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annotate include/SDL_pixels.h @ 2198:fe19afb86473

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Split acinclude.m4 into its component parts for easy updating
author Sam Lantinga <slouken@libsdl.org>
date Sun, 15 Jul 2007 01:51:11 +0000
parents a788656ca29a
children b03710fb0333
rev   line source
1895
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /**
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24 * \file SDL_pixels.h
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25 *
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26 * Header for the enumerated pixel format definitions
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27 */
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28
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29 #ifndef _SDL_pixels_h
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30 #define _SDL_pixels_h
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31
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32 #include "begin_code.h"
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33 /* Set up for C function definitions, even when using C++ */
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34 #ifdef __cplusplus
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35 /* *INDENT-OFF* */
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36 extern "C" {
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37 /* *INDENT-ON* */
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38 #endif
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39
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40 enum
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41 { /* Pixel type */
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42 SDL_PIXELTYPE_UNKNOWN,
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43 SDL_PIXELTYPE_INDEX1,
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44 SDL_PIXELTYPE_INDEX4,
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45 SDL_PIXELTYPE_INDEX8,
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46 SDL_PIXELTYPE_PACKED8,
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47 SDL_PIXELTYPE_PACKED16,
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48 SDL_PIXELTYPE_PACKED32,
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49 SDL_PIXELTYPE_ARRAYU8,
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50 SDL_PIXELTYPE_ARRAYU16,
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51 SDL_PIXELTYPE_ARRAYU32,
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52 SDL_PIXELTYPE_ARRAYF16,
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53 SDL_PIXELTYPE_ARRAYF32,
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54 };
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55
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56 enum
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57 { /* bitmap pixel order, high bit -> low bit */
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58 SDL_BITMAPORDER_NONE,
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59 SDL_BITMAPORDER_4321,
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60 SDL_BITMAPORDER_1234,
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61 };
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62 enum
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63 { /* packed component order, high bit -> low bit */
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64 SDL_PACKEDORDER_NONE,
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65 SDL_PACKEDORDER_XRGB,
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66 SDL_PACKEDORDER_RGBX,
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67 SDL_PACKEDORDER_ARGB,
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68 SDL_PACKEDORDER_RGBA,
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69 SDL_PACKEDORDER_XBGR,
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70 SDL_PACKEDORDER_BGRX,
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71 SDL_PACKEDORDER_ABGR,
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72 SDL_PACKEDORDER_BGRA,
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73 };
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74 enum
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75 { /* array component order, low byte -> high byte */
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76 SDL_ARRAYORDER_NONE,
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77 SDL_ARRAYORDER_RGB,
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78 SDL_ARRAYORDER_RGBA,
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79 SDL_ARRAYORDER_ARGB,
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80 SDL_ARRAYORDER_BGR,
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81 SDL_ARRAYORDER_BGRA,
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82 SDL_ARRAYORDER_ABGR,
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83 };
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84
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85 enum
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86 { /* Packed component layout */
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87 SDL_PACKEDLAYOUT_NONE,
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88 SDL_PACKEDLAYOUT_332,
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89 SDL_PACKEDLAYOUT_4444,
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90 SDL_PACKEDLAYOUT_1555,
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91 SDL_PACKEDLAYOUT_5551,
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92 SDL_PACKEDLAYOUT_565,
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93 SDL_PACKEDLAYOUT_8888,
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94 SDL_PACKEDLAYOUT_2101010,
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95 SDL_PACKEDLAYOUT_1010102,
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96 };
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97
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98 #define SDL_DEFINE_PIXELFOURCC(A, B, C, D) \
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99 ((A) | ((B) << 8) | ((C) << 16) | ((D) << 24))
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100
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101 #define SDL_DEFINE_PIXELFORMAT(type, order, layout, bits, bytes) \
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102 ((1 << 31) | ((type) << 24) | ((order) << 20) | ((layout) << 16) | \
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103 ((bits) << 8) | ((bytes) << 0))
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104
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105 #define SDL_PIXELTYPE(X) (((X) >> 24) & 0x0F)
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106 #define SDL_PIXELORDER(X) (((X) >> 20) & 0x0F)
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107 #define SDL_PIXELLAYOUT(X) (((X) >> 16) & 0x0F)
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108 #define SDL_BITSPERPIXEL(X) (((X) >> 8) & 0xFF)
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109 #define SDL_BYTESPERPIXEL(X) (((X) >> 0) & 0xFF)
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110
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111 #define SDL_ISPIXELFORMAT_INDEXED(format) \
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112 ((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \
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113 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
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114 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8))
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115
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116 #define SDL_ISPIXELFORMAT_FOURCC(format) \
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117 ((format) && !((format) & 0x80000000))
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118
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119 enum
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120 {
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121 SDL_PIXELFORMAT_UNKNOWN,
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122 SDL_PIXELFORMAT_INDEX1LSB =
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123 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0,
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124 1, 0),
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125 SDL_PIXELFORMAT_INDEX1MSB =
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126 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_4321, 0,
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127 1, 0),
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128 SDL_PIXELFORMAT_INDEX4LSB =
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129 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_1234, 0,
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130 2, 0),
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131 SDL_PIXELFORMAT_INDEX4MSB =
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132 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0,
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133 2, 0),
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134 SDL_PIXELFORMAT_INDEX8 =
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135 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX8, 0, 0, 8, 1),
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136 SDL_PIXELFORMAT_RGB332 =
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137 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED8, SDL_PACKEDORDER_XRGB,
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138 SDL_PACKEDLAYOUT_332, 8, 1),
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139 SDL_PIXELFORMAT_RGB444 =
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140 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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141 SDL_PACKEDLAYOUT_4444, 12, 2),
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142 SDL_PIXELFORMAT_RGB555 =
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143 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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144 SDL_PACKEDLAYOUT_1555, 15, 2),
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145 SDL_PIXELFORMAT_ARGB4444 =
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146 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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147 SDL_PACKEDLAYOUT_4444, 16, 2),
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148 SDL_PIXELFORMAT_ARGB1555 =
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149 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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150 SDL_PACKEDLAYOUT_1555, 16, 2),
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151 SDL_PIXELFORMAT_RGB565 =
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152 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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153 SDL_PACKEDLAYOUT_565, 16, 2),
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154 SDL_PIXELFORMAT_RGB24 =
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155 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_RGB, 0,
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156 24, 3),
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157 SDL_PIXELFORMAT_BGR24 =
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158 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_BGR, 0,
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159 24, 3),
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160 SDL_PIXELFORMAT_RGB888 =
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161 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XRGB,
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diff changeset
162 SDL_PACKEDLAYOUT_8888, 24, 4),
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163 SDL_PIXELFORMAT_BGR888 =
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164 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XBGR,
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165 SDL_PACKEDLAYOUT_8888, 24, 4),
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166 SDL_PIXELFORMAT_ARGB8888 =
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167 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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168 SDL_PACKEDLAYOUT_8888, 32, 4),
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169 SDL_PIXELFORMAT_RGBA8888 =
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diff changeset
170 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBA,
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171 SDL_PACKEDLAYOUT_8888, 32, 4),
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172 SDL_PIXELFORMAT_ABGR8888 =
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173 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ABGR,
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174 SDL_PACKEDLAYOUT_8888, 32, 4),
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175 SDL_PIXELFORMAT_BGRA8888 =
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176 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRA,
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diff changeset
177 SDL_PACKEDLAYOUT_8888, 32, 4),
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178 SDL_PIXELFORMAT_ARGB2101010 =
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179 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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180 SDL_PACKEDLAYOUT_2101010, 32, 4),
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181
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182 SDL_PIXELFORMAT_YV12 = /* Planar mode: Y + V + U (3 planes) */
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183 SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'),
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184 SDL_PIXELFORMAT_IYUV = /* Planar mode: Y + U + V (3 planes) */
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185 SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'),
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186 SDL_PIXELFORMAT_YUY2 = /* Packed mode: Y0+U0+Y1+V0 (1 plane) */
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187 SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'),
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188 SDL_PIXELFORMAT_UYVY = /* Packed mode: U0+Y0+V0+Y1 (1 plane) */
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189 SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'),
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190 SDL_PIXELFORMAT_YVYU = /* Packed mode: Y0+V0+Y1+U0 (1 plane) */
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191 SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U'),
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192 };
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193
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194 typedef struct SDL_Color
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195 {
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196 Uint8 r;
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197 Uint8 g;
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diff changeset
198 Uint8 b;
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199 Uint8 unused;
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200 } SDL_Color;
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201 #define SDL_Colour SDL_Color
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202
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203 typedef struct SDL_Palette SDL_Palette;
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204 typedef int (*SDL_PaletteChangedFunc) (void *userdata, SDL_Palette * palette);
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205
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206 typedef struct SDL_PaletteWatch
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207 {
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208 SDL_PaletteChangedFunc callback;
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209 void *userdata;
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210 struct SDL_PaletteWatch *next;
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211 } SDL_PaletteWatch;
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212
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213 struct SDL_Palette
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214 {
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215 int ncolors;
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216 SDL_Color *colors;
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217
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218 int refcount;
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219 SDL_PaletteWatch *watch;
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220 };
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221
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222 /* Everything in the pixel format structure is read-only */
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223 typedef struct SDL_PixelFormat
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224 {
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225 SDL_Palette *palette;
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226 Uint8 BitsPerPixel;
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227 Uint8 BytesPerPixel;
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228 Uint8 Rloss;
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229 Uint8 Gloss;
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230 Uint8 Bloss;
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diff changeset
231 Uint8 Aloss;
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232 Uint8 Rshift;
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233 Uint8 Gshift;
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234 Uint8 Bshift;
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235 Uint8 Ashift;
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diff changeset
236 Uint32 Rmask;
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diff changeset
237 Uint32 Gmask;
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238 Uint32 Bmask;
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239 Uint32 Amask;
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240
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241 /* RGB color key information */
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242 Uint32 colorkey;
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243 /* Alpha value information (per-surface alpha) */
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244 Uint8 alpha;
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245 } SDL_PixelFormat;
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246
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247 /**
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248 * \fn SDL_bool SDL_PixelFormatEnumToMasks(Uint32 format, int *bpp, Uint32 * Rmask, Uint32 * Gmask, Uint32 * Bmask, Uint32 * Amask)
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249 *
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250 * \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks.
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251 *
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252 * \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
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253 *
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254 * \sa SDL_MasksToPixelFormatEnum()
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255 */
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256 extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format,
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257 int *bpp,
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258 Uint32 * Rmask,
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259 Uint32 * Gmask,
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260 Uint32 * Bmask,
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261 Uint32 * Amask);
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262
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263 /**
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264 * \fn Uint32 SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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265 *
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266 * \brief Convert a bpp and RGBA masks to an enumerated pixel format.
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267 *
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268 * \return The pixel format, or SDL_PixelFormat_Unknown if the conversion wasn't possible.
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269 *
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270 * \sa SDL_PixelFormatEnumToMasks()
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271 */
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272 extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp,
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273 Uint32 Rmask,
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274 Uint32 Gmask,
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275 Uint32 Bmask,
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276 Uint32 Amask);
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277
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278 /**
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279 * \fn SDL_Palette *SDL_AllocPalette(int ncolors)
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280 *
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281 * \brief Create a palette structure with the specified number of color entries.
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282 *
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283 * \return A new palette, or NULL if there wasn't enough memory
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284 *
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285 * \note The palette entries are initialized to white.
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286 *
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287 * \sa SDL_FreePalette()
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288 */
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289 extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors);
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290
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291 /**
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292 * \fn int SDL_AddPaletteWatch(SDL_Palette *palette, SDL_PaletteChangedFunc callback, void *userdata)
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293 *
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294 * \brief Add a callback function which is called when the palette changes.
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295 *
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296 * \sa SDL_DelPaletteWatch()
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297 */
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298 extern DECLSPEC int SDLCALL SDL_AddPaletteWatch(SDL_Palette * palette,
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299 SDL_PaletteChangedFunc
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300 callback, void *userdata);
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301
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302 /**
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303 * \fn void SDL_DelPaletteWatch(SDL_Palette *palette, SDL_PaletteChangedFunc callback, void *userdata)
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304 *
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305 * \brief Remove a callback function previously added with SDL_AddPaletteWatch()
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306 *
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307 * \sa SDL_AddPaletteWatch()
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308 */
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309 extern DECLSPEC void SDLCALL SDL_DelPaletteWatch(SDL_Palette * palette,
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310 SDL_PaletteChangedFunc
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311 callback, void *userdata);
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312
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313 /**
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314 * \fn int SDL_SetPaletteColors(SDL_Palette *palette, const SDL_Colors *colors, int firstcolor, int numcolors)
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315 *
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316 * \brief Set a range of colors in a palette.
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317 *
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318 * \param palette The palette to modify
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319 * \param colors An array of colors to copy into the palette
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320 * \param firstcolor The index of the first palette entry to modify
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321 * \param ncolors The number of entries to modify
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322 *
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323 * \return 0 on success, or -1 if not all of the colors could be set
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324 */
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325 extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
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326 const SDL_Color * colors,
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327 int firstcolor, int ncolors);
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328
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329 /**
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330 * \fn void SDL_FreePalette(SDL_Palette *palette)
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331 *
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332 * \brief Free a palette created with SDL_AllocPalette()
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333 *
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334 * \sa SDL_AllocPalette()
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335 */
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336 extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
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337
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338 /* Ends C function definitions when using C++ */
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339 #ifdef __cplusplus
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340 /* *INDENT-OFF* */
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341 }
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342 /* *INDENT-ON* */
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343 #endif
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344 #include "close_code.h"
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345
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346 #endif /* _SDL_pixels_h */
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347
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348 /* vi: set ts=4 sw=4 expandtab: */