st_cb_bitmap.c revision 43b7b9d02aa3a3670fd30619ef2b2366abf955dc
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 * 352 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 394 * sizeof(st->bitmap.vertices), 395 sizeof st->bitmap.vertices, 396 st->bitmap.vertices); 397 398 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 399} 400 401 402 403/** 404 * Render a glBitmap by drawing a textured quad 405 */ 406static void 407draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 408 GLsizei width, GLsizei height, 409 struct pipe_sampler_view *sv, 410 const GLfloat *color) 411{ 412 struct st_context *st = st_context(ctx); 413 struct pipe_context *pipe = st->pipe; 414 struct cso_context *cso = st->cso_context; 415 struct st_fp_varient *fpv; 416 struct st_fp_varient_key key; 417 GLuint maxSize; 418 GLuint offset; 419 420 memset(&key, 0, sizeof(key)); 421 key.st = st; 422 key.bitmap = GL_TRUE; 423 424 fpv = st_get_fp_varient(st, st->fp, &key); 425 426 /* As an optimization, Mesa's fragment programs will sometimes get the 427 * primary color from a statevar/constant rather than a varying variable. 428 * when that's the case, we need to ensure that we use the 'color' 429 * parameter and not the current attribute color (which may have changed 430 * through glRasterPos and state validation. 431 * So, we force the proper color here. Not elegant, but it works. 432 */ 433 { 434 GLfloat colorSave[4]; 435 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 436 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 437 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); 438 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 439 } 440 441 442 /* limit checks */ 443 /* XXX if the bitmap is larger than the max texture size, break 444 * it up into chunks. 445 */ 446 maxSize = 1 << (pipe->screen->get_param(pipe->screen, 447 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 448 assert(width <= (GLsizei)maxSize); 449 assert(height <= (GLsizei)maxSize); 450 451 cso_save_rasterizer(cso); 452 cso_save_samplers(cso); 453 cso_save_fragment_sampler_views(cso); 454 cso_save_viewport(cso); 455 cso_save_fragment_shader(cso); 456 cso_save_vertex_shader(cso); 457 cso_save_vertex_elements(cso); 458 459 /* rasterizer state: just scissor */ 460 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 461 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 462 463 /* fragment shader state: TEX lookup program */ 464 cso_set_fragment_shader_handle(cso, fpv->driver_shader); 465 466 /* vertex shader state: position + texcoord pass-through */ 467 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 468 469 /* user samplers, plus our bitmap sampler */ 470 { 471 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 472 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_samplers); 473 uint i; 474 for (i = 0; i < st->state.num_samplers; i++) { 475 samplers[i] = &st->state.samplers[i]; 476 } 477 samplers[fpv->bitmap_sampler] = 478 &st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT]; 479 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 480 } 481 482 /* user textures, plus the bitmap texture */ 483 { 484 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 485 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_textures); 486 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 487 sampler_views[fpv->bitmap_sampler] = sv; 488 cso_set_fragment_sampler_views(cso, num, sampler_views); 489 } 490 491 /* viewport state: viewport matching window dims */ 492 { 493 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 494 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 495 const GLfloat width = (GLfloat)fb->Width; 496 const GLfloat height = (GLfloat)fb->Height; 497 struct pipe_viewport_state vp; 498 vp.scale[0] = 0.5f * width; 499 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 500 vp.scale[2] = 0.5f; 501 vp.scale[3] = 1.0f; 502 vp.translate[0] = 0.5f * width; 503 vp.translate[1] = 0.5f * height; 504 vp.translate[2] = 0.5f; 505 vp.translate[3] = 0.0f; 506 cso_set_viewport(cso, &vp); 507 } 508 509 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 510 511 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 512 z = z * 2.0 - 1.0; 513 514 /* draw textured quad */ 515 offset = setup_bitmap_vertex_data(st, 516 sv->texture->target != PIPE_TEXTURE_RECT, 517 x, y, width, height, z, color); 518 519 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, 520 PIPE_PRIM_TRIANGLE_FAN, 521 4, /* verts */ 522 3); /* attribs/vert */ 523 524 525 /* restore state */ 526 cso_restore_rasterizer(cso); 527 cso_restore_samplers(cso); 528 cso_restore_fragment_sampler_views(cso); 529 cso_restore_viewport(cso); 530 cso_restore_fragment_shader(cso); 531 cso_restore_vertex_shader(cso); 532 cso_restore_vertex_elements(cso); 533} 534 535 536static void 537reset_cache(struct st_context *st) 538{ 539 struct pipe_context *pipe = st->pipe; 540 struct bitmap_cache *cache = st->bitmap.cache; 541 542 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ 543 cache->empty = GL_TRUE; 544 545 cache->xmin = 1000000; 546 cache->xmax = -1000000; 547 cache->ymin = 1000000; 548 cache->ymax = -1000000; 549 550 if (cache->trans) { 551 pipe->transfer_destroy(pipe, cache->trans); 552 cache->trans = NULL; 553 } 554 555 assert(!cache->texture); 556 557 /* allocate a new texture */ 558 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 559 st->bitmap.tex_format, 0, 560 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 561 1, 562 PIPE_BIND_SAMPLER_VIEW); 563} 564 565 566/** Print bitmap image to stdout (debug) */ 567static void 568print_cache(const struct bitmap_cache *cache) 569{ 570 int i, j, k; 571 572 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 573 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 574 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 575 if (cache->buffer[k]) 576 printf("X"); 577 else 578 printf(" "); 579 k++; 580 } 581 printf("\n"); 582 } 583} 584 585 586/** 587 * Create gallium pipe_transfer object for the bitmap cache. 588 */ 589static void 590create_cache_trans(struct st_context *st) 591{ 592 struct pipe_context *pipe = st->pipe; 593 struct bitmap_cache *cache = st->bitmap.cache; 594 595 if (cache->trans) 596 return; 597 598 /* Map the texture transfer. 599 * Subsequent glBitmap calls will write into the texture image. 600 */ 601 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 602 PIPE_TRANSFER_WRITE, 0, 0, 603 BITMAP_CACHE_WIDTH, 604 BITMAP_CACHE_HEIGHT); 605 cache->buffer = pipe_transfer_map(pipe, cache->trans); 606 607 /* init image to all 0xff */ 608 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 609} 610 611 612/** 613 * If there's anything in the bitmap cache, draw/flush it now. 614 */ 615void 616st_flush_bitmap_cache(struct st_context *st) 617{ 618 if (!st->bitmap.cache->empty) { 619 struct bitmap_cache *cache = st->bitmap.cache; 620 621 if (st->ctx->DrawBuffer) { 622 struct pipe_context *pipe = st->pipe; 623 struct pipe_sampler_view *sv; 624 625 assert(cache->xmin <= cache->xmax); 626 627/* printf("flush size %d x %d at %d, %d\n", 628 cache->xmax - cache->xmin, 629 cache->ymax - cache->ymin, 630 cache->xpos, cache->ypos); 631*/ 632 633 /* The texture transfer has been mapped until now. 634 * So unmap and release the texture transfer before drawing. 635 */ 636 if (cache->trans) { 637 if (0) 638 print_cache(cache); 639 pipe_transfer_unmap(pipe, cache->trans); 640 cache->buffer = NULL; 641 642 pipe->transfer_destroy(pipe, cache->trans); 643 cache->trans = NULL; 644 } 645 646 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 647 if (sv) { 648 draw_bitmap_quad(st->ctx, 649 cache->xpos, 650 cache->ypos, 651 cache->zpos, 652 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 653 sv, 654 cache->color); 655 656 pipe_sampler_view_reference(&sv, NULL); 657 } 658 } 659 660 /* release/free the texture */ 661 pipe_resource_reference(&cache->texture, NULL); 662 663 reset_cache(st); 664 } 665} 666 667 668/** 669 * Flush bitmap cache and release vertex buffer. 670 */ 671void 672st_flush_bitmap( struct st_context *st ) 673{ 674 st_flush_bitmap_cache(st); 675 676 /* Release vertex buffer to avoid synchronous rendering if we were 677 * to map it in the next frame. 678 */ 679 pipe_resource_reference(&st->bitmap.vbuf, NULL); 680 st->bitmap.vbuf_slot = 0; 681} 682 683 684/** 685 * Try to accumulate this glBitmap call in the bitmap cache. 686 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 687 */ 688static GLboolean 689accum_bitmap(struct st_context *st, 690 GLint x, GLint y, GLsizei width, GLsizei height, 691 const struct gl_pixelstore_attrib *unpack, 692 const GLubyte *bitmap ) 693{ 694 struct bitmap_cache *cache = st->bitmap.cache; 695 int px = -999, py = -999; 696 const GLfloat z = st->ctx->Current.RasterPos[2]; 697 698 if (width > BITMAP_CACHE_WIDTH || 699 height > BITMAP_CACHE_HEIGHT) 700 return GL_FALSE; /* too big to cache */ 701 702 if (!cache->empty) { 703 px = x - cache->xpos; /* pos in buffer */ 704 py = y - cache->ypos; 705 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 706 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 707 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 708 ((fabs(z - cache->zpos) > Z_EPSILON))) { 709 /* This bitmap would extend beyond cache bounds, or the bitmap 710 * color is changing 711 * so flush and continue. 712 */ 713 st_flush_bitmap_cache(st); 714 } 715 } 716 717 if (cache->empty) { 718 /* Initialize. Center bitmap vertically in the buffer. */ 719 px = 0; 720 py = (BITMAP_CACHE_HEIGHT - height) / 2; 721 cache->xpos = x; 722 cache->ypos = y - py; 723 cache->zpos = z; 724 cache->empty = GL_FALSE; 725 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 726 } 727 728 assert(px != -999); 729 assert(py != -999); 730 731 if (x < cache->xmin) 732 cache->xmin = x; 733 if (y < cache->ymin) 734 cache->ymin = y; 735 if (x + width > cache->xmax) 736 cache->xmax = x + width; 737 if (y + height > cache->ymax) 738 cache->ymax = y + height; 739 740 /* create the transfer if needed */ 741 create_cache_trans(st); 742 743 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 744 cache->buffer, BITMAP_CACHE_WIDTH); 745 746 return GL_TRUE; /* accumulated */ 747} 748 749 750 751/** 752 * Called via ctx->Driver.Bitmap() 753 */ 754static void 755st_Bitmap(struct gl_context *ctx, GLint x, GLint y, 756 GLsizei width, GLsizei height, 757 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 758{ 759 struct st_context *st = st_context(ctx); 760 struct pipe_resource *pt; 761 762 if (width == 0 || height == 0) 763 return; 764 765 st_validate_state(st); 766 767 if (!st->bitmap.vs) { 768 /* create pass-through vertex shader now */ 769 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 770 TGSI_SEMANTIC_COLOR, 771 TGSI_SEMANTIC_GENERIC }; 772 const uint semantic_indexes[] = { 0, 0, 0 }; 773 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 774 semantic_names, 775 semantic_indexes); 776 } 777 778 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 779 return; 780 781 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 782 if (pt) { 783 struct pipe_sampler_view *sv = 784 st_create_texture_sampler_view(st->pipe, pt); 785 786 assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); 787 788 if (sv) { 789 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 790 width, height, sv, 791 st->ctx->Current.RasterColor); 792 793 pipe_sampler_view_reference(&sv, NULL); 794 } 795 796 /* release/free the texture */ 797 pipe_resource_reference(&pt, NULL); 798 } 799} 800 801 802/** Per-context init */ 803void 804st_init_bitmap_functions(struct dd_function_table *functions) 805{ 806 functions->Bitmap = st_Bitmap; 807} 808 809 810/** Per-context init */ 811void 812st_init_bitmap(struct st_context *st) 813{ 814 struct pipe_sampler_state *sampler = &st->bitmap.samplers[0]; 815 struct pipe_context *pipe = st->pipe; 816 struct pipe_screen *screen = pipe->screen; 817 818 /* init sampler state once */ 819 memset(sampler, 0, sizeof(*sampler)); 820 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 821 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 822 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 823 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 824 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 825 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 826 st->bitmap.samplers[1] = *sampler; 827 st->bitmap.samplers[1].normalized_coords = 1; 828 829 /* init baseline rasterizer state once */ 830 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 831 st->bitmap.rasterizer.gl_rasterization_rules = 1; 832 833 /* find a usable texture format */ 834 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, 835 PIPE_TEXTURE_2D, 0, 836 PIPE_BIND_SAMPLER_VIEW, 0)) { 837 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 838 } 839 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, 840 PIPE_TEXTURE_2D, 0, 841 PIPE_BIND_SAMPLER_VIEW, 0)) { 842 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 843 } 844 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, 845 PIPE_TEXTURE_2D, 0, 846 PIPE_BIND_SAMPLER_VIEW, 0)) { 847 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 848 } 849 else { 850 /* XXX support more formats */ 851 assert(0); 852 } 853 854 /* alloc bitmap cache object */ 855 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 856 857 reset_cache(st); 858} 859 860 861/** Per-context tear-down */ 862void 863st_destroy_bitmap(struct st_context *st) 864{ 865 struct pipe_context *pipe = st->pipe; 866 struct bitmap_cache *cache = st->bitmap.cache; 867 868 if (st->bitmap.vs) { 869 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 870 st->bitmap.vs = NULL; 871 } 872 873 if (st->bitmap.vbuf) { 874 pipe_resource_reference(&st->bitmap.vbuf, NULL); 875 st->bitmap.vbuf = NULL; 876 } 877 878 if (cache) { 879 if (cache->trans) { 880 pipe_transfer_unmap(pipe, cache->trans); 881 pipe->transfer_destroy(pipe, cache->trans); 882 } 883 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 884 free(st->bitmap.cache); 885 st->bitmap.cache = NULL; 886 } 887} 888 889#endif /* FEATURE_drawpix */ 890