st_cb_bitmap.c revision e968975cb57eb854769292f7c6ff773c64a386c3
1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /* 29 * Authors: 30 * Brian Paul 31 */ 32 33#include "main/imports.h" 34#include "main/image.h" 35#include "main/bufferobj.h" 36#include "main/macros.h" 37#include "main/mfeatures.h" 38#include "main/pbo.h" 39#include "program/program.h" 40#include "program/prog_print.h" 41 42#include "st_context.h" 43#include "st_atom.h" 44#include "st_atom_constbuf.h" 45#include "st_program.h" 46#include "st_cb_bitmap.h" 47#include "st_texture.h" 48 49#include "pipe/p_context.h" 50#include "pipe/p_defines.h" 51#include "pipe/p_shader_tokens.h" 52#include "util/u_inlines.h" 53#include "util/u_draw_quad.h" 54#include "util/u_simple_shaders.h" 55#include "program/prog_instruction.h" 56#include "cso_cache/cso_context.h" 57 58 59#if FEATURE_drawpix 60 61/** 62 * glBitmaps are drawn as textured quads. The user's bitmap pattern 63 * is stored in a texture image. An alpha8 texture format is used. 64 * The fragment shader samples a bit (texel) from the texture, then 65 * discards the fragment if the bit is off. 66 * 67 * Note that we actually store the inverse image of the bitmap to 68 * simplify the fragment program. An "on" bit gets stored as texel=0x0 69 * and an "off" bit is stored as texel=0xff. Then we kill the 70 * fragment if the negated texel value is less than zero. 71 */ 72 73 74/** 75 * The bitmap cache attempts to accumulate multiple glBitmap calls in a 76 * buffer which is then rendered en mass upon a flush, state change, etc. 77 * A wide, short buffer is used to target the common case of a series 78 * of glBitmap calls being used to draw text. 79 */ 80static GLboolean UseBitmapCache = GL_TRUE; 81 82 83#define BITMAP_CACHE_WIDTH 512 84#define BITMAP_CACHE_HEIGHT 32 85 86struct bitmap_cache 87{ 88 /** Window pos to render the cached image */ 89 GLint xpos, ypos; 90 /** Bounds of region used in window coords */ 91 GLint xmin, ymin, xmax, ymax; 92 93 GLfloat color[4]; 94 95 /** Bitmap's Z position */ 96 GLfloat zpos; 97 98 struct pipe_resource *texture; 99 struct pipe_transfer *trans; 100 101 GLboolean empty; 102 103 /** An I8 texture image: */ 104 ubyte *buffer; 105}; 106 107 108/** Epsilon for Z comparisons */ 109#define Z_EPSILON 1e-06 110 111 112/** 113 * Make fragment program for glBitmap: 114 * Sample the texture and kill the fragment if the bit is 0. 115 * This program will be combined with the user's fragment program. 116 */ 117static struct st_fragment_program * 118make_bitmap_fragment_program(struct gl_context *ctx, GLuint samplerIndex) 119{ 120 struct st_context *st = st_context(ctx); 121 struct st_fragment_program *stfp; 122 struct gl_program *p; 123 GLuint ic = 0; 124 125 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 126 if (!p) 127 return NULL; 128 129 p->NumInstructions = 3; 130 131 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 132 if (!p->Instructions) { 133 ctx->Driver.DeleteProgram(ctx, p); 134 return NULL; 135 } 136 _mesa_init_instructions(p->Instructions, p->NumInstructions); 137 138 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 139 p->Instructions[ic].Opcode = OPCODE_TEX; 140 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 141 p->Instructions[ic].DstReg.Index = 0; 142 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 143 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 144 p->Instructions[ic].TexSrcUnit = samplerIndex; 145 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 146 ic++; 147 148 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 149 p->Instructions[ic].Opcode = OPCODE_KIL; 150 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 151 152 if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM) 153 p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_XXXX; 154 155 p->Instructions[ic].SrcReg[0].Index = 0; 156 p->Instructions[ic].SrcReg[0].Negate = NEGATE_XYZW; 157 ic++; 158 159 /* END; */ 160 p->Instructions[ic++].Opcode = OPCODE_END; 161 162 assert(ic == p->NumInstructions); 163 164 p->InputsRead = FRAG_BIT_TEX0; 165 p->OutputsWritten = 0x0; 166 p->SamplersUsed = (1 << samplerIndex); 167 168 stfp = (struct st_fragment_program *) p; 169 stfp->Base.UsesKill = GL_TRUE; 170 171 return stfp; 172} 173 174 175static int 176find_free_bit(uint bitfield) 177{ 178 int i; 179 for (i = 0; i < 32; i++) { 180 if ((bitfield & (1 << i)) == 0) { 181 return i; 182 } 183 } 184 return -1; 185} 186 187 188/** 189 * Combine basic bitmap fragment program with the user-defined program. 190 * \param st current context 191 * \param fpIn the incoming fragment program 192 * \param fpOut the new fragment program which does fragment culling 193 * \param bitmap_sampler sampler number for the bitmap texture 194 */ 195void 196st_make_bitmap_fragment_program(struct st_context *st, 197 struct gl_fragment_program *fpIn, 198 struct gl_fragment_program **fpOut, 199 GLuint *bitmap_sampler) 200{ 201 struct st_fragment_program *bitmap_prog; 202 struct gl_program *newProg; 203 uint sampler; 204 205 /* 206 * Generate new program which is the user-defined program prefixed 207 * with the bitmap sampler/kill instructions. 208 */ 209 sampler = find_free_bit(fpIn->Base.SamplersUsed); 210 bitmap_prog = make_bitmap_fragment_program(st->ctx, sampler); 211 212 newProg = _mesa_combine_programs(st->ctx, 213 &bitmap_prog->Base.Base, 214 &fpIn->Base); 215 /* done with this after combining */ 216 st_reference_fragprog(st, &bitmap_prog, NULL); 217 218#if 0 219 { 220 printf("Combined bitmap program:\n"); 221 _mesa_print_program(newProg); 222 printf("InputsRead: 0x%x\n", newProg->InputsRead); 223 printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten); 224 _mesa_print_parameter_list(newProg->Parameters); 225 } 226#endif 227 228 /* return results */ 229 *fpOut = (struct gl_fragment_program *) newProg; 230 *bitmap_sampler = sampler; 231} 232 233 234/** 235 * Copy user-provide bitmap bits into texture buffer, expanding 236 * bits into texels. 237 * "On" bits will set texels to 0x0. 238 * "Off" bits will not modify texels. 239 * Note that the image is actually going to be upside down in 240 * the texture. We deal with that with texcoords. 241 */ 242static void 243unpack_bitmap(struct st_context *st, 244 GLint px, GLint py, GLsizei width, GLsizei height, 245 const struct gl_pixelstore_attrib *unpack, 246 const GLubyte *bitmap, 247 ubyte *destBuffer, uint destStride) 248{ 249 destBuffer += py * destStride + px; 250 251 _mesa_expand_bitmap(width, height, unpack, bitmap, 252 destBuffer, destStride, 0x0); 253} 254 255 256/** 257 * Create a texture which represents a bitmap image. 258 */ 259static struct pipe_resource * 260make_bitmap_texture(struct gl_context *ctx, GLsizei width, GLsizei height, 261 const struct gl_pixelstore_attrib *unpack, 262 const GLubyte *bitmap) 263{ 264 struct st_context *st = st_context(ctx); 265 struct pipe_context *pipe = st->pipe; 266 struct pipe_transfer *transfer; 267 ubyte *dest; 268 struct pipe_resource *pt; 269 270 /* PBO source... */ 271 bitmap = _mesa_map_pbo_source(ctx, unpack, bitmap); 272 if (!bitmap) { 273 return NULL; 274 } 275 276 /** 277 * Create texture to hold bitmap pattern. 278 */ 279 pt = st_texture_create(st, st->internal_target, st->bitmap.tex_format, 280 0, width, height, 1, 1, 281 PIPE_BIND_SAMPLER_VIEW); 282 if (!pt) { 283 _mesa_unmap_pbo_source(ctx, unpack); 284 return NULL; 285 } 286 287 transfer = pipe_get_transfer(st->pipe, pt, 0, 0, 288 PIPE_TRANSFER_WRITE, 289 0, 0, width, height); 290 291 dest = pipe_transfer_map(pipe, transfer); 292 293 /* Put image into texture transfer */ 294 memset(dest, 0xff, height * transfer->stride); 295 unpack_bitmap(st, 0, 0, width, height, unpack, bitmap, 296 dest, transfer->stride); 297 298 _mesa_unmap_pbo_source(ctx, unpack); 299 300 /* Release transfer */ 301 pipe_transfer_unmap(pipe, transfer); 302 pipe->transfer_destroy(pipe, transfer); 303 304 return pt; 305} 306 307static GLuint 308setup_bitmap_vertex_data(struct st_context *st, bool normalized, 309 int x, int y, int width, int height, 310 float z, const float color[4]) 311{ 312 struct pipe_context *pipe = st->pipe; 313 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 314 const GLfloat fb_width = (GLfloat)fb->Width; 315 const GLfloat fb_height = (GLfloat)fb->Height; 316 const GLfloat x0 = (GLfloat)x; 317 const GLfloat x1 = (GLfloat)(x + width); 318 const GLfloat y0 = (GLfloat)y; 319 const GLfloat y1 = (GLfloat)(y + height); 320 GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 321 GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop; 322 const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); 323 const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); 324 const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); 325 const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); 326 const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ 327 GLuint i; 328 329 if(!normalized) 330 { 331 sRight = width; 332 tBot = height; 333 } 334 335 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as 336 * no_flush) updates to buffers where we know there is no conflict 337 * with previous data. Currently using max_slots > 1 will cause 338 * synchronous rendering if the driver flushes its command buffers 339 * between one bitmap and the next. Our flush hook below isn't 340 * sufficient to catch this as the driver doesn't tell us when it 341 * flushes its own command buffers. Until this gets fixed, pay the 342 * price of allocating a new buffer for each bitmap cache-flush to 343 * avoid synchronous rendering. 344 */ 345 if (st->bitmap.vbuf_slot >= max_slots) { 346 pipe_resource_reference(&st->bitmap.vbuf, NULL); 347 st->bitmap.vbuf_slot = 0; 348 } 349 350 if (!st->bitmap.vbuf) { 351 st->bitmap.vbuf = pipe_buffer_create(pipe->screen, 352 PIPE_BIND_VERTEX_BUFFER, 353 PIPE_USAGE_STREAM, 354 max_slots * 355 sizeof(st->bitmap.vertices)); 356 } 357 358 /* Positions are in clip coords since we need to do clipping in case 359 * the bitmap quad goes beyond the window bounds. 360 */ 361 st->bitmap.vertices[0][0][0] = clip_x0; 362 st->bitmap.vertices[0][0][1] = clip_y0; 363 st->bitmap.vertices[0][2][0] = sLeft; 364 st->bitmap.vertices[0][2][1] = tTop; 365 366 st->bitmap.vertices[1][0][0] = clip_x1; 367 st->bitmap.vertices[1][0][1] = clip_y0; 368 st->bitmap.vertices[1][2][0] = sRight; 369 st->bitmap.vertices[1][2][1] = tTop; 370 371 st->bitmap.vertices[2][0][0] = clip_x1; 372 st->bitmap.vertices[2][0][1] = clip_y1; 373 st->bitmap.vertices[2][2][0] = sRight; 374 st->bitmap.vertices[2][2][1] = tBot; 375 376 st->bitmap.vertices[3][0][0] = clip_x0; 377 st->bitmap.vertices[3][0][1] = clip_y1; 378 st->bitmap.vertices[3][2][0] = sLeft; 379 st->bitmap.vertices[3][2][1] = tBot; 380 381 /* same for all verts: */ 382 for (i = 0; i < 4; i++) { 383 st->bitmap.vertices[i][0][2] = z; 384 st->bitmap.vertices[i][0][3] = 1.0; 385 st->bitmap.vertices[i][1][0] = color[0]; 386 st->bitmap.vertices[i][1][1] = color[1]; 387 st->bitmap.vertices[i][1][2] = color[2]; 388 st->bitmap.vertices[i][1][3] = color[3]; 389 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 390 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 391 } 392 393 /* put vertex data into vbuf */ 394 pipe_buffer_write_nooverlap(st->pipe, 395 st->bitmap.vbuf, 396 st->bitmap.vbuf_slot 397 * sizeof(st->bitmap.vertices), 398 sizeof st->bitmap.vertices, 399 st->bitmap.vertices); 400 401 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 402} 403 404 405 406/** 407 * Render a glBitmap by drawing a textured quad 408 */ 409static void 410draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, 411 GLsizei width, GLsizei height, 412 struct pipe_sampler_view *sv, 413 const GLfloat *color) 414{ 415 struct st_context *st = st_context(ctx); 416 struct pipe_context *pipe = st->pipe; 417 struct cso_context *cso = st->cso_context; 418 struct st_fp_variant *fpv; 419 struct st_fp_variant_key key; 420 GLuint maxSize; 421 GLuint offset; 422 423 memset(&key, 0, sizeof(key)); 424 key.st = st; 425 key.bitmap = GL_TRUE; 426 427 fpv = st_get_fp_variant(st, st->fp, &key); 428 429 /* As an optimization, Mesa's fragment programs will sometimes get the 430 * primary color from a statevar/constant rather than a varying variable. 431 * when that's the case, we need to ensure that we use the 'color' 432 * parameter and not the current attribute color (which may have changed 433 * through glRasterPos and state validation. 434 * So, we force the proper color here. Not elegant, but it works. 435 */ 436 { 437 GLfloat colorSave[4]; 438 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 439 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 440 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); 441 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 442 } 443 444 445 /* limit checks */ 446 /* XXX if the bitmap is larger than the max texture size, break 447 * it up into chunks. 448 */ 449 maxSize = 1 << (pipe->screen->get_param(pipe->screen, 450 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 451 assert(width <= (GLsizei)maxSize); 452 assert(height <= (GLsizei)maxSize); 453 454 cso_save_rasterizer(cso); 455 cso_save_samplers(cso); 456 cso_save_fragment_sampler_views(cso); 457 cso_save_viewport(cso); 458 cso_save_fragment_shader(cso); 459 cso_save_vertex_shader(cso); 460 cso_save_vertex_elements(cso); 461 cso_save_vertex_buffers(cso); 462 463 /* rasterizer state: just scissor */ 464 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 465 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 466 467 /* fragment shader state: TEX lookup program */ 468 cso_set_fragment_shader_handle(cso, fpv->driver_shader); 469 470 /* vertex shader state: position + texcoord pass-through */ 471 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 472 473 /* user samplers, plus our bitmap sampler */ 474 { 475 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 476 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_samplers); 477 uint i; 478 for (i = 0; i < st->state.num_samplers; i++) { 479 samplers[i] = &st->state.samplers[i]; 480 } 481 samplers[fpv->bitmap_sampler] = 482 &st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT]; 483 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 484 } 485 486 /* user textures, plus the bitmap texture */ 487 { 488 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 489 uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_textures); 490 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 491 sampler_views[fpv->bitmap_sampler] = sv; 492 cso_set_fragment_sampler_views(cso, num, sampler_views); 493 } 494 495 /* viewport state: viewport matching window dims */ 496 { 497 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 498 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 499 const GLfloat width = (GLfloat)fb->Width; 500 const GLfloat height = (GLfloat)fb->Height; 501 struct pipe_viewport_state vp; 502 vp.scale[0] = 0.5f * width; 503 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 504 vp.scale[2] = 0.5f; 505 vp.scale[3] = 1.0f; 506 vp.translate[0] = 0.5f * width; 507 vp.translate[1] = 0.5f * height; 508 vp.translate[2] = 0.5f; 509 vp.translate[3] = 0.0f; 510 cso_set_viewport(cso, &vp); 511 } 512 513 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 514 515 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 516 z = z * 2.0 - 1.0; 517 518 /* draw textured quad */ 519 offset = setup_bitmap_vertex_data(st, 520 sv->texture->target != PIPE_TEXTURE_RECT, 521 x, y, width, height, z, color); 522 523 util_draw_vertex_buffer(pipe, st->cso_context, st->bitmap.vbuf, offset, 524 PIPE_PRIM_TRIANGLE_FAN, 525 4, /* verts */ 526 3); /* attribs/vert */ 527 528 529 /* restore state */ 530 cso_restore_rasterizer(cso); 531 cso_restore_samplers(cso); 532 cso_restore_fragment_sampler_views(cso); 533 cso_restore_viewport(cso); 534 cso_restore_fragment_shader(cso); 535 cso_restore_vertex_shader(cso); 536 cso_restore_vertex_elements(cso); 537 cso_restore_vertex_buffers(cso); 538} 539 540 541static void 542reset_cache(struct st_context *st) 543{ 544 struct pipe_context *pipe = st->pipe; 545 struct bitmap_cache *cache = st->bitmap.cache; 546 547 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ 548 cache->empty = GL_TRUE; 549 550 cache->xmin = 1000000; 551 cache->xmax = -1000000; 552 cache->ymin = 1000000; 553 cache->ymax = -1000000; 554 555 if (cache->trans) { 556 pipe->transfer_destroy(pipe, cache->trans); 557 cache->trans = NULL; 558 } 559 560 assert(!cache->texture); 561 562 /* allocate a new texture */ 563 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 564 st->bitmap.tex_format, 0, 565 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 566 1, 1, 567 PIPE_BIND_SAMPLER_VIEW); 568} 569 570 571/** Print bitmap image to stdout (debug) */ 572static void 573print_cache(const struct bitmap_cache *cache) 574{ 575 int i, j, k; 576 577 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 578 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 579 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 580 if (cache->buffer[k]) 581 printf("X"); 582 else 583 printf(" "); 584 k++; 585 } 586 printf("\n"); 587 } 588} 589 590 591/** 592 * Create gallium pipe_transfer object for the bitmap cache. 593 */ 594static void 595create_cache_trans(struct st_context *st) 596{ 597 struct pipe_context *pipe = st->pipe; 598 struct bitmap_cache *cache = st->bitmap.cache; 599 600 if (cache->trans) 601 return; 602 603 /* Map the texture transfer. 604 * Subsequent glBitmap calls will write into the texture image. 605 */ 606 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 607 PIPE_TRANSFER_WRITE, 0, 0, 608 BITMAP_CACHE_WIDTH, 609 BITMAP_CACHE_HEIGHT); 610 cache->buffer = pipe_transfer_map(pipe, cache->trans); 611 612 /* init image to all 0xff */ 613 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 614} 615 616 617/** 618 * If there's anything in the bitmap cache, draw/flush it now. 619 */ 620void 621st_flush_bitmap_cache(struct st_context *st) 622{ 623 if (!st->bitmap.cache->empty) { 624 struct bitmap_cache *cache = st->bitmap.cache; 625 626 if (st->ctx->DrawBuffer) { 627 struct pipe_context *pipe = st->pipe; 628 struct pipe_sampler_view *sv; 629 630 assert(cache->xmin <= cache->xmax); 631 632/* printf("flush size %d x %d at %d, %d\n", 633 cache->xmax - cache->xmin, 634 cache->ymax - cache->ymin, 635 cache->xpos, cache->ypos); 636*/ 637 638 /* The texture transfer has been mapped until now. 639 * So unmap and release the texture transfer before drawing. 640 */ 641 if (cache->trans) { 642 if (0) 643 print_cache(cache); 644 pipe_transfer_unmap(pipe, cache->trans); 645 cache->buffer = NULL; 646 647 pipe->transfer_destroy(pipe, cache->trans); 648 cache->trans = NULL; 649 } 650 651 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 652 if (sv) { 653 draw_bitmap_quad(st->ctx, 654 cache->xpos, 655 cache->ypos, 656 cache->zpos, 657 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 658 sv, 659 cache->color); 660 661 pipe_sampler_view_reference(&sv, NULL); 662 } 663 } 664 665 /* release/free the texture */ 666 pipe_resource_reference(&cache->texture, NULL); 667 668 reset_cache(st); 669 } 670} 671 672 673/** 674 * Flush bitmap cache and release vertex buffer. 675 */ 676void 677st_flush_bitmap( struct st_context *st ) 678{ 679 st_flush_bitmap_cache(st); 680 681 /* Release vertex buffer to avoid synchronous rendering if we were 682 * to map it in the next frame. 683 */ 684 pipe_resource_reference(&st->bitmap.vbuf, NULL); 685 st->bitmap.vbuf_slot = 0; 686} 687 688 689/** 690 * Try to accumulate this glBitmap call in the bitmap cache. 691 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 692 */ 693static GLboolean 694accum_bitmap(struct st_context *st, 695 GLint x, GLint y, GLsizei width, GLsizei height, 696 const struct gl_pixelstore_attrib *unpack, 697 const GLubyte *bitmap ) 698{ 699 struct bitmap_cache *cache = st->bitmap.cache; 700 int px = -999, py = -999; 701 const GLfloat z = st->ctx->Current.RasterPos[2]; 702 703 if (width > BITMAP_CACHE_WIDTH || 704 height > BITMAP_CACHE_HEIGHT) 705 return GL_FALSE; /* too big to cache */ 706 707 if (!cache->empty) { 708 px = x - cache->xpos; /* pos in buffer */ 709 py = y - cache->ypos; 710 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 711 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 712 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 713 ((fabs(z - cache->zpos) > Z_EPSILON))) { 714 /* This bitmap would extend beyond cache bounds, or the bitmap 715 * color is changing 716 * so flush and continue. 717 */ 718 st_flush_bitmap_cache(st); 719 } 720 } 721 722 if (cache->empty) { 723 /* Initialize. Center bitmap vertically in the buffer. */ 724 px = 0; 725 py = (BITMAP_CACHE_HEIGHT - height) / 2; 726 cache->xpos = x; 727 cache->ypos = y - py; 728 cache->zpos = z; 729 cache->empty = GL_FALSE; 730 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 731 } 732 733 assert(px != -999); 734 assert(py != -999); 735 736 if (x < cache->xmin) 737 cache->xmin = x; 738 if (y < cache->ymin) 739 cache->ymin = y; 740 if (x + width > cache->xmax) 741 cache->xmax = x + width; 742 if (y + height > cache->ymax) 743 cache->ymax = y + height; 744 745 /* create the transfer if needed */ 746 create_cache_trans(st); 747 748 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 749 cache->buffer, BITMAP_CACHE_WIDTH); 750 751 return GL_TRUE; /* accumulated */ 752} 753 754 755 756/** 757 * Called via ctx->Driver.Bitmap() 758 */ 759static void 760st_Bitmap(struct gl_context *ctx, GLint x, GLint y, 761 GLsizei width, GLsizei height, 762 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 763{ 764 struct st_context *st = st_context(ctx); 765 struct pipe_resource *pt; 766 767 if (width == 0 || height == 0) 768 return; 769 770 st_validate_state(st); 771 772 if (!st->bitmap.vs) { 773 /* create pass-through vertex shader now */ 774 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 775 TGSI_SEMANTIC_COLOR, 776 TGSI_SEMANTIC_GENERIC }; 777 const uint semantic_indexes[] = { 0, 0, 0 }; 778 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 779 semantic_names, 780 semantic_indexes); 781 } 782 783 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 784 return; 785 786 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 787 if (pt) { 788 struct pipe_sampler_view *sv = 789 st_create_texture_sampler_view(st->pipe, pt); 790 791 assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); 792 793 if (sv) { 794 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 795 width, height, sv, 796 st->ctx->Current.RasterColor); 797 798 pipe_sampler_view_reference(&sv, NULL); 799 } 800 801 /* release/free the texture */ 802 pipe_resource_reference(&pt, NULL); 803 } 804} 805 806 807/** Per-context init */ 808void 809st_init_bitmap_functions(struct dd_function_table *functions) 810{ 811 functions->Bitmap = st_Bitmap; 812} 813 814 815/** Per-context init */ 816void 817st_init_bitmap(struct st_context *st) 818{ 819 struct pipe_sampler_state *sampler = &st->bitmap.samplers[0]; 820 struct pipe_context *pipe = st->pipe; 821 struct pipe_screen *screen = pipe->screen; 822 823 /* init sampler state once */ 824 memset(sampler, 0, sizeof(*sampler)); 825 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 826 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 827 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 828 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 829 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 830 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 831 st->bitmap.samplers[1] = *sampler; 832 st->bitmap.samplers[1].normalized_coords = 1; 833 834 /* init baseline rasterizer state once */ 835 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 836 st->bitmap.rasterizer.gl_rasterization_rules = 1; 837 838 /* find a usable texture format */ 839 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, 840 PIPE_TEXTURE_2D, 0, 841 PIPE_BIND_SAMPLER_VIEW)) { 842 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 843 } 844 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, 845 PIPE_TEXTURE_2D, 0, 846 PIPE_BIND_SAMPLER_VIEW)) { 847 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 848 } 849 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, 850 PIPE_TEXTURE_2D, 0, 851 PIPE_BIND_SAMPLER_VIEW)) { 852 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 853 } 854 else { 855 /* XXX support more formats */ 856 assert(0); 857 } 858 859 /* alloc bitmap cache object */ 860 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 861 862 reset_cache(st); 863} 864 865 866/** Per-context tear-down */ 867void 868st_destroy_bitmap(struct st_context *st) 869{ 870 struct pipe_context *pipe = st->pipe; 871 struct bitmap_cache *cache = st->bitmap.cache; 872 873 if (st->bitmap.vs) { 874 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 875 st->bitmap.vs = NULL; 876 } 877 878 if (st->bitmap.vbuf) { 879 pipe_resource_reference(&st->bitmap.vbuf, NULL); 880 st->bitmap.vbuf = NULL; 881 } 882 883 if (cache) { 884 if (cache->trans) { 885 pipe_transfer_unmap(pipe, cache->trans); 886 pipe->transfer_destroy(pipe, cache->trans); 887 } 888 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 889 free(st->bitmap.cache); 890 st->bitmap.cache = NULL; 891 } 892} 893 894#endif /* FEATURE_drawpix */ 895