1 /* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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2 * |
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3 * Permission is hereby granted, free of charge, to any person obtaining a |
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4 * copy of this software and /or associated documentation files |
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5 * (the "Materials "), to deal in the Materials without restriction, |
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6 * including without limitation the rights to use, copy, modify, merge, |
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7 * publish, distribute, sublicense, and/or sell copies of the Materials, |
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8 * and to permit persons to whom the Materials are furnished to do so, |
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9 * subject to the following conditions: |
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10 * |
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11 * The above copyright notice and this permission notice shall be included |
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12 * in all copies or substantial portions of the Materials. |
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13 * |
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14 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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17 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
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18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR |
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20 * THE USE OR OTHER DEALINGS IN THE MATERIALS. |
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21 */ |
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22 |
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23 #ifndef __RIUTILS_H_ |
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24 # include "riUtils.h" |
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25 #endif |
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26 |
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27 #include <string.h> |
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28 |
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29 namespace OpenVGRI |
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30 { |
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31 |
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32 /** |
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33 * \brief Sets mem areas to byte(s) in c. |
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34 * \param dst Destination pointer. |
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35 * \param c Data to set into dst. |
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36 * \param nElements Amount of elements to set. |
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37 * \param nBytesPerElement Amount of bytes for each element. |
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38 * \note This is moslty an image-settings support function. It is assumed that several |
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39 * bytes / elements can be set at once, especially in 3-byte case. |
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40 */ |
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41 void riMemSet32(void* dst, RIuint32 c, size_t nElements, size_t nBytesPerElement) |
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42 { |
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43 // \todo This function should be called from a function that handles npot element sizes. |
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44 // \todo Investigate the status of (open) std::fill implementations. Some of that code |
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45 // did not _seem_ to bundle sets or use SSE, etc. |
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46 // \todo Use SSE instructions on Intel? |
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47 |
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48 RI_ASSERT(dst); |
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49 RI_ASSERT(nElements); |
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50 |
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51 switch(nBytesPerElement) |
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52 { |
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53 case 4: |
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54 { |
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55 RIuint32* ptr = (RIuint32*)dst; |
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56 do { |
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57 *ptr++ = c; |
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58 } while(--nElements); |
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59 break; |
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60 } |
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61 case 3: |
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62 { |
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63 // \todo Endianness. |
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64 RIuint8* ptr = (RIuint8*)dst; |
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65 RIuint8 b[3]; |
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66 b[0] = c & 0xff; |
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67 b[1] = (c >> 8)&0xff; |
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68 b[2] = (c >> 16)&0xff; |
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69 do { |
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70 *ptr++ = b[0]; |
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71 *ptr++ = b[1]; |
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72 *ptr++ = b[2]; |
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73 } while(--nElements); |
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74 break; |
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75 } |
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76 case 2: |
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77 { |
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78 size_t dws = nElements / 2; |
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79 if (dws) |
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80 { |
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81 RIuint32* ptr32 = (RIuint32*)dst; |
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82 dst = (void*)(((RIuint8*)dst + dws * 4)); |
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83 RIuint32 dw = c | (c<<16); |
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84 do { |
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85 *ptr32++ = dw; |
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86 } while(--dws); |
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87 nElements &= 0x01; |
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88 } |
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89 if (nElements) |
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90 { |
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91 RIuint16 *ptr16 = (RIuint16*)dst; |
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92 const RIuint16 w = (RIuint16)c; |
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93 do { |
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94 *ptr16++ = w; |
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95 } while(--nElements); |
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96 } |
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97 break; |
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98 } |
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99 default: |
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100 { |
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101 RI_ASSERT(nBytesPerElement == 1); |
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102 memset(dst, c, nElements); |
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103 break; |
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104 } |
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105 } |
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106 |
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107 } |
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108 |
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109 /** |
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110 * \brief Insert bits into an array of 32-bit integers. |
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111 * \param hashSize Size of array in bytes. |
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112 * \param bits Actual bits to insert. |
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113 * \param bitSize Amount of bits to insert (max 32). |
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114 * \param bitPtr Pointer to first bit to insert [0 .. (hashSize*8)-1] |
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115 */ |
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116 int riInsertBits32(RIuint32* hash, size_t hashSize, RIuint32 bits, RIuint32 bitSize, int bitPtr) |
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117 { |
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118 RI_ASSERT(bitSize > 0 && bitSize <= 32); |
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119 RI_ASSERT(bits < (1u<<bitSize)); |
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120 RI_ASSERT((bitPtr + bitSize) < (hashSize * 32)); |
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121 |
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122 int idw = bitPtr >> 5; |
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123 int ib = bitPtr - (idw << 5); |
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124 |
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125 if ((ib + bitSize) > 32) |
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126 { |
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127 int rb = ((ib + bitSize) - 32) + 1; |
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128 RI_ASSERT(rb > 0); |
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129 hash[idw] |= (bits << ib); |
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130 hash[idw] |= (bits >> rb); |
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131 } |
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132 else |
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133 { |
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134 int new_ib = (ib + bitSize) & 0x1f; |
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135 RI_ASSERT((ib + bitSize == 32) ? new_ib == 0 : true); |
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136 hash[idw] |= (bits << ib); |
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137 } |
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138 return bitPtr + bitSize; |
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139 } |
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140 |
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141 /** |
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142 * \brief Convert an image format to (internal) index. |
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143 */ |
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144 int riVGImageFormatToIndex(VGImageFormat format) |
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145 { |
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146 switch(format) |
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147 { |
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148 /* RGB{A,X} channel ordering */ |
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149 case VG_sRGBX_8888: |
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150 return 0; |
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151 case VG_sRGBA_8888: |
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152 return 1; |
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153 case VG_sRGBA_8888_PRE: |
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154 return 2; |
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155 case VG_sRGB_565: |
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156 return 3; |
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157 case VG_sRGBA_5551: |
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158 return 4; |
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159 case VG_sRGBA_4444: |
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160 return 5; |
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161 case VG_sL_8: |
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162 return 6; |
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163 case VG_lRGBX_8888: |
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164 return 7; |
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165 case VG_lRGBA_8888: |
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166 return 8; |
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167 case VG_lRGBA_8888_PRE: |
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168 return 9; |
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169 case VG_lL_8: |
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170 return 10; |
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171 case VG_A_8: |
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172 return 11; |
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173 case VG_BW_1: |
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174 return 12; |
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175 case VG_A_1: |
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176 return 13; |
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177 case VG_A_4: |
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178 return 14; |
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179 |
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180 /* {A,X}RGB channel ordering */ |
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181 case VG_sXRGB_8888: |
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182 return 15; |
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183 case VG_sARGB_8888: |
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184 return 16; |
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185 case VG_sARGB_8888_PRE: |
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186 return 17; |
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187 case VG_sARGB_1555: |
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188 return 18; |
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189 case VG_sARGB_4444: |
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190 return 19; |
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191 case VG_lXRGB_8888: |
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192 return 20; |
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193 case VG_lARGB_8888: |
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194 return 21; |
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195 case VG_lARGB_8888_PRE: |
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196 return 22; |
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197 |
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198 /* BGR{A,X} channel ordering */ |
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199 case VG_sBGRX_8888: |
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200 return 23; |
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201 case VG_sBGRA_8888: |
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202 return 24; |
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203 case VG_sBGRA_8888_PRE: |
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204 return 25; |
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205 case VG_sBGR_565: |
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206 return 26; |
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207 case VG_sBGRA_5551: |
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208 return 27; |
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209 case VG_sBGRA_4444: |
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210 return 28; |
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211 case VG_lBGRX_8888: |
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212 return 29; |
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213 case VG_lBGRA_8888: |
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214 return 30; |
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215 case VG_lBGRA_8888_PRE: |
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216 return 31; |
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217 |
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218 /* {A,X}BGR channel ordering */ |
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219 case VG_sXBGR_8888: |
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220 return 32; |
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221 case VG_sABGR_8888: |
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222 return 33; |
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223 case VG_sABGR_8888_PRE: |
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224 return 34; |
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225 case VG_sABGR_1555: |
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226 return 35; |
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227 case VG_sABGR_4444: |
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228 return 36; |
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229 case VG_lXBGR_8888: |
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230 return 37; |
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231 case VG_lABGR_8888: |
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232 return 38; |
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233 default: |
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234 RI_ASSERT(format == VG_lABGR_8888_PRE); |
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235 return 39; |
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236 } |
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237 } |
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238 |
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239 } |
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240 |
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