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annotate include/SDL_pixels.h @ 1675:d33dcfc3fde7 SDL-1.3

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Overlay functions are being replaced by YUV textures. If the driver doesn't support YUV textures, they can be emulated by backing the texture with an RGB texture and using the software conversion routines. Note that it doesn't make sense to lock a portion of a YV12 texture, since you'd need to return three pixel pointers and pitch values instead of the one that's available through the API. I'm guessing that's one of the reasons DirectX 9 doesn't support this format at all.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 11 Jun 2006 07:30:16 +0000
parents 4da1ee79c9af
children e136f3ffdc1b
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 enum
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112 {
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113 SDL_PixelFormat_Unknown,
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114 SDL_PixelFormat_Index1LSB =
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115 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Index1, SDL_BitmapOrder_1234, 0,
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116 1, 0),
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117 SDL_PixelFormat_Index1MSB =
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118 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Index1, SDL_BitmapOrder_4321, 0,
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119 1, 0),
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120 SDL_PixelFormat_Index4LSB =
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121 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Index4, SDL_BitmapOrder_1234, 0,
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122 2, 0),
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123 SDL_PixelFormat_Index4MSB =
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124 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Index4, SDL_BitmapOrder_4321, 0,
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125 2, 0),
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126 SDL_PixelFormat_Index8 =
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127 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Index8, 0, 0, 8, 1),
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128 SDL_PixelFormat_RGB332 =
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129 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed8, SDL_PackedOrder_XRGB,
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130 SDL_PackedLayout_332, 8, 1),
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131 SDL_PixelFormat_RGB444 =
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132 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed16, SDL_PackedOrder_XRGB,
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133 SDL_PackedLayout_4444, 12, 2),
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134 SDL_PixelFormat_RGB555 =
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135 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed16, SDL_PackedOrder_XRGB,
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136 SDL_PackedLayout_1555, 15, 2),
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137 SDL_PixelFormat_ARGB4444 =
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138 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed16, SDL_PackedOrder_ARGB,
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139 SDL_PackedLayout_4444, 16, 2),
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140 SDL_PixelFormat_ARGB1555 =
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141 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed16, SDL_PackedOrder_ARGB,
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142 SDL_PackedLayout_1555, 16, 2),
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143 SDL_PixelFormat_RGB565 =
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144 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed16, SDL_PackedOrder_XRGB,
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145 SDL_PackedLayout_565, 16, 2),
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146 SDL_PixelFormat_RGB24 =
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147 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_ArrayU8, SDL_ArrayOrder_RGB, 0,
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148 24, 3),
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149 SDL_PixelFormat_BGR24 =
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150 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_ArrayU8, SDL_ArrayOrder_BGR, 0,
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151 24, 3),
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152 SDL_PixelFormat_RGB888 =
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153 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_XRGB,
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154 SDL_PackedLayout_8888, 24, 4),
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155 SDL_PixelFormat_BGR888 =
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156 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_XBGR,
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157 SDL_PackedLayout_8888, 24, 4),
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158 SDL_PixelFormat_ARGB8888 =
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159 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_ARGB,
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160 SDL_PackedLayout_8888, 32, 4),
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161 SDL_PixelFormat_RGBA8888 =
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162 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_RGBA,
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163 SDL_PackedLayout_8888, 32, 4),
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164 SDL_PixelFormat_ABGR8888 =
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165 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_ABGR,
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166 SDL_PackedLayout_8888, 32, 4),
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167 SDL_PixelFormat_BGRA8888 =
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168 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_BGRA,
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169 SDL_PackedLayout_8888, 32, 4),
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170 SDL_PixelFormat_ARGB2101010 =
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171 SDL_DEFINE_PIXELFORMAT(SDL_PixelType_Packed32, SDL_PackedOrder_ARGB,
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172 SDL_PackedLayout_2101010, 32, 4),
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173
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174 SDL_PixelFormat_YV12 = SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'),
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175 SDL_PixelFormat_IYUV = SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'),
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176 SDL_PixelFormat_YUY2 = SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'),
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177 SDL_PixelFormat_UYVY = SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'),
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178 SDL_PixelFormat_YVYU = SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U'),
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179 };
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180
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181 typedef struct SDL_Color
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182 {
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183 Uint8 r;
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184 Uint8 g;
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185 Uint8 b;
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186 Uint8 unused;
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187 } SDL_Color;
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188 #define SDL_Colour SDL_Color
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189
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190 typedef struct SDL_Palette
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191 {
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192 int ncolors;
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193 SDL_Color *colors;
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194 } SDL_Palette;
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195
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196 /* Everything in the pixel format structure is read-only */
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197 typedef struct SDL_PixelFormat
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198 {
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199 SDL_Palette *palette;
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200 Uint8 BitsPerPixel;
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201 Uint8 BytesPerPixel;
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202 Uint8 Rloss;
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203 Uint8 Gloss;
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204 Uint8 Bloss;
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205 Uint8 Aloss;
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206 Uint8 Rshift;
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207 Uint8 Gshift;
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208 Uint8 Bshift;
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209 Uint8 Ashift;
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210 Uint32 Rmask;
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211 Uint32 Gmask;
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212 Uint32 Bmask;
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213 Uint32 Amask;
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214
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215 /* RGB color key information */
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216 Uint32 colorkey;
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217 /* Alpha value information (per-surface alpha) */
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218 Uint8 alpha;
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219 } SDL_PixelFormat;
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220
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221 /*
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222 * Convert one of the enumerated formats above to a bpp and RGBA masks.
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223 * Returns SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
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224 */
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225 extern DECLSPEC SDL_bool SDL_PixelFormatEnumToMasks(Uint32 format, int *bpp,
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226 Uint32 * Rmask,
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227 Uint32 * Gmask,
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228 Uint32 * Bmask,
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229 Uint32 * Amask);
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230
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231 /*
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232 * Convert a bpp and RGBA masks to one of the enumerated formats above.
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233 * Returns SDL_PixelFormat_Unknown if the conversion wasn't possible.
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234 */
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235 extern DECLSPEC Uint32 SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask,
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236 Uint32 Gmask, Uint32 Bmask,
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237 Uint32 Amask);
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238
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239 /* Ends C function definitions when using C++ */
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240 #ifdef __cplusplus
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241 /* *INDENT-OFF* */
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242 }
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243 /* *INDENT-ON* */
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244 #endif
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245 #include "close_code.h"
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246
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247 #endif /* _SDL_pixels_h */
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248
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249 /* vi: set ts=4 sw=4 expandtab: */