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
  40 static void
  41 general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
  42 {
  43     pixman_image_t *image = iter->image;
  44
  45     if (image->type == SOLID)
  46         _pixman_solid_fill_iter_init (image, iter);
  47     else if (image->type == LINEAR)
  48         _pixman_linear_gradient_iter_init (image, iter);
  49     else if (image->type == RADIAL)
  50         _pixman_radial_gradient_iter_init (image, iter);
  51     else if (image->type == CONICAL)
  52         _pixman_conical_gradient_iter_init (image, iter);
  53     else if (image->type == BITS)
  54         _pixman_bits_image_src_iter_init (image, iter);
  55     else
  56         _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
  57 }
  58
  59 static void
  60 general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
  61 {
  62     if (iter->image->type == BITS)
  63     {
  64         _pixman_bits_image_dest_iter_init (iter->image, iter);
  65     }
  66     else
  67     {
  68         _pixman_log_error (FUNC, "Trying to write to a non-writable image");
  69     }
  70 }
  71
  72 typedef struct op_info_t op_info_t;
  73 struct op_info_t
  74 {
  75     uint8_t src, dst;
  76 };
  77
  78 #define ITER_IGNORE_BOTH                                                \
  79     (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
  80
  81 static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
  82 {
  83     /* Src                   Dst                   */
  84     { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */
  85     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */
  86     { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */
  87     { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */
  88     { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */
  89     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */
  90     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */
  91     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */
  92     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */
  93     { 0,                     0                     }, /* ATOP */
  94     { 0,                     0                     }, /* ATOP_REVERSE */
  95     { 0,                     0                     }, /* XOR */
  96     { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */
  97     { 0,                     0                     }, /* SATURATE */
  98 };
  99
 100 #define SCANLINE_BUFFER_LENGTH 8192
 101
 102 static void
 103 general_composite_rect  (pixman_implementation_t *imp,
 104                          pixman_composite_info_t *info)
 105 {
 106     PIXMAN_COMPOSITE_ARGS (info);
 107     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
 108     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
 109     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
 110     pixman_iter_t src_iter, mask_iter, dest_iter;
 111     pixman_combine_32_func_t compose;
 112     pixman_bool_t component_alpha;
 113     iter_flags_t narrow, src_flags;
 114     int Bpp;
 115     int i;
 116
 117     if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT)                 &&
 118         (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
 119         (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
 120     {
 121         narrow = ITER_NARROW;
 122         Bpp = 4;
 123     }
 124     else
 125     {
 126         narrow = 0;
 127         Bpp = 8;
 128     }
 129
 130     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
 131     {
 132         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
 133
 134         if (!scanline_buffer)
 135             return;
 136     }
 137
 138     src_buffer = scanline_buffer;
 139     mask_buffer = src_buffer + width * Bpp;
 140     dest_buffer = mask_buffer + width * Bpp;
 141
 142     /* src iter */
 143     src_flags = narrow | op_flags[op].src;
 144
 145     _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
 146                                           src_x, src_y, width, height,
 147                                           src_buffer, src_flags);
 148
 149     /* mask iter */
 150     if ((src_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
 151         (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
 152     {
 153         /* If it doesn't matter what the source is, then it doesn't matter
 154          * what the mask is
 155          */
 156         mask_image = NULL;
 157     }
 158
 159     component_alpha =
 160         mask_image                            &&
 161         mask_image->common.type == BITS       &&
 162         mask_image->common.component_alpha    &&
 163         PIXMAN_FORMAT_RGB (mask_image->bits.format);
 164
 165     _pixman_implementation_src_iter_init (
 166         imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
 167         mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB));
 168
 169     /* dest iter */
 170     _pixman_implementation_dest_iter_init (
 171         imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
 172         dest_buffer, narrow | op_flags[op].dst);
 173
 174     compose = _pixman_implementation_lookup_combiner (
 175         imp->toplevel, op, component_alpha, narrow);
 176
 177     if (!compose)
 178         return;
 179
 180     for (i = 0; i < height; ++i)
 181     {
 182         uint32_t *s, *m, *d;
 183
 184         m = mask_iter.get_scanline (&mask_iter, NULL);
 185         s = src_iter.get_scanline (&src_iter, m);
 186         d = dest_iter.get_scanline (&dest_iter, NULL);
 187
 188         compose (imp->toplevel, op, d, s, m, width);
 189
 190         dest_iter.write_back (&dest_iter);
 191     }
 192
 193     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
 194         free (scanline_buffer);
 195 }
 196
 197 static const pixman_fast_path_t general_fast_path[] =
 198 {
 199     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
 200     { PIXMAN_OP_NONE }
 201 };
 202
 203 static pixman_bool_t
 204 general_blt (pixman_implementation_t *imp,
 205              uint32_t *               src_bits,
 206              uint32_t *               dst_bits,
 207              int                      src_stride,
 208              int                      dst_stride,
 209              int                      src_bpp,
 210              int                      dst_bpp,
 211              int                      src_x,
 212              int                      src_y,
 213              int                      dest_x,
 214              int                      dest_y,
 215              int                      width,
 216              int                      height)
 217 {
 218     /* We can't blit unless we have sse2 or mmx */
 219
 220     return FALSE;
 221 }
 222
 223 static pixman_bool_t
 224 general_fill (pixman_implementation_t *imp,
 225               uint32_t *               bits,
 226               int                      stride,
 227               int                      bpp,
 228               int                      x,
 229               int                      y,
 230               int                      width,
 231               int                      height,
 232               uint32_t xor)
 233 {
 234     return FALSE;
 235 }
 236
 237 pixman_implementation_t *
 238 _pixman_implementation_create_general (void)
 239 {
 240     pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
 241
 242     _pixman_setup_combiner_functions_32 (imp);
 243     _pixman_setup_combiner_functions_64 (imp);
 244
 245     imp->blt = general_blt;
 246     imp->fill = general_fill;
 247     imp->src_iter_init = general_src_iter_init;
 248     imp->dest_iter_init = general_dest_iter_init;
 249
 250     return imp;
 251 }
 252