intel_pixel_bitmap.c revision 25024d948298a9f3f3210a0b91486f79a3917b0f
1/************************************************************************** 2 * 3 * Copyright 2006 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 portionsalloc 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#include "main/glheader.h" 29#include "main/enums.h" 30#include "main/image.h" 31#include "main/colormac.h" 32#include "main/mtypes.h" 33#include "main/macros.h" 34#include "main/bufferobj.h" 35#include "main/polygon.h" 36#include "main/pixelstore.h" 37#include "main/polygon.h" 38#include "main/state.h" 39#include "main/teximage.h" 40#include "main/texenv.h" 41#include "main/texobj.h" 42#include "main/texstate.h" 43#include "main/texparam.h" 44#include "main/varray.h" 45#include "main/attrib.h" 46#include "main/enable.h" 47#include "main/viewport.h" 48#include "shader/arbprogram.h" 49#include "glapi/dispatch.h" 50#include "swrast/swrast.h" 51 52#include "intel_screen.h" 53#include "intel_context.h" 54#include "intel_batchbuffer.h" 55#include "intel_blit.h" 56#include "intel_regions.h" 57#include "intel_buffer_objects.h" 58#include "intel_buffers.h" 59#include "intel_pixel.h" 60#include "intel_reg.h" 61 62 63#define FILE_DEBUG_FLAG DEBUG_PIXEL 64 65 66/* Unlike the other intel_pixel_* functions, the expectation here is 67 * that the incoming data is not in a PBO. With the XY_TEXT blit 68 * method, there's no benefit haveing it in a PBO, but we could 69 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 70 * PBO bitmaps. I think they are probably pretty rare though - I 71 * wonder if Xgl uses them? 72 */ 73static const GLubyte *map_pbo( GLcontext *ctx, 74 GLsizei width, GLsizei height, 75 const struct gl_pixelstore_attrib *unpack, 76 const GLubyte *bitmap ) 77{ 78 GLubyte *buf; 79 80 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 81 GL_COLOR_INDEX, GL_BITMAP, 82 (GLvoid *) bitmap)) { 83 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 84 return NULL; 85 } 86 87 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 88 GL_READ_ONLY_ARB, 89 unpack->BufferObj); 90 if (!buf) { 91 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 92 return NULL; 93 } 94 95 return ADD_POINTERS(buf, bitmap); 96} 97 98static GLboolean test_bit( const GLubyte *src, GLuint bit ) 99{ 100 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 101} 102 103static void set_bit( GLubyte *dest, GLuint bit ) 104{ 105 dest[bit/8] |= 1 << (bit % 8); 106} 107 108/* Extract a rectangle's worth of data from the bitmap. Called 109 * per-cliprect. 110 */ 111static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 112 const struct gl_pixelstore_attrib *unpack, 113 const GLubyte *bitmap, 114 GLuint x, GLuint y, 115 GLuint w, GLuint h, 116 GLubyte *dest, 117 GLuint row_align, 118 GLboolean invert) 119{ 120 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 121 GLuint mask = unpack->LsbFirst ? 0 : 7; 122 GLuint bit = 0; 123 GLint row, col; 124 GLint first, last; 125 GLint incr; 126 GLuint count = 0; 127 128 if (INTEL_DEBUG & DEBUG_PIXEL) 129 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 130 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 131 132 if (invert) { 133 first = h-1; 134 last = 0; 135 incr = -1; 136 } 137 else { 138 first = 0; 139 last = h-1; 140 incr = 1; 141 } 142 143 /* Require that dest be pre-zero'd. 144 */ 145 for (row = first; row != (last+incr); row += incr) { 146 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 147 width, height, 148 GL_COLOR_INDEX, GL_BITMAP, 149 y + row, x); 150 151 for (col = 0; col < w; col++, bit++) { 152 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 153 set_bit(dest, bit ^ 7); 154 count++; 155 } 156 } 157 158 if (row_align) 159 bit = ALIGN(bit, row_align); 160 } 161 162 return count; 163} 164 165/** 166 * Returns the low Y value of the vertical range given, flipped according to 167 * whether the framebuffer is or not. 168 */ 169static INLINE int 170y_flip(struct gl_framebuffer *fb, int y, int height) 171{ 172 if (fb->Name != 0) 173 return y; 174 else 175 return fb->Height - y - height; 176} 177 178/* 179 * Render a bitmap. 180 */ 181static GLboolean 182do_blit_bitmap( GLcontext *ctx, 183 GLint dstx, GLint dsty, 184 GLsizei width, GLsizei height, 185 const struct gl_pixelstore_attrib *unpack, 186 const GLubyte *bitmap ) 187{ 188 struct intel_context *intel = intel_context(ctx); 189 struct intel_region *dst = intel_drawbuf_region(intel); 190 struct gl_framebuffer *fb = ctx->DrawBuffer; 191 GLfloat tmpColor[4]; 192 GLubyte ubcolor[4]; 193 GLuint color; 194 unsigned int num_cliprects; 195 drm_clip_rect_t *cliprects; 196 int x_off, y_off; 197 GLsizei bitmap_width = width; 198 GLsizei bitmap_height = height; 199 200 /* Update draw buffer bounds */ 201 _mesa_update_state(ctx); 202 203 if (ctx->Depth.Test) { 204 /* The blit path produces incorrect results when depth testing is on. 205 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 206 * will likely be obscured by other, closer geometry. 207 */ 208 return GL_FALSE; 209 } 210 211 if (!dst) 212 return GL_FALSE; 213 214 if (_mesa_is_bufferobj(unpack->BufferObj)) { 215 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 216 if (bitmap == NULL) 217 return GL_TRUE; /* even though this is an error, we're done */ 218 } 219 220 COPY_4V(tmpColor, ctx->Current.RasterColor); 221 222 if (NEED_SECONDARY_COLOR(ctx)) { 223 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 224 } 225 226 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 227 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 228 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 229 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 230 231 if (dst->cpp == 2) 232 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 233 else 234 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 235 236 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 237 return GL_FALSE; 238 239 LOCK_HARDWARE(intel); 240 241 intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off); 242 if (num_cliprects != 0) { 243 GLuint i; 244 GLint orig_dstx = dstx; 245 GLint orig_dsty = dsty; 246 247 /* Clip to buffer bounds and scissor. */ 248 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 249 fb->_Xmax, fb->_Ymax, 250 &dstx, &dsty, &width, &height)) 251 goto out; 252 253 dstx = x_off + dstx; 254 dsty = y_off + y_flip(fb, dsty, height); 255 256 for (i = 0; i < num_cliprects; i++) { 257 int box_x, box_y, box_w, box_h; 258 GLint px, py; 259 GLuint stipple[32]; 260 261 box_x = dstx; 262 box_y = dsty; 263 box_w = width; 264 box_h = height; 265 266 /* Clip to drawable cliprect */ 267 if (!_mesa_clip_to_region(cliprects[i].x1, 268 cliprects[i].y1, 269 cliprects[i].x2, 270 cliprects[i].y2, 271 &box_x, &box_y, &box_w, &box_h)) 272 continue; 273 274#define DY 32 275#define DX 32 276 277 /* Then, finally, chop it all into chunks that can be 278 * digested by hardware: 279 */ 280 for (py = 0; py < box_h; py += DY) { 281 for (px = 0; px < box_w; px += DX) { 282 int h = MIN2(DY, box_h - py); 283 int w = MIN2(DX, box_w - px); 284 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 285 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 286 ctx->Color.LogicOp : GL_COPY; 287 288 assert(sz <= sizeof(stipple)); 289 memset(stipple, 0, sz); 290 291 /* May need to adjust this when padding has been introduced in 292 * sz above: 293 * 294 * Have to translate destination coordinates back into source 295 * coordinates. 296 */ 297 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 298 bitmap, 299 -orig_dstx + (box_x + px - x_off), 300 -orig_dsty + y_flip(fb, 301 box_y + py - y_off, h), 302 w, h, 303 (GLubyte *)stipple, 304 8, 305 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 306 continue; 307 308 if (!intelEmitImmediateColorExpandBlit(intel, 309 dst->cpp, 310 (GLubyte *)stipple, 311 sz, 312 color, 313 dst->pitch, 314 dst->buffer, 315 0, 316 dst->tiling, 317 box_x + px, 318 box_y + py, 319 w, h, 320 logic_op)) { 321 return GL_FALSE; 322 } 323 } 324 } 325 } 326 } 327out: 328 UNLOCK_HARDWARE(intel); 329 330 if (INTEL_DEBUG & DEBUG_SYNC) 331 intel_batchbuffer_flush(intel->batch); 332 333 if (_mesa_is_bufferobj(unpack->BufferObj)) { 334 /* done with PBO so unmap it now */ 335 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 336 unpack->BufferObj); 337 } 338 339 intel_check_front_buffer_rendering(intel); 340 341 return GL_TRUE; 342} 343 344static GLboolean 345intel_texture_bitmap(GLcontext * ctx, 346 GLint dst_x, GLint dst_y, 347 GLsizei width, GLsizei height, 348 const struct gl_pixelstore_attrib *unpack, 349 const GLubyte *bitmap) 350{ 351 struct intel_context *intel = intel_context(ctx); 352 static const char *fp = 353 "!!ARBfp1.0\n" 354 "TEMP val;\n" 355 "PARAM color=program.local[0];\n" 356 "TEX val, fragment.texcoord[0], texture[0], 2D;\n" 357 "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n" 358 "KIL val;\n" 359 "MOV result.color, color;\n" 360 "END\n"; 361 GLuint texname; 362 GLfloat vertices[4][4]; 363 GLint old_active_texture; 364 GLubyte *a8_bitmap; 365 GLfloat dst_z; 366 367 /* We need a fragment program for the KIL effect */ 368 if (!ctx->Extensions.ARB_fragment_program || 369 !ctx->Extensions.ARB_vertex_program) { 370 if (INTEL_DEBUG & DEBUG_FALLBACKS) 371 fprintf(stderr, 372 "glBitmap fallback: No fragment/vertex program support\n"); 373 return GL_FALSE; 374 } 375 376 /* We're going to mess with texturing with no regard to existing texture 377 * state, so if there is some set up we have to bail. 378 */ 379 if (ctx->Texture._EnabledUnits != 0) { 380 if (INTEL_DEBUG & DEBUG_FALLBACKS) 381 fprintf(stderr, "glBitmap fallback: texturing enabled\n"); 382 return GL_FALSE; 383 } 384 385 /* Can't do textured DrawPixels with a fragment program, unless we were 386 * to generate a new program that sampled our texture and put the results 387 * in the fragment color before the user's program started. 388 */ 389 if (ctx->FragmentProgram.Enabled) { 390 if (INTEL_DEBUG & DEBUG_FALLBACKS) 391 fprintf(stderr, "glBitmap fallback: fragment program enabled\n"); 392 return GL_FALSE; 393 } 394 395 if (ctx->VertexProgram.Enabled) { 396 if (INTEL_DEBUG & DEBUG_FALLBACKS) 397 fprintf(stderr, "glBitmap fallback: vertex program enabled\n"); 398 return GL_FALSE; 399 } 400 401 if (!ctx->Extensions.ARB_texture_non_power_of_two && 402 (!is_power_of_two(width) || !is_power_of_two(height))) { 403 if (INTEL_DEBUG & DEBUG_FALLBACKS) 404 fprintf(stderr, 405 "glBitmap() fallback: NPOT texture\n"); 406 return GL_FALSE; 407 } 408 409 if (ctx->Fog.Enabled) { 410 if (INTEL_DEBUG & DEBUG_FALLBACKS) 411 fprintf(stderr, "glBitmap() fallback: fog\n"); 412 return GL_FALSE; 413 } 414 415 /* Check that we can load in a texture this big. */ 416 if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) || 417 height > (1 << (ctx->Const.MaxTextureLevels - 1))) { 418 if (INTEL_DEBUG & DEBUG_FALLBACKS) 419 fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n", 420 width, height); 421 return GL_FALSE; 422 } 423 424 if (_mesa_is_bufferobj(unpack->BufferObj)) { 425 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 426 if (bitmap == NULL) 427 return GL_TRUE; /* even though this is an error, we're done */ 428 } 429 430 /* Convert the A1 bitmap to an A8 format suitable for glTexImage */ 431 a8_bitmap = _mesa_calloc(width * height); 432 _mesa_expand_bitmap(width, height, unpack, bitmap, a8_bitmap, width, 0xff); 433 434 if (_mesa_is_bufferobj(unpack->BufferObj)) { 435 /* done with PBO so unmap it now */ 436 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 437 unpack->BufferObj); 438 } 439 440 /* Save GL state before we start setting up our drawing */ 441 _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_POLYGON_BIT | 442 GL_TEXTURE_BIT | GL_VIEWPORT_BIT); 443 _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT | 444 GL_CLIENT_PIXEL_STORE_BIT); 445 old_active_texture = ctx->Texture.CurrentUnit; 446 447 _mesa_Disable(GL_POLYGON_STIPPLE); 448 _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL); 449 450 /* Upload our bitmap data to an alpha texture */ 451 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB); 452 _mesa_Enable(GL_TEXTURE_2D); 453 _mesa_GenTextures(1, &texname); 454 _mesa_BindTexture(GL_TEXTURE_2D, texname); 455 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 456 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 457 458 _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); 459 _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); 460 _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0); 461 _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0); 462 _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0); 463 _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1); 464 _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, 465 GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap); 466 _mesa_free(a8_bitmap); 467 468 meta_set_fragment_program(&intel->meta, &intel->meta.bitmap_fp, fp); 469 _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0, 470 ctx->Current.RasterColor); 471 meta_set_passthrough_vertex_program(&intel->meta); 472 meta_set_passthrough_transform(&intel->meta); 473 474 /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */ 475 dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2]; 476 477 /* RasterPos[2] already takes into account the DepthRange mapping. */ 478 _mesa_DepthRange(0.0, 1.0); 479 480 vertices[0][0] = dst_x; 481 vertices[0][1] = dst_y; 482 vertices[0][2] = dst_z; 483 vertices[0][3] = 1.0; 484 vertices[1][0] = dst_x + width; 485 vertices[1][1] = dst_y; 486 vertices[1][2] = dst_z; 487 vertices[1][3] = 1.0; 488 vertices[2][0] = dst_x + width; 489 vertices[2][1] = dst_y + height; 490 vertices[2][2] = dst_z; 491 vertices[2][3] = 1.0; 492 vertices[3][0] = dst_x; 493 vertices[3][1] = dst_y + height; 494 vertices[3][2] = dst_z; 495 vertices[3][3] = 1.0; 496 497 _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices); 498 _mesa_Enable(GL_VERTEX_ARRAY); 499 meta_set_default_texrect(&intel->meta); 500 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); 501 502 meta_restore_texcoords(&intel->meta); 503 meta_restore_transform(&intel->meta); 504 meta_restore_fragment_program(&intel->meta); 505 meta_restore_vertex_program(&intel->meta); 506 507 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture); 508 _mesa_PopClientAttrib(); 509 _mesa_PopAttrib(); 510 511 _mesa_DeleteTextures(1, &texname); 512 513 return GL_TRUE; 514} 515 516/* There are a large number of possible ways to implement bitmap on 517 * this hardware, most of them have some sort of drawback. Here are a 518 * few that spring to mind: 519 * 520 * Blit: 521 * - XY_MONO_SRC_BLT_CMD 522 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 523 * - XY_TEXT_BLT 524 * - XY_TEXT_IMMEDIATE_BLT 525 * - blit per cliprect, subject to maximum immediate data size. 526 * - XY_COLOR_BLT 527 * - per pixel or run of pixels 528 * - XY_PIXEL_BLT 529 * - good for sparse bitmaps 530 * 531 * 3D engine: 532 * - Point per pixel 533 * - Translate bitmap to an alpha texture and render as a quad 534 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 535 */ 536void 537intelBitmap(GLcontext * ctx, 538 GLint x, GLint y, 539 GLsizei width, GLsizei height, 540 const struct gl_pixelstore_attrib *unpack, 541 const GLubyte * pixels) 542{ 543 if (do_blit_bitmap(ctx, x, y, width, height, 544 unpack, pixels)) 545 return; 546 547 if (intel_texture_bitmap(ctx, x, y, width, height, 548 unpack, pixels)) 549 return; 550 551 if (INTEL_DEBUG & DEBUG_PIXEL) 552 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 553 554 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 555} 556