pixman/pixman-general.c

   1 /*
   2  * Copyright © 2009 Red Hat, Inc.
   3  * Copyright © 2000 SuSE, Inc.
   4  * Copyright © 2007 Red Hat, Inc.
   5  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
   6  *             2005 Lars Knoll & Zack Rusin, Trolltech
   7  *             2008 Aaron Plattner, NVIDIA Corporation
   8  *
   9  * Permission to use, copy, modify, distribute, and sell this software and its
  10  * documentation for any purpose is hereby granted without fee, provided that
  11  * the above copyright notice appear in all copies and that both that
  12  * copyright notice and this permission notice appear in supporting
  13  * documentation, and that the name of Red Hat not be used in advertising or
  14  * publicity pertaining to distribution of the software without specific,
  15  * written prior permission.  Red Hat makes no representations about the
  16  * suitability of this software for any purpose.  It is provided "as is"
  17  * without express or implied warranty.
  18  *
  19  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  20  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  22  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  23  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  24  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  25  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  26  * SOFTWARE.
  27  */
  28 #include <config.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <math.h>
  32 #include <assert.h>
  33 #include <limits.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include "pixman-private.h"
  38 #include "pixman-combine32.h"
  39 #include "pixman-private.h"
  40
  41 #define SCANLINE_BUFFER_LENGTH 8192
  42
  43 static void
  44 general_composite_rect  (pixman_implementation_t *imp,
  45                          pixman_op_t              op,
  46                          pixman_image_t          *src,
  47                          pixman_image_t          *mask,
  48                          pixman_image_t          *dest,
  49                          int32_t                  src_x,
  50                          int32_t                  src_y,
  51                          int32_t                  mask_x,
  52                          int32_t                  mask_y,
  53                          int32_t                  dest_x,
  54                          int32_t                  dest_y,
  55                          int32_t                  width,
  56                          int32_t                  height)
  57 {
  58     return_if_fail (src != NULL);
  59     return_if_fail (dest != NULL);
  60
  61     uint8_t stack_scanline_buffer[SCANLINE_BUFFER_LENGTH * 3];
  62     const pixman_format_code_t srcFormat = src->type == BITS ? src->bits.format : 0;
  63     const pixman_format_code_t maskFormat = mask && mask->type == BITS ? mask->bits.format : 0;
  64     const pixman_format_code_t destFormat = dest->type == BITS ? dest->bits.format : 0;
  65     const int srcWide = PIXMAN_FORMAT_16BPC(srcFormat);
  66     const int maskWide = mask && PIXMAN_FORMAT_16BPC(maskFormat);
  67     const int destWide = PIXMAN_FORMAT_16BPC(destFormat);
  68     const int wide = srcWide || maskWide || destWide;
  69     const int Bpp = wide ? 8 : 4;
  70     uint8_t *scanline_buffer = stack_scanline_buffer;
  71     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
  72     scanFetchProc fetchSrc = NULL, fetchMask = NULL, fetchDest = NULL;
  73     pixman_combine_32_func_t compose;
  74     scanStoreProc store;
  75     source_pict_class_t srcClass, maskClass;
  76     pixman_bool_t component_alpha;
  77     uint32_t *bits;
  78     int32_t stride;
  79     int i;
  80
  81     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
  82     {
  83         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
  84
  85         if (!scanline_buffer)
  86             return;
  87     }
  88
  89     src_buffer = scanline_buffer;
  90     mask_buffer = src_buffer + width * Bpp;
  91     dest_buffer = mask_buffer + width * Bpp;
  92
  93     srcClass = _pixman_image_classify (src,
  94                                        src_x, src_y,
  95                                        width, height);
  96
  97     maskClass = SOURCE_IMAGE_CLASS_UNKNOWN;
  98     if (mask)
  99     {
 100         maskClass = _pixman_image_classify (mask,
 101                                             src_x, src_y,
 102                                             width, height);
 103     }
 104
 105     if (op == PIXMAN_OP_CLEAR)
 106         fetchSrc = NULL;
 107     else if (wide)
 108         fetchSrc = _pixman_image_get_scanline_64;
 109     else
 110         fetchSrc = _pixman_image_get_scanline_32;
 111
 112     if (!mask || op == PIXMAN_OP_CLEAR)
 113         fetchMask = NULL;
 114     else if (wide)
 115         fetchMask = _pixman_image_get_scanline_64;
 116     else
 117         fetchMask = _pixman_image_get_scanline_32;
 118
 119     if (op == PIXMAN_OP_CLEAR || op == PIXMAN_OP_SRC)
 120         fetchDest = NULL;
 121     else if (wide)
 122         fetchDest = _pixman_image_get_scanline_64;
 123     else
 124         fetchDest = _pixman_image_get_scanline_32;
 125
 126     if (wide)
 127         store = _pixman_image_store_scanline_64;
 128     else
 129         store = _pixman_image_store_scanline_32;
 130
 131     /* Skip the store step and composite directly into the
 132      * destination if the output format of the compose func matches
 133      * the destination format.
 134      */
 135     if (!wide &&
 136         !dest->common.alpha_map &&
 137         !dest->common.write_func &&
 138         (op == PIXMAN_OP_ADD || op == PIXMAN_OP_OVER) &&
 139         (dest->bits.format == PIXMAN_a8r8g8b8 ||
 140          dest->bits.format == PIXMAN_x8r8g8b8))
 141     {
 142         store = NULL;
 143     }
 144
 145     if (!store)
 146     {
 147         bits = dest->bits.bits;
 148         stride = dest->bits.rowstride;
 149     }
 150     else
 151     {
 152         bits = NULL;
 153         stride = 0;
 154     }
 155
 156     component_alpha =
 157         fetchSrc                        &&
 158         fetchMask                       &&
 159         mask                            &&
 160         mask->common.type == BITS       &&
 161         mask->common.component_alpha    &&
 162         PIXMAN_FORMAT_RGB (mask->bits.format);
 163
 164     if (wide)
 165     {
 166         if (component_alpha)
 167             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 168         else
 169             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 170     }
 171     else
 172     {
 173         if (component_alpha)
 174             compose = _pixman_implementation_combine_32_ca;
 175         else
 176             compose = _pixman_implementation_combine_32;
 177     }
 178
 179     if (!compose)
 180         return;
 181
 182     if (!fetchMask)
 183         mask_buffer = NULL;
 184
 185     for (i = 0; i < height; ++i)
 186     {
 187         /* fill first half of scanline with source */
 188         if (fetchSrc)
 189         {
 190             if (fetchMask)
 191             {
 192                 /* fetch mask before source so that fetching of
 193                    source can be optimized */
 194                 fetchMask (mask, mask_x, mask_y + i,
 195                            width, (void *)mask_buffer, 0, 0);
 196
 197                 if (maskClass == SOURCE_IMAGE_CLASS_HORIZONTAL)
 198                     fetchMask = NULL;
 199             }
 200
 201             if (srcClass == SOURCE_IMAGE_CLASS_HORIZONTAL)
 202             {
 203                 fetchSrc (src, src_x, src_y + i,
 204                           width, (void *)src_buffer, 0, 0);
 205                 fetchSrc = NULL;
 206             }
 207             else
 208             {
 209                 fetchSrc (src, src_x, src_y + i,
 210                           width, (void *)src_buffer, (void *)mask_buffer,
 211                           0xffffffff);
 212             }
 213         }
 214         else if (fetchMask)
 215         {
 216             fetchMask (mask, mask_x, mask_y + i,
 217                        width, (void *)mask_buffer, 0, 0);
 218         }
 219
 220         if (store)
 221         {
 222             /* fill dest into second half of scanline */
 223             if (fetchDest)
 224                 fetchDest (dest, dest_x, dest_y + i,
 225                            width, (void *)dest_buffer, 0, 0);
 226
 227             /* blend */
 228             compose (imp->toplevel, op, (void *)dest_buffer, (void *)src_buffer, (void *)mask_buffer, width);
 229
 230             /* write back */
 231             store (&(dest->bits), dest_x, dest_y + i, width,
 232                    (void *)dest_buffer);
 233         }
 234         else
 235         {
 236             /* blend */
 237             compose (imp->toplevel, op, bits + (dest_y + i) * stride +
 238                      dest_x,
 239                      (void *)src_buffer, (void *)mask_buffer, width);
 240         }
 241     }
 242
 243     if (scanline_buffer != stack_scanline_buffer)
 244         free (scanline_buffer);
 245 }
 246
 247 static void
 248 general_composite (pixman_implementation_t *    imp,
 249                    pixman_op_t                  op,
 250                    pixman_image_t *             src,
 251                    pixman_image_t *             mask,
 252                    pixman_image_t *             dest,
 253                    int32_t                      src_x,
 254                    int32_t                      src_y,
 255                    int32_t                      mask_x,
 256                    int32_t                      mask_y,
 257                    int32_t                      dest_x,
 258                    int32_t                      dest_y,
 259                    int32_t                      width,
 260                    int32_t                      height)
 261 {
 262     _pixman_walk_composite_region (imp, op, src, mask, dest, src_x, src_y,
 263                                    mask_x, mask_y, dest_x, dest_y, width, height,
 264                                    FALSE, FALSE, general_composite_rect);
 265 }
 266
 267 static pixman_bool_t
 268 general_blt (pixman_implementation_t *imp,
 269              uint32_t *src_bits,
 270              uint32_t *dst_bits,
 271              int src_stride,
 272              int dst_stride,
 273              int src_bpp,
 274              int dst_bpp,
 275              int src_x, int src_y,
 276              int dst_x, int dst_y,
 277              int width, int height)
 278 {
 279     /* We can't blit unless we have sse2 or mmx */
 280
 281     return FALSE;
 282 }
 283
 284 static pixman_bool_t
 285 general_fill (pixman_implementation_t *imp,
 286               uint32_t *bits,
 287               int stride,
 288               int bpp,
 289               int x,
 290               int y,
 291               int width,
 292               int height,
 293               uint32_t xor)
 294 {
 295     return FALSE;
 296 }
 297
 298 pixman_implementation_t *
 299 _pixman_implementation_create_general (void)
 300 {
 301     pixman_implementation_t *imp = _pixman_implementation_create (NULL);
 302
 303     _pixman_setup_combiner_functions_32 (imp);
 304     _pixman_setup_combiner_functions_64 (imp);
 305
 306     imp->composite = general_composite;
 307     imp->blt = general_blt;
 308     imp->fill = general_fill;
 309
 310     return imp;
 311 }