intel_pixel_bitmap.c revision 35fd72756a05463568d94862f4fcd234903e1204
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 "glheader.h" 29#include "enums.h" 30#include "image.h" 31#include "colormac.h" 32#include "mtypes.h" 33#include "macros.h" 34#include "bufferobj.h" 35#include "swrast/swrast.h" 36 37#include "intel_screen.h" 38#include "intel_context.h" 39#include "intel_batchbuffer.h" 40#include "intel_blit.h" 41#include "intel_regions.h" 42#include "intel_buffer_objects.h" 43#include "intel_buffers.h" 44#include "intel_pixel.h" 45#include "intel_reg.h" 46 47 48#define FILE_DEBUG_FLAG DEBUG_PIXEL 49 50 51/* Unlike the other intel_pixel_* functions, the expectation here is 52 * that the incoming data is not in a PBO. With the XY_TEXT blit 53 * method, there's no benefit haveing it in a PBO, but we could 54 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 55 * PBO bitmaps. I think they are probably pretty rare though - I 56 * wonder if Xgl uses them? 57 */ 58static const GLubyte *map_pbo( GLcontext *ctx, 59 GLsizei width, GLsizei height, 60 const struct gl_pixelstore_attrib *unpack, 61 const GLubyte *bitmap ) 62{ 63 GLubyte *buf; 64 65 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 66 GL_COLOR_INDEX, GL_BITMAP, 67 (GLvoid *) bitmap)) { 68 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 69 return NULL; 70 } 71 72 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 73 GL_READ_ONLY_ARB, 74 unpack->BufferObj); 75 if (!buf) { 76 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 77 return NULL; 78 } 79 80 return ADD_POINTERS(buf, bitmap); 81} 82 83static GLboolean test_bit( const GLubyte *src, 84 GLuint bit ) 85{ 86 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 87} 88 89static void set_bit( GLubyte *dest, 90 GLuint bit ) 91{ 92 dest[bit/8] |= 1 << (bit % 8); 93} 94 95/* Extract a rectangle's worth of data from the bitmap. Called 96 * per-cliprect. 97 */ 98static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 99 const struct gl_pixelstore_attrib *unpack, 100 const GLubyte *bitmap, 101 GLuint x, GLuint y, 102 GLuint w, GLuint h, 103 GLubyte *dest, 104 GLuint row_align, 105 GLboolean invert) 106{ 107 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 108 GLuint mask = unpack->LsbFirst ? 0 : 7; 109 GLuint bit = 0; 110 GLint row, col; 111 GLint first, last; 112 GLint incr; 113 GLuint count = 0; 114 115 if (INTEL_DEBUG & DEBUG_PIXEL) 116 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 117 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 118 119 if (invert) { 120 first = h-1; 121 last = 0; 122 incr = -1; 123 } 124 else { 125 first = 0; 126 last = h-1; 127 incr = 1; 128 } 129 130 /* Require that dest be pre-zero'd. 131 */ 132 for (row = first; row != (last+incr); row += incr) { 133 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 134 width, height, 135 GL_COLOR_INDEX, GL_BITMAP, 136 y + row, x); 137 138 for (col = 0; col < w; col++, bit++) { 139 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 140 set_bit(dest, bit ^ 7); 141 count++; 142 } 143 } 144 145 if (row_align) 146 bit = ALIGN(bit, row_align); 147 } 148 149 return count; 150} 151 152 153 154 155/* 156 * Render a bitmap. 157 */ 158static GLboolean 159do_blit_bitmap( GLcontext *ctx, 160 GLint dstx, GLint dsty, 161 GLsizei width, GLsizei height, 162 const struct gl_pixelstore_attrib *unpack, 163 const GLubyte *bitmap ) 164{ 165 struct intel_context *intel = intel_context(ctx); 166 struct intel_region *dst = intel_drawbuf_region(intel); 167 GLfloat tmpColor[4]; 168 GLubyte ubcolor[4]; 169 GLuint color8888, color565; 170 171 if (!dst) 172 return GL_FALSE; 173 174 if (unpack->BufferObj->Name) { 175 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 176 if (bitmap == NULL) 177 return GL_TRUE; /* even though this is an error, we're done */ 178 } 179 180 COPY_4V(tmpColor, ctx->Current.RasterColor); 181 182 if (NEED_SECONDARY_COLOR(ctx)) { 183 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 184 } 185 186 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 187 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 188 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 189 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 190 191 color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]); 192 color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]); 193 194 /* Does zoom apply to bitmaps? 195 */ 196 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F) || 197 ctx->Pixel.ZoomX != 1.0F || 198 ctx->Pixel.ZoomY != 1.0F) 199 return GL_FALSE; 200 201 LOCK_HARDWARE(intel); 202 203 if (intel->driDrawable->numClipRects) { 204 __DRIdrawablePrivate *dPriv = intel->driDrawable; 205 drm_clip_rect_t *box = dPriv->pClipRects; 206 drm_clip_rect_t dest_rect; 207 GLint nbox = dPriv->numClipRects; 208 GLint srcx = 0, srcy = 0; 209 GLint orig_screen_x1, orig_screen_y2; 210 GLuint i; 211 212 213 orig_screen_x1 = dPriv->x + dstx; 214 orig_screen_y2 = dPriv->y + (dPriv->h - dsty); 215 216 /* Do scissoring in GL coordinates: 217 */ 218 if (ctx->Scissor.Enabled) 219 { 220 GLint x = ctx->Scissor.X; 221 GLint y = ctx->Scissor.Y; 222 GLuint w = ctx->Scissor.Width; 223 GLuint h = ctx->Scissor.Height; 224 225 if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height)) 226 goto out; 227 } 228 229 /* Convert from GL to hardware coordinates: 230 */ 231 dsty = dPriv->y + (dPriv->h - dsty - height); 232 dstx = dPriv->x + dstx; 233 234 dest_rect.x1 = dstx < 0 ? 0 : dstx; 235 dest_rect.y1 = dsty < 0 ? 0 : dsty; 236 dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width; 237 dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height; 238 239 for (i = 0; i < nbox; i++) { 240 drm_clip_rect_t rect; 241 int box_w, box_h; 242 GLint px, py; 243 GLuint stipple[32]; 244 245 if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i])) 246 continue; 247 248 /* Now go back to GL coordinates to figure out what subset of 249 * the bitmap we are uploading for this cliprect: 250 */ 251 box_w = rect.x2 - rect.x1; 252 box_h = rect.y2 - rect.y1; 253 srcx = rect.x1 - orig_screen_x1; 254 srcy = orig_screen_y2 - rect.y2; 255 256 257#define DY 32 258#define DX 32 259 260 /* Then, finally, chop it all into chunks that can be 261 * digested by hardware: 262 */ 263 for (py = 0; py < box_h; py += DY) { 264 for (px = 0; px < box_w; px += DX) { 265 int h = MIN2(DY, box_h - py); 266 int w = MIN2(DX, box_w - px); 267 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 268 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 269 ctx->Color.LogicOp : GL_COPY; 270 271 assert(sz <= sizeof(stipple)); 272 memset(stipple, 0, sz); 273 274 /* May need to adjust this when padding has been introduced in 275 * sz above: 276 */ 277 if (get_bitmap_rect(width, height, unpack, 278 bitmap, 279 srcx + px, srcy + py, w, h, 280 (GLubyte *)stipple, 281 8, 282 GL_TRUE) == 0) 283 continue; 284 285 /* 286 */ 287 intelEmitImmediateColorExpandBlit( intel, 288 dst->cpp, 289 (GLubyte *)stipple, 290 sz, 291 (dst->cpp == 2) ? color565 : color8888, 292 dst->pitch, 293 dst->buffer, 294 0, 295 dst->tiling, 296 rect.x1 + px, 297 rect.y2 - (py + h), 298 w, h, 299 logic_op); 300 } 301 } 302 } 303 } 304out: 305 UNLOCK_HARDWARE(intel); 306 307 308 if (unpack->BufferObj->Name) { 309 /* done with PBO so unmap it now */ 310 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 311 unpack->BufferObj); 312 } 313 314 return GL_TRUE; 315} 316 317 318 319 320 321/* There are a large number of possible ways to implement bitmap on 322 * this hardware, most of them have some sort of drawback. Here are a 323 * few that spring to mind: 324 * 325 * Blit: 326 * - XY_MONO_SRC_BLT_CMD 327 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 328 * - XY_TEXT_BLT 329 * - XY_TEXT_IMMEDIATE_BLT 330 * - blit per cliprect, subject to maximum immediate data size. 331 * - XY_COLOR_BLT 332 * - per pixel or run of pixels 333 * - XY_PIXEL_BLT 334 * - good for sparse bitmaps 335 * 336 * 3D engine: 337 * - Point per pixel 338 * - Translate bitmap to an alpha texture and render as a quad 339 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 340 */ 341void 342intelBitmap(GLcontext * ctx, 343 GLint x, GLint y, 344 GLsizei width, GLsizei height, 345 const struct gl_pixelstore_attrib *unpack, 346 const GLubyte * pixels) 347{ 348 if (do_blit_bitmap(ctx, x, y, width, height, 349 unpack, pixels)) 350 return; 351 352 if (INTEL_DEBUG & DEBUG_PIXEL) 353 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 354 355 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 356} 357