st_cb_bitmap.c revision ae0ef6f69f351cacdc7eaa9b21097a7c1b414e44
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(GLcontext *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(GLcontext *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(GLcontext *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, PIPE_TEXTURE_2D, 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, 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, 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 const GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 320 const 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); 325 326 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as 327 * no_flush) updates to buffers where we know there is no conflict 328 * with previous data. Currently using max_slots > 1 will cause 329 * synchronous rendering if the driver flushes its command buffers 330 * between one bitmap and the next. Our flush hook below isn't 331 * sufficient to catch this as the driver doesn't tell us when it 332 * flushes its own command buffers. Until this gets fixed, pay the 333 * price of allocating a new buffer for each bitmap cache-flush to 334 * avoid synchronous rendering. 335 */ 336 const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ 337 GLuint i; 338 339 if (st->bitmap.vbuf_slot >= max_slots) { 340 pipe_resource_reference(&st->bitmap.vbuf, NULL); 341 st->bitmap.vbuf_slot = 0; 342 } 343 344 if (!st->bitmap.vbuf) { 345 st->bitmap.vbuf = pipe_buffer_create(pipe->screen, 346 PIPE_BIND_VERTEX_BUFFER, 347 max_slots * sizeof(st->bitmap.vertices)); 348 } 349 350 /* Positions are in clip coords since we need to do clipping in case 351 * the bitmap quad goes beyond the window bounds. 352 */ 353 st->bitmap.vertices[0][0][0] = clip_x0; 354 st->bitmap.vertices[0][0][1] = clip_y0; 355 st->bitmap.vertices[0][2][0] = sLeft; 356 st->bitmap.vertices[0][2][1] = tTop; 357 358 st->bitmap.vertices[1][0][0] = clip_x1; 359 st->bitmap.vertices[1][0][1] = clip_y0; 360 st->bitmap.vertices[1][2][0] = sRight; 361 st->bitmap.vertices[1][2][1] = tTop; 362 363 st->bitmap.vertices[2][0][0] = clip_x1; 364 st->bitmap.vertices[2][0][1] = clip_y1; 365 st->bitmap.vertices[2][2][0] = sRight; 366 st->bitmap.vertices[2][2][1] = tBot; 367 368 st->bitmap.vertices[3][0][0] = clip_x0; 369 st->bitmap.vertices[3][0][1] = clip_y1; 370 st->bitmap.vertices[3][2][0] = sLeft; 371 st->bitmap.vertices[3][2][1] = tBot; 372 373 /* same for all verts: */ 374 for (i = 0; i < 4; i++) { 375 st->bitmap.vertices[i][0][2] = z; 376 st->bitmap.vertices[i][0][3] = 1.0; 377 st->bitmap.vertices[i][1][0] = color[0]; 378 st->bitmap.vertices[i][1][1] = color[1]; 379 st->bitmap.vertices[i][1][2] = color[2]; 380 st->bitmap.vertices[i][1][3] = color[3]; 381 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 382 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 383 } 384 385 /* put vertex data into vbuf */ 386 pipe_buffer_write_nooverlap(st->pipe, 387 st->bitmap.vbuf, 388 st->bitmap.vbuf_slot * sizeof st->bitmap.vertices, 389 sizeof st->bitmap.vertices, 390 st->bitmap.vertices); 391 392 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 393} 394 395 396 397/** 398 * Render a glBitmap by drawing a textured quad 399 */ 400static void 401draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, 402 GLsizei width, GLsizei height, 403 struct pipe_sampler_view *sv, 404 const GLfloat *color) 405{ 406 struct st_context *st = st_context(ctx); 407 struct pipe_context *pipe = st->pipe; 408 struct cso_context *cso = st->cso_context; 409 struct st_fragment_program *stfp; 410 GLuint maxSize; 411 GLuint offset; 412 413 stfp = combined_bitmap_fragment_program(ctx); 414 415 /* As an optimization, Mesa's fragment programs will sometimes get the 416 * primary color from a statevar/constant rather than a varying variable. 417 * when that's the case, we need to ensure that we use the 'color' 418 * parameter and not the current attribute color (which may have changed 419 * through glRasterPos and state validation. 420 * So, we force the proper color here. Not elegant, but it works. 421 */ 422 { 423 GLfloat colorSave[4]; 424 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 425 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 426 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 427 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 428 } 429 430 431 /* limit checks */ 432 /* XXX if the bitmap is larger than the max texture size, break 433 * it up into chunks. 434 */ 435 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 436 assert(width <= (GLsizei)maxSize); 437 assert(height <= (GLsizei)maxSize); 438 439 cso_save_rasterizer(cso); 440 cso_save_samplers(cso); 441 cso_save_fragment_sampler_views(cso); 442 cso_save_viewport(cso); 443 cso_save_fragment_shader(cso); 444 cso_save_vertex_shader(cso); 445 cso_save_vertex_elements(cso); 446 447 /* rasterizer state: just scissor */ 448 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 449 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 450 451 /* fragment shader state: TEX lookup program */ 452 cso_set_fragment_shader_handle(cso, stfp->driver_shader); 453 454 /* vertex shader state: position + texcoord pass-through */ 455 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 456 457 /* user samplers, plus our bitmap sampler */ 458 { 459 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 460 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); 461 uint i; 462 for (i = 0; i < st->state.num_samplers; i++) { 463 samplers[i] = &st->state.samplers[i]; 464 } 465 samplers[stfp->bitmap_sampler] = &st->bitmap.sampler; 466 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 467 } 468 469 /* user textures, plus the bitmap texture */ 470 { 471 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 472 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 473 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 474 sampler_views[stfp->bitmap_sampler] = sv; 475 cso_set_fragment_sampler_views(cso, num, sampler_views); 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 GLfloat width = (GLfloat)fb->Width; 483 const GLfloat height = (GLfloat)fb->Height; 484 struct pipe_viewport_state vp; 485 vp.scale[0] = 0.5f * width; 486 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 487 vp.scale[2] = 0.5f; 488 vp.scale[3] = 1.0f; 489 vp.translate[0] = 0.5f * width; 490 vp.translate[1] = 0.5f * height; 491 vp.translate[2] = 0.5f; 492 vp.translate[3] = 0.0f; 493 cso_set_viewport(cso, &vp); 494 } 495 496 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 497 498 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 499 z = z * 2.0 - 1.0; 500 501 /* draw textured quad */ 502 offset = setup_bitmap_vertex_data(st, x, y, width, height, z, color); 503 504 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, 505 PIPE_PRIM_TRIANGLE_FAN, 506 4, /* verts */ 507 3); /* attribs/vert */ 508 509 510 /* restore state */ 511 cso_restore_rasterizer(cso); 512 cso_restore_samplers(cso); 513 cso_restore_fragment_sampler_views(cso); 514 cso_restore_viewport(cso); 515 cso_restore_fragment_shader(cso); 516 cso_restore_vertex_shader(cso); 517 cso_restore_vertex_elements(cso); 518} 519 520 521static void 522reset_cache(struct st_context *st) 523{ 524 struct pipe_context *pipe = st->pipe; 525 struct bitmap_cache *cache = st->bitmap.cache; 526 527 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ 528 cache->empty = GL_TRUE; 529 530 cache->xmin = 1000000; 531 cache->xmax = -1000000; 532 cache->ymin = 1000000; 533 cache->ymax = -1000000; 534 535 if (cache->trans) { 536 pipe->transfer_destroy(pipe, cache->trans); 537 cache->trans = NULL; 538 } 539 540 assert(!cache->texture); 541 542 /* allocate a new texture */ 543 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 544 st->bitmap.tex_format, 0, 545 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 546 1, 547 PIPE_BIND_SAMPLER_VIEW); 548} 549 550 551/** Print bitmap image to stdout (debug) */ 552static void 553print_cache(const struct bitmap_cache *cache) 554{ 555 int i, j, k; 556 557 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 558 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 559 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 560 if (cache->buffer[k]) 561 printf("X"); 562 else 563 printf(" "); 564 k++; 565 } 566 printf("\n"); 567 } 568} 569 570 571static void 572create_cache_trans(struct st_context *st) 573{ 574 struct pipe_context *pipe = st->pipe; 575 struct bitmap_cache *cache = st->bitmap.cache; 576 577 if (cache->trans) 578 return; 579 580 /* Map the texture transfer. 581 * Subsequent glBitmap calls will write into the texture image. 582 */ 583 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 0, 584 PIPE_TRANSFER_WRITE, 0, 0, 585 BITMAP_CACHE_WIDTH, 586 BITMAP_CACHE_HEIGHT); 587 cache->buffer = pipe_transfer_map(pipe, cache->trans); 588 589 /* init image to all 0xff */ 590 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 591} 592 593 594/** 595 * If there's anything in the bitmap cache, draw/flush it now. 596 */ 597void 598st_flush_bitmap_cache(struct st_context *st) 599{ 600 if (!st->bitmap.cache->empty) { 601 struct bitmap_cache *cache = st->bitmap.cache; 602 603 if (st->ctx->DrawBuffer) { 604 struct pipe_context *pipe = st->pipe; 605 struct pipe_sampler_view *sv; 606 607 assert(cache->xmin <= cache->xmax); 608 609/* printf("flush size %d x %d at %d, %d\n", 610 cache->xmax - cache->xmin, 611 cache->ymax - cache->ymin, 612 cache->xpos, cache->ypos); 613*/ 614 615 /* The texture transfer has been mapped until now. 616 * So unmap and release the texture transfer before drawing. 617 */ 618 if (cache->trans) { 619 if (0) 620 print_cache(cache); 621 pipe_transfer_unmap(pipe, cache->trans); 622 cache->buffer = NULL; 623 624 pipe->transfer_destroy(pipe, cache->trans); 625 cache->trans = NULL; 626 } 627 628 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 629 if (sv) { 630 draw_bitmap_quad(st->ctx, 631 cache->xpos, 632 cache->ypos, 633 cache->zpos, 634 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 635 sv, 636 cache->color); 637 638 pipe_sampler_view_reference(&sv, NULL); 639 } 640 } 641 642 /* release/free the texture */ 643 pipe_resource_reference(&cache->texture, NULL); 644 645 reset_cache(st); 646 } 647} 648 649/* Flush bitmap cache and release vertex buffer. 650 */ 651void 652st_flush_bitmap( struct st_context *st ) 653{ 654 st_flush_bitmap_cache(st); 655 656 /* Release vertex buffer to avoid synchronous rendering if we were 657 * to map it in the next frame. 658 */ 659 pipe_resource_reference(&st->bitmap.vbuf, NULL); 660 st->bitmap.vbuf_slot = 0; 661} 662 663 664/** 665 * Try to accumulate this glBitmap call in the bitmap cache. 666 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 667 */ 668static GLboolean 669accum_bitmap(struct st_context *st, 670 GLint x, GLint y, GLsizei width, GLsizei height, 671 const struct gl_pixelstore_attrib *unpack, 672 const GLubyte *bitmap ) 673{ 674 struct bitmap_cache *cache = st->bitmap.cache; 675 int px = -999, py = -999; 676 const GLfloat z = st->ctx->Current.RasterPos[2]; 677 678 if (width > BITMAP_CACHE_WIDTH || 679 height > BITMAP_CACHE_HEIGHT) 680 return GL_FALSE; /* too big to cache */ 681 682 if (!cache->empty) { 683 px = x - cache->xpos; /* pos in buffer */ 684 py = y - cache->ypos; 685 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 686 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 687 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 688 ((fabs(z - cache->zpos) > Z_EPSILON))) { 689 /* This bitmap would extend beyond cache bounds, or the bitmap 690 * color is changing 691 * so flush and continue. 692 */ 693 st_flush_bitmap_cache(st); 694 } 695 } 696 697 if (cache->empty) { 698 /* Initialize. Center bitmap vertically in the buffer. */ 699 px = 0; 700 py = (BITMAP_CACHE_HEIGHT - height) / 2; 701 cache->xpos = x; 702 cache->ypos = y - py; 703 cache->zpos = z; 704 cache->empty = GL_FALSE; 705 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 706 } 707 708 assert(px != -999); 709 assert(py != -999); 710 711 if (x < cache->xmin) 712 cache->xmin = x; 713 if (y < cache->ymin) 714 cache->ymin = y; 715 if (x + width > cache->xmax) 716 cache->xmax = x + width; 717 if (y + height > cache->ymax) 718 cache->ymax = y + height; 719 720 /* create the transfer if needed */ 721 create_cache_trans(st); 722 723 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 724 cache->buffer, BITMAP_CACHE_WIDTH); 725 726 return GL_TRUE; /* accumulated */ 727} 728 729 730 731/** 732 * Called via ctx->Driver.Bitmap() 733 */ 734static void 735st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 736 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 737{ 738 struct st_context *st = st_context(ctx); 739 struct pipe_resource *pt; 740 741 if (width == 0 || height == 0) 742 return; 743 744 st_validate_state(st); 745 746 if (!st->bitmap.vs) { 747 /* create pass-through vertex shader now */ 748 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 749 TGSI_SEMANTIC_COLOR, 750 TGSI_SEMANTIC_GENERIC }; 751 const uint semantic_indexes[] = { 0, 0, 0 }; 752 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 753 semantic_names, 754 semantic_indexes); 755 } 756 757 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 758 return; 759 760 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 761 if (pt) { 762 struct pipe_sampler_view *sv = st_create_texture_sampler_view(st->pipe, pt); 763 764 assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); 765 766 if (sv) { 767 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 768 width, height, sv, 769 st->ctx->Current.RasterColor); 770 771 pipe_sampler_view_reference(&sv, NULL); 772 } 773 774 /* release/free the texture */ 775 pipe_resource_reference(&pt, NULL); 776 } 777} 778 779 780/** Per-context init */ 781void 782st_init_bitmap_functions(struct dd_function_table *functions) 783{ 784 functions->Bitmap = st_Bitmap; 785} 786 787 788/** Per-context init */ 789void 790st_init_bitmap(struct st_context *st) 791{ 792 struct pipe_sampler_state *sampler = &st->bitmap.sampler; 793 struct pipe_context *pipe = st->pipe; 794 struct pipe_screen *screen = pipe->screen; 795 796 /* init sampler state once */ 797 memset(sampler, 0, sizeof(*sampler)); 798 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 799 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 800 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 801 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 802 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 803 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 804 sampler->normalized_coords = 1; 805 806 /* init baseline rasterizer state once */ 807 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 808 st->bitmap.rasterizer.gl_rasterization_rules = 1; 809 810 /* find a usable texture format */ 811 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, 0, 812 PIPE_BIND_SAMPLER_VIEW, 0)) { 813 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 814 } 815 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, PIPE_TEXTURE_2D, 0, 816 PIPE_BIND_SAMPLER_VIEW, 0)) { 817 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 818 } 819 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, PIPE_TEXTURE_2D, 0, 820 PIPE_BIND_SAMPLER_VIEW, 0)) { 821 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 822 } 823 else { 824 /* XXX support more formats */ 825 assert(0); 826 } 827 828 /* alloc bitmap cache object */ 829 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 830 831 reset_cache(st); 832} 833 834 835/** Per-context tear-down */ 836void 837st_destroy_bitmap(struct st_context *st) 838{ 839 struct pipe_context *pipe = st->pipe; 840 struct bitmap_cache *cache = st->bitmap.cache; 841 842 843 844 if (st->bitmap.vs) { 845 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 846 st->bitmap.vs = NULL; 847 } 848 849 if (st->bitmap.vbuf) { 850 pipe_resource_reference(&st->bitmap.vbuf, NULL); 851 st->bitmap.vbuf = NULL; 852 } 853 854 if (cache) { 855 if (cache->trans) { 856 pipe_transfer_unmap(pipe, cache->trans); 857 pipe->transfer_destroy(pipe, cache->trans); 858 } 859 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 860 free(st->bitmap.cache); 861 st->bitmap.cache = NULL; 862 } 863} 864 865#endif /* FEATURE_drawpix */ 866