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annotate include/SDL_pixels.h @ 4446:8b03a20b320f

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Much improved multi-display support for iPad. Fixes most issues and limitations, I think.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 02 May 2010 05:08:12 -0400
parents f7b03b6838cb
children bff93336121e
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 /**
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41 * \name Transparency definitions
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42 *
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43 * These define alpha as the opacity of a surface.
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44 */
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45 /*@{*/
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46 #define SDL_ALPHA_OPAQUE 255
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47 #define SDL_ALPHA_TRANSPARENT 0
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48 /*@}*/
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49
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50 /** Pixel type. */
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51 enum
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52 {
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53 SDL_PIXELTYPE_UNKNOWN,
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54 SDL_PIXELTYPE_INDEX1,
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55 SDL_PIXELTYPE_INDEX4,
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56 SDL_PIXELTYPE_INDEX8,
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57 SDL_PIXELTYPE_PACKED8,
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58 SDL_PIXELTYPE_PACKED16,
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59 SDL_PIXELTYPE_PACKED32,
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60 SDL_PIXELTYPE_ARRAYU8,
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61 SDL_PIXELTYPE_ARRAYU16,
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62 SDL_PIXELTYPE_ARRAYU32,
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63 SDL_PIXELTYPE_ARRAYF16,
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64 SDL_PIXELTYPE_ARRAYF32
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65 };
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66
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67 /** Bitmap pixel order, high bit -> low bit. */
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68 enum
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69 {
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70 SDL_BITMAPORDER_NONE,
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71 SDL_BITMAPORDER_4321,
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72 SDL_BITMAPORDER_1234
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73 };
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74
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75 /** Packed component order, high bit -> low bit. */
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76 enum
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77 {
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78 SDL_PACKEDORDER_NONE,
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79 SDL_PACKEDORDER_XRGB,
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80 SDL_PACKEDORDER_RGBX,
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81 SDL_PACKEDORDER_ARGB,
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82 SDL_PACKEDORDER_RGBA,
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83 SDL_PACKEDORDER_XBGR,
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84 SDL_PACKEDORDER_BGRX,
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85 SDL_PACKEDORDER_ABGR,
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86 SDL_PACKEDORDER_BGRA
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87 };
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88
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89 /** Array component order, low byte -> high byte. */
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90 enum
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91 {
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92 SDL_ARRAYORDER_NONE,
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93 SDL_ARRAYORDER_RGB,
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94 SDL_ARRAYORDER_RGBA,
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95 SDL_ARRAYORDER_ARGB,
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96 SDL_ARRAYORDER_BGR,
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97 SDL_ARRAYORDER_BGRA,
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98 SDL_ARRAYORDER_ABGR
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99 };
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100
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101 /** Packed component layout. */
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102 enum
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103 {
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104 SDL_PACKEDLAYOUT_NONE,
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105 SDL_PACKEDLAYOUT_332,
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106 SDL_PACKEDLAYOUT_4444,
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107 SDL_PACKEDLAYOUT_1555,
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108 SDL_PACKEDLAYOUT_5551,
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109 SDL_PACKEDLAYOUT_565,
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110 SDL_PACKEDLAYOUT_8888,
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111 SDL_PACKEDLAYOUT_2101010,
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112 SDL_PACKEDLAYOUT_1010102
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113 };
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114
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115 #define SDL_DEFINE_PIXELFOURCC(A, B, C, D) \
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116 ((A) | ((B) << 8) | ((C) << 16) | ((D) << 24))
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117
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118 #define SDL_DEFINE_PIXELFORMAT(type, order, layout, bits, bytes) \
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119 ((1 << 31) | ((type) << 24) | ((order) << 20) | ((layout) << 16) | \
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120 ((bits) << 8) | ((bytes) << 0))
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121
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122 #define SDL_PIXELTYPE(X) (((X) >> 24) & 0x0F)
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123 #define SDL_PIXELORDER(X) (((X) >> 20) & 0x0F)
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124 #define SDL_PIXELLAYOUT(X) (((X) >> 16) & 0x0F)
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125 #define SDL_BITSPERPIXEL(X) (((X) >> 8) & 0xFF)
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126 #define SDL_BYTESPERPIXEL(X) (((X) >> 0) & 0xFF)
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127
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128 #define SDL_ISPIXELFORMAT_INDEXED(format) \
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129 ((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \
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130 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
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131 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8))
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132
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133 #define SDL_ISPIXELFORMAT_ALPHA(format) \
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134 ((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \
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135 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \
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136 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \
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137 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))
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138
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139 #define SDL_ISPIXELFORMAT_FOURCC(format) \
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140 ((format) && !((format) & 0x80000000))
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141
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diff changeset
142 enum
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143 {
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144 SDL_PIXELFORMAT_UNKNOWN,
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145 SDL_PIXELFORMAT_INDEX1LSB =
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146 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0,
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147 1, 0),
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148 SDL_PIXELFORMAT_INDEX1MSB =
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149 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_4321, 0,
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150 1, 0),
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151 SDL_PIXELFORMAT_INDEX4LSB =
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152 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_1234, 0,
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153 4, 0),
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154 SDL_PIXELFORMAT_INDEX4MSB =
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155 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0,
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156 4, 0),
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157 SDL_PIXELFORMAT_INDEX8 =
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158 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX8, 0, 0, 8, 1),
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159 SDL_PIXELFORMAT_RGB332 =
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160 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED8, SDL_PACKEDORDER_XRGB,
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161 SDL_PACKEDLAYOUT_332, 8, 1),
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162 SDL_PIXELFORMAT_RGB444 =
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163 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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164 SDL_PACKEDLAYOUT_4444, 12, 2),
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165 SDL_PIXELFORMAT_RGB555 =
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166 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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167 SDL_PACKEDLAYOUT_1555, 15, 2),
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168 SDL_PIXELFORMAT_BGR555 =
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169 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
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170 SDL_PACKEDLAYOUT_1555, 15, 2),
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171 SDL_PIXELFORMAT_ARGB4444 =
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172 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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173 SDL_PACKEDLAYOUT_4444, 16, 2),
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174 SDL_PIXELFORMAT_ABGR4444 =
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175 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
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176 SDL_PACKEDLAYOUT_4444, 16, 2),
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177 SDL_PIXELFORMAT_ARGB1555 =
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178 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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179 SDL_PACKEDLAYOUT_1555, 16, 2),
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180 SDL_PIXELFORMAT_ABGR1555 =
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181 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
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182 SDL_PACKEDLAYOUT_1555, 16, 2),
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183 SDL_PIXELFORMAT_RGB565 =
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184 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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185 SDL_PACKEDLAYOUT_565, 16, 2),
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186 SDL_PIXELFORMAT_BGR565 =
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187 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
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188 SDL_PACKEDLAYOUT_565, 16, 2),
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189 SDL_PIXELFORMAT_RGB24 =
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190 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_RGB, 0,
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191 24, 3),
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192 SDL_PIXELFORMAT_BGR24 =
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193 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_BGR, 0,
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194 24, 3),
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195 SDL_PIXELFORMAT_RGB888 =
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196 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XRGB,
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diff changeset
197 SDL_PACKEDLAYOUT_8888, 24, 4),
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198 SDL_PIXELFORMAT_BGR888 =
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199 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XBGR,
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diff changeset
200 SDL_PACKEDLAYOUT_8888, 24, 4),
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diff changeset
201 SDL_PIXELFORMAT_ARGB8888 =
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diff changeset
202 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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diff changeset
203 SDL_PACKEDLAYOUT_8888, 32, 4),
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204 SDL_PIXELFORMAT_RGBA8888 =
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205 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBA,
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diff changeset
206 SDL_PACKEDLAYOUT_8888, 32, 4),
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207 SDL_PIXELFORMAT_ABGR8888 =
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208 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ABGR,
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diff changeset
209 SDL_PACKEDLAYOUT_8888, 32, 4),
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210 SDL_PIXELFORMAT_BGRA8888 =
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diff changeset
211 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRA,
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diff changeset
212 SDL_PACKEDLAYOUT_8888, 32, 4),
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diff changeset
213 SDL_PIXELFORMAT_ARGB2101010 =
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diff changeset
214 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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diff changeset
215 SDL_PACKEDLAYOUT_2101010, 32, 4),
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216
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217 SDL_PIXELFORMAT_YV12 = /**< Planar mode: Y + V + U (3 planes) */
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218 SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'),
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219 SDL_PIXELFORMAT_IYUV = /**< Planar mode: Y + U + V (3 planes) */
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220 SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'),
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221 SDL_PIXELFORMAT_YUY2 = /**< Packed mode: Y0+U0+Y1+V0 (1 plane) */
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222 SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'),
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223 SDL_PIXELFORMAT_UYVY = /**< Packed mode: U0+Y0+V0+Y1 (1 plane) */
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224 SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'),
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225 SDL_PIXELFORMAT_YVYU = /**< Packed mode: Y0+V0+Y1+U0 (1 plane) */
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226 SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U')
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227 };
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228
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229 typedef struct SDL_Color
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230 {
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231 Uint8 r;
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232 Uint8 g;
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233 Uint8 b;
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234 Uint8 unused;
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235 } SDL_Color;
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236 #define SDL_Colour SDL_Color
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237
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238 typedef struct SDL_Palette SDL_Palette;
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239 typedef int (*SDL_PaletteChangedFunc) (void *userdata, SDL_Palette * palette);
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240 typedef struct SDL_PaletteWatch SDL_PaletteWatch;
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241
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242 struct SDL_Palette
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243 {
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244 int ncolors;
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245 SDL_Color *colors;
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246
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247 int refcount;
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248 SDL_PaletteWatch *watch;
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249 };
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250
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251 /**
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252 * \note Everything in the pixel format structure is read-only.
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253 */
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254 typedef struct SDL_PixelFormat
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255 {
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256 SDL_Palette *palette;
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257 Uint8 BitsPerPixel;
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258 Uint8 BytesPerPixel;
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259 Uint8 Rloss;
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260 Uint8 Gloss;
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261 Uint8 Bloss;
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262 Uint8 Aloss;
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263 Uint8 Rshift;
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264 Uint8 Gshift;
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265 Uint8 Bshift;
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266 Uint8 Ashift;
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267 Uint32 Rmask;
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268 Uint32 Gmask;
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269 Uint32 Bmask;
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270 Uint32 Amask;
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271 } SDL_PixelFormat;
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272
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273 /**
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274 * \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks.
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275 *
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276 * \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
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277 *
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278 * \sa SDL_MasksToPixelFormatEnum()
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279 */
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280 extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format,
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281 int *bpp,
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282 Uint32 * Rmask,
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283 Uint32 * Gmask,
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284 Uint32 * Bmask,
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285 Uint32 * Amask);
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286
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287 /**
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288 * \brief Convert a bpp and RGBA masks to an enumerated pixel format.
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289 *
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290 * \return The pixel format, or ::SDL_PIXELFORMAT_UNKNOWN if the conversion
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291 * wasn't possible.
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292 *
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293 * \sa SDL_PixelFormatEnumToMasks()
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294 */
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295 extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp,
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296 Uint32 Rmask,
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297 Uint32 Gmask,
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298 Uint32 Bmask,
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299 Uint32 Amask);
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300
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301 /**
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302 * \brief Create a palette structure with the specified number of color
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303 * entries.
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304 *
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305 * \return A new palette, or NULL if there wasn't enough memory.
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306 *
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307 * \note The palette entries are initialized to white.
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308 *
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309 * \sa SDL_FreePalette()
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310 */
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311 extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors);
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312
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313 /**
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314 * \brief Add a callback function which is called when the palette changes.
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315 *
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316 * \sa SDL_DelPaletteWatch()
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317 */
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318 extern DECLSPEC int SDLCALL SDL_AddPaletteWatch(SDL_Palette * palette,
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319 SDL_PaletteChangedFunc
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320 callback, void *userdata);
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321
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322 /**
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323 * \brief Remove a callback function previously added with
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324 * SDL_AddPaletteWatch().
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325 *
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326 * \sa SDL_AddPaletteWatch()
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327 */
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328 extern DECLSPEC void SDLCALL SDL_DelPaletteWatch(SDL_Palette * palette,
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329 SDL_PaletteChangedFunc
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330 callback, void *userdata);
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331
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332 /**
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333 * \brief Set a range of colors in a palette.
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334 *
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335 * \param palette The palette to modify.
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336 * \param colors An array of colors to copy into the palette.
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337 * \param firstcolor The index of the first palette entry to modify.
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338 * \param ncolors The number of entries to modify.
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339 *
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340 * \return 0 on success, or -1 if not all of the colors could be set.
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341 */
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342 extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
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343 const SDL_Color * colors,
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344 int firstcolor, int ncolors);
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345
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346 /**
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347 * \brief Free a palette created with SDL_AllocPalette().
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348 *
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349 * \sa SDL_AllocPalette()
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350 */
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351 extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
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352
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353 /**
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354 * \brief Maps an RGB triple to an opaque pixel value for a given pixel format.
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355 *
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356 * \sa SDL_MapRGBA
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357 */
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358 extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat * format,
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359 Uint8 r, Uint8 g, Uint8 b);
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360
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361 /**
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362 * \brief Maps an RGBA quadruple to a pixel value for a given pixel format.
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363 *
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364 * \sa SDL_MapRGB
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365 */
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366 extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * format,
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367 Uint8 r, Uint8 g, Uint8 b,
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368 Uint8 a);
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369
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370 /**
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371 * \brief Get the RGB components from a pixel of the specified format.
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372 *
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373 * \sa SDL_GetRGBA
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374 */
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375 extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel,
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376 const SDL_PixelFormat * format,
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377 Uint8 * r, Uint8 * g, Uint8 * b);
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378
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379 /**
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380 * \brief Get the RGBA components from a pixel of the specified format.
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381 *
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382 * \sa SDL_GetRGB
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383 */
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384 extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel,
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385 const SDL_PixelFormat * format,
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386 Uint8 * r, Uint8 * g, Uint8 * b,
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387 Uint8 * a);
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388
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389 /* Ends C function definitions when using C++ */
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390 #ifdef __cplusplus
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391 /* *INDENT-OFF* */
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392 }
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393 /* *INDENT-ON* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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394 #endif
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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395 #include "close_code.h"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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396
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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397 #endif /* _SDL_pixels_h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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398
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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399 /* vi: set ts=4 sw=4 expandtab: */