intel_pixel_bitmap.c revision cb433d91c6e198b7c77f747f1a38803532bc9be9
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 "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 struct gl_framebuffer *fb = ctx->DrawBuffer; 168 GLfloat tmpColor[4]; 169 GLubyte ubcolor[4]; 170 GLuint color8888, color565; 171 unsigned int num_cliprects; 172 drm_clip_rect_t *cliprects; 173 int x_off, y_off; 174 175 if (!dst) 176 return GL_FALSE; 177 178 if (unpack->BufferObj->Name) { 179 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 180 if (bitmap == NULL) 181 return GL_TRUE; /* even though this is an error, we're done */ 182 } 183 184 COPY_4V(tmpColor, ctx->Current.RasterColor); 185 186 if (NEED_SECONDARY_COLOR(ctx)) { 187 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 188 } 189 190 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 191 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 192 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 193 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 194 195 color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]); 196 color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]); 197 198 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 199 return GL_FALSE; 200 201 LOCK_HARDWARE(intel); 202 203 intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off); 204 if (num_cliprects != 0) { 205 drm_clip_rect_t dest_rect; 206 GLint srcx = 0, srcy = 0; 207 GLuint i; 208 GLint orig_dstx = dstx; 209 GLint orig_dsty = dsty; 210 211 /* Clip to buffer bounds and scissor. */ 212 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 213 fb->_Xmax, fb->_Ymax, 214 &dstx, &dsty, &width, &height)) 215 goto out; 216 217 /* Convert from GL to hardware coordinates. Transform original points 218 * along with it so that we can look at cliprects in hw coordinates and 219 * map back to points in the source space. 220 */ 221 if (fb->Name == 0) { 222 /* bitmap to a system framebuffer */ 223 dstx = x_off + dstx; 224 dsty = y_off + (fb->Height - dsty - height); 225 orig_dstx = x_off + orig_dstx; 226 orig_dsty = y_off + (fb->Height - orig_dsty - height); 227 } else { 228 /* bitmap to a user framebuffer object */ 229 dstx = x_off + dstx; 230 dsty = y_off + dsty; 231 orig_dstx = x_off + orig_dstx; 232 orig_dsty = y_off + orig_dsty; 233 } 234 235 dest_rect.x1 = dstx; 236 dest_rect.y1 = dsty; 237 dest_rect.x2 = dstx + width; 238 dest_rect.y2 = dsty + height; 239 240 for (i = 0; i < num_cliprects; 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, &cliprects[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_dstx; 255 srcy = rect.y1 - orig_dsty; 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 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 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 if (INTEL_DEBUG & DEBUG_SYNC) 308 intel_batchbuffer_flush(intel->batch); 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