st_cb_bitmap.c revision ec2b92f98c2e7f161521b447cc1d9a36bce3707c
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 "util/u_inlines.h" 50#include "util/u_draw_quad.h" 51#include "util/u_simple_shaders.h" 52#include "program/prog_instruction.h" 53#include "cso_cache/cso_context.h" 54 55 56#if FEATURE_drawpix 57 58/** 59 * glBitmaps are drawn as textured quads. The user's bitmap pattern 60 * is stored in a texture image. An alpha8 texture format is used. 61 * The fragment shader samples a bit (texel) from the texture, then 62 * discards the fragment if the bit is off. 63 * 64 * Note that we actually store the inverse image of the bitmap to 65 * simplify the fragment program. An "on" bit gets stored as texel=0x0 66 * and an "off" bit is stored as texel=0xff. Then we kill the 67 * fragment if the negated texel value is less than zero. 68 */ 69 70 71/** 72 * The bitmap cache attempts to accumulate multiple glBitmap calls in a 73 * buffer which is then rendered en mass upon a flush, state change, etc. 74 * A wide, short buffer is used to target the common case of a series 75 * of glBitmap calls being used to draw text. 76 */ 77static GLboolean UseBitmapCache = GL_TRUE; 78 79 80#define BITMAP_CACHE_WIDTH 512 81#define BITMAP_CACHE_HEIGHT 32 82 83struct bitmap_cache 84{ 85 /** Window pos to render the cached image */ 86 GLint xpos, ypos; 87 /** Bounds of region used in window coords */ 88 GLint xmin, ymin, xmax, ymax; 89 90 GLfloat color[4]; 91 92 /** Bitmap's Z position */ 93 GLfloat zpos; 94 95 struct pipe_resource *texture; 96 struct pipe_transfer *trans; 97 98 GLboolean empty; 99 100 /** An I8 texture image: */ 101 ubyte *buffer; 102}; 103 104 105/** Epsilon for Z comparisons */ 106#define Z_EPSILON 1e-06 107 108 109/** 110 * Make fragment program for glBitmap: 111 * Sample the texture and kill the fragment if the bit is 0. 112 * This program will be combined with the user's fragment program. 113 */ 114static struct st_fragment_program * 115make_bitmap_fragment_program(GLcontext *ctx, GLuint samplerIndex) 116{ 117 struct st_context *st = st_context(ctx); 118 struct st_fragment_program *stfp; 119 struct gl_program *p; 120 GLuint ic = 0; 121 122 p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); 123 if (!p) 124 return NULL; 125 126 p->NumInstructions = 3; 127 128 p->Instructions = _mesa_alloc_instructions(p->NumInstructions); 129 if (!p->Instructions) { 130 ctx->Driver.DeleteProgram(ctx, p); 131 return NULL; 132 } 133 _mesa_init_instructions(p->Instructions, p->NumInstructions); 134 135 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ 136 p->Instructions[ic].Opcode = OPCODE_TEX; 137 p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; 138 p->Instructions[ic].DstReg.Index = 0; 139 p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; 140 p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; 141 p->Instructions[ic].TexSrcUnit = samplerIndex; 142 p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; 143 ic++; 144 145 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ 146 p->Instructions[ic].Opcode = OPCODE_KIL; 147 p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; 148 149 if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM) 150 p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_XXXX; 151 152 p->Instructions[ic].SrcReg[0].Index = 0; 153 p->Instructions[ic].SrcReg[0].Negate = NEGATE_XYZW; 154 ic++; 155 156 /* END; */ 157 p->Instructions[ic++].Opcode = OPCODE_END; 158 159 assert(ic == p->NumInstructions); 160 161 p->InputsRead = FRAG_BIT_TEX0; 162 p->OutputsWritten = 0x0; 163 p->SamplersUsed = (1 << samplerIndex); 164 165 stfp = (struct st_fragment_program *) p; 166 stfp->Base.UsesKill = GL_TRUE; 167 168 return stfp; 169} 170 171 172static int 173find_free_bit(uint bitfield) 174{ 175 int i; 176 for (i = 0; i < 32; i++) { 177 if ((bitfield & (1 << i)) == 0) { 178 return i; 179 } 180 } 181 return -1; 182} 183 184 185/** 186 * Combine basic bitmap fragment program with the user-defined program. 187 */ 188static struct st_fragment_program * 189combined_bitmap_fragment_program(GLcontext *ctx) 190{ 191 struct st_context *st = st_context(ctx); 192 struct st_fragment_program *stfp = st->fp; 193 194 if (!stfp->bitmap_program) { 195 /* 196 * Generate new program which is the user-defined program prefixed 197 * with the bitmap sampler/kill instructions. 198 */ 199 struct st_fragment_program *bitmap_prog; 200 uint sampler; 201 202 sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); 203 bitmap_prog = make_bitmap_fragment_program(ctx, sampler); 204 205 stfp->bitmap_program = (struct st_fragment_program *) 206 _mesa_combine_programs(ctx, 207 &bitmap_prog->Base.Base, &stfp->Base.Base); 208 stfp->bitmap_program->bitmap_sampler = sampler; 209 210 /* done with this after combining */ 211 st_reference_fragprog(st, &bitmap_prog, NULL); 212 213#if 0 214 { 215 struct gl_program *p = &stfp->bitmap_program->Base.Base; 216 printf("Combined bitmap program:\n"); 217 _mesa_print_program(p); 218 printf("InputsRead: 0x%x\n", p->InputsRead); 219 printf("OutputsWritten: 0x%x\n", p->OutputsWritten); 220 _mesa_print_parameter_list(p->Parameters); 221 } 222#endif 223 224 /* translate to TGSI tokens */ 225 st_translate_fragment_program(st, stfp->bitmap_program); 226 } 227 228 return stfp->bitmap_program; 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(GLcontext *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, PIPE_TEXTURE_2D, 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, 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, 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 const GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; 319 const 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); 324 325 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as 326 * no_flush) updates to buffers where we know there is no conflict 327 * with previous data. Currently using max_slots > 1 will cause 328 * synchronous rendering if the driver flushes its command buffers 329 * between one bitmap and the next. Our flush hook below isn't 330 * sufficient to catch this as the driver doesn't tell us when it 331 * flushes its own command buffers. Until this gets fixed, pay the 332 * price of allocating a new buffer for each bitmap cache-flush to 333 * avoid synchronous rendering. 334 */ 335 const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ 336 GLuint i; 337 338 if (st->bitmap.vbuf_slot >= max_slots) { 339 pipe_resource_reference(&st->bitmap.vbuf, NULL); 340 st->bitmap.vbuf_slot = 0; 341 } 342 343 if (!st->bitmap.vbuf) { 344 st->bitmap.vbuf = pipe_buffer_create(pipe->screen, 345 PIPE_BIND_VERTEX_BUFFER, 346 max_slots * sizeof(st->bitmap.vertices)); 347 } 348 349 /* Positions are in clip coords since we need to do clipping in case 350 * the bitmap quad goes beyond the window bounds. 351 */ 352 st->bitmap.vertices[0][0][0] = clip_x0; 353 st->bitmap.vertices[0][0][1] = clip_y0; 354 st->bitmap.vertices[0][2][0] = sLeft; 355 st->bitmap.vertices[0][2][1] = tTop; 356 357 st->bitmap.vertices[1][0][0] = clip_x1; 358 st->bitmap.vertices[1][0][1] = clip_y0; 359 st->bitmap.vertices[1][2][0] = sRight; 360 st->bitmap.vertices[1][2][1] = tTop; 361 362 st->bitmap.vertices[2][0][0] = clip_x1; 363 st->bitmap.vertices[2][0][1] = clip_y1; 364 st->bitmap.vertices[2][2][0] = sRight; 365 st->bitmap.vertices[2][2][1] = tBot; 366 367 st->bitmap.vertices[3][0][0] = clip_x0; 368 st->bitmap.vertices[3][0][1] = clip_y1; 369 st->bitmap.vertices[3][2][0] = sLeft; 370 st->bitmap.vertices[3][2][1] = tBot; 371 372 /* same for all verts: */ 373 for (i = 0; i < 4; i++) { 374 st->bitmap.vertices[i][0][2] = z; 375 st->bitmap.vertices[i][0][3] = 1.0; 376 st->bitmap.vertices[i][1][0] = color[0]; 377 st->bitmap.vertices[i][1][1] = color[1]; 378 st->bitmap.vertices[i][1][2] = color[2]; 379 st->bitmap.vertices[i][1][3] = color[3]; 380 st->bitmap.vertices[i][2][2] = 0.0; /*R*/ 381 st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ 382 } 383 384 /* put vertex data into vbuf */ 385 pipe_buffer_write_nooverlap(st->pipe, 386 st->bitmap.vbuf, 387 st->bitmap.vbuf_slot * sizeof st->bitmap.vertices, 388 sizeof st->bitmap.vertices, 389 st->bitmap.vertices); 390 391 return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; 392} 393 394 395 396/** 397 * Render a glBitmap by drawing a textured quad 398 */ 399static void 400draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, 401 GLsizei width, GLsizei height, 402 struct pipe_sampler_view *sv, 403 const GLfloat *color) 404{ 405 struct st_context *st = st_context(ctx); 406 struct pipe_context *pipe = st->pipe; 407 struct cso_context *cso = st->cso_context; 408 struct st_fragment_program *stfp; 409 GLuint maxSize; 410 GLuint offset; 411 412 stfp = combined_bitmap_fragment_program(ctx); 413 414 /* As an optimization, Mesa's fragment programs will sometimes get the 415 * primary color from a statevar/constant rather than a varying variable. 416 * when that's the case, we need to ensure that we use the 'color' 417 * parameter and not the current attribute color (which may have changed 418 * through glRasterPos and state validation. 419 * So, we force the proper color here. Not elegant, but it works. 420 */ 421 { 422 GLfloat colorSave[4]; 423 COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); 424 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); 425 st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); 426 COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); 427 } 428 429 430 /* limit checks */ 431 /* XXX if the bitmap is larger than the max texture size, break 432 * it up into chunks. 433 */ 434 maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); 435 assert(width <= (GLsizei)maxSize); 436 assert(height <= (GLsizei)maxSize); 437 438 cso_save_rasterizer(cso); 439 cso_save_samplers(cso); 440 cso_save_fragment_sampler_views(cso); 441 cso_save_viewport(cso); 442 cso_save_fragment_shader(cso); 443 cso_save_vertex_shader(cso); 444 cso_save_vertex_elements(cso); 445 446 /* rasterizer state: just scissor */ 447 st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; 448 cso_set_rasterizer(cso, &st->bitmap.rasterizer); 449 450 /* fragment shader state: TEX lookup program */ 451 cso_set_fragment_shader_handle(cso, stfp->driver_shader); 452 453 /* vertex shader state: position + texcoord pass-through */ 454 cso_set_vertex_shader_handle(cso, st->bitmap.vs); 455 456 /* user samplers, plus our bitmap sampler */ 457 { 458 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; 459 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); 460 uint i; 461 for (i = 0; i < st->state.num_samplers; i++) { 462 samplers[i] = &st->state.samplers[i]; 463 } 464 samplers[stfp->bitmap_sampler] = &st->bitmap.sampler; 465 cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); 466 } 467 468 /* user textures, plus the bitmap texture */ 469 { 470 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 471 uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); 472 memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); 473 sampler_views[stfp->bitmap_sampler] = sv; 474 cso_set_fragment_sampler_views(cso, num, sampler_views); 475 } 476 477 /* viewport state: viewport matching window dims */ 478 { 479 const struct gl_framebuffer *fb = st->ctx->DrawBuffer; 480 const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); 481 const GLfloat width = (GLfloat)fb->Width; 482 const GLfloat height = (GLfloat)fb->Height; 483 struct pipe_viewport_state vp; 484 vp.scale[0] = 0.5f * width; 485 vp.scale[1] = height * (invert ? -0.5f : 0.5f); 486 vp.scale[2] = 0.5f; 487 vp.scale[3] = 1.0f; 488 vp.translate[0] = 0.5f * width; 489 vp.translate[1] = 0.5f * height; 490 vp.translate[2] = 0.5f; 491 vp.translate[3] = 0.0f; 492 cso_set_viewport(cso, &vp); 493 } 494 495 cso_set_vertex_elements(cso, 3, st->velems_util_draw); 496 497 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ 498 z = z * 2.0 - 1.0; 499 500 /* draw textured quad */ 501 offset = setup_bitmap_vertex_data(st, x, y, width, height, z, color); 502 503 util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, 504 PIPE_PRIM_TRIANGLE_FAN, 505 4, /* verts */ 506 3); /* attribs/vert */ 507 508 509 /* restore state */ 510 cso_restore_rasterizer(cso); 511 cso_restore_samplers(cso); 512 cso_restore_fragment_sampler_views(cso); 513 cso_restore_viewport(cso); 514 cso_restore_fragment_shader(cso); 515 cso_restore_vertex_shader(cso); 516 cso_restore_vertex_elements(cso); 517} 518 519 520static void 521reset_cache(struct st_context *st) 522{ 523 struct pipe_context *pipe = st->pipe; 524 struct bitmap_cache *cache = st->bitmap.cache; 525 526 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ 527 cache->empty = GL_TRUE; 528 529 cache->xmin = 1000000; 530 cache->xmax = -1000000; 531 cache->ymin = 1000000; 532 cache->ymax = -1000000; 533 534 if (cache->trans) { 535 pipe->transfer_destroy(pipe, cache->trans); 536 cache->trans = NULL; 537 } 538 539 assert(!cache->texture); 540 541 /* allocate a new texture */ 542 cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, 543 st->bitmap.tex_format, 0, 544 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 545 1, 546 PIPE_BIND_SAMPLER_VIEW); 547} 548 549 550/** Print bitmap image to stdout (debug) */ 551static void 552print_cache(const struct bitmap_cache *cache) 553{ 554 int i, j, k; 555 556 for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { 557 k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); 558 for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { 559 if (cache->buffer[k]) 560 printf("X"); 561 else 562 printf(" "); 563 k++; 564 } 565 printf("\n"); 566 } 567} 568 569 570static void 571create_cache_trans(struct st_context *st) 572{ 573 struct pipe_context *pipe = st->pipe; 574 struct bitmap_cache *cache = st->bitmap.cache; 575 576 if (cache->trans) 577 return; 578 579 /* Map the texture transfer. 580 * Subsequent glBitmap calls will write into the texture image. 581 */ 582 cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, 0, 583 PIPE_TRANSFER_WRITE, 0, 0, 584 BITMAP_CACHE_WIDTH, 585 BITMAP_CACHE_HEIGHT); 586 cache->buffer = pipe_transfer_map(pipe, cache->trans); 587 588 /* init image to all 0xff */ 589 memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); 590} 591 592 593/** 594 * If there's anything in the bitmap cache, draw/flush it now. 595 */ 596void 597st_flush_bitmap_cache(struct st_context *st) 598{ 599 if (!st->bitmap.cache->empty) { 600 struct bitmap_cache *cache = st->bitmap.cache; 601 602 if (st->ctx->DrawBuffer) { 603 struct pipe_context *pipe = st->pipe; 604 struct pipe_sampler_view *sv; 605 606 assert(cache->xmin <= cache->xmax); 607 608/* printf("flush size %d x %d at %d, %d\n", 609 cache->xmax - cache->xmin, 610 cache->ymax - cache->ymin, 611 cache->xpos, cache->ypos); 612*/ 613 614 /* The texture transfer has been mapped until now. 615 * So unmap and release the texture transfer before drawing. 616 */ 617 if (cache->trans) { 618 if (0) 619 print_cache(cache); 620 pipe_transfer_unmap(pipe, cache->trans); 621 cache->buffer = NULL; 622 623 pipe->transfer_destroy(pipe, cache->trans); 624 cache->trans = NULL; 625 } 626 627 sv = st_create_texture_sampler_view(st->pipe, cache->texture); 628 if (sv) { 629 draw_bitmap_quad(st->ctx, 630 cache->xpos, 631 cache->ypos, 632 cache->zpos, 633 BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, 634 sv, 635 cache->color); 636 637 pipe_sampler_view_reference(&sv, NULL); 638 } 639 } 640 641 /* release/free the texture */ 642 pipe_resource_reference(&cache->texture, NULL); 643 644 reset_cache(st); 645 } 646} 647 648/* Flush bitmap cache and release vertex buffer. 649 */ 650void 651st_flush_bitmap( struct st_context *st ) 652{ 653 st_flush_bitmap_cache(st); 654 655 /* Release vertex buffer to avoid synchronous rendering if we were 656 * to map it in the next frame. 657 */ 658 pipe_resource_reference(&st->bitmap.vbuf, NULL); 659 st->bitmap.vbuf_slot = 0; 660} 661 662 663/** 664 * Try to accumulate this glBitmap call in the bitmap cache. 665 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. 666 */ 667static GLboolean 668accum_bitmap(struct st_context *st, 669 GLint x, GLint y, GLsizei width, GLsizei height, 670 const struct gl_pixelstore_attrib *unpack, 671 const GLubyte *bitmap ) 672{ 673 struct bitmap_cache *cache = st->bitmap.cache; 674 int px = -999, py = -999; 675 const GLfloat z = st->ctx->Current.RasterPos[2]; 676 677 if (width > BITMAP_CACHE_WIDTH || 678 height > BITMAP_CACHE_HEIGHT) 679 return GL_FALSE; /* too big to cache */ 680 681 if (!cache->empty) { 682 px = x - cache->xpos; /* pos in buffer */ 683 py = y - cache->ypos; 684 if (px < 0 || px + width > BITMAP_CACHE_WIDTH || 685 py < 0 || py + height > BITMAP_CACHE_HEIGHT || 686 !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || 687 ((fabs(z - cache->zpos) > Z_EPSILON))) { 688 /* This bitmap would extend beyond cache bounds, or the bitmap 689 * color is changing 690 * so flush and continue. 691 */ 692 st_flush_bitmap_cache(st); 693 } 694 } 695 696 if (cache->empty) { 697 /* Initialize. Center bitmap vertically in the buffer. */ 698 px = 0; 699 py = (BITMAP_CACHE_HEIGHT - height) / 2; 700 cache->xpos = x; 701 cache->ypos = y - py; 702 cache->zpos = z; 703 cache->empty = GL_FALSE; 704 COPY_4FV(cache->color, st->ctx->Current.RasterColor); 705 } 706 707 assert(px != -999); 708 assert(py != -999); 709 710 if (x < cache->xmin) 711 cache->xmin = x; 712 if (y < cache->ymin) 713 cache->ymin = y; 714 if (x + width > cache->xmax) 715 cache->xmax = x + width; 716 if (y + height > cache->ymax) 717 cache->ymax = y + height; 718 719 /* create the transfer if needed */ 720 create_cache_trans(st); 721 722 unpack_bitmap(st, px, py, width, height, unpack, bitmap, 723 cache->buffer, BITMAP_CACHE_WIDTH); 724 725 return GL_TRUE; /* accumulated */ 726} 727 728 729 730/** 731 * Called via ctx->Driver.Bitmap() 732 */ 733static void 734st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, 735 const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) 736{ 737 struct st_context *st = st_context(ctx); 738 struct pipe_resource *pt; 739 740 if (width == 0 || height == 0) 741 return; 742 743 st_validate_state(st); 744 745 if (!st->bitmap.vs) { 746 /* create pass-through vertex shader now */ 747 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, 748 TGSI_SEMANTIC_COLOR, 749 TGSI_SEMANTIC_GENERIC }; 750 const uint semantic_indexes[] = { 0, 0, 0 }; 751 st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, 752 semantic_names, 753 semantic_indexes); 754 } 755 756 if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) 757 return; 758 759 pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); 760 if (pt) { 761 struct pipe_sampler_view *sv = st_create_texture_sampler_view(st->pipe, pt); 762 763 assert(pt->target == PIPE_TEXTURE_2D); 764 765 if (sv) { 766 draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], 767 width, height, sv, 768 st->ctx->Current.RasterColor); 769 770 pipe_sampler_view_reference(&sv, NULL); 771 } 772 773 /* release/free the texture */ 774 pipe_resource_reference(&pt, NULL); 775 } 776} 777 778 779/** Per-context init */ 780void 781st_init_bitmap_functions(struct dd_function_table *functions) 782{ 783 functions->Bitmap = st_Bitmap; 784} 785 786 787/** Per-context init */ 788void 789st_init_bitmap(struct st_context *st) 790{ 791 struct pipe_sampler_state *sampler = &st->bitmap.sampler; 792 struct pipe_context *pipe = st->pipe; 793 struct pipe_screen *screen = pipe->screen; 794 795 /* init sampler state once */ 796 memset(sampler, 0, sizeof(*sampler)); 797 sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; 798 sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; 799 sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; 800 sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; 801 sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 802 sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; 803 sampler->normalized_coords = 1; 804 805 /* init baseline rasterizer state once */ 806 memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); 807 st->bitmap.rasterizer.gl_rasterization_rules = 1; 808 809 /* find a usable texture format */ 810 if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, 0, 811 PIPE_BIND_SAMPLER_VIEW, 0)) { 812 st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; 813 } 814 else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, PIPE_TEXTURE_2D, 0, 815 PIPE_BIND_SAMPLER_VIEW, 0)) { 816 st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; 817 } 818 else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, PIPE_TEXTURE_2D, 0, 819 PIPE_BIND_SAMPLER_VIEW, 0)) { 820 st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; 821 } 822 else { 823 /* XXX support more formats */ 824 assert(0); 825 } 826 827 /* alloc bitmap cache object */ 828 st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); 829 830 reset_cache(st); 831} 832 833 834/** Per-context tear-down */ 835void 836st_destroy_bitmap(struct st_context *st) 837{ 838 struct pipe_context *pipe = st->pipe; 839 struct bitmap_cache *cache = st->bitmap.cache; 840 841 842 843 if (st->bitmap.vs) { 844 cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); 845 st->bitmap.vs = NULL; 846 } 847 848 if (st->bitmap.vbuf) { 849 pipe_resource_reference(&st->bitmap.vbuf, NULL); 850 st->bitmap.vbuf = NULL; 851 } 852 853 if (cache) { 854 if (cache->trans) { 855 pipe_transfer_unmap(pipe, cache->trans); 856 pipe->transfer_destroy(pipe, cache->trans); 857 } 858 pipe_resource_reference(&st->bitmap.cache->texture, NULL); 859 free(st->bitmap.cache); 860 st->bitmap.cache = NULL; 861 } 862} 863 864#endif /* FEATURE_drawpix */ 865