st_cb_bitmap.c revision 6fb40092261b891b78e504f453fddf041f9efac6
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 "pipe/p_winsys.h" 54#include "util/p_tile.h" 55#include "util/u_draw_quad.h" 56#include "util/u_simple_shaders.h" 57#include "shader/prog_instruction.h" 58#include "cso_cache/cso_context.h" 59 60 61 62/** 63 * glBitmaps are drawn as textured quads. The user's bitmap pattern 64 * is stored in a texture image. An alpha8 texture format is used. 65 * The fragment shader samples a bit (texel) from the texture, then 66 * discards the fragment if the bit is off. 67 * 68 * Note that we actually store the inverse image of the bitmap to 69 * simplify the fragment program. An "on" bit gets stored as texel=0x0 70 * and an "off" bit is stored as texel=0xff. Then we kill the 71 * fragment if the negated texel value is less than zero. 72 */ 73 74 75/** 76 * The bitmap cache attempts to accumulate multiple glBitmap calls in a 77 * buffer which is then rendered en mass upon a flush, state change, etc. 78 * A wide, short buffer is used to target the common case of a series 79 * of glBitmap calls being used to draw text. 80 */ 81static GLboolean UseBitmapCache = GL_TRUE; 82 83 84#define BITMAP_CACHE_WIDTH 512 85#define BITMAP_CACHE_HEIGHT 32 86 87struct bitmap_cache 88{ 89 /** Window pos to render the cached image */ 90 GLint xpos, ypos; 91 /** Bounds of region used in window coords */ 92 GLint xmin, ymin, xmax, ymax; 93 struct pipe_texture *texture; 94 GLboolean empty; 95 /** An I8 texture image: */ 96 GLubyte buffer[BITMAP_CACHE_HEIGHT][BITMAP_CACHE_WIDTH]; 97}; 98 99 100 101 102/** 103 * Make fragment program for glBitmap: 104 * Sample the texture and kill the fragment if the bit is 0. 105 * This program will be combined with the user's fragment program. 106 */ 107static struct st_fragment_program * 108make_bitmap_fragment_program(GLcontext *ctx, GLuint samplerIndex) 109{ 110 struct st_fragment_program *stfp; 111 struct gl_program *p; 112 GLuint ic = 0; 113 114 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 115 if (!p) 116 return NULL; 117 118 p->NumInstructions = 3; 119 120 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 121 if (!p->Instructions) { 122 ctx->Driver.DeleteProgram(ctx, p); 123 return NULL; 124 } 125 _mesa_init_instructions(p->Instructions, p->NumInstructions); 126 127 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 128 p->Instructions[ic].Opcode = OPCODE_TEX; 129 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 130 p->Instructions[ic].DstReg.Index = 0; 131 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 132 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 133 p->Instructions[ic].TexSrcUnit = samplerIndex; 134 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 135 ic++; 136 137 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 138 p->Instructions[ic].Opcode = OPCODE_KIL; 139 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 140 p->Instructions[ic].SrcReg[0].Index = 0; 141 p->Instructions[ic].SrcReg[0].NegateBase = NEGATE_XYZW; 142 ic++; 143 144 /* END; */ 145 p->Instructions[ic++].Opcode = OPCODE_END; 146 147 assert(ic == p->NumInstructions); 148 149 p->InputsRead = FRAG_BIT_TEX0; 150 p->OutputsWritten = 0x0; 151 p->SamplersUsed = (1 << samplerIndex); 152 153 stfp = (struct st_fragment_program *) p; 154 stfp->Base.UsesKill = GL_TRUE; 155 st_translate_fragment_program(ctx->st, stfp, NULL); 156 157 return stfp; 158} 159 160 161static int 162find_free_bit(uint bitfield) 163{ 164 int i; 165 for (i = 0; i < 32; i++) { 166 if ((bitfield & (1 << i)) == 0) { 167 return i; 168 } 169 } 170 return -1; 171} 172 173 174/** 175 * Combine basic bitmap fragment program with the user-defined program. 176 */ 177static struct st_fragment_program * 178combined_bitmap_fragment_program(GLcontext *ctx) 179{ 180 struct st_context *st = ctx->st; 181 struct st_fragment_program *stfp = st->fp; 182 183 if (!stfp->bitmap_program) { 184 /* 185 * Generate new program which is the user-defined program prefixed 186 * with the bitmap sampler/kill instructions. 187 */ 188 struct st_fragment_program *bitmap_prog; 189 uint sampler; 190 191 sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); 192 bitmap_prog = make_bitmap_fragment_program(ctx, sampler); 193 194 stfp->bitmap_program = (struct st_fragment_program *) 195 _mesa_combine_programs(ctx, 196 &bitmap_prog->Base.Base, &stfp->Base.Base); 197 stfp->bitmap_program->bitmap_sampler = sampler; 198#if 0 199 { 200 struct gl_program *p = &stfp->bitmap_program->Base.Base; 201 printf("Combined bitmap program:\n"); 202 _mesa_print_program(p); 203 printf("InputsRead: 0x%x\n", p->InputsRead); 204 printf("OutputsWritten: 0x%x\n", p->OutputsWritten); 205 _mesa_print_parameter_list(p->Parameters); 206 } 207#endif 208 209 /* translate to TGSI tokens */ 210 st_translate_fragment_program(st, stfp->bitmap_program, NULL); 211 } 212 213 /* Ideally we'd have updated the pipe constants during the normal 214 * st/atom mechanism. But we can't since this is specific to glBitmap. 215 */ 216 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 217 218 return stfp->bitmap_program; 219} 220 221 222/** 223 * Create a texture which represents a bitmap image. 224 */ 225static struct pipe_texture * 226make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, 227 const struct gl_pixelstore_attrib *unpack, 228 const GLubyte *bitmap) 229{ 230 struct pipe_context *pipe = ctx->st->pipe; 231 struct pipe_screen *screen = pipe->screen; 232 struct pipe_surface *surface; 233 uint format = 0, cpp, comp; 234 ubyte *dest; 235 struct pipe_texture *pt; 236 int row, col; 237 238 /* find a texture format we know */ 239 if (screen->is_format_supported( screen, PIPE_FORMAT_U_I8, PIPE_TEXTURE )) { 240 format = PIPE_FORMAT_U_I8; 241 cpp = 1; 242 comp = 0; 243 } 244 else if (screen->is_format_supported( screen, PIPE_FORMAT_A8R8G8B8_UNORM, PIPE_TEXTURE )) { 245 format = PIPE_FORMAT_A8R8G8B8_UNORM; 246 cpp = 4; 247 comp = 3; /* alpha channel */ /*XXX little-endian dependency */ 248 } 249 else { 250 /* XXX support more formats */ 251 assert( 0 ); 252 } 253 254 /* PBO source... */ 255 bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); 256 if (!bitmap) { 257 return NULL; 258 } 259 260 /** 261 * Create texture to hold bitmap pattern. 262 */ 263 pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, format, 0, width, height, 264 1, 0); 265 if (!pt) { 266 _mesa_unmap_bitmap_pbo(ctx, unpack); 267 return NULL; 268 } 269 270 surface = screen->get_tex_surface(screen, pt, 0, 0, 0); 271 272 /* map texture surface */ 273 dest = pipe_surface_map(surface); 274 275 /* Put image into texture surface. 276 * Note that the image is actually going to be upside down in 277 * the texture. We deal with that with texcoords. 278 */ 279 280 for (row = 0; row < height; row++) { 281 const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, 282 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); 283 ubyte *destRow = dest + row * surface->pitch * cpp; 284 285 if (unpack->LsbFirst) { 286 /* Lsb first */ 287 GLubyte mask = 1U << (unpack->SkipPixels & 0x7); 288 for (col = 0; col < width; col++) { 289 290 /* set texel to 255 if bit is set */ 291 destRow[comp] = (*src & mask) ? 0x0 : 0xff; 292 destRow += cpp; 293 294 if (mask == 128U) { 295 src++; 296 mask = 1U; 297 } 298 else { 299 mask = mask << 1; 300 } 301 } 302 303 /* get ready for next row */ 304 if (mask != 1) 305 src++; 306 } 307 else { 308 /* Msb first */ 309 GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); 310 for (col = 0; col < width; col++) { 311 312 /* set texel to 255 if bit is set */ 313 destRow[comp] =(*src & mask) ? 0x0 : 0xff; 314 destRow += cpp; 315 316 if (mask == 1U) { 317 src++; 318 mask = 128U; 319 } 320 else { 321 mask = mask >> 1; 322 } 323 } 324 325 /* get ready for next row */ 326 if (mask != 128) 327 src++; 328 } 329 330 } /* row */ 331 332 _mesa_unmap_bitmap_pbo(ctx, unpack); 333 334 /* Release surface */ 335 pipe_surface_unmap(surface); 336 pipe_surface_reference(&surface, NULL); 337 pipe->texture_update(pipe, pt, 0, 0x1); 338 339 pt->format = format; 340 341 return pt; 342} 343 344 345static void 346setup_bitmap_vertex_data(struct st_context *st, 347 int x, int y, int width, int height, 348 float z, const float color[4]) 349{ 350 struct pipe_context *pipe = st->pipe; 351 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 352 const GLfloat fb_width = fb->Width; 353 const GLfloat fb_height = fb->Height; 354 const GLfloat x0 = x; 355 const GLfloat x1 = x + width; 356 const GLfloat y0 = y; 357 const GLfloat y1 = y + height; 358 const GLfloat sLeft = 0.0F, sRight = 1.0F; 359 const GLfloat tTop = 0.0, tBot = 1.0 - tTop; 360 const GLfloat clip_x0 = x0 / fb_width * 2.0 - 1.0; 361 const GLfloat clip_y0 = y0 / fb_height * 2.0 - 1.0; 362 const GLfloat clip_x1 = x1 / fb_width * 2.0 - 1.0; 363 const GLfloat clip_y1 = y1 / fb_height * 2.0 - 1.0; 364 GLuint i; 365 void *buf; 366 367 if (!st->bitmap.vbuf) { 368 st->bitmap.vbuf = pipe->winsys->buffer_create(pipe->winsys, 32, 369 PIPE_BUFFER_USAGE_VERTEX, 370 sizeof(st->bitmap.vertices)); 371 } 372 373 /* Positions are in clip coords since we need to do clipping in case 374 * the bitmap quad goes beyond the window bounds. 375 */ 376 st->bitmap.vertices[0][0][0] = clip_x0; 377 st->bitmap.vertices[0][0][1] = clip_y0; 378 st->bitmap.vertices[0][2][0] = sLeft; 379 st->bitmap.vertices[0][2][1] = tTop; 380 381 st->bitmap.vertices[1][0][0] = clip_x1; 382 st->bitmap.vertices[1][0][1] = clip_y0; 383 st->bitmap.vertices[1][2][0] = sRight; 384 st->bitmap.vertices[1][2][1] = tTop; 385 386 st->bitmap.vertices[2][0][0] = clip_x1; 387 st->bitmap.vertices[2][0][1] = clip_y1; 388 st->bitmap.vertices[2][2][0] = sRight; 389 st->bitmap.vertices[2][2][1] = tBot; 390 391 st->bitmap.vertices[3][0][0] = clip_x0; 392 st->bitmap.vertices[3][0][1] = clip_y1; 393 st->bitmap.vertices[3][2][0] = sLeft; 394 st->bitmap.vertices[3][2][1] = tBot; 395 396 /* same for all verts: */ 397 for (i = 0; i < 4; i++) { 398 st->bitmap.vertices[i][0][2] = z; 399 st->bitmap.vertices[i][0][3] = 1.0; 400 st->bitmap.vertices[i][1][0] = color[0]; 401 st->bitmap.vertices[i][1][1] = color[1]; 402 st->bitmap.vertices[i][1][2] = color[2]; 403 st->bitmap.vertices[i][1][3] = color[3]; 404 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 405 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 406 } 407 408 /* put vertex data into vbuf */ 409 buf = pipe->winsys->buffer_map(pipe->winsys, st->bitmap.vbuf, 410 PIPE_BUFFER_USAGE_CPU_WRITE); 411 memcpy(buf, st->bitmap.vertices, sizeof(st->bitmap.vertices)); 412 pipe->winsys->buffer_unmap(pipe->winsys, st->bitmap.vbuf); 413} 414 415 416 417/** 418 * Render a glBitmap by drawing a textured quad 419 */ 420static void 421draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, 422 GLsizei width, GLsizei height, 423 struct pipe_texture *pt) 424{ 425 struct st_context *st = ctx->st; 426 struct pipe_context *pipe = ctx->st->pipe; 427 struct cso_context *cso = ctx->st->cso_context; 428 struct st_fragment_program *stfp; 429 GLuint maxSize; 430 431 stfp = combined_bitmap_fragment_program(ctx); 432 433 /* limit checks */ 434 /* XXX if the bitmap is larger than the max texture size, break 435 * it up into chunks. 436 */ 437 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 438 assert(width <= maxSize); 439 assert(height <= maxSize); 440 441 cso_save_rasterizer(cso); 442 cso_save_samplers(cso); 443 cso_save_sampler_textures(cso); 444 cso_save_viewport(cso); 445 cso_save_fragment_shader(cso); 446 cso_save_vertex_shader(cso); 447 448 /* rasterizer state: just scissor */ 449 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 450 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 451 452 /* fragment shader state: TEX lookup program */ 453 cso_set_fragment_shader_handle(cso, stfp->driver_shader); 454 455 /* vertex shader state: position + texcoord pass-through */ 456 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 457 458 /* user samplers, plus our bitmap sampler */ 459 { 460 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 461 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); 462 uint i; 463 for (i = 0; i < st->state.num_samplers; i++) { 464 samplers[i] = &st->state.samplers[i]; 465 } 466 samplers[stfp->bitmap_sampler] = &st->bitmap.sampler; 467 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); } 468 469 /* user textures, plus the bitmap texture */ 470 { 471 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 472 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 473 memcpy(textures, st->state.sampler_texture, sizeof(textures)); 474 textures[stfp->bitmap_sampler] = pt; 475 cso_set_sampler_textures(cso, num, textures); 476 } 477 478 /* viewport state: viewport matching window dims */ 479 { 480 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 481 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 482 const float width = fb->Width; 483 const float height = fb->Height; 484 struct pipe_viewport_state vp; 485 vp.scale[0] = 0.5 * width; 486 vp.scale[1] = height * (invert ? -0.5 : 0.5); 487 vp.scale[2] = 1.0; 488 vp.scale[3] = 1.0; 489 vp.translate[0] = 0.5 * width; 490 vp.translate[1] = 0.5 * height; 491 vp.translate[2] = 0.0; 492 vp.translate[3] = 0.0; 493 cso_set_viewport(cso, &vp); 494 } 495 496 /* draw textured quad */ 497 setup_bitmap_vertex_data(st, x, y, width, height, 498 ctx->Current.RasterPos[2], 499 ctx->Current.RasterColor); 500 501 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, 502 PIPE_PRIM_TRIANGLE_FAN, 503 4, /* verts */ 504 3); /* attribs/vert */ 505 506 507 /* restore state */ 508 cso_restore_rasterizer(cso); 509 cso_restore_samplers(cso); 510 cso_restore_sampler_textures(cso); 511 cso_restore_viewport(cso); 512 cso_restore_fragment_shader(cso); 513 cso_restore_vertex_shader(cso); 514} 515 516 517static void 518reset_cache(struct st_context *st) 519{ 520 memset(st->bitmap.cache->buffer, 0xff, sizeof(st->bitmap.cache->buffer)); 521 st->bitmap.cache->empty = GL_TRUE; 522 523 st->bitmap.cache->xmin = 1000000; 524 st->bitmap.cache->xmax = -1000000; 525 st->bitmap.cache->ymin = 1000000; 526 st->bitmap.cache->ymax = -1000000; 527} 528 529 530static void 531init_bitmap_cache(struct st_context *st) 532{ 533 struct pipe_context *pipe = st->pipe; 534 struct pipe_screen *screen = pipe->screen; 535 enum pipe_format format; 536 537 st->bitmap.cache = CALLOC_STRUCT(bitmap_cache); 538 if (!st->bitmap.cache) 539 return; 540 541 /* find a usable texture format */ 542 if (screen->is_format_supported(screen, PIPE_FORMAT_U_I8, PIPE_TEXTURE)) { 543 format = PIPE_FORMAT_U_I8; 544 } 545 else { 546 /* XXX support more formats */ 547 assert(0); 548 } 549 550 st->bitmap.cache->texture 551 = st_texture_create(st, PIPE_TEXTURE_2D, format, 0, 552 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 1, 0); 553 if (!st->bitmap.cache->texture) { 554 FREE(st->bitmap.cache); 555 st->bitmap.cache = NULL; 556 return; 557 } 558 559 reset_cache(st); 560} 561 562 563/** 564 * If there's anything in the bitmap cache, draw/flush it now. 565 */ 566void 567st_flush_bitmap_cache(struct st_context *st) 568{ 569 if (!st->bitmap.cache->empty) { 570 if (st->ctx->DrawBuffer) { 571 struct bitmap_cache *cache = st->bitmap.cache; 572 struct pipe_context *pipe = st->pipe; 573 struct pipe_screen *screen = pipe->screen; 574 struct pipe_surface *surf; 575 void *dest; 576 577 assert(cache->xmin <= cache->xmax); 578 /* 579 printf("flush size %d x %d at %d, %d\n", 580 cache->xmax - cache->xmin, 581 cache->ymax - cache->ymin, 582 cache->xpos, cache->ypos); 583 */ 584 585 /* update the texture map image */ 586 surf = screen->get_tex_surface(screen, cache->texture, 0, 0, 0); 587 dest = pipe_surface_map(surf); 588 memcpy(dest, cache->buffer, sizeof(cache->buffer)); 589 pipe_surface_unmap(surf); 590 pipe_surface_reference(&surf, NULL); 591 592 /* flush in case the previous texture contents haven't been 593 * used yet. XXX this is not ideal! Revisit. 594 */ 595 st->pipe->flush( st->pipe, 0x0, NULL ); 596 597 pipe->texture_update(pipe, cache->texture, 0, 0x1); 598 599 draw_bitmap_quad(st->ctx, 600 cache->xpos, 601 cache->ypos, 602 st->ctx->Current.RasterPos[2], 603 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 604 cache->texture); 605 } 606 reset_cache(st); 607 } 608} 609 610 611/** 612 * Try to accumulate this glBitmap call in the bitmap cache. 613 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 614 */ 615static GLboolean 616accum_bitmap(struct st_context *st, 617 GLint x, GLint y, GLsizei width, GLsizei height, 618 const struct gl_pixelstore_attrib *unpack, 619 const GLubyte *bitmap ) 620{ 621 struct bitmap_cache *cache = st->bitmap.cache; 622 int row, col; 623 int px = -999, py; 624 625 if (width > BITMAP_CACHE_WIDTH || 626 height > BITMAP_CACHE_HEIGHT) 627 return GL_FALSE; /* too big to cache */ 628 629 if (!cache->empty) { 630 px = x - cache->xpos; /* pos in buffer */ 631 py = y - cache->ypos; 632 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 633 py < 0 || py + height > BITMAP_CACHE_HEIGHT) { 634 /* This bitmap would extend beyond cache bounds, 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 } 649 650 assert(px != -999); 651 652 if (x < cache->xmin) 653 cache->xmin = x; 654 if (y < cache->ymin) 655 cache->ymin = y; 656 if (x + width > cache->xmax) 657 cache->xmax = x + width; 658 if (y + height > cache->ymax) 659 cache->ymax = y + height; 660 661 /* XXX try to combine this code with code in make_bitmap_texture() */ 662#define SET_PIXEL(COL, ROW) \ 663 cache->buffer[py + (ROW)][px + (COL)] = 0x0; 664 665 for (row = 0; row < height; row++) { 666 const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, 667 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); 668 669 if (unpack->LsbFirst) { 670 /* Lsb first */ 671 GLubyte mask = 1U << (unpack->SkipPixels & 0x7); 672 for (col = 0; col < width; col++) { 673 674 if (*src & mask) { 675 SET_PIXEL(col, row); 676 } 677 678 if (mask == 128U) { 679 src++; 680 mask = 1U; 681 } 682 else { 683 mask = mask << 1; 684 } 685 } 686 687 /* get ready for next row */ 688 if (mask != 1) 689 src++; 690 } 691 else { 692 /* Msb first */ 693 GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); 694 for (col = 0; col < width; col++) { 695 696 if (*src & mask) { 697 SET_PIXEL(col, row); 698 } 699 700 if (mask == 1U) { 701 src++; 702 mask = 128U; 703 } 704 else { 705 mask = mask >> 1; 706 } 707 } 708 709 /* get ready for next row */ 710 if (mask != 128) 711 src++; 712 } 713 714 } /* row */ 715 716 return GL_TRUE; /* accumulated */ 717} 718 719 720 721/** 722 * Called via ctx->Driver.Bitmap() 723 */ 724static void 725st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 726 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 727{ 728 struct st_context *st = ctx->st; 729 struct pipe_texture *pt; 730 731 st_validate_state(st); 732 733 if (!st->bitmap.vs) { 734 /* create pass-through vertex shader now */ 735 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 736 TGSI_SEMANTIC_COLOR, 737 TGSI_SEMANTIC_GENERIC }; 738 const uint semantic_indexes[] = { 0, 0, 0 }; 739 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 740 semantic_names, 741 semantic_indexes, 742 &st->bitmap.vert_shader); 743 } 744 745 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 746 return; 747 748 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 749 if (pt) { 750 assert(pt->target == PIPE_TEXTURE_2D); 751 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 752 width, height, pt); 753 pipe_texture_reference(&pt, NULL); 754 } 755} 756 757 758/** Per-context init */ 759void 760st_init_bitmap_functions(struct dd_function_table *functions) 761{ 762 functions->Bitmap = st_Bitmap; 763} 764 765 766/** Per-context init */ 767void 768st_init_bitmap(struct st_context *st) 769{ 770 struct pipe_sampler_state *sampler = &st->bitmap.sampler; 771 772 /* init sampler state once */ 773 memset(sampler, 0, sizeof(*sampler)); 774 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 775 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 776 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 777 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 778 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 779 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 780 sampler->normalized_coords = 1; 781 782 /* init baseline rasterizer state once */ 783 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 784 st->bitmap.rasterizer.gl_rasterization_rules = 1; 785 st->bitmap.rasterizer.bypass_vs = 1; 786 787 init_bitmap_cache(st); 788} 789 790 791/** Per-context tear-down */ 792void 793st_destroy_bitmap(struct st_context *st) 794{ 795 struct pipe_context *pipe = st->pipe; 796 797#if 0 798 if (st->bitmap.combined_prog) { 799 st_delete_program(st->ctx, &st->bitmap.combined_prog->Base.Base); 800 } 801 802 if (st->bitmap.program) { 803 st_delete_program(st->ctx, &st->bitmap.program->Base.Base); 804 } 805#endif 806 if (st->bitmap.vs) { 807 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 808 st->bitmap.vs = NULL; 809 } 810 811 if (st->bitmap.vbuf) { 812 pipe->winsys->buffer_destroy(pipe->winsys, st->bitmap.vbuf); 813 st->bitmap.vbuf = NULL; 814 } 815 816 if (st->bitmap.cache) { 817 pipe_texture_release(&st->bitmap.cache->texture); 818 FREE(st->bitmap.cache); 819 st->bitmap.cache = NULL; 820 } 821} 822