intel_pixel_bitmap.c revision bfebeffc0045266d354a36968336337e099a9f27
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 color8888, color565; 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 (!dst) 208 return GL_FALSE; 209 210 if (unpack->BufferObj->Name) { 211 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 212 if (bitmap == NULL) 213 return GL_TRUE; /* even though this is an error, we're done */ 214 } 215 216 COPY_4V(tmpColor, ctx->Current.RasterColor); 217 218 if (NEED_SECONDARY_COLOR(ctx)) { 219 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 220 } 221 222 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 223 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 224 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 225 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 226 227 color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]); 228 color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]); 229 230 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 231 return GL_FALSE; 232 233 LOCK_HARDWARE(intel); 234 235 intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off); 236 if (num_cliprects != 0) { 237 GLuint i; 238 GLint orig_dstx = dstx; 239 GLint orig_dsty = dsty; 240 241 /* Clip to buffer bounds and scissor. */ 242 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 243 fb->_Xmax, fb->_Ymax, 244 &dstx, &dsty, &width, &height)) 245 goto out; 246 247 dstx = x_off + dstx; 248 dsty = y_off + y_flip(fb, dsty, height); 249 250 for (i = 0; i < num_cliprects; i++) { 251 int box_x, box_y, box_w, box_h; 252 GLint px, py; 253 GLuint stipple[32]; 254 255 box_x = dstx; 256 box_y = dsty; 257 box_w = width; 258 box_h = height; 259 260 /* Clip to drawable cliprect */ 261 if (!_mesa_clip_to_region(cliprects[i].x1, 262 cliprects[i].y1, 263 cliprects[i].x2, 264 cliprects[i].y2, 265 &box_x, &box_y, &box_w, &box_h)) 266 continue; 267 268#define DY 32 269#define DX 32 270 271 /* Then, finally, chop it all into chunks that can be 272 * digested by hardware: 273 */ 274 for (py = 0; py < box_h; py += DY) { 275 for (px = 0; px < box_w; px += DX) { 276 int h = MIN2(DY, box_h - py); 277 int w = MIN2(DX, box_w - px); 278 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 279 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 280 ctx->Color.LogicOp : GL_COPY; 281 282 assert(sz <= sizeof(stipple)); 283 memset(stipple, 0, sz); 284 285 /* May need to adjust this when padding has been introduced in 286 * sz above: 287 * 288 * Have to translate destination coordinates back into source 289 * coordinates. 290 */ 291 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 292 bitmap, 293 -orig_dstx + (box_x + px - x_off), 294 -orig_dsty + y_flip(fb, 295 box_y + py - y_off, h), 296 w, h, 297 (GLubyte *)stipple, 298 8, 299 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 300 continue; 301 302 /* 303 */ 304 intelEmitImmediateColorExpandBlit( intel, 305 dst->cpp, 306 (GLubyte *)stipple, 307 sz, 308 (dst->cpp == 2) ? color565 : color8888, 309 dst->pitch, 310 dst->buffer, 311 0, 312 dst->tiling, 313 box_x + px, 314 box_y + py, 315 w, h, 316 logic_op); 317 } 318 } 319 } 320 } 321out: 322 UNLOCK_HARDWARE(intel); 323 324 if (INTEL_DEBUG & DEBUG_SYNC) 325 intel_batchbuffer_flush(intel->batch); 326 327 if (unpack->BufferObj->Name) { 328 /* done with PBO so unmap it now */ 329 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 330 unpack->BufferObj); 331 } 332 333 return GL_TRUE; 334} 335 336static GLboolean 337intel_texture_bitmap(GLcontext * ctx, 338 GLint dst_x, GLint dst_y, 339 GLsizei width, GLsizei height, 340 const struct gl_pixelstore_attrib *unpack, 341 const GLubyte *bitmap) 342{ 343 struct intel_context *intel = intel_context(ctx); 344 static const char *fp = 345 "!!ARBfp1.0\n" 346 "TEMP val;\n" 347 "PARAM color=program.local[0];\n" 348 "TEX val, fragment.texcoord[0], texture[0], 2D;\n" 349 "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n" 350 "KIL val;\n" 351 "MOV result.color, color;\n" 352 "END\n"; 353 GLuint texname; 354 GLfloat vertices[4][4]; 355 GLfloat texcoords[4][2]; 356 GLint old_active_texture; 357 GLubyte *unpacked_bitmap; 358 GLubyte *a8_bitmap; 359 int x, y; 360 361 /* We need a fragment program for the KIL effect */ 362 if (!ctx->Extensions.ARB_fragment_program || 363 !ctx->Extensions.ARB_vertex_program) { 364 if (INTEL_DEBUG & DEBUG_FALLBACKS) 365 fprintf(stderr, 366 "glBitmap fallback: No fragment/vertex program support\n"); 367 return GL_FALSE; 368 } 369 370 /* We're going to mess with texturing with no regard to existing texture 371 * state, so if there is some set up we have to bail. 372 */ 373 if (ctx->Texture._EnabledUnits != 0) { 374 if (INTEL_DEBUG & DEBUG_FALLBACKS) 375 fprintf(stderr, "glBitmap fallback: texturing enabled\n"); 376 return GL_FALSE; 377 } 378 379 /* Can't do textured DrawPixels with a fragment program, unless we were 380 * to generate a new program that sampled our texture and put the results 381 * in the fragment color before the user's program started. 382 */ 383 if (ctx->FragmentProgram.Enabled) { 384 if (INTEL_DEBUG & DEBUG_FALLBACKS) 385 fprintf(stderr, "glBitmap fallback: fragment program enabled\n"); 386 return GL_FALSE; 387 } 388 389 if (ctx->VertexProgram.Enabled) { 390 if (INTEL_DEBUG & DEBUG_FALLBACKS) 391 fprintf(stderr, "glBitmap fallback: vertex program enabled\n"); 392 return GL_FALSE; 393 } 394 395 /* Check that we can load in a texture this big. */ 396 if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) || 397 height > (1 << (ctx->Const.MaxTextureLevels - 1))) { 398 if (INTEL_DEBUG & DEBUG_FALLBACKS) 399 fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n", 400 width, height); 401 return GL_FALSE; 402 } 403 404 /* Convert the A1 bitmap to an A8 format suitable for glTexImage */ 405 if (unpack->BufferObj->Name) { 406 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 407 if (bitmap == NULL) 408 return GL_TRUE; /* even though this is an error, we're done */ 409 } 410 unpacked_bitmap = _mesa_unpack_bitmap(width, height, bitmap, 411 unpack); 412 a8_bitmap = _mesa_calloc(width * height); 413 for (y = 0; y < height; y++) { 414 for (x = 0; x < width; x++) { 415 if (test_msb_bit(unpacked_bitmap, ALIGN(width, 8) * y + x)) 416 a8_bitmap[y * width + x] = 0xff; 417 } 418 } 419 _mesa_free(unpacked_bitmap); 420 if (unpack->BufferObj->Name) { 421 /* done with PBO so unmap it now */ 422 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 423 unpack->BufferObj); 424 } 425 426 /* Save GL state before we start setting up our drawing */ 427 _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | 428 GL_VIEWPORT_BIT); 429 _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT | 430 GL_CLIENT_PIXEL_STORE_BIT); 431 old_active_texture = ctx->Texture.CurrentUnit; 432 433 _mesa_Disable(GL_POLYGON_STIPPLE); 434 435 /* Upload our bitmap data to an alpha texture */ 436 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB); 437 _mesa_Enable(GL_TEXTURE_2D); 438 _mesa_GenTextures(1, &texname); 439 _mesa_BindTexture(GL_TEXTURE_2D, texname); 440 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 441 _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 442 443 _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); 444 _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); 445 _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0); 446 _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0); 447 _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0); 448 _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1); 449 _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, 450 GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap); 451 _mesa_free(a8_bitmap); 452 453 intel_meta_set_fragment_program(intel, &intel->meta.bitmap_fp, fp); 454 _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0, 455 ctx->Current.RasterColor); 456 intel_meta_set_passthrough_vertex_program(intel); 457 intel_meta_set_passthrough_transform(intel); 458 459 vertices[0][0] = dst_x; 460 vertices[0][1] = dst_y; 461 vertices[0][2] = ctx->Current.RasterPos[2]; 462 vertices[0][3] = 1.0; 463 vertices[1][0] = dst_x + width; 464 vertices[1][1] = dst_y; 465 vertices[1][2] = ctx->Current.RasterPos[2]; 466 vertices[1][3] = 1.0; 467 vertices[2][0] = dst_x + width; 468 vertices[2][1] = dst_y + height; 469 vertices[2][2] = ctx->Current.RasterPos[2]; 470 vertices[2][3] = 1.0; 471 vertices[3][0] = dst_x; 472 vertices[3][1] = dst_y + height; 473 vertices[3][2] = ctx->Current.RasterPos[2]; 474 vertices[3][3] = 1.0; 475 476 texcoords[0][0] = 0.0; 477 texcoords[0][1] = 0.0; 478 texcoords[1][0] = 1.0; 479 texcoords[1][1] = 0.0; 480 texcoords[2][0] = 1.0; 481 texcoords[2][1] = 1.0; 482 texcoords[3][0] = 0.0; 483 texcoords[3][1] = 1.0; 484 485 _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices); 486 _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords); 487 _mesa_Enable(GL_VERTEX_ARRAY); 488 _mesa_Enable(GL_TEXTURE_COORD_ARRAY); 489 CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4)); 490 491 intel_meta_restore_transform(intel); 492 intel_meta_restore_fragment_program(intel); 493 intel_meta_restore_vertex_program(intel); 494 495 _mesa_PopClientAttrib(); 496 _mesa_Disable(GL_TEXTURE_2D); /* asserted that it was disabled at entry */ 497 _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture); 498 _mesa_PopAttrib(); 499 500 _mesa_DeleteTextures(1, &texname); 501 502 return GL_TRUE; 503} 504 505/* There are a large number of possible ways to implement bitmap on 506 * this hardware, most of them have some sort of drawback. Here are a 507 * few that spring to mind: 508 * 509 * Blit: 510 * - XY_MONO_SRC_BLT_CMD 511 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 512 * - XY_TEXT_BLT 513 * - XY_TEXT_IMMEDIATE_BLT 514 * - blit per cliprect, subject to maximum immediate data size. 515 * - XY_COLOR_BLT 516 * - per pixel or run of pixels 517 * - XY_PIXEL_BLT 518 * - good for sparse bitmaps 519 * 520 * 3D engine: 521 * - Point per pixel 522 * - Translate bitmap to an alpha texture and render as a quad 523 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 524 */ 525void 526intelBitmap(GLcontext * ctx, 527 GLint x, GLint y, 528 GLsizei width, GLsizei height, 529 const struct gl_pixelstore_attrib *unpack, 530 const GLubyte * pixels) 531{ 532 if (do_blit_bitmap(ctx, x, y, width, height, 533 unpack, pixels)) 534 return; 535 536 if (intel_texture_bitmap(ctx, x, y, width, height, 537 unpack, pixels)) 538 return; 539 540 if (INTEL_DEBUG & DEBUG_PIXEL) 541 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 542 543 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 544} 545