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 #ifdef HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <math.h>
  34 #include <limits.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include "pixman-private.h"
  39 #include "pixman-combine32.h"
  40 #include "pixman-private.h"
  41
  42 #define SCANLINE_BUFFER_LENGTH 8192
  43
  44 static void
  45 general_composite_rect  (pixman_implementation_t *imp,
  46                          pixman_op_t              op,
  47                          pixman_image_t *         src,
  48                          pixman_image_t *         mask,
  49                          pixman_image_t *         dest,
  50                          int32_t                  src_x,
  51                          int32_t                  src_y,
  52                          int32_t                  mask_x,
  53                          int32_t                  mask_y,
  54                          int32_t                  dest_x,
  55                          int32_t                  dest_y,
  56                          int32_t                  width,
  57                          int32_t                  height)
  58 {
  59     uint8_t stack_scanline_buffer[SCANLINE_BUFFER_LENGTH * 3];
  60     const pixman_format_code_t src_format =
  61         src->type == BITS ? src->bits.format : 0;
  62     const pixman_format_code_t mask_format =
  63         mask && mask->type == BITS ? mask->bits.format : 0;
  64     const pixman_format_code_t dest_format =
  65         dest->type == BITS ? dest->bits.format : 0;
  66     const int src_wide = PIXMAN_FORMAT_IS_WIDE (src_format);
  67     const int mask_wide = mask && PIXMAN_FORMAT_IS_WIDE (mask_format);
  68     const int dest_wide = PIXMAN_FORMAT_IS_WIDE (dest_format);
  69     const int wide = src_wide || mask_wide || dest_wide;
  70     const int Bpp = wide ? 8 : 4;
  71     uint8_t *scanline_buffer = stack_scanline_buffer;
  72     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
  73     fetch_scanline_t fetch_src = NULL, fetch_mask = NULL, fetch_dest = NULL;
  74     pixman_combine_32_func_t compose;
  75     store_scanline_t store;
  76     source_image_class_t src_class, mask_class;
  77     pixman_bool_t component_alpha;
  78     uint32_t *bits;
  79     int32_t stride;
  80     int i;
  81
  82     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
  83     {
  84         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
  85
  86         if (!scanline_buffer)
  87             return;
  88     }
  89
  90     src_buffer = scanline_buffer;
  91     mask_buffer = src_buffer + width * Bpp;
  92     dest_buffer = mask_buffer + width * Bpp;
  93
  94     src_class = _pixman_image_classify (src,
  95                                         src_x, src_y,
  96                                         width, height);
  97
  98     mask_class = SOURCE_IMAGE_CLASS_UNKNOWN;
  99
 100     if (mask)
 101     {
 102         mask_class = _pixman_image_classify (mask,
 103                                              src_x, src_y,
 104                                              width, height);
 105     }
 106
 107     if (op == PIXMAN_OP_CLEAR)
 108         fetch_src = NULL;
 109     else if (wide)
 110         fetch_src = _pixman_image_get_scanline_64;
 111     else
 112         fetch_src = _pixman_image_get_scanline_32;
 113
 114     if (!mask || op == PIXMAN_OP_CLEAR)
 115         fetch_mask = NULL;
 116     else if (wide)
 117         fetch_mask = _pixman_image_get_scanline_64;
 118     else
 119         fetch_mask = _pixman_image_get_scanline_32;
 120
 121     if (op == PIXMAN_OP_CLEAR || op == PIXMAN_OP_SRC)
 122         fetch_dest = NULL;
 123     else if (wide)
 124         fetch_dest = _pixman_image_get_scanline_64;
 125     else
 126         fetch_dest = _pixman_image_get_scanline_32;
 127
 128     if (wide)
 129         store = _pixman_image_store_scanline_64;
 130     else
 131         store = _pixman_image_store_scanline_32;
 132
 133     /* Skip the store step and composite directly into the
 134      * destination if the output format of the compose func matches
 135      * the destination format.
 136      */
 137     if (!wide &&
 138         !dest->common.alpha_map &&
 139         !dest->bits.write_func &&
 140         (op == PIXMAN_OP_ADD || op == PIXMAN_OP_OVER) &&
 141         (dest->bits.format == PIXMAN_a8r8g8b8 ||
 142          dest->bits.format == PIXMAN_x8r8g8b8))
 143     {
 144         store = NULL;
 145     }
 146
 147     if (!store)
 148     {
 149         bits = dest->bits.bits;
 150         stride = dest->bits.rowstride;
 151     }
 152     else
 153     {
 154         bits = NULL;
 155         stride = 0;
 156     }
 157
 158     component_alpha =
 159         fetch_src                       &&
 160         fetch_mask                      &&
 161         mask                            &&
 162         mask->common.type == BITS       &&
 163         mask->common.component_alpha    &&
 164         PIXMAN_FORMAT_RGB (mask->bits.format);
 165
 166     if (wide)
 167     {
 168         if (component_alpha)
 169             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 170         else
 171             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 172     }
 173     else
 174     {
 175         if (component_alpha)
 176             compose = _pixman_implementation_combine_32_ca;
 177         else
 178             compose = _pixman_implementation_combine_32;
 179     }
 180
 181     if (!compose)
 182         return;
 183
 184     if (!fetch_mask)
 185         mask_buffer = NULL;
 186
 187     for (i = 0; i < height; ++i)
 188     {
 189         /* fill first half of scanline with source */
 190         if (fetch_src)
 191         {
 192             if (fetch_mask)
 193             {
 194                 /* fetch mask before source so that fetching of
 195                    source can be optimized */
 196                 fetch_mask (mask, mask_x, mask_y + i,
 197                             width, (void *)mask_buffer, 0, 0);
 198
 199                 if (mask_class == SOURCE_IMAGE_CLASS_HORIZONTAL)
 200                     fetch_mask = NULL;
 201             }
 202
 203             if (src_class == SOURCE_IMAGE_CLASS_HORIZONTAL)
 204             {
 205                 fetch_src (src, src_x, src_y + i,
 206                            width, (void *)src_buffer, 0, 0);
 207                 fetch_src = NULL;
 208             }
 209             else
 210             {
 211                 fetch_src (src, src_x, src_y + i,
 212                            width, (void *)src_buffer, (void *)mask_buffer,
 213                            0xffffffff);
 214             }
 215         }
 216         else if (fetch_mask)
 217         {
 218             fetch_mask (mask, mask_x, mask_y + i,
 219                         width, (void *)mask_buffer, 0, 0);
 220         }
 221
 222         if (store)
 223         {
 224             /* fill dest into second half of scanline */
 225             if (fetch_dest)
 226             {
 227                 fetch_dest (dest, dest_x, dest_y + i,
 228                             width, (void *)dest_buffer, 0, 0);
 229             }
 230
 231             /* blend */
 232             compose (imp->toplevel, op,
 233                      (void *)dest_buffer,
 234                      (void *)src_buffer,
 235                      (void *)mask_buffer,
 236                      width);
 237
 238             /* write back */
 239             store (&(dest->bits), dest_x, dest_y + i, width,
 240                    (void *)dest_buffer);
 241         }
 242         else
 243         {
 244             /* blend */
 245             compose (imp->toplevel, op,
 246                      bits + (dest_y + i) * stride + dest_x,
 247                      (void *)src_buffer, (void *)mask_buffer, width);
 248         }
 249     }
 250
 251     if (scanline_buffer != stack_scanline_buffer)
 252         free (scanline_buffer);
 253 }
 254
 255 static void
 256 general_composite (pixman_implementation_t * imp,
 257                    pixman_op_t               op,
 258                    pixman_image_t *          src,
 259                    pixman_image_t *          mask,
 260                    pixman_image_t *          dest,
 261                    int32_t                   src_x,
 262                    int32_t                   src_y,
 263                    int32_t                   mask_x,
 264                    int32_t                   mask_y,
 265                    int32_t                   dest_x,
 266                    int32_t                   dest_y,
 267                    int32_t                   width,
 268                    int32_t                   height)
 269 {
 270     _pixman_walk_composite_region (imp, op, src, mask, dest, src_x, src_y,
 271                                    mask_x, mask_y, dest_x, dest_y,
 272                                    width, height,
 273                                    general_composite_rect);
 274 }
 275
 276 static pixman_bool_t
 277 general_blt (pixman_implementation_t *imp,
 278              uint32_t *               src_bits,
 279              uint32_t *               dst_bits,
 280              int                      src_stride,
 281              int                      dst_stride,
 282              int                      src_bpp,
 283              int                      dst_bpp,
 284              int                      src_x,
 285              int                      src_y,
 286              int                      dst_x,
 287              int                      dst_y,
 288              int                      width,
 289              int                      height)
 290 {
 291     /* We can't blit unless we have sse2 or mmx */
 292
 293     return FALSE;
 294 }
 295
 296 static pixman_bool_t
 297 general_fill (pixman_implementation_t *imp,
 298               uint32_t *               bits,
 299               int                      stride,
 300               int                      bpp,
 301               int                      x,
 302               int                      y,
 303               int                      width,
 304               int                      height,
 305               uint32_t xor)
 306 {
 307     return FALSE;
 308 }
 309
 310 pixman_implementation_t *
 311 _pixman_implementation_create_general (void)
 312 {
 313     pixman_implementation_t *imp = _pixman_implementation_create (NULL);
 314
 315     _pixman_setup_combiner_functions_32 (imp);
 316     _pixman_setup_combiner_functions_64 (imp);
 317
 318     imp->composite = general_composite;
 319     imp->blt = general_blt;
 320     imp->fill = general_fill;
 321
 322     return imp;
 323 }
 324