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_op_t              op,
 105                          pixman_image_t *         src_image,
 106                          pixman_image_t *         mask_image,
 107                          pixman_image_t *         dest_image,
 108                          int32_t                  src_x,
 109                          int32_t                  src_y,
 110                          int32_t                  mask_x,
 111                          int32_t                  mask_y,
 112                          int32_t                  dest_x,
 113                          int32_t                  dest_y,
 114                          int32_t                  width,
 115                          int32_t                  height)
 116 {
 117     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
 118     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
 119     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
 120     pixman_iter_t src_iter, mask_iter, dest_iter;
 121     pixman_combine_32_func_t compose;
 122     pixman_bool_t component_alpha;
 123     iter_flags_t narrow, src_flags;
 124     int Bpp;
 125     int i;
 126
 127     if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT)                 &&
 128         (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
 129         (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
 130     {
 131         narrow = ITER_NARROW;
 132         Bpp = 4;
 133     }
 134     else
 135     {
 136         narrow = 0;
 137         Bpp = 8;
 138     }
 139
 140     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
 141     {
 142         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
 143
 144         if (!scanline_buffer)
 145             return;
 146     }
 147
 148     src_buffer = scanline_buffer;
 149     mask_buffer = src_buffer + width * Bpp;
 150     dest_buffer = mask_buffer + width * Bpp;
 151
 152     /* src iter */
 153     src_flags = narrow | op_flags[op].src;
 154
 155     _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
 156                                           src_x, src_y, width, height,
 157                                           src_buffer, src_flags);
 158
 159     /* mask iter */
 160     if ((src_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
 161         (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
 162     {
 163         /* If it doesn't matter what the source is, then it doesn't matter
 164          * what the mask is
 165          */
 166         mask_image = NULL;
 167     }
 168
 169     component_alpha =
 170         mask_image                            &&
 171         mask_image->common.type == BITS       &&
 172         mask_image->common.component_alpha    &&
 173         PIXMAN_FORMAT_RGB (mask_image->bits.format);
 174
 175     _pixman_implementation_src_iter_init (
 176         imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
 177         mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB));
 178
 179     /* dest iter */
 180     _pixman_implementation_dest_iter_init (
 181         imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
 182         dest_buffer, narrow | op_flags[op].dst);
 183
 184     if (narrow)
 185     {
 186         if (component_alpha)
 187             compose = _pixman_implementation_combine_32_ca;
 188         else
 189             compose = _pixman_implementation_combine_32;
 190     }
 191     else
 192     {
 193         if (component_alpha)
 194             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 195         else
 196             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 197     }
 198
 199     if (!compose)
 200         return;
 201
 202     for (i = 0; i < height; ++i)
 203     {
 204         uint32_t *s, *m, *d;
 205
 206         m = mask_iter.get_scanline (&mask_iter, NULL);
 207         s = src_iter.get_scanline (&src_iter, m);
 208         d = dest_iter.get_scanline (&dest_iter, NULL);
 209
 210         compose (imp->toplevel, op, d, s, m, width);
 211
 212         dest_iter.write_back (&dest_iter);
 213     }
 214
 215     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
 216         free (scanline_buffer);
 217 }
 218
 219 static const pixman_fast_path_t general_fast_path[] =
 220 {
 221     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
 222     { PIXMAN_OP_NONE }
 223 };
 224
 225 static pixman_bool_t
 226 general_blt (pixman_implementation_t *imp,
 227              uint32_t *               src_bits,
 228              uint32_t *               dst_bits,
 229              int                      src_stride,
 230              int                      dst_stride,
 231              int                      src_bpp,
 232              int                      dst_bpp,
 233              int                      src_x,
 234              int                      src_y,
 235              int                      dest_x,
 236              int                      dest_y,
 237              int                      width,
 238              int                      height)
 239 {
 240     /* We can't blit unless we have sse2 or mmx */
 241
 242     return FALSE;
 243 }
 244
 245 static pixman_bool_t
 246 general_fill (pixman_implementation_t *imp,
 247               uint32_t *               bits,
 248               int                      stride,
 249               int                      bpp,
 250               int                      x,
 251               int                      y,
 252               int                      width,
 253               int                      height,
 254               uint32_t xor)
 255 {
 256     return FALSE;
 257 }
 258
 259 pixman_implementation_t *
 260 _pixman_implementation_create_general (void)
 261 {
 262     pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
 263
 264     _pixman_setup_combiner_functions_32 (imp);
 265     _pixman_setup_combiner_functions_64 (imp);
 266
 267     imp->blt = general_blt;
 268     imp->fill = general_fill;
 269     imp->src_iter_init = general_src_iter_init;
 270     imp->dest_iter_init = general_dest_iter_init;
 271
 272     return imp;
 273 }
 274