intel_pixel_bitmap.c revision ef1e1261df02203da4c7ebf708b0edf1b9cd16c2
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/arbprogram.h" 30#include "main/enums.h" 31#include "main/image.h" 32#include "main/colormac.h" 33#include "main/mtypes.h" 34#include "main/macros.h" 35#include "main/bufferobj.h" 36#include "main/polygon.h" 37#include "main/pixelstore.h" 38#include "main/polygon.h" 39#include "main/state.h" 40#include "main/teximage.h" 41#include "main/texobj.h" 42#include "main/texstate.h" 43#include "main/texparam.h" 44#include "main/varray.h" 45#include "main/attrib.h" 46#include "main/enable.h" 47#include "main/viewport.h" 48#include "main/context.h" 49#include "swrast/swrast.h" 50#include "drivers/common/meta.h" 51 52#include "intel_screen.h" 53#include "intel_context.h" 54#include "intel_batchbuffer.h" 55#include "intel_blit.h" 56#include "intel_regions.h" 57#include "intel_buffers.h" 58#include "intel_pixel.h" 59#include "intel_reg.h" 60 61 62#define FILE_DEBUG_FLAG DEBUG_PIXEL 63 64 65/* Unlike the other intel_pixel_* functions, the expectation here is 66 * that the incoming data is not in a PBO. With the XY_TEXT blit 67 * method, there's no benefit haveing it in a PBO, but we could 68 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit 69 * PBO bitmaps. I think they are probably pretty rare though - I 70 * wonder if Xgl uses them? 71 */ 72static const GLubyte *map_pbo( GLcontext *ctx, 73 GLsizei width, GLsizei height, 74 const struct gl_pixelstore_attrib *unpack, 75 const GLubyte *bitmap ) 76{ 77 GLubyte *buf; 78 79 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, 80 GL_COLOR_INDEX, GL_BITMAP, 81 (GLvoid *) bitmap)) { 82 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)"); 83 return NULL; 84 } 85 86 buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 87 GL_READ_ONLY_ARB, 88 unpack->BufferObj); 89 if (!buf) { 90 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 91 return NULL; 92 } 93 94 return ADD_POINTERS(buf, bitmap); 95} 96 97static GLboolean test_bit( const GLubyte *src, GLuint bit ) 98{ 99 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; 100} 101 102static void set_bit( GLubyte *dest, GLuint bit ) 103{ 104 dest[bit/8] |= 1 << (bit % 8); 105} 106 107/* Extract a rectangle's worth of data from the bitmap. Called 108 * per chunk of HW-sized bitmap. 109 */ 110static GLuint get_bitmap_rect(GLsizei width, GLsizei height, 111 const struct gl_pixelstore_attrib *unpack, 112 const GLubyte *bitmap, 113 GLuint x, GLuint y, 114 GLuint w, GLuint h, 115 GLubyte *dest, 116 GLuint row_align, 117 GLboolean invert) 118{ 119 GLuint src_offset = (x + unpack->SkipPixels) & 0x7; 120 GLuint mask = unpack->LsbFirst ? 0 : 7; 121 GLuint bit = 0; 122 GLint row, col; 123 GLint first, last; 124 GLint incr; 125 GLuint count = 0; 126 127 if (INTEL_DEBUG & DEBUG_PIXEL) 128 printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n", 129 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask); 130 131 if (invert) { 132 first = h-1; 133 last = 0; 134 incr = -1; 135 } 136 else { 137 first = 0; 138 last = h-1; 139 incr = 1; 140 } 141 142 /* Require that dest be pre-zero'd. 143 */ 144 for (row = first; row != (last+incr); row += incr) { 145 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 146 width, height, 147 GL_COLOR_INDEX, GL_BITMAP, 148 y + row, x); 149 150 for (col = 0; col < w; col++, bit++) { 151 if (test_bit(rowsrc, (col + src_offset) ^ mask)) { 152 set_bit(dest, bit ^ 7); 153 count++; 154 } 155 } 156 157 if (row_align) 158 bit = ALIGN(bit, row_align); 159 } 160 161 return count; 162} 163 164/** 165 * Returns the low Y value of the vertical range given, flipped according to 166 * whether the framebuffer is or not. 167 */ 168static INLINE int 169y_flip(struct gl_framebuffer *fb, int y, int height) 170{ 171 if (fb->Name != 0) 172 return y; 173 else 174 return fb->Height - y - height; 175} 176 177/* 178 * Render a bitmap. 179 */ 180static GLboolean 181do_blit_bitmap( GLcontext *ctx, 182 GLint dstx, GLint dsty, 183 GLsizei width, GLsizei height, 184 const struct gl_pixelstore_attrib *unpack, 185 const GLubyte *bitmap ) 186{ 187 struct intel_context *intel = intel_context(ctx); 188 struct intel_region *dst = intel_drawbuf_region(intel); 189 struct gl_framebuffer *fb = ctx->DrawBuffer; 190 GLfloat tmpColor[4]; 191 GLubyte ubcolor[4]; 192 GLuint color; 193 GLsizei bitmap_width = width; 194 GLsizei bitmap_height = height; 195 GLint px, py; 196 GLuint stipple[32]; 197 GLint orig_dstx = dstx; 198 GLint orig_dsty = dsty; 199 200 /* Update draw buffer bounds */ 201 _mesa_update_state(ctx); 202 203 if (ctx->Depth.Test) { 204 /* The blit path produces incorrect results when depth testing is on. 205 * It seems the blit Z coord is always 1.0 (the far plane) so fragments 206 * will likely be obscured by other, closer geometry. 207 */ 208 return GL_FALSE; 209 } 210 211 if (!dst) 212 return GL_FALSE; 213 214 if (_mesa_is_bufferobj(unpack->BufferObj)) { 215 bitmap = map_pbo(ctx, width, height, unpack, bitmap); 216 if (bitmap == NULL) 217 return GL_TRUE; /* even though this is an error, we're done */ 218 } 219 220 COPY_4V(tmpColor, ctx->Current.RasterColor); 221 222 if (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 if (dst->cpp == 2) 232 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]); 233 else 234 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]); 235 236 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F)) 237 return GL_FALSE; 238 239 intel_prepare_render(intel); 240 241 /* Clip to buffer bounds and scissor. */ 242 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 243 fb->_Xmax, fb->_Ymax, 244 &dstx, &dsty, &width, &height)) 245 goto out; 246 247 dsty = y_flip(fb, dsty, height); 248 249#define DY 32 250#define DX 32 251 252 /* Chop it all into chunks that can be digested by hardware: */ 253 for (py = 0; py < height; py += DY) { 254 for (px = 0; px < width; px += DX) { 255 int h = MIN2(DY, height - py); 256 int w = MIN2(DX, width - px); 257 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8; 258 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ? 259 ctx->Color.LogicOp : GL_COPY; 260 261 assert(sz <= sizeof(stipple)); 262 memset(stipple, 0, sz); 263 264 /* May need to adjust this when padding has been introduced in 265 * sz above: 266 * 267 * Have to translate destination coordinates back into source 268 * coordinates. 269 */ 270 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack, 271 bitmap, 272 -orig_dstx + (dstx + px), 273 -orig_dsty + y_flip(fb, dsty + py, h), 274 w, h, 275 (GLubyte *)stipple, 276 8, 277 fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0) 278 continue; 279 280 if (!intelEmitImmediateColorExpandBlit(intel, 281 dst->cpp, 282 (GLubyte *)stipple, 283 sz, 284 color, 285 dst->pitch, 286 dst->buffer, 287 0, 288 dst->tiling, 289 dstx + px, 290 dsty + py, 291 w, h, 292 logic_op)) { 293 return GL_FALSE; 294 } 295 } 296 } 297out: 298 299 if (INTEL_DEBUG & DEBUG_SYNC) 300 intel_batchbuffer_flush(intel->batch); 301 302 if (_mesa_is_bufferobj(unpack->BufferObj)) { 303 /* done with PBO so unmap it now */ 304 ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, 305 unpack->BufferObj); 306 } 307 308 intel_check_front_buffer_rendering(intel); 309 310 return GL_TRUE; 311} 312 313/* There are a large number of possible ways to implement bitmap on 314 * this hardware, most of them have some sort of drawback. Here are a 315 * few that spring to mind: 316 * 317 * Blit: 318 * - XY_MONO_SRC_BLT_CMD 319 * - use XY_SETUP_CLIP_BLT for cliprect clipping. 320 * - XY_TEXT_BLT 321 * - XY_TEXT_IMMEDIATE_BLT 322 * - blit per cliprect, subject to maximum immediate data size. 323 * - XY_COLOR_BLT 324 * - per pixel or run of pixels 325 * - XY_PIXEL_BLT 326 * - good for sparse bitmaps 327 * 328 * 3D engine: 329 * - Point per pixel 330 * - Translate bitmap to an alpha texture and render as a quad 331 * - Chop bitmap up into 32x32 squares and render w/polygon stipple. 332 */ 333void 334intelBitmap(GLcontext * ctx, 335 GLint x, GLint y, 336 GLsizei width, GLsizei height, 337 const struct gl_pixelstore_attrib *unpack, 338 const GLubyte * pixels) 339{ 340 if (do_blit_bitmap(ctx, x, y, width, height, 341 unpack, pixels)) 342 return; 343 344 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels); 345} 346