intel_pixel_bitmap.c revision 8f81a6468fdbc7320800ea497791e3e1b8f782ca
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/pixelstore.h" 36#include "main/state.h" 37#include "main/teximage.h" 38#include "main/texenv.h" 39#include "main/texobj.h" 40#include "main/texstate.h" 41#include "main/texparam.h" 42#include "main/varray.h" 43#include "main/attrib.h" 44#include "main/enable.h" 45#include "shader/arbprogram.h" 46#include "glapi/dispatch.h" 47#include "swrast/swrast.h" 48 49#include "intel_screen.h" 50#include "intel_context.h" 51#include "intel_batchbuffer.h" 52#include "intel_blit.h" 53#include "intel_regions.h" 54#include "intel_buffer_objects.h" 55#include "intel_buffers.h" 56#include "intel_pixel.h" 57#include "intel_reg.h" 58 59 60#define FILE_DEBUG_FLAG DEBUG_PIXEL 61 62 63/* Unlike the other intel_pixel_* functions, the expectation here is 64 * that the incoming data is not in a PBO. With the XY_TEXT blit 65 * method, there's no benefit haveing it in a PBO, but we could 66 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 67 * PBO bitmaps. I think they are probably pretty rare though - I 68 * wonder if Xgl uses them? 69 */ 70static const GLubyte *map_pbo( GLcontext *ctx, 71 GLsizei width, GLsizei height, 72 const struct gl_pixelstore_attrib *unpack, 73 const GLubyte *bitmap ) 74{ 75 GLubyte *buf; 76 77 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 78 GL_COLOR_INDEX, GL_BITMAP, 79 (GLvoid *) bitmap)) { 80 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 81 return NULL; 82 } 83 84 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 85 GL_READ_ONLY_ARB, 86 unpack->BufferObj); 87 if (!buf) { 88 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 89 return NULL; 90 } 91 92 return ADD_POINTERS(buf, bitmap); 93} 94 95static GLboolean test_bit( const GLubyte *src, 96 GLuint bit ) 97{ 98 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 99} 100 101static GLboolean test_msb_bit(const GLubyte *src, GLuint bit) 102{ 103 return (src[bit/8] & (1<<(7 - (bit % 8)))) ? 1 : 0; 104} 105 106static void set_bit( GLubyte *dest, 107 GLuint bit ) 108{ 109 dest[bit/8] |= 1 << (bit % 8); 110} 111 112/* Extract a rectangle's worth of data from the bitmap. Called 113 * per-cliprect. 114 */ 115static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 116 const struct gl_pixelstore_attrib *unpack, 117 const GLubyte *bitmap, 118 GLuint x, GLuint y, 119 GLuint w, GLuint h, 120 GLubyte *dest, 121 GLuint row_align, 122 GLboolean invert) 123{ 124 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 125 GLuint mask = unpack->LsbFirst ? 0 : 7; 126 GLuint bit = 0; 127 GLint row, col; 128 GLint first, last; 129 GLint incr; 130 GLuint count = 0; 131 132 if (INTEL_DEBUG & DEBUG_PIXEL) 133 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 134 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 135 136 if (invert) { 137 first = h-1; 138 last = 0; 139 incr = -1; 140 } 141 else { 142 first = 0; 143 last = h-1; 144 incr = 1; 145 } 146 147 /* Require that dest be pre-zero'd. 148 */ 149 for (row = first; row != (last+incr); row += incr) { 150 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 151 width, height, 152 GL_COLOR_INDEX, GL_BITMAP, 153 y + row, x); 154 155 for (col = 0; col < w; col++, bit++) { 156 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 157 set_bit(dest, bit ^ 7); 158 count++; 159 } 160 } 161 162 if (row_align) 163 bit = ALIGN(bit, row_align); 164 } 165 166 return count; 167} 168 169/** 170 * Returns the low Y value of the vertical range given, flipped according to 171 * whether the framebuffer is or not. 172 */ 173static inline int 174y_flip(struct gl_framebuffer *fb, int y, int height) 175{ 176 if (fb->Name != 0) 177 return y; 178 else 179 return fb->Height - y - height; 180} 181 182/* 183 * Render a bitmap. 184 */ 185static GLboolean 186do_blit_bitmap( GLcontext *ctx, 187 GLint dstx, GLint dsty, 188 GLsizei width, GLsizei height, 189 const struct gl_pixelstore_attrib *unpack, 190 const GLubyte *bitmap ) 191{ 192 struct intel_context *intel = intel_context(ctx); 193 struct intel_region *dst = intel_drawbuf_region(intel); 194 struct gl_framebuffer *fb = ctx->DrawBuffer; 195 GLfloat tmpColor[4]; 196 GLubyte ubcolor[4]; 197 GLuint color; 198 unsigned int num_cliprects; 199 drm_clip_rect_t *cliprects; 200 int x_off, y_off; 201 GLsizei bitmap_width = width; 202 GLsizei bitmap_height = height; 203 204 /* Update draw buffer bounds */ 205 _mesa_update_state(ctx); 206 207 if (ctx->Depth.Test) { 208 /* The blit path produces incorrect results when depth testing is on. 209 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 210 * will likely be obscured by other, closer geometry. 211 */ 212 return GL_FALSE; 213 } 214 215 if (!dst) 216 return GL_FALSE; 217 218 if (unpack->BufferObj->Name) { 219 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 220 if (bitmap == NULL) 221 return GL_TRUE; /* even though this is an error, we're done */ 222 } 223 224 COPY_4V(tmpColor, ctx->Current.RasterColor); 225 226 if (NEED_SECONDARY_COLOR(ctx)) { 227 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 228 } 229 230 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 231 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 232 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 233 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 234 235 if (dst->cpp == 2) 236 color = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]); 237 else 238 color = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], 239 ubcolor[2], ubcolor[3]); 240 241 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 242 return GL_FALSE; 243 244 LOCK_HARDWARE(intel); 245 246 intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off); 247 if (num_cliprects != 0) { 248 GLuint i; 249 GLint orig_dstx = dstx; 250 GLint orig_dsty = dsty; 251 252 /* Clip to buffer bounds and scissor. */ 253 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 254 fb->_Xmax, fb->_Ymax, 255 &dstx, &dsty, &width, &height)) 256 goto out; 257 258 dstx = x_off + dstx; 259 dsty = y_off + y_flip(fb, dsty, height); 260 261 for (i = 0; i < num_cliprects; i++) { 262 int box_x, box_y, box_w, box_h; 263 GLint px, py; 264 GLuint stipple[32]; 265 266 box_x = dstx; 267 box_y = dsty; 268 box_w = width; 269 box_h = height; 270 271 /* Clip to drawable cliprect */ 272 if (!_mesa_clip_to_region(cliprects[i].x1, 273 cliprects[i].y1, 274 cliprects[i].x2, 275 cliprects[i].y2, 276 &box_x, &box_y, &box_w, &box_h)) 277 continue; 278 279#define DY 32 280#define DX 32 281 282 /* Then, finally, chop it all into chunks that can be 283 * digested by hardware: 284 */ 285 for (py = 0; py < box_h; py += DY) { 286 for (px = 0; px < box_w; px += DX) { 287 int h = MIN2(DY, box_h - py); 288 int w = MIN2(DX, box_w - px); 289 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 290 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 291 ctx->Color.LogicOp : GL_COPY; 292 293 assert(sz <= sizeof(stipple)); 294 memset(stipple, 0, sz); 295 296 /* May need to adjust this when padding has been introduced in 297 * sz above: 298 * 299 * Have to translate destination coordinates back into source 300 * coordinates. 301 */ 302 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 303 bitmap, 304 -orig_dstx + (box_x + px - x_off), 305 -orig_dsty + y_flip(fb, 306 box_y + py - y_off, h), 307 w, h, 308 (GLubyte *)stipple, 309 8, 310 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 311 continue; 312 313 if (!intelEmitImmediateColorExpandBlit(intel, 314 dst->cpp, 315 (GLubyte *)stipple, 316 sz, 317 color, 318 dst->pitch, 319 dst->buffer, 320 0, 321 dst->tiling, 322 box_x + px, 323 box_y + py, 324 w, h, 325 logic_op)) { 326 return GL_FALSE; 327 } 328 } 329 } 330 } 331 } 332out: 333 UNLOCK_HARDWARE(intel); 334 335 if (INTEL_DEBUG & DEBUG_SYNC) 336 intel_batchbuffer_flush(intel->batch); 337 338 if (unpack->BufferObj->Name) { 339 /* done with PBO so unmap it now */ 340 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 341 unpack->BufferObj); 342 } 343 344 return GL_TRUE; 345} 346 347static GLboolean 348intel_texture_bitmap(GLcontext * ctx, 349 GLint dst_x, GLint dst_y, 350 GLsizei width, GLsizei height, 351 const struct gl_pixelstore_attrib *unpack, 352 const GLubyte *bitmap) 353{ 354 struct intel_context *intel = intel_context(ctx); 355 static const char *fp = 356 "!!ARBfp1.0\n" 357 "TEMP val;\n" 358 "PARAM color=program.local[0];\n" 359 "TEX val, fragment.texcoord[0], texture[0], 2D;\n" 360 "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n" 361 "KIL val;\n" 362 "MOV result.color, color;\n" 363 "END\n"; 364 GLuint texname; 365 GLfloat vertices[4][4]; 366 GLint old_active_texture; 367 GLubyte *unpacked_bitmap; 368 GLubyte *a8_bitmap; 369 int x, y; 370 GLfloat dst_z; 371 372 /* We need a fragment program for the KIL effect */ 373 if (!ctx->Extensions.ARB_fragment_program || 374 !ctx->Extensions.ARB_vertex_program) { 375 if (INTEL_DEBUG & DEBUG_FALLBACKS) 376 fprintf(stderr, 377 "glBitmap fallback: No fragment/vertex program support\n"); 378 return GL_FALSE; 379 } 380 381 /* We're going to mess with texturing with no regard to existing texture 382 * state, so if there is some set up we have to bail. 383 */ 384 if (ctx->Texture._EnabledUnits != 0) { 385 if (INTEL_DEBUG & DEBUG_FALLBACKS) 386 fprintf(stderr, "glBitmap fallback: texturing enabled\n"); 387 return GL_FALSE; 388 } 389 390 /* Can't do textured DrawPixels with a fragment program, unless we were 391 * to generate a new program that sampled our texture and put the results 392 * in the fragment color before the user's program started. 393 */ 394 if (ctx->FragmentProgram.Enabled) { 395 if (INTEL_DEBUG & DEBUG_FALLBACKS) 396 fprintf(stderr, "glBitmap fallback: fragment program enabled\n"); 397 return GL_FALSE; 398 } 399 400 if (ctx->VertexProgram.Enabled) { 401 if (INTEL_DEBUG & DEBUG_FALLBACKS) 402 fprintf(stderr, "glBitmap fallback: vertex program enabled\n"); 403 return GL_FALSE; 404 } 405 406 if (!ctx->Extensions.ARB_texture_non_power_of_two && 407 (!is_power_of_two(width) || !is_power_of_two(height))) { 408 if (INTEL_DEBUG & DEBUG_FALLBACKS) 409 fprintf(stderr, 410 "glBitmap() fallback: NPOT texture\n"); 411 return GL_FALSE; 412 } 413 414 /* Check that we can load in a texture this big. */ 415 if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) || 416 height > (1 << (ctx->Const.MaxTextureLevels - 1))) { 417 if (INTEL_DEBUG & DEBUG_FALLBACKS) 418 fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n", 419 width, height); 420 return GL_FALSE; 421 } 422 423 /* Convert the A1 bitmap to an A8 format suitable for glTexImage */ 424 if (unpack->BufferObj->Name) { 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 unpacked_bitmap = _mesa_unpack_bitmap(width, height, bitmap, 430 unpack); 431 a8_bitmap = _mesa_calloc(width * height); 432 for (y = 0; y < height; y++) { 433 for (x = 0; x < width; x++) { 434 if (test_msb_bit(unpacked_bitmap, ALIGN(width, 8) * y + x)) 435 a8_bitmap[y * width + x] = 0xff; 436 } 437 } 438 _mesa_free(unpacked_bitmap); 439 if (unpack->BufferObj->Name) { 440 /* done with PBO so unmap it now */ 441 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 442 unpack->BufferObj); 443 } 444 445 /* Save GL state before we start setting up our drawing */ 446 _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | 447 GL_VIEWPORT_BIT); 448 _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT | 449 GL_CLIENT_PIXEL_STORE_BIT); 450 old_active_texture = ctx->Texture.CurrentUnit; 451 452 _mesa_Disable(GL_POLYGON_STIPPLE); 453 454 /* Upload our bitmap data to an alpha texture */ 455 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB); 456 _mesa_Enable(GL_TEXTURE_2D); 457 _mesa_GenTextures(1, &texname); 458 _mesa_BindTexture(GL_TEXTURE_2D, texname); 459 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 460 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 461 462 _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); 463 _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); 464 _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0); 465 _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0); 466 _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0); 467 _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1); 468 _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, 469 GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap); 470 _mesa_free(a8_bitmap); 471 472 intel_meta_set_fragment_program(intel, &intel->meta.bitmap_fp, fp); 473 _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0, 474 ctx->Current.RasterColor); 475 intel_meta_set_passthrough_vertex_program(intel); 476 intel_meta_set_passthrough_transform(intel); 477 478 /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */ 479 dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2]; 480 481 vertices[0][0] = dst_x; 482 vertices[0][1] = dst_y; 483 vertices[0][2] = dst_z; 484 vertices[0][3] = 1.0; 485 vertices[1][0] = dst_x + width; 486 vertices[1][1] = dst_y; 487 vertices[1][2] = dst_z; 488 vertices[1][3] = 1.0; 489 vertices[2][0] = dst_x + width; 490 vertices[2][1] = dst_y + height; 491 vertices[2][2] = dst_z; 492 vertices[2][3] = 1.0; 493 vertices[3][0] = dst_x; 494 vertices[3][1] = dst_y + height; 495 vertices[3][2] = dst_z; 496 vertices[3][3] = 1.0; 497 498 _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices); 499 _mesa_Enable(GL_VERTEX_ARRAY); 500 intel_meta_set_default_texrect(intel); 501 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); 502 503 intel_meta_restore_texcoords(intel); 504 intel_meta_restore_transform(intel); 505 intel_meta_restore_fragment_program(intel); 506 intel_meta_restore_vertex_program(intel); 507 508 _mesa_PopClientAttrib(); 509 _mesa_Disable(GL_TEXTURE_2D); /* asserted that it was disabled at entry */ 510 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture); 511 _mesa_PopAttrib(); 512 513 _mesa_DeleteTextures(1, &texname); 514 515 return GL_TRUE; 516} 517 518/* There are a large number of possible ways to implement bitmap on 519 * this hardware, most of them have some sort of drawback. Here are a 520 * few that spring to mind: 521 * 522 * Blit: 523 * - XY_MONO_SRC_BLT_CMD 524 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 525 * - XY_TEXT_BLT 526 * - XY_TEXT_IMMEDIATE_BLT 527 * - blit per cliprect, subject to maximum immediate data size. 528 * - XY_COLOR_BLT 529 * - per pixel or run of pixels 530 * - XY_PIXEL_BLT 531 * - good for sparse bitmaps 532 * 533 * 3D engine: 534 * - Point per pixel 535 * - Translate bitmap to an alpha texture and render as a quad 536 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 537 */ 538void 539intelBitmap(GLcontext * ctx, 540 GLint x, GLint y, 541 GLsizei width, GLsizei height, 542 const struct gl_pixelstore_attrib *unpack, 543 const GLubyte * pixels) 544{ 545 if (do_blit_bitmap(ctx, x, y, width, height, 546 unpack, pixels)) 547 return; 548 549 if (intel_texture_bitmap(ctx, x, y, width, height, 550 unpack, pixels)) 551 return; 552 553 if (INTEL_DEBUG & DEBUG_PIXEL) 554 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 555 556 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 557} 558