intel_pixel_bitmap.c revision 7c81124d7c4a4d1da9f48cbf7e82ab1a3a970a7a
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_ioctl.h" 40#include "intel_batchbuffer.h" 41#include "intel_blit.h" 42#include "intel_regions.h" 43#include "intel_buffer_objects.h" 44#include "intel_buffers.h" 45#include "intel_pixel.h" 46 47 48 49#define FILE_DEBUG_FLAG DEBUG_PIXEL 50 51 52/* Unlike the other intel_pixel_* functions, the expectation here is 53 * that the incoming data is not in a PBO. With the XY_TEXT blit 54 * method, there's no benefit haveing it in a PBO, but we could 55 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 56 * PBO bitmaps. I think they are probably pretty rare though - I 57 * wonder if Xgl uses them? 58 */ 59static const GLubyte *map_pbo( GLcontext *ctx, 60 GLsizei width, GLsizei height, 61 const struct gl_pixelstore_attrib *unpack, 62 const GLubyte *bitmap ) 63{ 64 GLubyte *buf; 65 66 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 67 GL_COLOR_INDEX, GL_BITMAP, 68 (GLvoid *) bitmap)) { 69 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 70 return NULL; 71 } 72 73 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 74 GL_READ_ONLY_ARB, 75 unpack->BufferObj); 76 if (!buf) { 77 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 78 return NULL; 79 } 80 81 return ADD_POINTERS(buf, bitmap); 82} 83 84static GLboolean test_bit( const GLubyte *src, 85 GLuint bit ) 86{ 87 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 88} 89 90static void set_bit( GLubyte *dest, 91 GLuint bit ) 92{ 93 dest[bit/8] |= 1 << (bit % 8); 94} 95 96/* Extract a rectangle's worth of data from the bitmap. Called 97 * per-cliprect. 98 */ 99static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 100 const struct gl_pixelstore_attrib *unpack, 101 const GLubyte *bitmap, 102 GLuint x, GLuint y, 103 GLuint w, GLuint h, 104 GLubyte *dest, 105 GLuint row_align, 106 GLboolean invert) 107{ 108 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 109 GLuint mask = unpack->LsbFirst ? 0 : 7; 110 GLuint bit = 0; 111 GLint row, col; 112 GLint first, last; 113 GLint incr; 114 GLuint count = 0; 115 116 if (INTEL_DEBUG & DEBUG_PIXEL) 117 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 118 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 119 120 if (invert) { 121 first = h-1; 122 last = 0; 123 incr = -1; 124 } 125 else { 126 first = 0; 127 last = h-1; 128 incr = 1; 129 } 130 131 /* Require that dest be pre-zero'd. 132 */ 133 for (row = first; row != (last+incr); row += incr) { 134 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 135 width, height, 136 GL_COLOR_INDEX, GL_BITMAP, 137 y + row, x); 138 139 for (col = 0; col < w; col++, bit++) { 140 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 141 set_bit(dest, bit ^ 7); 142 count++; 143 } 144 } 145 146 if (row_align) 147 bit = ALIGN(bit, row_align); 148 } 149 150 return count; 151} 152 153 154 155 156/* 157 * Render a bitmap. 158 */ 159static GLboolean 160do_blit_bitmap( GLcontext *ctx, 161 GLint dstx, GLint dsty, 162 GLsizei width, GLsizei height, 163 const struct gl_pixelstore_attrib *unpack, 164 const GLubyte *bitmap ) 165{ 166 struct intel_context *intel = intel_context(ctx); 167 struct intel_region *dst = intel_drawbuf_region(intel); 168 GLfloat tmpColor[4]; 169 GLubyte ubcolor[4]; 170 GLuint color8888, color565; 171 172 if (!dst) 173 return GL_FALSE; 174 175 if (unpack->BufferObj->Name) { 176 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 177 if (bitmap == NULL) 178 return GL_TRUE; /* even though this is an error, we're done */ 179 } 180 181 COPY_4V(tmpColor, ctx->Current.RasterColor); 182 183 if (NEED_SECONDARY_COLOR(ctx)) { 184 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 185 } 186 187 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 188 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 189 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 190 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 191 192 color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]); 193 color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]); 194 195 /* Does zoom apply to bitmaps? 196 */ 197 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F) || 198 ctx->Pixel.ZoomX != 1.0F || 199 ctx->Pixel.ZoomY != 1.0F) 200 return GL_FALSE; 201 202 LOCK_HARDWARE(intel); 203 204 if (intel->driDrawable->numClipRects) { 205 __DRIdrawablePrivate *dPriv = intel->driDrawable; 206 drm_clip_rect_t *box = dPriv->pClipRects; 207 drm_clip_rect_t dest_rect; 208 GLint nbox = dPriv->numClipRects; 209 GLint srcx = 0, srcy = 0; 210 GLint orig_screen_x1, orig_screen_y2; 211 GLuint i; 212 213 214 orig_screen_x1 = dPriv->x + dstx; 215 orig_screen_y2 = dPriv->y + (dPriv->h - dsty); 216 217 /* Do scissoring in GL coordinates: 218 */ 219 if (ctx->Scissor.Enabled) 220 { 221 GLint x = ctx->Scissor.X; 222 GLint y = ctx->Scissor.Y; 223 GLuint w = ctx->Scissor.Width; 224 GLuint h = ctx->Scissor.Height; 225 226 if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height)) 227 goto out; 228 } 229 230 /* Convert from GL to hardware coordinates: 231 */ 232 dsty = dPriv->y + (dPriv->h - dsty - height); 233 dstx = dPriv->x + dstx; 234 235 dest_rect.x1 = dstx < 0 ? 0 : dstx; 236 dest_rect.y1 = dsty < 0 ? 0 : dsty; 237 dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width; 238 dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height; 239 240 for (i = 0; i < nbox; i++) { 241 drm_clip_rect_t rect; 242 int box_w, box_h; 243 GLint px, py; 244 GLuint stipple[32]; 245 246 if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i])) 247 continue; 248 249 /* Now go back to GL coordinates to figure out what subset of 250 * the bitmap we are uploading for this cliprect: 251 */ 252 box_w = rect.x2 - rect.x1; 253 box_h = rect.y2 - rect.y1; 254 srcx = rect.x1 - orig_screen_x1; 255 srcy = orig_screen_y2 - rect.y2; 256 257 258#define DY 32 259#define DX 32 260 261 /* Then, finally, chop it all into chunks that can be 262 * digested by hardware: 263 */ 264 for (py = 0; py < box_h; py += DY) { 265 for (px = 0; px < box_w; px += DX) { 266 int h = MIN2(DY, box_h - py); 267 int w = MIN2(DX, box_w - px); 268 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 269 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 270 ctx->Color.LogicOp : GL_COPY; 271 272 assert(sz <= sizeof(stipple)); 273 memset(stipple, 0, sz); 274 275 /* May need to adjust this when padding has been introduced in 276 * sz above: 277 */ 278 if (get_bitmap_rect(width, height, unpack, 279 bitmap, 280 srcx + px, srcy + py, w, h, 281 (GLubyte *)stipple, 282 8, 283 GL_TRUE) == 0) 284 continue; 285 286 /* 287 */ 288 intelEmitImmediateColorExpandBlit( intel, 289 dst->cpp, 290 (GLubyte *)stipple, 291 sz, 292 (dst->cpp == 2) ? color565 : color8888, 293 dst->pitch, 294 dst->buffer, 295 0, 296 dst->tiled, 297 rect.x1 + px, 298 rect.y2 - (py + h), 299 w, h, 300 logic_op); 301 } 302 } 303 } 304 out: 305 intel_batchbuffer_flush(intel->batch); 306 } 307 UNLOCK_HARDWARE(intel); 308 309 310 if (unpack->BufferObj->Name) { 311 /* done with PBO so unmap it now */ 312 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 313 unpack->BufferObj); 314 } 315 316 return GL_TRUE; 317} 318 319 320 321 322 323/* There are a large number of possible ways to implement bitmap on 324 * this hardware, most of them have some sort of drawback. Here are a 325 * few that spring to mind: 326 * 327 * Blit: 328 * - XY_MONO_SRC_BLT_CMD 329 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 330 * - XY_TEXT_BLT 331 * - XY_TEXT_IMMEDIATE_BLT 332 * - blit per cliprect, subject to maximum immediate data size. 333 * - XY_COLOR_BLT 334 * - per pixel or run of pixels 335 * - XY_PIXEL_BLT 336 * - good for sparse bitmaps 337 * 338 * 3D engine: 339 * - Point per pixel 340 * - Translate bitmap to an alpha texture and render as a quad 341 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 342 */ 343void 344intelBitmap(GLcontext * ctx, 345 GLint x, GLint y, 346 GLsizei width, GLsizei height, 347 const struct gl_pixelstore_attrib *unpack, 348 const GLubyte * pixels) 349{ 350 if (do_blit_bitmap(ctx, x, y, width, height, 351 unpack, pixels)) 352 return; 353 354 if (INTEL_DEBUG & DEBUG_PIXEL) 355 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 356 357 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 358} 359