st_cb_bitmap.c revision 3d203b610045980853d26370ee21fb2ef4aed17e
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 * \param st current context 189 * \param fpIn the incoming fragment program 190 * \param fpOut the new fragment program which does fragment culling 191 * \param bitmap_sampler sampler number for the bitmap texture 192 */ 193void 194st_make_bitmap_fragment_program(struct st_context *st, 195 struct gl_fragment_program *fpIn, 196 struct gl_fragment_program **fpOut, 197 GLuint *bitmap_sampler) 198{ 199 struct st_fragment_program *bitmap_prog; 200 struct gl_program *newProg; 201 uint sampler; 202 203 /* 204 * Generate new program which is the user-defined program prefixed 205 * with the bitmap sampler/kill instructions. 206 */ 207 sampler = find_free_bit(fpIn->Base.SamplersUsed); 208 bitmap_prog = make_bitmap_fragment_program(st->ctx, sampler); 209 210 newProg = _mesa_combine_programs(st->ctx, 211 &bitmap_prog->Base.Base, 212 &fpIn->Base); 213 /* done with this after combining */ 214 st_reference_fragprog(st, &bitmap_prog, NULL); 215 216#if 0 217 { 218 printf("Combined bitmap program:\n"); 219 _mesa_print_program(newProg); 220 printf("InputsRead: 0x%x\n", newProg->InputsRead); 221 printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten); 222 _mesa_print_parameter_list(newProg->Parameters); 223 } 224#endif 225 226 /* return results */ 227 *fpOut = (struct gl_fragment_program *) newProg; 228 *bitmap_sampler = sampler; 229} 230 231 232/** 233 * Copy user-provide bitmap bits into texture buffer, expanding 234 * bits into texels. 235 * "On" bits will set texels to 0x0. 236 * "Off" bits will not modify texels. 237 * Note that the image is actually going to be upside down in 238 * the texture. We deal with that with texcoords. 239 */ 240static void 241unpack_bitmap(struct st_context *st, 242 GLint px, GLint py, GLsizei width, GLsizei height, 243 const struct gl_pixelstore_attrib *unpack, 244 const GLubyte *bitmap, 245 ubyte *destBuffer, uint destStride) 246{ 247 destBuffer += py * destStride + px; 248 249 _mesa_expand_bitmap(width, height, unpack, bitmap, 250 destBuffer, destStride, 0x0); 251} 252 253 254/** 255 * Create a texture which represents a bitmap image. 256 */ 257static struct pipe_resource * 258make_bitmap_texture(struct gl_context *ctx, GLsizei width, GLsizei height, 259 const struct gl_pixelstore_attrib *unpack, 260 const GLubyte *bitmap) 261{ 262 struct st_context *st = st_context(ctx); 263 struct pipe_context *pipe = st->pipe; 264 struct pipe_transfer *transfer; 265 ubyte *dest; 266 struct pipe_resource *pt; 267 268 /* PBO source... */ 269 bitmap = _mesa_map_pbo_source(ctx, unpack, bitmap); 270 if (!bitmap) { 271 return NULL; 272 } 273 274 /** 275 * Create texture to hold bitmap pattern. 276 */ 277 pt = st_texture_create(st, st->internal_target, st->bitmap.tex_format, 278 0, width, height, 1, 279 PIPE_BIND_SAMPLER_VIEW); 280 if (!pt) { 281 _mesa_unmap_pbo_source(ctx, unpack); 282 return NULL; 283 } 284 285 transfer = pipe_get_transfer(st->pipe, pt, 0, 0, 286 PIPE_TRANSFER_WRITE, 287 0, 0, width, height); 288 289 dest = pipe_transfer_map(pipe, transfer); 290 291 /* Put image into texture transfer */ 292 memset(dest, 0xff, height * transfer->stride); 293 unpack_bitmap(st, 0, 0, width, height, unpack, bitmap, 294 dest, transfer->stride); 295 296 _mesa_unmap_pbo_source(ctx, unpack); 297 298 /* Release transfer */ 299 pipe_transfer_unmap(pipe, transfer); 300 pipe->transfer_destroy(pipe, transfer); 301 302 return pt; 303} 304 305static GLuint 306setup_bitmap_vertex_data(struct st_context *st, bool normalized, 307 int x, int y, int width, int height, 308 float z, const float color[4]) 309{ 310 struct pipe_context *pipe = st->pipe; 311 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 312 const GLfloat fb_width = (GLfloat)fb->Width; 313 const GLfloat fb_height = (GLfloat)fb->Height; 314 const GLfloat x0 = (GLfloat)x; 315 const GLfloat x1 = (GLfloat)(x + width); 316 const GLfloat y0 = (GLfloat)y; 317 const GLfloat y1 = (GLfloat)(y + height); 318 GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 319 GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop; 320 const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); 321 const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); 322 const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); 323 const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); 324 const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ 325 GLuint i; 326 327 if(!normalized) 328 { 329 sRight = width; 330 tBot = height; 331 } 332 333 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as 334 * no_flush) updates to buffers where we know there is no conflict 335 * with previous data. Currently using max_slots > 1 will cause 336 * synchronous rendering if the driver flushes its command buffers 337 * between one bitmap and the next. Our flush hook below isn't 338 * sufficient to catch this as the driver doesn't tell us when it 339 * flushes its own command buffers. Until this gets fixed, pay the 340 * price of allocating a new buffer for each bitmap cache-flush to 341 * avoid synchronous rendering. 342 */ 343 if (st->bitmap.vbuf_slot >= max_slots) { 344 pipe_resource_reference(&st->bitmap.vbuf, NULL); 345 st->bitmap.vbuf_slot = 0; 346 } 347 348 if (!st->bitmap.vbuf) { 349 st->bitmap.vbuf = pipe_buffer_create(pipe->screen, 350 PIPE_BIND_VERTEX_BUFFER, 351 max_slots * sizeof(st->bitmap.vertices)); 352 } 353 354 /* Positions are in clip coords since we need to do clipping in case 355 * the bitmap quad goes beyond the window bounds. 356 */ 357 st->bitmap.vertices[0][0][0] = clip_x0; 358 st->bitmap.vertices[0][0][1] = clip_y0; 359 st->bitmap.vertices[0][2][0] = sLeft; 360 st->bitmap.vertices[0][2][1] = tTop; 361 362 st->bitmap.vertices[1][0][0] = clip_x1; 363 st->bitmap.vertices[1][0][1] = clip_y0; 364 st->bitmap.vertices[1][2][0] = sRight; 365 st->bitmap.vertices[1][2][1] = tTop; 366 367 st->bitmap.vertices[2][0][0] = clip_x1; 368 st->bitmap.vertices[2][0][1] = clip_y1; 369 st->bitmap.vertices[2][2][0] = sRight; 370 st->bitmap.vertices[2][2][1] = tBot; 371 372 st->bitmap.vertices[3][0][0] = clip_x0; 373 st->bitmap.vertices[3][0][1] = clip_y1; 374 st->bitmap.vertices[3][2][0] = sLeft; 375 st->bitmap.vertices[3][2][1] = tBot; 376 377 /* same for all verts: */ 378 for (i = 0; i < 4; i++) { 379 st->bitmap.vertices[i][0][2] = z; 380 st->bitmap.vertices[i][0][3] = 1.0; 381 st->bitmap.vertices[i][1][0] = color[0]; 382 st->bitmap.vertices[i][1][1] = color[1]; 383 st->bitmap.vertices[i][1][2] = color[2]; 384 st->bitmap.vertices[i][1][3] = color[3]; 385 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 386 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 387 } 388 389 /* put vertex data into vbuf */ 390 pipe_buffer_write_nooverlap(st->pipe, 391 st->bitmap.vbuf, 392 st->bitmap.vbuf_slot * sizeof st->bitmap.vertices, 393 sizeof st->bitmap.vertices, 394 st->bitmap.vertices); 395 396 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 397} 398 399 400 401/** 402 * Render a glBitmap by drawing a textured quad 403 */ 404static void 405draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 406 GLsizei width, GLsizei height, 407 struct pipe_sampler_view *sv, 408 const GLfloat *color) 409{ 410 struct st_context *st = st_context(ctx); 411 struct pipe_context *pipe = st->pipe; 412 struct cso_context *cso = st->cso_context; 413 struct st_fp_varient *fpv; 414 struct st_fp_varient_key key; 415 GLuint maxSize; 416 GLuint offset; 417 418 memset(&key, 0, sizeof(key)); 419 key.st = st; 420 key.bitmap = GL_TRUE; 421 422 fpv = st_get_fp_varient(st, st->fp, &key); 423 424 /* As an optimization, Mesa's fragment programs will sometimes get the 425 * primary color from a statevar/constant rather than a varying variable. 426 * when that's the case, we need to ensure that we use the 'color' 427 * parameter and not the current attribute color (which may have changed 428 * through glRasterPos and state validation. 429 * So, we force the proper color here. Not elegant, but it works. 430 */ 431 { 432 GLfloat colorSave[4]; 433 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 434 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 435 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); 436 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 437 } 438 439 440 /* limit checks */ 441 /* XXX if the bitmap is larger than the max texture size, break 442 * it up into chunks. 443 */ 444 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 445 assert(width <= (GLsizei)maxSize); 446 assert(height <= (GLsizei)maxSize); 447 448 cso_save_rasterizer(cso); 449 cso_save_samplers(cso); 450 cso_save_fragment_sampler_views(cso); 451 cso_save_viewport(cso); 452 cso_save_fragment_shader(cso); 453 cso_save_vertex_shader(cso); 454 cso_save_vertex_elements(cso); 455 456 /* rasterizer state: just scissor */ 457 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 458 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 459 460 /* fragment shader state: TEX lookup program */ 461 cso_set_fragment_shader_handle(cso, fpv->driver_shader); 462 463 /* vertex shader state: position + texcoord pass-through */ 464 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 465 466 /* user samplers, plus our bitmap sampler */ 467 { 468 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 469 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_samplers); 470 uint i; 471 for (i = 0; i < st->state.num_samplers; i++) { 472 samplers[i] = &st->state.samplers[i]; 473 } 474 samplers[fpv->bitmap_sampler] = &st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT]; 475 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 476 } 477 478 /* user textures, plus the bitmap texture */ 479 { 480 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 481 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_textures); 482 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 483 sampler_views[fpv->bitmap_sampler] = sv; 484 cso_set_fragment_sampler_views(cso, num, sampler_views); 485 } 486 487 /* viewport state: viewport matching window dims */ 488 { 489 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 490 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 491 const GLfloat width = (GLfloat)fb->Width; 492 const GLfloat height = (GLfloat)fb->Height; 493 struct pipe_viewport_state vp; 494 vp.scale[0] = 0.5f * width; 495 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 496 vp.scale[2] = 0.5f; 497 vp.scale[3] = 1.0f; 498 vp.translate[0] = 0.5f * width; 499 vp.translate[1] = 0.5f * height; 500 vp.translate[2] = 0.5f; 501 vp.translate[3] = 0.0f; 502 cso_set_viewport(cso, &vp); 503 } 504 505 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 506 507 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 508 z = z * 2.0 - 1.0; 509 510 /* draw textured quad */ 511 offset = setup_bitmap_vertex_data(st, sv->texture->target != PIPE_TEXTURE_RECT, x, y, width, height, z, color); 512 513 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, 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_fragment_sampler_views(cso); 523 cso_restore_viewport(cso); 524 cso_restore_fragment_shader(cso); 525 cso_restore_vertex_shader(cso); 526 cso_restore_vertex_elements(cso); 527} 528 529 530static void 531reset_cache(struct st_context *st) 532{ 533 struct pipe_context *pipe = st->pipe; 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 if (cache->trans) { 545 pipe->transfer_destroy(pipe, cache->trans); 546 cache->trans = NULL; 547 } 548 549 assert(!cache->texture); 550 551 /* allocate a new texture */ 552 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 553 st->bitmap.tex_format, 0, 554 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 555 1, 556 PIPE_BIND_SAMPLER_VIEW); 557} 558 559 560/** Print bitmap image to stdout (debug) */ 561static void 562print_cache(const struct bitmap_cache *cache) 563{ 564 int i, j, k; 565 566 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 567 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 568 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 569 if (cache->buffer[k]) 570 printf("X"); 571 else 572 printf(" "); 573 k++; 574 } 575 printf("\n"); 576 } 577} 578 579 580static void 581create_cache_trans(struct st_context *st) 582{ 583 struct pipe_context *pipe = st->pipe; 584 struct bitmap_cache *cache = st->bitmap.cache; 585 586 if (cache->trans) 587 return; 588 589 /* Map the texture transfer. 590 * Subsequent glBitmap calls will write into the texture image. 591 */ 592 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 593 PIPE_TRANSFER_WRITE, 0, 0, 594 BITMAP_CACHE_WIDTH, 595 BITMAP_CACHE_HEIGHT); 596 cache->buffer = pipe_transfer_map(pipe, cache->trans); 597 598 /* init image to all 0xff */ 599 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 600} 601 602 603/** 604 * If there's anything in the bitmap cache, draw/flush it now. 605 */ 606void 607st_flush_bitmap_cache(struct st_context *st) 608{ 609 if (!st->bitmap.cache->empty) { 610 struct bitmap_cache *cache = st->bitmap.cache; 611 612 if (st->ctx->DrawBuffer) { 613 struct pipe_context *pipe = st->pipe; 614 struct pipe_sampler_view *sv; 615 616 assert(cache->xmin <= cache->xmax); 617 618/* printf("flush size %d x %d at %d, %d\n", 619 cache->xmax - cache->xmin, 620 cache->ymax - cache->ymin, 621 cache->xpos, cache->ypos); 622*/ 623 624 /* The texture transfer has been mapped until now. 625 * So unmap and release the texture transfer before drawing. 626 */ 627 if (cache->trans) { 628 if (0) 629 print_cache(cache); 630 pipe_transfer_unmap(pipe, cache->trans); 631 cache->buffer = NULL; 632 633 pipe->transfer_destroy(pipe, cache->trans); 634 cache->trans = NULL; 635 } 636 637 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 638 if (sv) { 639 draw_bitmap_quad(st->ctx, 640 cache->xpos, 641 cache->ypos, 642 cache->zpos, 643 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 644 sv, 645 cache->color); 646 647 pipe_sampler_view_reference(&sv, NULL); 648 } 649 } 650 651 /* release/free the texture */ 652 pipe_resource_reference(&cache->texture, NULL); 653 654 reset_cache(st); 655 } 656} 657 658/* Flush bitmap cache and release vertex buffer. 659 */ 660void 661st_flush_bitmap( struct st_context *st ) 662{ 663 st_flush_bitmap_cache(st); 664 665 /* Release vertex buffer to avoid synchronous rendering if we were 666 * to map it in the next frame. 667 */ 668 pipe_resource_reference(&st->bitmap.vbuf, NULL); 669 st->bitmap.vbuf_slot = 0; 670} 671 672 673/** 674 * Try to accumulate this glBitmap call in the bitmap cache. 675 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 676 */ 677static GLboolean 678accum_bitmap(struct st_context *st, 679 GLint x, GLint y, GLsizei width, GLsizei height, 680 const struct gl_pixelstore_attrib *unpack, 681 const GLubyte *bitmap ) 682{ 683 struct bitmap_cache *cache = st->bitmap.cache; 684 int px = -999, py = -999; 685 const GLfloat z = st->ctx->Current.RasterPos[2]; 686 687 if (width > BITMAP_CACHE_WIDTH || 688 height > BITMAP_CACHE_HEIGHT) 689 return GL_FALSE; /* too big to cache */ 690 691 if (!cache->empty) { 692 px = x - cache->xpos; /* pos in buffer */ 693 py = y - cache->ypos; 694 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 695 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 696 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 697 ((fabs(z - cache->zpos) > Z_EPSILON))) { 698 /* This bitmap would extend beyond cache bounds, or the bitmap 699 * color is changing 700 * so flush and continue. 701 */ 702 st_flush_bitmap_cache(st); 703 } 704 } 705 706 if (cache->empty) { 707 /* Initialize. Center bitmap vertically in the buffer. */ 708 px = 0; 709 py = (BITMAP_CACHE_HEIGHT - height) / 2; 710 cache->xpos = x; 711 cache->ypos = y - py; 712 cache->zpos = z; 713 cache->empty = GL_FALSE; 714 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 715 } 716 717 assert(px != -999); 718 assert(py != -999); 719 720 if (x < cache->xmin) 721 cache->xmin = x; 722 if (y < cache->ymin) 723 cache->ymin = y; 724 if (x + width > cache->xmax) 725 cache->xmax = x + width; 726 if (y + height > cache->ymax) 727 cache->ymax = y + height; 728 729 /* create the transfer if needed */ 730 create_cache_trans(st); 731 732 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 733 cache->buffer, BITMAP_CACHE_WIDTH); 734 735 return GL_TRUE; /* accumulated */ 736} 737 738 739 740/** 741 * Called via ctx->Driver.Bitmap() 742 */ 743static void 744st_Bitmap(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 745 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 746{ 747 struct st_context *st = st_context(ctx); 748 struct pipe_resource *pt; 749 750 if (width == 0 || height == 0) 751 return; 752 753 st_validate_state(st); 754 755 if (!st->bitmap.vs) { 756 /* create pass-through vertex shader now */ 757 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 758 TGSI_SEMANTIC_COLOR, 759 TGSI_SEMANTIC_GENERIC }; 760 const uint semantic_indexes[] = { 0, 0, 0 }; 761 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 762 semantic_names, 763 semantic_indexes); 764 } 765 766 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 767 return; 768 769 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 770 if (pt) { 771 struct pipe_sampler_view *sv = st_create_texture_sampler_view(st->pipe, pt); 772 773 assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); 774 775 if (sv) { 776 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 777 width, height, sv, 778 st->ctx->Current.RasterColor); 779 780 pipe_sampler_view_reference(&sv, NULL); 781 } 782 783 /* release/free the texture */ 784 pipe_resource_reference(&pt, NULL); 785 } 786} 787 788 789/** Per-context init */ 790void 791st_init_bitmap_functions(struct dd_function_table *functions) 792{ 793 functions->Bitmap = st_Bitmap; 794} 795 796 797/** Per-context init */ 798void 799st_init_bitmap(struct st_context *st) 800{ 801 struct pipe_sampler_state *sampler = &st->bitmap.samplers[0]; 802 struct pipe_context *pipe = st->pipe; 803 struct pipe_screen *screen = pipe->screen; 804 805 /* init sampler state once */ 806 memset(sampler, 0, sizeof(*sampler)); 807 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 808 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 809 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 810 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 811 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 812 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 813 st->bitmap.samplers[1] = *sampler; 814 st->bitmap.samplers[1].normalized_coords = 1; 815 816 /* init baseline rasterizer state once */ 817 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 818 st->bitmap.rasterizer.gl_rasterization_rules = 1; 819 820 /* find a usable texture format */ 821 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, 0, 822 PIPE_BIND_SAMPLER_VIEW, 0)) { 823 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 824 } 825 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, PIPE_TEXTURE_2D, 0, 826 PIPE_BIND_SAMPLER_VIEW, 0)) { 827 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 828 } 829 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, PIPE_TEXTURE_2D, 0, 830 PIPE_BIND_SAMPLER_VIEW, 0)) { 831 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 832 } 833 else { 834 /* XXX support more formats */ 835 assert(0); 836 } 837 838 /* alloc bitmap cache object */ 839 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 840 841 reset_cache(st); 842} 843 844 845/** Per-context tear-down */ 846void 847st_destroy_bitmap(struct st_context *st) 848{ 849 struct pipe_context *pipe = st->pipe; 850 struct bitmap_cache *cache = st->bitmap.cache; 851 852 853 854 if (st->bitmap.vs) { 855 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 856 st->bitmap.vs = NULL; 857 } 858 859 if (st->bitmap.vbuf) { 860 pipe_resource_reference(&st->bitmap.vbuf, NULL); 861 st->bitmap.vbuf = NULL; 862 } 863 864 if (cache) { 865 if (cache->trans) { 866 pipe_transfer_unmap(pipe, cache->trans); 867 pipe->transfer_destroy(pipe, cache->trans); 868 } 869 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 870 free(st->bitmap.cache); 871 st->bitmap.cache = NULL; 872 } 873} 874 875#endif /* FEATURE_drawpix */ 876