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 #define SCANLINE_BUFFER_LENGTH 8192
 111
 112 static void
 113 general_composite_rect  (pixman_implementation_t *imp,
 114                          pixman_op_t              op,
 115                          pixman_image_t *         src,
 116                          pixman_image_t *         mask,
 117                          pixman_image_t *         dest,
 118                          int32_t                  src_x,
 119                          int32_t                  src_y,
 120                          int32_t                  mask_x,
 121                          int32_t                  mask_y,
 122                          int32_t                  dest_x,
 123                          int32_t                  dest_y,
 124                          int32_t                  width,
 125                          int32_t                  height)
 126 {
 127     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
 128     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
 129     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
 130     pixman_iter_t src_iter, mask_iter, dest_iter;
 131     pixman_combine_32_func_t compose;
 132     pixman_bool_t component_alpha;
 133     iter_flags_t narrow, dest_flags;
 134     int Bpp;
 135     int i;
 136
 137     if ((src->common.flags & FAST_PATH_NARROW_FORMAT)           &&
 138         (!mask || mask->common.flags & FAST_PATH_NARROW_FORMAT) &&
 139         (dest->common.flags & FAST_PATH_NARROW_FORMAT))
 140     {
 141         narrow = ITER_NARROW;
 142         Bpp = 4;
 143     }
 144     else
 145     {
 146         narrow = 0;
 147         Bpp = 8;
 148     }
 149
 150     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
 151     {
 152         scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
 153
 154         if (!scanline_buffer)
 155             return;
 156     }
 157
 158     src_buffer = scanline_buffer;
 159     mask_buffer = src_buffer + width * Bpp;
 160     dest_buffer = mask_buffer + width * Bpp;
 161
 162     _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src,
 163                                           src_x, src_y, width, height,
 164                                           src_buffer, narrow);
 165
 166     _pixman_implementation_src_iter_init (imp->toplevel, &mask_iter, mask,
 167                                           mask_x, mask_y, width, height,
 168                                           mask_buffer, narrow);
 169
 170     if (op == PIXMAN_OP_CLEAR           ||
 171         op == PIXMAN_OP_SRC             ||
 172         op == PIXMAN_OP_DST             ||
 173         op == PIXMAN_OP_OVER            ||
 174         op == PIXMAN_OP_IN_REVERSE      ||
 175         op == PIXMAN_OP_OUT_REVERSE     ||
 176         op == PIXMAN_OP_ADD)
 177     {
 178         dest_flags = narrow | ITER_LOCALIZED_ALPHA;
 179     }
 180     else
 181     {
 182         dest_flags = narrow;
 183     }
 184
 185     _pixman_implementation_dest_iter_init (imp->toplevel, &dest_iter, dest,
 186                                            dest_x, dest_y, width, height,
 187                                            dest_buffer, dest_flags);
 188
 189     component_alpha =
 190         mask                            &&
 191         mask->common.type == BITS       &&
 192         mask->common.component_alpha    &&
 193         PIXMAN_FORMAT_RGB (mask->bits.format);
 194
 195     if (narrow)
 196     {
 197         if (component_alpha)
 198             compose = _pixman_implementation_combine_32_ca;
 199         else
 200             compose = _pixman_implementation_combine_32;
 201     }
 202     else
 203     {
 204         if (component_alpha)
 205             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
 206         else
 207             compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
 208     }
 209
 210     if (!compose)
 211         return;
 212
 213     for (i = 0; i < height; ++i)
 214     {
 215         uint32_t *s, *m, *d;
 216
 217         m = mask_iter.get_scanline (&mask_iter, NULL);
 218         s = src_iter.get_scanline (&src_iter, m);
 219         d = dest_iter.get_scanline (&dest_iter, NULL);
 220
 221         compose (imp->toplevel, op, d, s, m, width);
 222
 223         dest_iter.write_back (&dest_iter);
 224     }
 225
 226     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
 227         free (scanline_buffer);
 228 }
 229
 230 static const pixman_fast_path_t general_fast_path[] =
 231 {
 232     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
 233     { PIXMAN_OP_NONE }
 234 };
 235
 236 static pixman_bool_t
 237 general_blt (pixman_implementation_t *imp,
 238              uint32_t *               src_bits,
 239              uint32_t *               dst_bits,
 240              int                      src_stride,
 241              int                      dst_stride,
 242              int                      src_bpp,
 243              int                      dst_bpp,
 244              int                      src_x,
 245              int                      src_y,
 246              int                      dst_x,
 247              int                      dst_y,
 248              int                      width,
 249              int                      height)
 250 {
 251     /* We can't blit unless we have sse2 or mmx */
 252
 253     return FALSE;
 254 }
 255
 256 static pixman_bool_t
 257 general_fill (pixman_implementation_t *imp,
 258               uint32_t *               bits,
 259               int                      stride,
 260               int                      bpp,
 261               int                      x,
 262               int                      y,
 263               int                      width,
 264               int                      height,
 265               uint32_t xor)
 266 {
 267     return FALSE;
 268 }
 269
 270 pixman_implementation_t *
 271 _pixman_implementation_create_general (void)
 272 {
 273     pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
 274
 275     _pixman_setup_combiner_functions_32 (imp);
 276     _pixman_setup_combiner_functions_64 (imp);
 277
 278     imp->blt = general_blt;
 279     imp->fill = general_fill;
 280     imp->src_iter_init = general_src_iter_init;
 281     imp->dest_iter_init = general_dest_iter_init;
 282
 283     return imp;
 284 }
 285