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 static uint32_t *
  43 src_get_scanline_null (pixman_iter_t *iter, const uint32_t *mask)
  44 {
  45     return NULL;
  46 }
  47
  48 static void
  49 src_iter_init (pixman_implementation_t *imp,
  50                pixman_iter_t *iter,
  51                pixman_image_t *image,
  52                int x, int y, int width, int height,
  53                uint8_t *buffer, iter_flags_t flags)
  54 {
  55     iter->image = image;
  56     iter->x = x;
  57     iter->y = y;
  58     iter->width = width;
  59     iter->buffer = (uint32_t *)buffer;
  60
  61     if (!image)
  62     {
  63         iter->get_scanline = src_get_scanline_null;
  64     }
  65     else if (image->type == SOLID)
  66     {
  67         _pixman_solid_fill_iter_init (
  68             image, iter, x, y, width, height, buffer, flags);
  69     }
  70     else if (image->type == LINEAR)
  71     {
  72         _pixman_linear_gradient_iter_init (
  73             image, iter, x, y, width, height, buffer, flags);
  74     }
  75     else if (image->type == RADIAL)
  76     {
  77         _pixman_radial_gradient_iter_init (
  78             image, iter, x, y, width, height, buffer, flags);
  79     }
  80     else if (image->type == CONICAL)
  81     {
  82         _pixman_conical_gradient_iter_init (
  83             image, iter, x, y, width, height, buffer, flags);
  84     }
  85     else if (image->type == BITS)
  86     {
  87         _pixman_bits_image_src_iter_init (
  88             image, iter, x, y, width, height, buffer, flags);
  89     }
  90     else
  91     {
  92         _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
  93     }
  94 }
  95
  96 static void
  97 dest_iter_init (pixman_implementation_t *imp,
  98                 pixman_iter_t *iter,
  99                 pixman_image_t *image,
 100                 int x, int y, int width, int height,
 101                 uint8_t *buffer, iter_flags_t flags)
 102 {
 103     iter->image = image;
 104     iter->x = x;
 105     iter->y = y;
 106     iter->width = width;
 107     iter->buffer = (uint32_t *)buffer;
 108
 109     if (image->type == BITS)
 110     {
 111         _pixman_bits_image_dest_iter_init (
 112             image, iter, x, y, width, height, buffer, flags);
 113     }
 114     else
 115     {
 116         _pixman_log_error (FUNC, "Trying to write to a non-writable image");
 117     }
 118 }
 119
 120 #define SCANLINE_BUFFER_LENGTH 8192
 121
 122 static void
 123 general_composite_rect  (pixman_implementation_t *imp,
 124                          pixman_op_t              op,
 125                          pixman_image_t *         src,
 126                          pixman_image_t *         mask,
 127                          pixman_image_t *         dest,
 128                          int32_t                  src_x,
 129                          int32_t                  src_y,
 130                          int32_t                  mask_x,
 131                          int32_t                  mask_y,
 132                          int32_t                  dest_x,
 133                          int32_t                  dest_y,
 134                          int32_t                  width,
 135                          int32_t                  height)
 136 {
 137     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
 138     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
 139     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
 140     pixman_iter_t src_iter, mask_iter, dest_iter;
 141     pixman_combine_32_func_t compose;
 142     pixman_bool_t component_alpha;
 143     iter_flags_t narrow;
 144     int Bpp;
 145     int i;
 146
 147     if ((src->common.flags & FAST_PATH_NARROW_FORMAT)           &&
 148         (!mask || mask->common.flags & FAST_PATH_NARROW_FORMAT) &&
 149         (dest->common.flags & FAST_PATH_NARROW_FORMAT))
 150     {
 151         narrow = ITER_NARROW;
 152         Bpp = 4;
 153     }
 154     else
 155     {
 156         narrow = 0;
 157         Bpp = 8;
 158     }
 159
 160     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
 161     {
 162         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
 163
 164         if (!scanline_buffer)
 165             return;
 166     }
 167
 168     src_buffer = scanline_buffer;
 169     mask_buffer = src_buffer + width * Bpp;
 170     dest_buffer = mask_buffer + width * Bpp;
 171
 172     src_iter_init (imp->toplevel, &src_iter, src,
 173                    src_x, src_y, width, height,
 174                    src_buffer, narrow);
 175
 176     src_iter_init (imp->toplevel, &mask_iter, mask,
 177                    mask_x, mask_y, width, height,
 178                    mask_buffer, narrow);
 179
 180     dest_iter_init (imp->toplevel, &dest_iter, dest,
 181                     dest_x, dest_y, width, height,
 182                     dest_buffer, narrow);
 183
 184     component_alpha =
 185         mask                            &&
 186         mask->common.type == BITS       &&
 187         mask->common.component_alpha    &&
 188         PIXMAN_FORMAT_RGB (mask->bits.format);
 189
 190     if (narrow)
 191     {
 192         if (component_alpha)
 193             compose = _pixman_implementation_combine_32_ca;
 194         else
 195             compose = _pixman_implementation_combine_32;
 196     }
 197     else
 198     {
 199         if (component_alpha)
 200             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 201         else
 202             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 203     }
 204
 205     if (!compose)
 206         return;
 207
 208     for (i = 0; i < height; ++i)
 209     {
 210         uint32_t *s, *m, *d;
 211
 212         m = mask_iter.get_scanline (&mask_iter, NULL);
 213         s = src_iter.get_scanline (&src_iter, m);
 214         d = dest_iter.get_scanline (&dest_iter, NULL);
 215
 216         compose (imp->toplevel, op, d, s, m, width);
 217
 218         dest_iter.write_back (&dest_iter);
 219     }
 220
 221     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
 222         free (scanline_buffer);
 223 }
 224
 225 static const pixman_fast_path_t general_fast_path[] =
 226 {
 227     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
 228     { PIXMAN_OP_NONE }
 229 };
 230
 231 static pixman_bool_t
 232 general_blt (pixman_implementation_t *imp,
 233              uint32_t *               src_bits,
 234              uint32_t *               dst_bits,
 235              int                      src_stride,
 236              int                      dst_stride,
 237              int                      src_bpp,
 238              int                      dst_bpp,
 239              int                      src_x,
 240              int                      src_y,
 241              int                      dst_x,
 242              int                      dst_y,
 243              int                      width,
 244              int                      height)
 245 {
 246     /* We can't blit unless we have sse2 or mmx */
 247
 248     return FALSE;
 249 }
 250
 251 static pixman_bool_t
 252 general_fill (pixman_implementation_t *imp,
 253               uint32_t *               bits,
 254               int                      stride,
 255               int                      bpp,
 256               int                      x,
 257               int                      y,
 258               int                      width,
 259               int                      height,
 260               uint32_t xor)
 261 {
 262     return FALSE;
 263 }
 264
 265 pixman_implementation_t *
 266 _pixman_implementation_create_general (void)
 267 {
 268     pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
 269
 270     _pixman_setup_combiner_functions_32 (imp);
 271     _pixman_setup_combiner_functions_64 (imp);
 272
 273     imp->blt = general_blt;
 274     imp->fill = general_fill;
 275
 276     return imp;
 277 }
 278