intel_pixel_bitmap.c revision 9e68e191ac9d32f2f93e840a66127e724b442756
19e68e191ac9d32f2f93e840a66127e724b442756Eric Anholt/************************************************************************** 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 45 46 47#define FILE_DEBUG_FLAG DEBUG_PIXEL 48 49 50/* Unlike the other intel_pixel_* functions, the expectation here is 51 * that the incoming data is not in a PBO. With the XY_TEXT blit 52 * method, there's no benefit haveing it in a PBO, but we could 53 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 54 * PBO bitmaps. I think they are probably pretty rare though - I 55 * wonder if Xgl uses them? 56 */ 57static const GLubyte *map_pbo( GLcontext *ctx, 58 GLsizei width, GLsizei height, 59 const struct gl_pixelstore_attrib *unpack, 60 const GLubyte *bitmap ) 61{ 62 GLubyte *buf; 63 64 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 65 GL_COLOR_INDEX, GL_BITMAP, 66 (GLvoid *) bitmap)) { 67 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 68 return NULL; 69 } 70 71 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 72 GL_READ_ONLY_ARB, 73 unpack->BufferObj); 74 if (!buf) { 75 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 76 return NULL; 77 } 78 79 return ADD_POINTERS(buf, bitmap); 80} 81 82static GLboolean test_bit( const GLubyte *src, 83 GLuint bit ) 84{ 85 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 86} 87 88static void set_bit( GLubyte *dest, 89 GLuint bit ) 90{ 91 dest[bit/8] |= 1 << (bit % 8); 92} 93 94/* Extract a rectangle's worth of data from the bitmap. Called 95 * per-cliprect. 96 */ 97static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 98 const struct gl_pixelstore_attrib *unpack, 99 const GLubyte *bitmap, 100 GLuint x, GLuint y, 101 GLuint w, GLuint h, 102 GLubyte *dest, 103 GLuint row_align, 104 GLboolean invert) 105{ 106 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 107 GLuint mask = unpack->LsbFirst ? 0 : 7; 108 GLuint bit = 0; 109 GLint row, col; 110 GLint first, last; 111 GLint incr; 112 GLuint count = 0; 113 114 if (INTEL_DEBUG & DEBUG_PIXEL) 115 _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 116 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 117 118 if (invert) { 119 first = h-1; 120 last = 0; 121 incr = -1; 122 } 123 else { 124 first = 0; 125 last = h-1; 126 incr = 1; 127 } 128 129 /* Require that dest be pre-zero'd. 130 */ 131 for (row = first; row != (last+incr); row += incr) { 132 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 133 width, height, 134 GL_COLOR_INDEX, GL_BITMAP, 135 y + row, x); 136 137 for (col = 0; col < w; col++, bit++) { 138 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 139 set_bit(dest, bit ^ 7); 140 count++; 141 } 142 } 143 144 if (row_align) 145 bit = ALIGN(bit, row_align); 146 } 147 148 return count; 149} 150 151 152 153 154/* 155 * Render a bitmap. 156 */ 157static GLboolean 158do_blit_bitmap( GLcontext *ctx, 159 GLint dstx, GLint dsty, 160 GLsizei width, GLsizei height, 161 const struct gl_pixelstore_attrib *unpack, 162 const GLubyte *bitmap ) 163{ 164 struct intel_context *intel = intel_context(ctx); 165 struct intel_region *dst = intel_drawbuf_region(intel); 166 GLfloat tmpColor[4]; 167 168 union { 169 GLuint ui; 170 GLubyte ub[4]; 171 } color; 172 173 if (!dst) 174 return GL_FALSE; 175 176 if (unpack->BufferObj->Name) { 177 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 178 if (bitmap == NULL) 179 return GL_TRUE; /* even though this is an error, we're done */ 180 } 181 182 COPY_4V(tmpColor, ctx->Current.RasterColor); 183 184 if (NEED_SECONDARY_COLOR(ctx)) { 185 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 186 } 187 188 UNCLAMPED_FLOAT_TO_CHAN(color.ub[0], tmpColor[2]); 189 UNCLAMPED_FLOAT_TO_CHAN(color.ub[1], tmpColor[1]); 190 UNCLAMPED_FLOAT_TO_CHAN(color.ub[2], tmpColor[0]); 191 UNCLAMPED_FLOAT_TO_CHAN(color.ub[3], tmpColor[3]); 192 193 /* Does zoom apply to bitmaps? 194 */ 195 if (!intel_check_blit_fragment_ops(ctx) || 196 ctx->Pixel.ZoomX != 1.0F || 197 ctx->Pixel.ZoomY != 1.0F) 198 return GL_FALSE; 199 200 LOCK_HARDWARE(intel); 201 202 if (intel->driDrawable->numClipRects) { 203 __DRIdrawablePrivate *dPriv = intel->driDrawable; 204 drm_clip_rect_t *box = dPriv->pClipRects; 205 drm_clip_rect_t dest_rect; 206 GLint nbox = dPriv->numClipRects; 207 GLint srcx = 0, srcy = 0; 208 GLint orig_screen_x1, orig_screen_y2; 209 GLuint i; 210 211 212 orig_screen_x1 = dPriv->x + dstx; 213 orig_screen_y2 = dPriv->y + (dPriv->h - dsty); 214 215 /* Do scissoring in GL coordinates: 216 */ 217 if (ctx->Scissor.Enabled) 218 { 219 GLint x = ctx->Scissor.X; 220 GLint y = ctx->Scissor.Y; 221 GLuint w = ctx->Scissor.Width; 222 GLuint h = ctx->Scissor.Height; 223 224 if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height)) 225 goto out; 226 } 227 228 /* Convert from GL to hardware coordinates: 229 */ 230 dsty = dPriv->y + (dPriv->h - dsty - height); 231 dstx = dPriv->x + dstx; 232 233 dest_rect.x1 = dstx < 0 ? 0 : dstx; 234 dest_rect.y1 = dsty < 0 ? 0 : dsty; 235 dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width; 236 dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height; 237 238 for (i = 0; i < nbox; i++) { 239 drm_clip_rect_t rect; 240 int box_w, box_h; 241 GLint px, py; 242 GLuint stipple[32]; 243 244 if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i])) 245 continue; 246 247 /* Now go back to GL coordinates to figure out what subset of 248 * the bitmap we are uploading for this cliprect: 249 */ 250 box_w = rect.x2 - rect.x1; 251 box_h = rect.y2 - rect.y1; 252 srcx = rect.x1 - orig_screen_x1; 253 srcy = orig_screen_y2 - rect.y2; 254 255 256#define DY 32 257#define DX 32 258 259 /* Then, finally, chop it all into chunks that can be 260 * digested by hardware: 261 */ 262 for (py = 0; py < box_h; py += DY) { 263 for (px = 0; px < box_w; px += DX) { 264 int h = MIN2(DY, box_h - py); 265 int w = MIN2(DX, box_w - px); 266 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 267 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 268 ctx->Color.LogicOp : GL_COPY; 269 270 assert(sz <= sizeof(stipple)); 271 memset(stipple, 0, sz); 272 273 /* May need to adjust this when padding has been introduced in 274 * sz above: 275 */ 276 if (get_bitmap_rect(width, height, unpack, 277 bitmap, 278 srcx + px, srcy + py, w, h, 279 (GLubyte *)stipple, 280 8, 281 GL_TRUE) == 0) 282 continue; 283 284 /* 285 */ 286 intelEmitImmediateColorExpandBlit( intel, 287 dst->cpp, 288 (GLubyte *)stipple, 289 sz, 290 color.ui, 291 dst->pitch, 292 dst->buffer, 293 0, 294 dst->tiled, 295 rect.x1 + px, 296 rect.y2 - (py + h), 297 w, h, 298 logic_op); 299 } 300 } 301 } 302 intel->need_flush = GL_TRUE; 303 out: 304 intel_batchbuffer_flush(intel->batch); 305 } 306 UNLOCK_HARDWARE(intel); 307 308 309 if (unpack->BufferObj->Name) { 310 /* done with PBO so unmap it now */ 311 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 312 unpack->BufferObj); 313 } 314 315 return GL_TRUE; 316} 317 318 319 320 321 322/* There are a large number of possible ways to implement bitmap on 323 * this hardware, most of them have some sort of drawback. Here are a 324 * few that spring to mind: 325 * 326 * Blit: 327 * - XY_MONO_SRC_BLT_CMD 328 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 329 * - XY_TEXT_BLT 330 * - XY_TEXT_IMMEDIATE_BLT 331 * - blit per cliprect, subject to maximum immediate data size. 332 * - XY_COLOR_BLT 333 * - per pixel or run of pixels 334 * - XY_PIXEL_BLT 335 * - good for sparse bitmaps 336 * 337 * 3D engine: 338 * - Point per pixel 339 * - Translate bitmap to an alpha texture and render as a quad 340 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 341 */ 342void 343intelBitmap(GLcontext * ctx, 344 GLint x, GLint y, 345 GLsizei width, GLsizei height, 346 const struct gl_pixelstore_attrib *unpack, 347 const GLubyte * pixels) 348{ 349 if (do_blit_bitmap(ctx, x, y, width, height, 350 unpack, pixels)) 351 return; 352 353 if (INTEL_DEBUG & DEBUG_PIXEL) 354 _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); 355 356 _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels); 357} 358