texture. We deal with that with texcoords. 238 */ 239static void 240unpack_bitmap(struct st_context *st, 241 GLint px, GLint py, GLsizei width, GLsizei height, 242 const struct gl_pixelstore_attrib *unpack, 243 const GLubyte *bitmap, 244 ubyte *destBuffer, uint destStride) 245{ 246 GLint row, col; 247 248#define SET_PIXEL(COL, ROW) \ 249 destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0; 250 251 for (row = 0; row < height; row++) { 252 const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, 253 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); 254 255 if (unpack->LsbFirst) { 256 /* Lsb first */ 257 GLubyte mask = 1U << (unpack->SkipPixels & 0x7); 258 for (col = 0; col < width; col++) { 259 260 if (*src & mask) { 261 SET_PIXEL(col, row); 262 } 263 264 if (mask == 128U) { 265 src++; 266 mask = 1U; 267 } 268 else { 269 mask = mask << 1; 270 } 271 } 272 273 /* get ready for next row */ 274 if (mask != 1) 275 src++; 276 } 277 else { 278 /* Msb first */ 279 GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); 280 for (col = 0; col < width; col++) { 281 282 if (*src & mask) { 283 SET_PIXEL(col, row); 284 } 285 286 if (mask == 1U) { 287 src++; 288 mask = 128U; 289 } 290 else { 291 mask = mask >> 1; 292 } 293 } 294 295 /* get ready for next row */ 296 if (mask != 128) 297 src++; 298 } 299 300 } /* row */ 301 302#undef SET_PIXEL 303} 304 305 306/** 307 * Create a texture which represents a bitmap image. 308 */ 309static struct pipe_texture * 310make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, 311 const struct gl_pixelstore_attrib *unpack, 312 const GLubyte *bitmap) 313{ 314 struct pipe_context *pipe = ctx->st->pipe; 315 struct pipe_screen *screen = pipe->screen; 316 struct pipe_surface *surface; 317 ubyte *dest; 318 struct pipe_texture *pt; 319 320 /* PBO source... */ 321 bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); 322 if (!bitmap) { 323 return NULL; 324 } 325 326 /** 327 * Create texture to hold bitmap pattern. 328 */ 329 pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format, 330 0, width, height, 1, 0, 331 PIPE_TEXTURE_USAGE_SAMPLER); 332 if (!pt) { 333 _mesa_unmap_bitmap_pbo(ctx, unpack); 334 return NULL; 335 } 336 337 surface = screen->get_tex_surface(screen, pt, 0, 0, 0, 338 PIPE_BUFFER_USAGE_CPU_WRITE); 339 340 /* map texture surface */ 341 dest = screen->surface_map(screen, surface, PIPE_BUFFER_USAGE_CPU_WRITE); 342 343 /* Put image into texture surface */ 344 memset(dest, 0xff, height * surface->pitch); 345 unpack_bitmap(ctx->st, 0, 0, width, height, unpack, bitmap, 346 dest, surface->pitch); 347 348 _mesa_unmap_bitmap_pbo(ctx, unpack); 349 350 /* Release surface */ 351 screen->surface_unmap(screen, surface); 352 pipe_surface_reference(&surface, NULL); 353 354 return pt; 355} 356 357 358static void 359setup_bitmap_vertex_data(struct st_context *st, 360 int x, int y, int width, int height, 361 float z, const float color[4]) 362{ 363 struct pipe_context *pipe = st->pipe; 364 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 365 const GLfloat fb_width = (GLfloat)fb->Width; 366 const GLfloat fb_height = (GLfloat)fb->Height; 367 const GLfloat x0 = (GLfloat)x; 368 const GLfloat x1 = (GLfloat)(x + width); 369 const GLfloat y0 = (GLfloat)y; 370 const GLfloat y1 = (GLfloat)(y + height); 371 const GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 372 const GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop; 373 const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); 374 const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); 375 const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); 376 const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); 377 GLuint i; 378 void *buf; 379 380 if (!st->bitmap.vbuf) { 381 st->bitmap.vbuf = pipe_buffer_create(pipe, 32, PIPE_BUFFER_USAGE_VERTEX, 382 sizeof(st->bitmap.vertices)); 383 } 384 385 /* Positions are in clip coords since we need to do clipping in case 386 * the bitmap quad goes beyond the window bounds. 387 */ 388 st->bitmap.vertices[0][0][0] = clip_x0; 389 st->bitmap.vertices[0][0][1] = clip_y0; 390 st->bitmap.vertices[0][2][0] = sLeft; 391 st->bitmap.vertices[0][2][1] = tTop; 392 393 st->bitmap.vertices[1][0][0] = clip_x1; 394 st->bitmap.vertices[1][0][1] = clip_y0; 395 st->bitmap.vertices[1][2][0] = sRight; 396 st->bitmap.vertices[1][2][1] = tTop; 397 398 st->bitmap.vertices[2][0][0] = clip_x1; 399 st->bitmap.vertices[2][0][1] = clip_y1; 400 st->bitmap.vertices[2][2][0] = sRight; 401 st->bitmap.vertices[2][2][1] = tBot; 402 403 st->bitmap.vertices[3][0][0] = clip_x0; 404 st->bitmap.vertices[3][0][1] = clip_y1; 405 st->bitmap.vertices[3][2][0] = sLeft; 406 st->bitmap.vertices[3][2][1] = tBot; 407 408 /* same for all verts: */ 409 for (i = 0; i < 4; i++) { 410 st->bitmap.vertices[i][0][2] = z; 411 st->bitmap.vertices[i][0][3] = 1.0; 412 st->bitmap.vertices[i][1][0] = color[0]; 413 st->bitmap.vertices[i][1][1] = color[1]; 414 st->bitmap.vertices[i][1][2] = color[2]; 415 st->bitmap.vertices[i][1][3] = color[3]; 416 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 417 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 418 } 419 420 /* put vertex data into vbuf */ 421 buf = pipe_buffer_map(pipe, st->bitmap.vbuf, PIPE_BUFFER_USAGE_CPU_WRITE); 422 memcpy(buf, st->bitmap.vertices, sizeof(st->bitmap.vertices)); 423 pipe_buffer_unmap(pipe, st->bitmap.vbuf); 424} 425 426 427 428/** 429 * Render a glBitmap by drawing a textured quad 430 */ 431static void 432draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, 433 GLsizei width, GLsizei height, 434 struct pipe_texture *pt, 435 const GLfloat *color) 436{ 437 struct st_context *st = ctx->st; 438 struct pipe_context *pipe = ctx->st->pipe; 439 struct cso_context *cso = ctx->st->cso_context; 440 struct st_fragment_program *stfp; 441 GLuint maxSize; 442 443 stfp = combined_bitmap_fragment_program(ctx); 444 445 /* limit checks */ 446 /* XXX if the bitmap is larger than the max texture size, break 447 * it up into chunks. 448 */ 449 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 450 assert(width <= (GLsizei)maxSize); 451 assert(height <= (GLsizei)maxSize); 452 453 cso_save_rasterizer(cso); 454 cso_save_samplers(cso); 455 cso_save_sampler_textures(cso); 456 cso_save_viewport(cso); 457 cso_save_fragment_shader(cso); 458 cso_save_vertex_shader(cso); 459 460 /* rasterizer state: just scissor */ 461 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 462 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 463 464 /* fragment shader state: TEX lookup program */ 465 cso_set_fragment_shader_handle(cso, stfp->driver_shader); 466 467 /* vertex shader state: position + texcoord pass-through */ 468 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 469 470 /* user samplers, plus our bitmap sampler */ 471 { 472 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 473 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); 474 uint i; 475 for (i = 0; i < st->state.num_samplers; i++) { 476 samplers[i] = &st->state.samplers[i]; 477 } 478 samplers[stfp->bitmap_sampler] = &st->bitmap.sampler; 479 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); } 480 481 /* user textures, plus the bitmap texture */ 482 { 483 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 484 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 485 memcpy(textures, st->state.sampler_texture, sizeof(textures)); 486 textures[stfp->bitmap_sampler] = pt; 487 cso_set_sampler_textures(cso, num, textures); 488 } 489 490 /* viewport state: viewport matching window dims */ 491 { 492 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 493 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 494 const GLfloat width = (GLfloat)fb->Width; 495 const GLfloat height = (GLfloat)fb->Height; 496 struct pipe_viewport_state vp; 497 vp.scale[0] = 0.5 * width; 498 vp.scale[1] = (GLfloat)(height * (invert ? -0.5 : 0.5)); 499 vp.scale[2] = 1.0; 500 vp.scale[3] = 1.0; 501 vp.translate[0] = (GLfloat)(0.5 * width); 502 vp.translate[1] = (GLfloat)(0.5 * height); 503 vp.translate[2] = 0.0; 504 vp.translate[3] = 0.0; 505 cso_set_viewport(cso, &vp); 506 } 507 508 /* draw textured quad */ 509 setup_bitmap_vertex_data(st, x, y, width, height, 510 ctx->Current.RasterPos[2], 511 color); 512 513 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, 514 PIPE_PRIM_TRIANGLE_FAN, 515 4, /* verts */ 516 3); /* attribs/vert */ 517 518 519 /* restore state */ 520 cso_restore_rasterizer(cso); 521 cso_restore_samplers(cso); 522 cso_restore_sampler_textures(cso); 523 cso_restore_viewport(cso); 524 cso_restore_fragment_shader(cso); 525 cso_restore_vertex_shader(cso); 526} 527 528 529static void 530reset_cache(struct st_context *st) 531{ 532 struct pipe_context *pipe = st->pipe; 533 struct pipe_screen *screen = pipe->screen; 534 struct bitmap_cache *cache = st->bitmap.cache; 535 536 //memset(cache->buffer, 0xff, sizeof(cache->buffer)); 537 cache->empty = GL_TRUE; 538 539 cache->xmin = 1000000; 540 cache->xmax = -1000000; 541 cache->ymin = 1000000; 542 cache->ymax = -1000000; 543 544 assert(!cache->texture); 545 546 /* allocate a new texture */ 547 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 548 st->bitmap.tex_format, 0, 549 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 550 1, 0, 551 PIPE_TEXTURE_USAGE_SAMPLER); 552 553 /* Map the texture surface. 554 * Subsequent glBitmap calls will write into the texture image. 555 */ 556 cache->surf = screen->get_tex_surface(screen, cache->texture, 0, 0, 0, 557 PIPE_BUFFER_USAGE_CPU_WRITE); 558 cache->buffer = screen->surface_map(screen, cache->surf, 559 PIPE_BUFFER_USAGE_CPU_WRITE); 560 561 /* init image to all 0xff */ 562 memset(cache->buffer, 0xff, BITMAP_CACHE_WIDTH * BITMAP_CACHE_HEIGHT); 563} 564 565 566/** 567 * If there's anything in the bitmap cache, draw/flush it now. 568 */ 569void 570st_flush_bitmap_cache(struct st_context *st) 571{ 572 if (!st->bitmap.cache->empty) { 573 struct bitmap_cache *cache = st->bitmap.cache; 574 575 if (st->ctx->DrawBuffer) { 576 struct pipe_context *pipe = st->pipe; 577 struct pipe_screen *screen = pipe->screen; 578 579 assert(cache->xmin <= cache->xmax); 580 /* 581 printf("flush size %d x %d at %d, %d\n", 582 cache->xmax - cache->xmin, 583 cache->ymax - cache->ymin, 584 cache->xpos, cache->ypos); 585 */ 586 587 /* The texture surface has been mapped until now. 588 * So unmap and release the texture surface before drawing. 589 */ 590 screen->surface_unmap(screen, cache->surf); 591 screen->tex_surface_release(screen, &cache->surf); 592 593 draw_bitmap_quad(st->ctx, 594 cache->xpos, 595 cache->ypos, 596 st->ctx->Current.RasterPos[2], 597 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 598 cache->texture, 599 cache->color); 600 } 601 602 /* release/free the texture */ 603 pipe_texture_reference(&cache->texture, NULL); 604 605 reset_cache(st); 606 } 607} 608 609 610/** 611 * Try to accumulate this glBitmap call in the bitmap cache. 612 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 613 */ 614static GLboolean 615accum_bitmap(struct st_context *st, 616 GLint x, GLint y, GLsizei width, GLsizei height, 617 const struct gl_pixelstore_attrib *unpack, 618 const GLubyte *bitmap ) 619{ 620 struct bitmap_cache *cache = st->bitmap.cache; 621 int px = -999, py; 622 623 if (width > BITMAP_CACHE_WIDTH || 624 height > BITMAP_CACHE_HEIGHT) 625 return GL_FALSE; /* too big to cache */ 626 627 if (!cache->empty) { 628 px = x - cache->xpos; /* pos in buffer */ 629 py = y - cache->ypos; 630 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 631 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 632 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color)) { 633 /* This bitmap would extend beyond cache bounds, or the bitmap 634 * color is changing 635 * so flush and continue. 636 */ 637 st_flush_bitmap_cache(st); 638 } 639 } 640 641 if (cache->empty) { 642 /* Initialize. Center bitmap vertically in the buffer. */ 643 px = 0; 644 py = (BITMAP_CACHE_HEIGHT - height) / 2; 645 cache->xpos = x; 646 cache->ypos = y - py; 647 cache->empty = GL_FALSE; 648 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 649 } 650 651 assert(px != -999); 652 653 if (x < cache->xmin) 654 cache->xmin = x; 655 if (y < cache->ymin) 656 cache->ymin = y; 657 if (x + width > cache->xmax) 658 cache->xmax = x + width; 659 if (y + height > cache->ymax) 660 cache->ymax = y + height; 661 662 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 663 cache->buffer, BITMAP_CACHE_WIDTH); 664 665 return GL_TRUE; /* accumulated */ 666} 667 668 669 670/** 671 * Called via ctx->Driver.Bitmap() 672 */ 673static void 674st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 675 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 676{ 677 struct st_context *st = ctx->st; 678 struct pipe_texture *pt; 679 680 if (width == 0 || height == 0) 681 return; 682 683 st_validate_state(st); 684 685 if (!st->bitmap.vs) { 686 /* create pass-through vertex shader now */ 687 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 688 TGSI_SEMANTIC_COLOR, 689 TGSI_SEMANTIC_GENERIC }; 690 const uint semantic_indexes[] = { 0, 0, 0 }; 691 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 692 semantic_names, 693 semantic_indexes, 694 &st->bitmap.vert_shader); 695 } 696 697 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 698 return; 699 700 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 701 if (pt) { 702 assert(pt->target == PIPE_TEXTURE_2D); 703 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 704 width, height, pt, 705 st->ctx->Current.RasterColor); 706 /* release/free the texture */ 707 pipe_texture_reference(&pt, NULL); 708 } 709} 710 711 712/** Per-context init */ 713void 714st_init_bitmap_functions(struct dd_function_table *functions) 715{ 716 functions->Bitmap = st_Bitmap; 717} 718 719 720/** Per-context init */ 721void 722st_init_bitmap(struct st_context *st) 723{ 724 struct pipe_sampler_state *sampler = &st->bitmap.sampler; 725 struct pipe_context *pipe = st->pipe; 726 struct pipe_screen *screen = pipe->screen; 727 728 /* init sampler state once */ 729 memset(sampler, 0, sizeof(*sampler)); 730 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 731 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 732 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 733 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 734 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 735 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 736 sampler->normalized_coords = 1; 737 738 /* init baseline rasterizer state once */ 739 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 740 st->bitmap.rasterizer.gl_rasterization_rules = 1; 741 st->bitmap.rasterizer.bypass_vs = 1; 742 743 /* find a usable texture format */ 744 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE)) { 745 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 746 } 747 else { 748 /* XXX support more formats */ 749 assert(0); 750 } 751 752 /* alloc bitmap cache object */ 753 st->bitmap.cache = CALLOC_STRUCT(bitmap_cache); 754 755 reset_cache(st); 756} 757 758 759/** Per-context tear-down */ 760void 761st_destroy_bitmap(struct st_context *st) 762{ 763 struct pipe_context *pipe = st->pipe; 764 struct pipe_screen *screen = pipe->screen; 765 struct bitmap_cache *cache = st->bitmap.cache; 766 767 screen->surface_unmap(screen, cache->surf); 768 screen->tex_surface_release(screen, &cache->surf); 769 770 if (st->bitmap.vs) { 771 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 772 st->bitmap.vs = NULL; 773 } 774 775 if (st->bitmap.vbuf) { 776 pipe_buffer_destroy(pipe, st->bitmap.vbuf); 777 st->bitmap.vbuf = NULL; 778 } 779 780 if (st->bitmap.cache) { 781 pipe_texture_release(&st->bitmap.cache->texture); 782 FREE(st->bitmap.cache); 783 st->bitmap.cache = NULL; 784 } 785} 786