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 void
  43 general_src_iter_init (pixman_implementation_t *imp,
  44                        pixman_iter_t *iter,
  45                        pixman_image_t *image,
  46                        int x, int y, int width, int height,
  47                        uint8_t *buffer, iter_flags_t flags)
  48 {
  49     iter->image = image;
  50     iter->x = x;
  51     iter->y = y;
  52     iter->width = width;
  53     iter->buffer = (uint32_t *)buffer;
  54
  55     if (image->type == SOLID)
  56     {
  57         _pixman_solid_fill_iter_init (
  58             image, iter, x, y, width, height, buffer, flags);
  59     }
  60     else if (image->type == LINEAR)
  61     {
  62         _pixman_linear_gradient_iter_init (
  63             image, iter, x, y, width, height, buffer, flags);
  64     }
  65     else if (image->type == RADIAL)
  66     {
  67         _pixman_radial_gradient_iter_init (
  68             image, iter, x, y, width, height, buffer, flags);
  69     }
  70     else if (image->type == CONICAL)
  71     {
  72         _pixman_conical_gradient_iter_init (
  73             image, iter, x, y, width, height, buffer, flags);
  74     }
  75     else if (image->type == BITS)
  76     {
  77         _pixman_bits_image_src_iter_init (
  78             image, iter, x, y, width, height, buffer, flags);
  79     }
  80     else
  81     {
  82         _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
  83     }
  84 }
  85
  86 static void
  87 general_dest_iter_init (pixman_implementation_t *imp,
  88                         pixman_iter_t *iter,
  89                         pixman_image_t *image,
  90                         int x, int y, int width, int height,
  91                         uint8_t *buffer, iter_flags_t flags)
  92 {
  93     iter->image = image;
  94     iter->x = x;
  95     iter->y = y;
  96     iter->width = width;
  97     iter->buffer = (uint32_t *)buffer;
  98
  99     if (image->type == BITS)
 100     {
 101         _pixman_bits_image_dest_iter_init (
 102             image, iter, x, y, width, height, buffer, flags);
 103     }
 104     else
 105     {
 106         _pixman_log_error (FUNC, "Trying to write to a non-writable image");
 107     }
 108 }
 109
 110 typedef struct op_info_t op_info_t;
 111 struct op_info_t
 112 {
 113     uint8_t src, dst;
 114 };
 115
 116 #define ITER_IGNORE_BOTH                                                \
 117     (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
 118
 119 static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
 120 {
 121     /* Src                   Dst                   */
 122     { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */
 123     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */
 124     { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */
 125     { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */
 126     { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */
 127     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */
 128     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */
 129     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */
 130     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */
 131     { 0,                     0                     }, /* ATOP */
 132     { 0,                     0                     }, /* ATOP_REVERSE */
 133     { 0,                     0                     }, /* XOR */
 134     { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */
 135     { 0,                     0                     }, /* SATURATE */
 136 };
 137
 138 #define SCANLINE_BUFFER_LENGTH 8192
 139
 140 static void
 141 general_composite_rect  (pixman_implementation_t *imp,
 142                          pixman_op_t              op,
 143                          pixman_image_t *         src,
 144                          pixman_image_t *         mask,
 145                          pixman_image_t *         dest,
 146                          int32_t                  src_x,
 147                          int32_t                  src_y,
 148                          int32_t                  mask_x,
 149                          int32_t                  mask_y,
 150                          int32_t                  dest_x,
 151                          int32_t                  dest_y,
 152                          int32_t                  width,
 153                          int32_t                  height)
 154 {
 155     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
 156     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
 157     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
 158     pixman_iter_t src_iter, mask_iter, dest_iter;
 159     pixman_combine_32_func_t compose;
 160     pixman_bool_t component_alpha;
 161     iter_flags_t narrow, src_flags;
 162     int Bpp;
 163     int i;
 164
 165     if ((src->common.flags & FAST_PATH_NARROW_FORMAT)           &&
 166         (!mask || mask->common.flags & FAST_PATH_NARROW_FORMAT) &&
 167         (dest->common.flags & FAST_PATH_NARROW_FORMAT))
 168     {
 169         narrow = ITER_NARROW;
 170         Bpp = 4;
 171     }
 172     else
 173     {
 174         narrow = 0;
 175         Bpp = 8;
 176     }
 177
 178     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
 179     {
 180         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
 181
 182         if (!scanline_buffer)
 183             return;
 184     }
 185
 186     src_buffer = scanline_buffer;
 187     mask_buffer = src_buffer + width * Bpp;
 188     dest_buffer = mask_buffer + width * Bpp;
 189
 190     /* src iter */
 191     src_flags = narrow | op_flags[op].src;
 192
 193     _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src,
 194                                           src_x, src_y, width, height,
 195                                           src_buffer, src_flags);
 196
 197     /* mask iter */
 198     if ((src_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
 199         (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
 200     {
 201         /* If it doesn't matter what the source is, then it doesn't matter
 202          * what the mask is
 203          */
 204         mask = NULL;
 205     }
 206
 207     component_alpha =
 208         mask                            &&
 209         mask->common.type == BITS       &&
 210         mask->common.component_alpha    &&
 211         PIXMAN_FORMAT_RGB (mask->bits.format);
 212
 213     _pixman_implementation_src_iter_init (
 214         imp->toplevel, &mask_iter, mask, mask_x, mask_y, width, height,
 215         mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB));
 216
 217     /* dest iter */
 218     _pixman_implementation_dest_iter_init (imp->toplevel, &dest_iter, dest,
 219                                            dest_x, dest_y, width, height,
 220                                            dest_buffer,
 221                                            narrow | op_flags[op].dst);
 222
 223     if (narrow)
 224     {
 225         if (component_alpha)
 226             compose = _pixman_implementation_combine_32_ca;
 227         else
 228             compose = _pixman_implementation_combine_32;
 229     }
 230     else
 231     {
 232         if (component_alpha)
 233             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 234         else
 235             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 236     }
 237
 238     if (!compose)
 239         return;
 240
 241     for (i = 0; i < height; ++i)
 242     {
 243         uint32_t *s, *m, *d;
 244
 245         m = mask_iter.get_scanline (&mask_iter, NULL);
 246         s = src_iter.get_scanline (&src_iter, m);
 247         d = dest_iter.get_scanline (&dest_iter, NULL);
 248
 249         compose (imp->toplevel, op, d, s, m, width);
 250
 251         dest_iter.write_back (&dest_iter);
 252     }
 253
 254     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
 255         free (scanline_buffer);
 256 }
 257
 258 static const pixman_fast_path_t general_fast_path[] =
 259 {
 260     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
 261     { PIXMAN_OP_NONE }
 262 };
 263
 264 static pixman_bool_t
 265 general_blt (pixman_implementation_t *imp,
 266              uint32_t *               src_bits,
 267              uint32_t *               dst_bits,
 268              int                      src_stride,
 269              int                      dst_stride,
 270              int                      src_bpp,
 271              int                      dst_bpp,
 272              int                      src_x,
 273              int                      src_y,
 274              int                      dst_x,
 275              int                      dst_y,
 276              int                      width,
 277              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, general_fast_path);
 302
 303     _pixman_setup_combiner_functions_32 (imp);
 304     _pixman_setup_combiner_functions_64 (imp);
 305
 306     imp->blt = general_blt;
 307     imp->fill = general_fill;
 308     imp->src_iter_init = general_src_iter_init;
 309     imp->dest_iter_init = general_dest_iter_init;
 310
 311     return imp;
 312 }
 313