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/condrender.h" 33 #include "main/mtypes.h" 34 #include "main/macros.h" 35 #include "main/pbo.h" 36 #include "main/bufferobj.h" 37 #include "main/state.h" 38 #include "main/texobj.h" 39 #include "main/context.h" 40 #include "main/fbobject.h" 41 #include "swrast/swrast.h" 42 #include "drivers/common/meta.h" 43 44 #include "intel_screen.h" 45 #include "intel_context.h" 46 #include "intel_batchbuffer.h" 47 #include "intel_blit.h" 48 #include "intel_regions.h" 49 #include "intel_buffers.h" 50 #include "intel_pixel.h" 51 #include "intel_reg.h" 52 53 54 #define FILE_DEBUG_FLAG DEBUG_PIXEL 55 56 57 /* Unlike the other intel_pixel_* functions, the expectation here is 58 * that the incoming data is not in a PBO. With the XY_TEXT blit 59 * method, there's no benefit haveing it in a PBO, but we could 60 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 61 * PBO bitmaps. I think they are probably pretty rare though - I 62 * wonder if Xgl uses them? 63 */ 64 static const GLubyte *map_pbo( struct gl_context *ctx, 65 GLsizei width, GLsizei height, 66 const struct gl_pixelstore_attrib *unpack, 67 const GLubyte *bitmap ) 68 { 69 GLubyte *buf; 70 71 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 72 GL_COLOR_INDEX, GL_BITMAP, 73 INT_MAX, (const GLvoid *) bitmap)) { 74 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 75 return NULL; 76 } 77 78 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size, 79 GL_MAP_READ_BIT, 80 unpack->BufferObj); 81 if (!buf) { 82 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 83 return NULL; 84 } 85 86 return ADD_POINTERS(buf, bitmap); 87 } 88 89 static bool test_bit( const GLubyte *src, GLuint bit ) 90 { 91 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 92 } 93 94 static void set_bit( GLubyte *dest, GLuint bit ) 95 { 96 dest[bit/8] |= 1 << (bit % 8); 97 } 98 99 /* Extract a rectangle's worth of data from the bitmap. Called 100 * per chunk of HW-sized bitmap. 101 */ 102 static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 103 const struct gl_pixelstore_attrib *unpack, 104 const GLubyte *bitmap, 105 GLuint x, GLuint y, 106 GLuint w, GLuint h, 107 GLubyte *dest, 108 GLuint row_align, 109 bool invert) 110 { 111 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 112 GLuint mask = unpack->LsbFirst ? 0 : 7; 113 GLuint bit = 0; 114 GLint row, col; 115 GLint first, last; 116 GLint incr; 117 GLuint count = 0; 118 119 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 120 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 121 122 if (invert) { 123 first = h-1; 124 last = 0; 125 incr = -1; 126 } 127 else { 128 first = 0; 129 last = h-1; 130 incr = 1; 131 } 132 133 /* Require that dest be pre-zero'd. 134 */ 135 for (row = first; row != (last+incr); row += incr) { 136 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 137 width, height, 138 GL_COLOR_INDEX, GL_BITMAP, 139 y + row, x); 140 141 for (col = 0; col < w; col++, bit++) { 142 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 143 set_bit(dest, bit ^ 7); 144 count++; 145 } 146 } 147 148 if (row_align) 149 bit = ALIGN(bit, row_align); 150 } 151 152 return count; 153 } 154 155 /** 156 * Returns the low Y value of the vertical range given, flipped according to 157 * whether the framebuffer is or not. 158 */ 159 static INLINE int 160 y_flip(struct gl_framebuffer *fb, int y, int height) 161 { 162 if (_mesa_is_user_fbo(fb)) 163 return y; 164 else 165 return fb->Height - y - height; 166 } 167 168 /* 169 * Render a bitmap. 170 */ 171 static bool 172 do_blit_bitmap( struct gl_context *ctx, 173 GLint dstx, GLint dsty, 174 GLsizei width, GLsizei height, 175 const struct gl_pixelstore_attrib *unpack, 176 const GLubyte *bitmap ) 177 { 178 struct intel_context *intel = intel_context(ctx); 179 struct intel_region *dst; 180 struct gl_framebuffer *fb = ctx->DrawBuffer; 181 GLfloat tmpColor[4]; 182 GLubyte ubcolor[4]; 183 GLuint color; 184 GLsizei bitmap_width = width; 185 GLsizei bitmap_height = height; 186 GLint px, py; 187 GLuint stipple[32]; 188 GLint orig_dstx = dstx; 189 GLint orig_dsty = dsty; 190 191 /* Update draw buffer bounds */ 192 _mesa_update_state(ctx); 193 194 if (ctx->Depth.Test) { 195 /* The blit path produces incorrect results when depth testing is on. 196 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 197 * will likely be obscured by other, closer geometry. 198 */ 199 return false; 200 } 201 202 intel_prepare_render(intel); 203 dst = intel_drawbuf_region(intel); 204 205 if (!dst) 206 return false; 207 208 if (_mesa_is_bufferobj(unpack->BufferObj)) { 209 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 210 if (bitmap == NULL) 211 return true; /* even though this is an error, we're done */ 212 } 213 214 COPY_4V(tmpColor, ctx->Current.RasterColor); 215 216 if (_mesa_need_secondary_color(ctx)) { 217 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 218 } 219 220 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 221 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 222 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 223 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 224 225 if (dst->cpp == 2) 226 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 227 else 228 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 229 230 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 231 return false; 232 233 /* Clip to buffer bounds and scissor. */ 234 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 235 fb->_Xmax, fb->_Ymax, 236 &dstx, &dsty, &width, &height)) 237 goto out; 238 239 dsty = y_flip(fb, dsty, height); 240 241 #define DY 32 242 #define DX 32 243 244 /* Chop it all into chunks that can be digested by hardware: */ 245 for (py = 0; py < height; py += DY) { 246 for (px = 0; px < width; px += DX) { 247 int h = MIN2(DY, height - py); 248 int w = MIN2(DX, width - px); 249 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 250 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 251 ctx->Color.LogicOp : GL_COPY; 252 253 assert(sz <= sizeof(stipple)); 254 memset(stipple, 0, sz); 255 256 /* May need to adjust this when padding has been introduced in 257 * sz above: 258 * 259 * Have to translate destination coordinates back into source 260 * coordinates. 261 */ 262 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 263 bitmap, 264 -orig_dstx + (dstx + px), 265 -orig_dsty + y_flip(fb, dsty + py, h), 266 w, h, 267 (GLubyte *)stipple, 268 8, 269 _mesa_is_winsys_fbo(fb)) == 0) 270 continue; 271 272 if (!intelEmitImmediateColorExpandBlit(intel, 273 dst->cpp, 274 (GLubyte *)stipple, 275 sz, 276 color, 277 dst->pitch, 278 dst->bo, 279 0, 280 dst->tiling, 281 dstx + px, 282 dsty + py, 283 w, h, 284 logic_op)) { 285 return false; 286 } 287 } 288 } 289 out: 290 291 if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) 292 intel_batchbuffer_flush(intel); 293 294 if (_mesa_is_bufferobj(unpack->BufferObj)) { 295 /* done with PBO so unmap it now */ 296 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj); 297 } 298 299 intel_check_front_buffer_rendering(intel); 300 301 return true; 302 } 303 304 305 /* There are a large number of possible ways to implement bitmap on 306 * this hardware, most of them have some sort of drawback. Here are a 307 * few that spring to mind: 308 * 309 * Blit: 310 * - XY_MONO_SRC_BLT_CMD 311 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 312 * - XY_TEXT_BLT 313 * - XY_TEXT_IMMEDIATE_BLT 314 * - blit per cliprect, subject to maximum immediate data size. 315 * - XY_COLOR_BLT 316 * - per pixel or run of pixels 317 * - XY_PIXEL_BLT 318 * - good for sparse bitmaps 319 * 320 * 3D engine: 321 * - Point per pixel 322 * - Translate bitmap to an alpha texture and render as a quad 323 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 324 */ 325 void 326 intelBitmap(struct gl_context * ctx, 327 GLint x, GLint y, 328 GLsizei width, GLsizei height, 329 const struct gl_pixelstore_attrib *unpack, 330 const GLubyte * pixels) 331 { 332 if (!_mesa_check_conditional_render(ctx)) 333 return; 334 335 if (do_blit_bitmap(ctx, x, y, width, height, 336 unpack, pixels)) 337 return; 338 339 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels); 340 } 341
