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annotate include/SDL_pixels.h @ 4573:6399178be313

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Completed work on X11_CreateTexture. Added lots of safety features. These include support for drawing a texture using the core protocol while other textures are drawn using Xrender if Xrender does not support the color format of the said texture or any other fault with Xrender.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 28 May 2010 20:40:09 +0530
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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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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200 SDL_PACKEDLAYOUT_8888, 24, 4),
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201 SDL_PIXELFORMAT_ARGB8888 =
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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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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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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* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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392 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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: */