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