1 /************************************************************************** 2 * 3 * Copyright 2006 VMware, Inc. 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 VMWARE 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_fbo.h" 49 #include "intel_regions.h" 50 #include "intel_buffers.h" 51 #include "intel_pixel.h" 52 #include "intel_reg.h" 53 54 55 #define FILE_DEBUG_FLAG DEBUG_PIXEL 56 57 58 /* Unlike the other intel_pixel_* functions, the expectation here is 59 * that the incoming data is not in a PBO. With the XY_TEXT blit 60 * method, there's no benefit haveing it in a PBO, but we could 61 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 62 * PBO bitmaps. I think they are probably pretty rare though - I 63 * wonder if Xgl uses them? 64 */ 65 static const GLubyte *map_pbo( struct gl_context *ctx, 66 GLsizei width, GLsizei height, 67 const struct gl_pixelstore_attrib *unpack, 68 const GLubyte *bitmap ) 69 { 70 GLubyte *buf; 71 72 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 73 GL_COLOR_INDEX, GL_BITMAP, 74 INT_MAX, (const GLvoid *) bitmap)) { 75 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 76 return NULL; 77 } 78 79 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size, 80 GL_MAP_READ_BIT, 81 unpack->BufferObj, 82 MAP_INTERNAL); 83 if (!buf) { 84 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 85 return NULL; 86 } 87 88 return ADD_POINTERS(buf, bitmap); 89 } 90 91 static bool test_bit( const GLubyte *src, GLuint bit ) 92 { 93 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 94 } 95 96 static void set_bit( GLubyte *dest, GLuint bit ) 97 { 98 dest[bit/8] |= 1 << (bit % 8); 99 } 100 101 /* Extract a rectangle's worth of data from the bitmap. Called 102 * per chunk of HW-sized bitmap. 103 */ 104 static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 105 const struct gl_pixelstore_attrib *unpack, 106 const GLubyte *bitmap, 107 GLuint x, GLuint y, 108 GLuint w, GLuint h, 109 GLubyte *dest, 110 GLuint row_align, 111 bool invert) 112 { 113 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 114 GLuint mask = unpack->LsbFirst ? 0 : 7; 115 GLuint bit = 0; 116 GLint row, col; 117 GLint first, last; 118 GLint incr; 119 GLuint count = 0; 120 121 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 122 __func__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 123 124 if (invert) { 125 first = h-1; 126 last = 0; 127 incr = -1; 128 } 129 else { 130 first = 0; 131 last = h-1; 132 incr = 1; 133 } 134 135 /* Require that dest be pre-zero'd. 136 */ 137 for (row = first; row != (last+incr); row += incr) { 138 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 139 width, height, 140 GL_COLOR_INDEX, GL_BITMAP, 141 y + row, x); 142 143 for (col = 0; col < w; col++, bit++) { 144 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 145 set_bit(dest, bit ^ 7); 146 count++; 147 } 148 } 149 150 if (row_align) 151 bit = ALIGN(bit, row_align); 152 } 153 154 return count; 155 } 156 157 /** 158 * Returns the low Y value of the vertical range given, flipped according to 159 * whether the framebuffer is or not. 160 */ 161 static inline int 162 y_flip(struct gl_framebuffer *fb, int y, int height) 163 { 164 if (_mesa_is_user_fbo(fb)) 165 return y; 166 else 167 return fb->Height - y - height; 168 } 169 170 /* 171 * Render a bitmap. 172 */ 173 static bool 174 do_blit_bitmap( struct gl_context *ctx, 175 GLint dstx, GLint dsty, 176 GLsizei width, GLsizei height, 177 const struct gl_pixelstore_attrib *unpack, 178 const GLubyte *bitmap ) 179 { 180 struct intel_context *intel = intel_context(ctx); 181 struct gl_framebuffer *fb = ctx->DrawBuffer; 182 struct intel_renderbuffer *irb; 183 GLfloat tmpColor[4]; 184 GLubyte ubcolor[4]; 185 GLuint color; 186 GLsizei bitmap_width = width; 187 GLsizei bitmap_height = height; 188 GLint px, py; 189 GLuint stipple[32]; 190 GLint orig_dstx = dstx; 191 GLint orig_dsty = dsty; 192 193 /* Update draw buffer bounds */ 194 _mesa_update_state(ctx); 195 196 if (ctx->Depth.Test) { 197 /* The blit path produces incorrect results when depth testing is on. 198 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 199 * will likely be obscured by other, closer geometry. 200 */ 201 return false; 202 } 203 204 intel_prepare_render(intel); 205 206 if (fb->_NumColorDrawBuffers != 1) { 207 perf_debug("accelerated glBitmap() only supports rendering to a " 208 "single color buffer\n"); 209 return false; 210 } 211 212 irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]); 213 214 if (_mesa_is_bufferobj(unpack->BufferObj)) { 215 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 216 if (bitmap == NULL) 217 return true; /* even though this is an error, we're done */ 218 } 219 220 COPY_4V(tmpColor, ctx->Current.RasterColor); 221 222 if (_mesa_need_secondary_color(ctx)) { 223 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor); 224 } 225 226 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]); 227 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]); 228 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]); 229 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]); 230 231 switch (irb->mt->format) { 232 case MESA_FORMAT_B8G8R8A8_UNORM: 233 case MESA_FORMAT_B8G8R8X8_UNORM: 234 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 235 break; 236 case MESA_FORMAT_B5G6R5_UNORM: 237 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 238 break; 239 default: 240 perf_debug("Unsupported format %s in accelerated glBitmap()\n", 241 _mesa_get_format_name(irb->mt->format)); 242 return false; 243 } 244 245 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 246 return false; 247 248 /* Clip to buffer bounds and scissor. */ 249 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 250 fb->_Xmax, fb->_Ymax, 251 &dstx, &dsty, &width, &height)) 252 goto out; 253 254 dsty = y_flip(fb, dsty, height); 255 256 #define DY 32 257 #define DX 32 258 259 /* Chop it all into chunks that can be digested by hardware: */ 260 for (py = 0; py < height; py += DY) { 261 for (px = 0; px < width; px += DX) { 262 int h = MIN2(DY, height - py); 263 int w = MIN2(DX, width - px); 264 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 265 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 266 ctx->Color.LogicOp : GL_COPY; 267 268 assert(sz <= sizeof(stipple)); 269 memset(stipple, 0, sz); 270 271 /* May need to adjust this when padding has been introduced in 272 * sz above: 273 * 274 * Have to translate destination coordinates back into source 275 * coordinates. 276 */ 277 int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack, 278 bitmap, 279 -orig_dstx + (dstx + px), 280 -orig_dsty + y_flip(fb, dsty + py, h), 281 w, h, 282 (GLubyte *)stipple, 283 8, 284 _mesa_is_winsys_fbo(fb)); 285 if (count == 0) 286 continue; 287 288 if (!intelEmitImmediateColorExpandBlit(intel, 289 irb->mt->cpp, 290 (GLubyte *)stipple, 291 sz, 292 color, 293 irb->mt->region->pitch, 294 irb->mt->region->bo, 295 0, 296 irb->mt->region->tiling, 297 dstx + px, 298 dsty + py, 299 w, h, 300 logic_op)) { 301 return false; 302 } 303 304 if (ctx->Query.CurrentOcclusionObject) 305 ctx->Query.CurrentOcclusionObject->Result += count; 306 } 307 } 308 out: 309 310 if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) 311 intel_batchbuffer_flush(intel); 312 313 if (_mesa_is_bufferobj(unpack->BufferObj)) { 314 /* done with PBO so unmap it now */ 315 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL); 316 } 317 318 intel_check_front_buffer_rendering(intel); 319 320 return true; 321 } 322 323 324 /* There are a large number of possible ways to implement bitmap on 325 * this hardware, most of them have some sort of drawback. Here are a 326 * few that spring to mind: 327 * 328 * Blit: 329 * - XY_MONO_SRC_BLT_CMD 330 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 331 * - XY_TEXT_BLT 332 * - XY_TEXT_IMMEDIATE_BLT 333 * - blit per cliprect, subject to maximum immediate data size. 334 * - XY_COLOR_BLT 335 * - per pixel or run of pixels 336 * - XY_PIXEL_BLT 337 * - good for sparse bitmaps 338 * 339 * 3D engine: 340 * - Point per pixel 341 * - Translate bitmap to an alpha texture and render as a quad 342 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 343 */ 344 void 345 intelBitmap(struct gl_context * ctx, 346 GLint x, GLint y, 347 GLsizei width, GLsizei height, 348 const struct gl_pixelstore_attrib *unpack, 349 const GLubyte * pixels) 350 { 351 if (!_mesa_check_conditional_render(ctx)) 352 return; 353 354 if (do_blit_bitmap(ctx, x, y, width, height, 355 unpack, pixels)) 356 return; 357 358 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels); 359 } 360
