source/libs/pixman/pixman-src/pixman/pixman-noop.c

   1 /* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
   2 /*
   3  * Copyright © 2011 Red Hat, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include "pixman-private.h"
  30 #include "pixman-combine32.h"
  31 #include "pixman-inlines.h"
  32
  33 static void
  34 noop_composite (pixman_implementation_t *imp,
  35                 pixman_composite_info_t *info)
  36 {
  37     return;
  38 }
  39
  40 static uint32_t *
  41 noop_get_scanline (pixman_iter_t *iter, const uint32_t *mask)
  42 {
  43     uint32_t *result = iter->buffer;
  44
  45     iter->buffer += iter->image->bits.rowstride;
  46
  47     return result;
  48 }
  49
  50 static void
  51 noop_init_solid_narrow (pixman_iter_t *iter,
  52                         const pixman_iter_info_t *info)
  53 {
  54     pixman_image_t *image = iter->image;
  55     uint32_t *buffer = iter->buffer;
  56     uint32_t *end = buffer + iter->width;
  57     uint32_t color;
  58
  59     if (iter->image->type == SOLID)
  60         color = image->solid.color_32;
  61     else
  62         color = image->bits.fetch_pixel_32 (&image->bits, 0, 0);
  63
  64     while (buffer < end)
  65         *(buffer++) = color;
  66 }
  67
  68 static void
  69 noop_init_solid_wide (pixman_iter_t *iter,
  70                       const pixman_iter_info_t *info)
  71 {
  72     pixman_image_t *image = iter->image;
  73     argb_t *buffer = (argb_t *)iter->buffer;
  74     argb_t *end = buffer + iter->width;
  75     argb_t color;
  76
  77     if (iter->image->type == SOLID)
  78         color = image->solid.color_float;
  79     else
  80         color = image->bits.fetch_pixel_float (&image->bits, 0, 0);
  81
  82     while (buffer < end)
  83         *(buffer++) = color;
  84 }
  85
  86 static void
  87 noop_init_direct_buffer (pixman_iter_t *iter, const pixman_iter_info_t *info)
  88 {
  89     pixman_image_t *image = iter->image;
  90
  91     iter->buffer =
  92         image->bits.bits + iter->y * image->bits.rowstride + iter->x;
  93 }
  94
  95 static void
  96 dest_write_back_direct (pixman_iter_t *iter)
  97 {
  98     iter->buffer += iter->image->bits.rowstride;
  99 }
 100
 101 static const pixman_iter_info_t noop_iters[] =
 102 {
 103     /* Source iters */
 104     { PIXMAN_any,
 105       0, ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_SRC,
 106       NULL,
 107       _pixman_iter_get_scanline_noop,
 108       NULL
 109     },
 110     { PIXMAN_solid,
 111       FAST_PATH_NO_ALPHA_MAP, ITER_NARROW | ITER_SRC,
 112       noop_init_solid_narrow,
 113       _pixman_iter_get_scanline_noop,
 114       NULL,
 115     },
 116     { PIXMAN_solid,
 117       FAST_PATH_NO_ALPHA_MAP, ITER_WIDE | ITER_SRC,
 118       noop_init_solid_wide,
 119       _pixman_iter_get_scanline_noop,
 120       NULL
 121     },
 122     { PIXMAN_a8r8g8b8,
 123       FAST_PATH_STANDARD_FLAGS | FAST_PATH_ID_TRANSFORM |
 124           FAST_PATH_BITS_IMAGE | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST,
 125       ITER_NARROW | ITER_SRC,
 126       noop_init_direct_buffer,
 127       noop_get_scanline,
 128       NULL
 129     },
 130     /* Dest iters */
 131     { PIXMAN_a8r8g8b8,
 132       FAST_PATH_STD_DEST_FLAGS, ITER_NARROW | ITER_DEST,
 133       noop_init_direct_buffer,
 134       _pixman_iter_get_scanline_noop,
 135       dest_write_back_direct
 136     },
 137     { PIXMAN_x8r8g8b8,
 138       FAST_PATH_STD_DEST_FLAGS, ITER_NARROW | ITER_DEST | ITER_LOCALIZED_ALPHA,
 139       noop_init_direct_buffer,
 140       _pixman_iter_get_scanline_noop,
 141       dest_write_back_direct
 142     },
 143     { PIXMAN_null },
 144 };
 145
 146 static const pixman_fast_path_t noop_fast_paths[] =
 147 {
 148     { PIXMAN_OP_DST, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, noop_composite },
 149     { PIXMAN_OP_NONE },
 150 };
 151
 152 pixman_implementation_t *
 153 _pixman_implementation_create_noop (pixman_implementation_t *fallback)
 154 {
 155     pixman_implementation_t *imp =
 156         _pixman_implementation_create (fallback, noop_fast_paths);
 157
 158     imp->iter_info = noop_iters;
 159
 160     return imp;
 161 }