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annotate include/SDL_pixels.h @ 1683:396a35389351 SDL-1.3

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Finished palettized display handling. Added support for surface palette sharing.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 17 Jun 2006 06:45:14 +0000
parents 7ae8018b2e5d
children c4aa1a2f48f1
rev   line source
1662
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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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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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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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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 = SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'),
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183 SDL_PixelFormat_IYUV = SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'),
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184 SDL_PixelFormat_YUY2 = SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'),
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185 SDL_PixelFormat_UYVY = SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'),
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186 SDL_PixelFormat_YVYU = SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U'),
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187 };
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188
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189 typedef struct SDL_Color
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190 {
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191 Uint8 r;
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192 Uint8 g;
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193 Uint8 b;
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194 Uint8 unused;
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195 } SDL_Color;
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196 #define SDL_Colour SDL_Color
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197
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198 typedef struct SDL_Palette SDL_Palette;
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199 typedef int (*SDL_PaletteChangedFunc) (void *userdata, SDL_Palette * palette);
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200
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201 typedef struct SDL_PaletteWatch
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202 {
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203 SDL_PaletteChangedFunc callback;
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204 void *userdata;
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205 struct SDL_PaletteWatch *next;
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206 } SDL_PaletteWatch;
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207
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208 struct SDL_Palette
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209 {
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210 int ncolors;
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211 SDL_Color *colors;
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212
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213 int refcount;
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214 SDL_PaletteWatch *watch;
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215 };
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216
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217 /* Everything in the pixel format structure is read-only */
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218 typedef struct SDL_PixelFormat
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219 {
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220 SDL_Palette *palette;
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221 Uint8 BitsPerPixel;
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222 Uint8 BytesPerPixel;
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223 Uint8 Rloss;
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224 Uint8 Gloss;
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225 Uint8 Bloss;
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226 Uint8 Aloss;
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227 Uint8 Rshift;
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228 Uint8 Gshift;
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229 Uint8 Bshift;
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230 Uint8 Ashift;
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231 Uint32 Rmask;
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232 Uint32 Gmask;
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233 Uint32 Bmask;
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234 Uint32 Amask;
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235
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236 /* RGB color key information */
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237 Uint32 colorkey;
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238 /* Alpha value information (per-surface alpha) */
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239 Uint8 alpha;
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240 } SDL_PixelFormat;
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241
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242 /**
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243 * \fn SDL_bool SDL_PixelFormatEnumToMasks(Uint32 format, int *bpp, Uint32 * Rmask, Uint32 * Gmask, Uint32 * Bmask, Uint32 * Amask)
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244 *
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245 * \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks.
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246 *
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247 * \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
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248 *
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249 * \sa SDL_MasksToPixelFormatEnum()
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250 */
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251 extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format,
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252 int *bpp,
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253 Uint32 * Rmask,
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254 Uint32 * Gmask,
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255 Uint32 * Bmask,
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256 Uint32 * Amask);
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257
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258 /**
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259 * \fn Uint32 SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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260 *
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261 * \brief Convert a bpp and RGBA masks to an enumerated pixel format.
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262 *
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263 * \return The pixel format, or SDL_PixelFormat_Unknown if the conversion wasn't possible.
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264 *
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265 * \sa SDL_PixelFormatEnumToMasks()
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266 */
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267 extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp,
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268 Uint32 Rmask,
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269 Uint32 Gmask,
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270 Uint32 Bmask,
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271 Uint32 Amask);
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272
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273 /**
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274 * \fn SDL_Palette *SDL_AllocPalette(int ncolors)
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275 *
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276 * \brief Create a palette structure with the specified number of color entries.
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277 *
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278 * \return A new palette, or NULL if there wasn't enough memory
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279 *
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280 * \note The palette entries are initialized to white.
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281 *
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282 * \sa SDL_FreePalette()
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283 */
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284 extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors);
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285
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286 /**
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287 * \fn int SDL_AddPaletteWatch(SDL_Palette *palette, SDL_PaletteChangedFunc callback, void *userdata)
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288 *
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289 * \brief Add a callback function which is called when the palette changes.
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290 *
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291 * \sa SDL_DelPaletteWatch()
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292 */
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293 extern DECLSPEC int SDLCALL SDL_AddPaletteWatch(SDL_Palette * palette,
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294 SDL_PaletteChangedFunc
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295 callback, void *userdata);
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296
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297 /**
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298 * \fn void SDL_DelPaletteWatch(SDL_Palette *palette, SDL_PaletteChangedFunc callback, void *userdata)
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299 *
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300 * \brief Remove a callback function previously added with SDL_AddPaletteWatch()
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301 *
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302 * \sa SDL_AddPaletteWatch()
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303 */
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304 extern DECLSPEC void SDLCALL SDL_DelPaletteWatch(SDL_Palette * palette,
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305 SDL_PaletteChangedFunc
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306 callback, void *userdata);
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307
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308 /**
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309 * \fn int SDL_SetPaletteColors(SDL_Palette *palette, const SDL_Colors *colors, int firstcolor, int numcolors)
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310 *
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311 * \brief Set a range of colors in a palette.
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312 *
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313 * \param palette The palette to modify
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314 * \param colors An array of colors to copy into the palette
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315 * \param firstcolor The index of the first palette entry to modify
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316 * \param ncolors The number of entries to modify
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317 *
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318 * \return 0 on success, or -1 if not all of the colors could be set
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319 */
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320 extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
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321 const SDL_Color * colors,
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322 int firstcolor, int ncolors);
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323
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324 /**
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325 * \fn void SDL_FreePalette(SDL_Palette *palette)
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326 *
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327 * \brief Free a palette created with SDL_AllocPalette()
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328 *
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329 * \sa SDL_AllocPalette()
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330 */
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331 extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
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332
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333 /* Ends C function definitions when using C++ */
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334 #ifdef __cplusplus
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335 /* *INDENT-OFF* */
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336 }
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337 /* *INDENT-ON* */
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338 #endif
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339 #include "close_code.h"
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340
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341 #endif /* _SDL_pixels_h */
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342
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343 /* vi: set ts=4 sw=4 expandtab: */