st_cb_bitmap.c revision 4c7001462607e6e99e474d6271dd481d3f8f201c
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 "program/program.h" 38#include "program/prog_print.h" 39 40#include "st_context.h" 41#include "st_atom.h" 42#include "st_atom_constbuf.h" 43#include "st_program.h" 44#include "st_cb_bitmap.h" 45#include "st_texture.h" 46 47#include "pipe/p_context.h" 48#include "pipe/p_defines.h" 49#include "pipe/p_shader_tokens.h" 50#include "util/u_inlines.h" 51#include "util/u_draw_quad.h" 52#include "util/u_simple_shaders.h" 53#include "program/prog_instruction.h" 54#include "cso_cache/cso_context.h" 55 56 57#if FEATURE_drawpix 58 59/** 60 * glBitmaps are drawn as textured quads. The user's bitmap pattern 61 * is stored in a texture image. An alpha8 texture format is used. 62 * The fragment shader samples a bit (texel) from the texture, then 63 * discards the fragment if the bit is off. 64 * 65 * Note that we actually store the inverse image of the bitmap to 66 * simplify the fragment program. An "on" bit gets stored as texel=0x0 67 * and an "off" bit is stored as texel=0xff. Then we kill the 68 * fragment if the negated texel value is less than zero. 69 */ 70 71 72/** 73 * The bitmap cache attempts to accumulate multiple glBitmap calls in a 74 * buffer which is then rendered en mass upon a flush, state change, etc. 75 * A wide, short buffer is used to target the common case of a series 76 * of glBitmap calls being used to draw text. 77 */ 78static GLboolean UseBitmapCache = GL_TRUE; 79 80 81#define BITMAP_CACHE_WIDTH 512 82#define BITMAP_CACHE_HEIGHT 32 83 84struct bitmap_cache 85{ 86 /** Window pos to render the cached image */ 87 GLint xpos, ypos; 88 /** Bounds of region used in window coords */ 89 GLint xmin, ymin, xmax, ymax; 90 91 GLfloat color[4]; 92 93 /** Bitmap's Z position */ 94 GLfloat zpos; 95 96 struct pipe_resource *texture; 97 struct pipe_transfer *trans; 98 99 GLboolean empty; 100 101 /** An I8 texture image: */ 102 ubyte *buffer; 103}; 104 105 106/** Epsilon for Z comparisons */ 107#define Z_EPSILON 1e-06 108 109 110/** 111 * Make fragment program for glBitmap: 112 * Sample the texture and kill the fragment if the bit is 0. 113 * This program will be combined with the user's fragment program. 114 */ 115static struct st_fragment_program * 116make_bitmap_fragment_program(struct gl_context *ctx, GLuint samplerIndex) 117{ 118 struct st_context *st = st_context(ctx); 119 struct st_fragment_program *stfp; 120 struct gl_program *p; 121 GLuint ic = 0; 122 123 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 124 if (!p) 125 return NULL; 126 127 p->NumInstructions = 3; 128 129 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 130 if (!p->Instructions) { 131 ctx->Driver.DeleteProgram(ctx, p); 132 return NULL; 133 } 134 _mesa_init_instructions(p->Instructions, p->NumInstructions); 135 136 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 137 p->Instructions[ic].Opcode = OPCODE_TEX; 138 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 139 p->Instructions[ic].DstReg.Index = 0; 140 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 141 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 142 p->Instructions[ic].TexSrcUnit = samplerIndex; 143 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 144 ic++; 145 146 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 147 p->Instructions[ic].Opcode = OPCODE_KIL; 148 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 149 150 if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM) 151 p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_XXXX; 152 153 p->Instructions[ic].SrcReg[0].Index = 0; 154 p->Instructions[ic].SrcReg[0].Negate = NEGATE_XYZW; 155 ic++; 156 157 /* END; */ 158 p->Instructions[ic++].Opcode = OPCODE_END; 159 160 assert(ic == p->NumInstructions); 161 162 p->InputsRead = FRAG_BIT_TEX0; 163 p->OutputsWritten = 0x0; 164 p->SamplersUsed = (1 << samplerIndex); 165 166 stfp = (struct st_fragment_program *) p; 167 stfp->Base.UsesKill = GL_TRUE; 168 169 return stfp; 170} 171 172 173static int 174find_free_bit(uint bitfield) 175{ 176 int i; 177 for (i = 0; i < 32; i++) { 178 if ((bitfield & (1 << i)) == 0) { 179 return i; 180 } 181 } 182 return -1; 183} 184 185 186/** 187 * Combine basic bitmap fragment program with the user-defined program. 188 */ 189static struct st_fragment_program * 190combined_bitmap_fragment_program(struct gl_context *ctx) 191{ 192 struct st_context *st = st_context(ctx); 193 struct st_fragment_program *stfp = st->fp; 194 195 if (!stfp->bitmap_program) { 196 /* 197 * Generate new program which is the user-defined program prefixed 198 * with the bitmap sampler/kill instructions. 199 */ 200 struct st_fragment_program *bitmap_prog; 201 uint sampler; 202 203 sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); 204 bitmap_prog = make_bitmap_fragment_program(ctx, sampler); 205 206 stfp->bitmap_program = (struct st_fragment_program *) 207 _mesa_combine_programs(ctx, 208 &bitmap_prog->Base.Base, &stfp->Base.Base); 209 stfp->bitmap_program->bitmap_sampler = sampler; 210 211 /* done with this after combining */ 212 st_reference_fragprog(st, &bitmap_prog, NULL); 213 214#if 0 215 { 216 struct gl_program *p = &stfp->bitmap_program->Base.Base; 217 printf("Combined bitmap program:\n"); 218 _mesa_print_program(p); 219 printf("InputsRead: 0x%x\n", p->InputsRead); 220 printf("OutputsWritten: 0x%x\n", p->OutputsWritten); 221 _mesa_print_parameter_list(p->Parameters); 222 } 223#endif 224 225 /* translate to TGSI tokens */ 226 st_translate_fragment_program(st, stfp->bitmap_program); 227 } 228 229 return stfp->bitmap_program; 230} 231 232 233/** 234 * Copy user-provide bitmap bits into texture buffer, expanding 235 * bits into texels. 236 * "On" bits will set texels to 0x0. 237 * "Off" bits will not modify texels. 238 * Note that the image is actually going to be upside down in 239 * the texture. We deal with that with texcoords. 240 */ 241static void 242unpack_bitmap(struct st_context *st, 243 GLint px, GLint py, GLsizei width, GLsizei height, 244 const struct gl_pixelstore_attrib *unpack, 245 const GLubyte *bitmap, 246 ubyte *destBuffer, uint destStride) 247{ 248 destBuffer += py * destStride + px; 249 250 _mesa_expand_bitmap(width, height, unpack, bitmap, 251 destBuffer, destStride, 0x0); 252} 253 254 255/** 256 * Create a texture which represents a bitmap image. 257 */ 258static struct pipe_resource * 259make_bitmap_texture(struct gl_context *ctx, GLsizei width, GLsizei height, 260 const struct gl_pixelstore_attrib *unpack, 261 const GLubyte *bitmap) 262{ 263 struct st_context *st = st_context(ctx); 264 struct pipe_context *pipe = st->pipe; 265 struct pipe_transfer *transfer; 266 ubyte *dest; 267 struct pipe_resource *pt; 268 269 /* PBO source... */ 270 bitmap = _mesa_map_pbo_source(ctx, unpack, bitmap); 271 if (!bitmap) { 272 return NULL; 273 } 274 275 /** 276 * Create texture to hold bitmap pattern. 277 */ 278 pt = st_texture_create(st, st->internal_target, st->bitmap.tex_format, 279 0, width, height, 1, 280 PIPE_BIND_SAMPLER_VIEW); 281 if (!pt) { 282 _mesa_unmap_pbo_source(ctx, unpack); 283 return NULL; 284 } 285 286 transfer = pipe_get_transfer(st->pipe, pt, 0, 0, 287 PIPE_TRANSFER_WRITE, 288 0, 0, width, height); 289 290 dest = pipe_transfer_map(pipe, transfer); 291 292 /* Put image into texture transfer */ 293 memset(dest, 0xff, height * transfer->stride); 294 unpack_bitmap(st, 0, 0, width, height, unpack, bitmap, 295 dest, transfer->stride); 296 297 _mesa_unmap_pbo_source(ctx, unpack); 298 299 /* Release transfer */ 300 pipe_transfer_unmap(pipe, transfer); 301 pipe->transfer_destroy(pipe, transfer); 302 303 return pt; 304} 305 306static GLuint 307setup_bitmap_vertex_data(struct st_context *st, bool normalized, 308 int x, int y, int width, int height, 309 float z, const float color[4]) 310{ 311 struct pipe_context *pipe = st->pipe; 312 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 313 const GLfloat fb_width = (GLfloat)fb->Width; 314 const GLfloat fb_height = (GLfloat)fb->Height; 315 const GLfloat x0 = (GLfloat)x; 316 const GLfloat x1 = (GLfloat)(x + width); 317 const GLfloat y0 = (GLfloat)y; 318 const GLfloat y1 = (GLfloat)(y + height); 319 GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 320 GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop; 321 const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); 322 const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); 323 const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); 324 const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); 325 const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ 326 GLuint i; 327 328 if(!normalized) 329 { 330 sRight = width; 331 tBot = height; 332 } 333 334 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as 335 * no_flush) updates to buffers where we know there is no conflict 336 * with previous data. Currently using max_slots > 1 will cause 337 * synchronous rendering if the driver flushes its command buffers 338 * between one bitmap and the next. Our flush hook below isn't 339 * sufficient to catch this as the driver doesn't tell us when it 340 * flushes its own command buffers. Until this gets fixed, pay the 341 * price of allocating a new buffer for each bitmap cache-flush to 342 * avoid synchronous rendering. 343 */ 344 if (st->bitmap.vbuf_slot >= max_slots) { 345 pipe_resource_reference(&st->bitmap.vbuf, NULL); 346 st->bitmap.vbuf_slot = 0; 347 } 348 349 if (!st->bitmap.vbuf) { 350 st->bitmap.vbuf = pipe_buffer_create(pipe->screen, 351 PIPE_BIND_VERTEX_BUFFER, 352 max_slots * sizeof(st->bitmap.vertices)); 353 } 354 355 /* Positions are in clip coords since we need to do clipping in case 356 * the bitmap quad goes beyond the window bounds. 357 */ 358 st->bitmap.vertices[0][0][0] = clip_x0; 359 st->bitmap.vertices[0][0][1] = clip_y0; 360 st->bitmap.vertices[0][2][0] = sLeft; 361 st->bitmap.vertices[0][2][1] = tTop; 362 363 st->bitmap.vertices[1][0][0] = clip_x1; 364 st->bitmap.vertices[1][0][1] = clip_y0; 365 st->bitmap.vertices[1][2][0] = sRight; 366 st->bitmap.vertices[1][2][1] = tTop; 367 368 st->bitmap.vertices[2][0][0] = clip_x1; 369 st->bitmap.vertices[2][0][1] = clip_y1; 370 st->bitmap.vertices[2][2][0] = sRight; 371 st->bitmap.vertices[2][2][1] = tBot; 372 373 st->bitmap.vertices[3][0][0] = clip_x0; 374 st->bitmap.vertices[3][0][1] = clip_y1; 375 st->bitmap.vertices[3][2][0] = sLeft; 376 st->bitmap.vertices[3][2][1] = tBot; 377 378 /* same for all verts: */ 379 for (i = 0; i < 4; i++) { 380 st->bitmap.vertices[i][0][2] = z; 381 st->bitmap.vertices[i][0][3] = 1.0; 382 st->bitmap.vertices[i][1][0] = color[0]; 383 st->bitmap.vertices[i][1][1] = color[1]; 384 st->bitmap.vertices[i][1][2] = color[2]; 385 st->bitmap.vertices[i][1][3] = color[3]; 386 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 387 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 388 } 389 390 /* put vertex data into vbuf */ 391 pipe_buffer_write_nooverlap(st->pipe, 392 st->bitmap.vbuf, 393 st->bitmap.vbuf_slot * sizeof st->bitmap.vertices, 394 sizeof st->bitmap.vertices, 395 st->bitmap.vertices); 396 397 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 398} 399 400 401 402/** 403 * Render a glBitmap by drawing a textured quad 404 */ 405static void 406draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 407 GLsizei width, GLsizei height, 408 struct pipe_sampler_view *sv, 409 const GLfloat *color) 410{ 411 struct st_context *st = st_context(ctx); 412 struct pipe_context *pipe = st->pipe; 413 struct cso_context *cso = st->cso_context; 414 struct st_fragment_program *stfp; 415 GLuint maxSize; 416 GLuint offset; 417 418 stfp = combined_bitmap_fragment_program(ctx); 419 420 /* As an optimization, Mesa's fragment programs will sometimes get the 421 * primary color from a statevar/constant rather than a varying variable. 422 * when that's the case, we need to ensure that we use the 'color' 423 * parameter and not the current attribute color (which may have changed 424 * through glRasterPos and state validation. 425 * So, we force the proper color here. Not elegant, but it works. 426 */ 427 { 428 GLfloat colorSave[4]; 429 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 430 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 431 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 432 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 433 } 434 435 436 /* limit checks */ 437 /* XXX if the bitmap is larger than the max texture size, break 438 * it up into chunks. 439 */ 440 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 441 assert(width <= (GLsizei)maxSize); 442 assert(height <= (GLsizei)maxSize); 443 444 cso_save_rasterizer(cso); 445 cso_save_samplers(cso); 446 cso_save_fragment_sampler_views(cso); 447 cso_save_viewport(cso); 448 cso_save_fragment_shader(cso); 449 cso_save_vertex_shader(cso); 450 cso_save_vertex_elements(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.samplers[sv->texture->target != PIPE_TEXTURE_RECT]; 471 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 472 } 473 474 /* user textures, plus the bitmap texture */ 475 { 476 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 477 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 478 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 479 sampler_views[stfp->bitmap_sampler] = sv; 480 cso_set_fragment_sampler_views(cso, num, sampler_views); 481 } 482 483 /* viewport state: viewport matching window dims */ 484 { 485 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 486 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 487 const GLfloat width = (GLfloat)fb->Width; 488 const GLfloat height = (GLfloat)fb->Height; 489 struct pipe_viewport_state vp; 490 vp.scale[0] = 0.5f * width; 491 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 492 vp.scale[2] = 0.5f; 493 vp.scale[3] = 1.0f; 494 vp.translate[0] = 0.5f * width; 495 vp.translate[1] = 0.5f * height; 496 vp.translate[2] = 0.5f; 497 vp.translate[3] = 0.0f; 498 cso_set_viewport(cso, &vp); 499 } 500 501 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 502 503 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 504 z = z * 2.0 - 1.0; 505 506 /* draw textured quad */ 507 offset = setup_bitmap_vertex_data(st, sv->texture->target != PIPE_TEXTURE_RECT, x, y, width, height, z, color); 508 509 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, 510 PIPE_PRIM_TRIANGLE_FAN, 511 4, /* verts */ 512 3); /* attribs/vert */ 513 514 515 /* restore state */ 516 cso_restore_rasterizer(cso); 517 cso_restore_samplers(cso); 518 cso_restore_fragment_sampler_views(cso); 519 cso_restore_viewport(cso); 520 cso_restore_fragment_shader(cso); 521 cso_restore_vertex_shader(cso); 522 cso_restore_vertex_elements(cso); 523} 524 525 526static void 527reset_cache(struct st_context *st) 528{ 529 struct pipe_context *pipe = st->pipe; 530 struct bitmap_cache *cache = st->bitmap.cache; 531 532 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ 533 cache->empty = GL_TRUE; 534 535 cache->xmin = 1000000; 536 cache->xmax = -1000000; 537 cache->ymin = 1000000; 538 cache->ymax = -1000000; 539 540 if (cache->trans) { 541 pipe->transfer_destroy(pipe, cache->trans); 542 cache->trans = NULL; 543 } 544 545 assert(!cache->texture); 546 547 /* allocate a new texture */ 548 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 549 st->bitmap.tex_format, 0, 550 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 551 1, 552 PIPE_BIND_SAMPLER_VIEW); 553} 554 555 556/** Print bitmap image to stdout (debug) */ 557static void 558print_cache(const struct bitmap_cache *cache) 559{ 560 int i, j, k; 561 562 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 563 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 564 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 565 if (cache->buffer[k]) 566 printf("X"); 567 else 568 printf(" "); 569 k++; 570 } 571 printf("\n"); 572 } 573} 574 575 576static void 577create_cache_trans(struct st_context *st) 578{ 579 struct pipe_context *pipe = st->pipe; 580 struct bitmap_cache *cache = st->bitmap.cache; 581 582 if (cache->trans) 583 return; 584 585 /* Map the texture transfer. 586 * Subsequent glBitmap calls will write into the texture image. 587 */ 588 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 589 PIPE_TRANSFER_WRITE, 0, 0, 590 BITMAP_CACHE_WIDTH, 591 BITMAP_CACHE_HEIGHT); 592 cache->buffer = pipe_transfer_map(pipe, cache->trans); 593 594 /* init image to all 0xff */ 595 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 596} 597 598 599/** 600 * If there's anything in the bitmap cache, draw/flush it now. 601 */ 602void 603st_flush_bitmap_cache(struct st_context *st) 604{ 605 if (!st->bitmap.cache->empty) { 606 struct bitmap_cache *cache = st->bitmap.cache; 607 608 if (st->ctx->DrawBuffer) { 609 struct pipe_context *pipe = st->pipe; 610 struct pipe_sampler_view *sv; 611 612 assert(cache->xmin <= cache->xmax); 613 614/* printf("flush size %d x %d at %d, %d\n", 615 cache->xmax - cache->xmin, 616 cache->ymax - cache->ymin, 617 cache->xpos, cache->ypos); 618*/ 619 620 /* The texture transfer has been mapped until now. 621 * So unmap and release the texture transfer before drawing. 622 */ 623 if (cache->trans) { 624 if (0) 625 print_cache(cache); 626 pipe_transfer_unmap(pipe, cache->trans); 627 cache->buffer = NULL; 628 629 pipe->transfer_destroy(pipe, cache->trans); 630 cache->trans = NULL; 631 } 632 633 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 634 if (sv) { 635 draw_bitmap_quad(st->ctx, 636 cache->xpos, 637 cache->ypos, 638 cache->zpos, 639 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 640 sv, 641 cache->color); 642 643 pipe_sampler_view_reference(&sv, NULL); 644 } 645 } 646 647 /* release/free the texture */ 648 pipe_resource_reference(&cache->texture, NULL); 649 650 reset_cache(st); 651 } 652} 653 654/* Flush bitmap cache and release vertex buffer. 655 */ 656void 657st_flush_bitmap( struct st_context *st ) 658{ 659 st_flush_bitmap_cache(st); 660 661 /* Release vertex buffer to avoid synchronous rendering if we were 662 * to map it in the next frame. 663 */ 664 pipe_resource_reference(&st->bitmap.vbuf, NULL); 665 st->bitmap.vbuf_slot = 0; 666} 667 668 669/** 670 * Try to accumulate this glBitmap call in the bitmap cache. 671 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 672 */ 673static GLboolean 674accum_bitmap(struct st_context *st, 675 GLint x, GLint y, GLsizei width, GLsizei height, 676 const struct gl_pixelstore_attrib *unpack, 677 const GLubyte *bitmap ) 678{ 679 struct bitmap_cache *cache = st->bitmap.cache; 680 int px = -999, py = -999; 681 const GLfloat z = st->ctx->Current.RasterPos[2]; 682 683 if (width > BITMAP_CACHE_WIDTH || 684 height > BITMAP_CACHE_HEIGHT) 685 return GL_FALSE; /* too big to cache */ 686 687 if (!cache->empty) { 688 px = x - cache->xpos; /* pos in buffer */ 689 py = y - cache->ypos; 690 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 691 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 692 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 693 ((fabs(z - cache->zpos) > Z_EPSILON))) { 694 /* This bitmap would extend beyond cache bounds, or the bitmap 695 * color is changing 696 * so flush and continue. 697 */ 698 st_flush_bitmap_cache(st); 699 } 700 } 701 702 if (cache->empty) { 703 /* Initialize. Center bitmap vertically in the buffer. */ 704 px = 0; 705 py = (BITMAP_CACHE_HEIGHT - height) / 2; 706 cache->xpos = x; 707 cache->ypos = y - py; 708 cache->zpos = z; 709 cache->empty = GL_FALSE; 710 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 711 } 712 713 assert(px != -999); 714 assert(py != -999); 715 716 if (x < cache->xmin) 717 cache->xmin = x; 718 if (y < cache->ymin) 719 cache->ymin = y; 720 if (x + width > cache->xmax) 721 cache->xmax = x + width; 722 if (y + height > cache->ymax) 723 cache->ymax = y + height; 724 725 /* create the transfer if needed */ 726 create_cache_trans(st); 727 728 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 729 cache->buffer, BITMAP_CACHE_WIDTH); 730 731 return GL_TRUE; /* accumulated */ 732} 733 734 735 736/** 737 * Called via ctx->Driver.Bitmap() 738 */ 739static void 740st_Bitmap(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 741 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 742{ 743 struct st_context *st = st_context(ctx); 744 struct pipe_resource *pt; 745 746 if (width == 0 || height == 0) 747 return; 748 749 st_validate_state(st); 750 751 if (!st->bitmap.vs) { 752 /* create pass-through vertex shader now */ 753 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 754 TGSI_SEMANTIC_COLOR, 755 TGSI_SEMANTIC_GENERIC }; 756 const uint semantic_indexes[] = { 0, 0, 0 }; 757 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 758 semantic_names, 759 semantic_indexes); 760 } 761 762 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 763 return; 764 765 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 766 if (pt) { 767 struct pipe_sampler_view *sv = st_create_texture_sampler_view(st->pipe, pt); 768 769 assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); 770 771 if (sv) { 772 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 773 width, height, sv, 774 st->ctx->Current.RasterColor); 775 776 pipe_sampler_view_reference(&sv, NULL); 777 } 778 779 /* release/free the texture */ 780 pipe_resource_reference(&pt, NULL); 781 } 782} 783 784 785/** Per-context init */ 786void 787st_init_bitmap_functions(struct dd_function_table *functions) 788{ 789 functions->Bitmap = st_Bitmap; 790} 791 792 793/** Per-context init */ 794void 795st_init_bitmap(struct st_context *st) 796{ 797 struct pipe_sampler_state *sampler = &st->bitmap.samplers[0]; 798 struct pipe_context *pipe = st->pipe; 799 struct pipe_screen *screen = pipe->screen; 800 801 /* init sampler state once */ 802 memset(sampler, 0, sizeof(*sampler)); 803 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 804 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 805 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 806 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 807 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 808 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 809 st->bitmap.samplers[1] = *sampler; 810 st->bitmap.samplers[1].normalized_coords = 1; 811 812 /* init baseline rasterizer state once */ 813 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 814 st->bitmap.rasterizer.gl_rasterization_rules = 1; 815 816 /* find a usable texture format */ 817 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, 0, 818 PIPE_BIND_SAMPLER_VIEW, 0)) { 819 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 820 } 821 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, PIPE_TEXTURE_2D, 0, 822 PIPE_BIND_SAMPLER_VIEW, 0)) { 823 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 824 } 825 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, PIPE_TEXTURE_2D, 0, 826 PIPE_BIND_SAMPLER_VIEW, 0)) { 827 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 828 } 829 else { 830 /* XXX support more formats */ 831 assert(0); 832 } 833 834 /* alloc bitmap cache object */ 835 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 836 837 reset_cache(st); 838} 839 840 841/** Per-context tear-down */ 842void 843st_destroy_bitmap(struct st_context *st) 844{ 845 struct pipe_context *pipe = st->pipe; 846 struct bitmap_cache *cache = st->bitmap.cache; 847 848 849 850 if (st->bitmap.vs) { 851 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 852 st->bitmap.vs = NULL; 853 } 854 855 if (st->bitmap.vbuf) { 856 pipe_resource_reference(&st->bitmap.vbuf, NULL); 857 st->bitmap.vbuf = NULL; 858 } 859 860 if (cache) { 861 if (cache->trans) { 862 pipe_transfer_unmap(pipe, cache->trans); 863 pipe->transfer_destroy(pipe, cache->trans); 864 } 865 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 866 free(st->bitmap.cache); 867 st->bitmap.cache = NULL; 868 } 869} 870 871#endif /* FEATURE_drawpix */ 872