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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 244 | chris | 1 | { |
| 2 | if (mNoLock) |
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| 3 | return; |
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| 4 | |||
| 5 | // Special path that avoids generating cached native alpha data |
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| 6 | |||
| 7 | LPDIRECTDRAWSURFACE aSurface = GetSurface(); |
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| 8 | |||
| 9 | if (!LockSurface()) |
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| 10 | return; |
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| 11 | |||
| 12 | if (mLockedSurfaceDesc.ddpfPixelFormat.dwRGBBitCount == 16) |
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| 13 | { |
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| 14 | ushort* aDestPixelsRow = ((ushort*) mLockedSurfaceDesc.lpSurface) + (theY * mLockedSurfaceDesc.lPitch/2) + theX; |
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| 15 | SRC_TYPE* aSrcPixelsRow = aSrcBits + |
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| 16 | (theSrcRect.mY * theImage->mWidth) + theSrcRect.mX; |
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| 17 | |||
| 18 | ulong aRMask = mLockedSurfaceDesc.ddpfPixelFormat.dwRBitMask; |
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| 19 | ulong aGMask = mLockedSurfaceDesc.ddpfPixelFormat.dwGBitMask; |
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| 20 | ulong aBMask = mLockedSurfaceDesc.ddpfPixelFormat.dwBBitMask; |
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| 21 | |||
| 22 | ulong aRRoundAdd = aRMask >> 1; |
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| 23 | ulong aGRoundAdd = aGMask >> 1; |
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| 24 | ulong aBRoundAdd = aBMask >> 1; |
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| 25 | |||
| 26 | #ifdef OPTIMIZE_SOFTWARE_DRAWING |
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| 27 | bool performNormalBlit = true; |
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| 28 | if (gOptimizeSoftwareDrawing) // we know the ordering of the bit masks. |
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| 29 | { |
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| 30 | if (aGMask == 0x7E0) |
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| 31 | { |
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| 32 | performNormalBlit = false; |
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| 33 | for (int y = 0; y < theSrcRect.mHeight; y++) |
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| 34 | { |
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| 35 | ushort* aDestPixels = aDestPixelsRow; |
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| 36 | SRC_TYPE* aSrcPixels = aSrcPixelsRow; |
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| 37 | |||
| 38 | for (int x = 0; x < theSrcRect.mWidth; x++) |
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| 39 | { |
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| 40 | ulong src = NEXT_SRC_COLOR; |
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| 41 | ulong dest = *aDestPixels; |
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| 42 | |||
| 43 | int a = src >> 27; |
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| 44 | //int oma = 256 - a; |
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| 45 | |||
| 46 | src = ((src & 0xFC00) << 11) + ((src >> 8) & 0xF800) + ((src >> 3) & 0x1F); |
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| 47 | dest = (dest | (dest << 16)) & 0x7E0F81F; |
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| 48 | dest += ((src - dest) * a) >> 5; |
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| 49 | dest &= 0x7E0F81F; |
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| 50 | *(aDestPixels++) = dest | (dest >> 16); |
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| 51 | //(((((dest & aBMask) * oma) + (((src & 0x000000FF) * a * aBMask) >> 8) + aBRoundAdd) >> 8) & aBMask) + |
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| 52 | //(((((dest & aGMask) * oma) + ((((src & 0x0000FF00) >> 8) * a * aGMask) >> 8) + aGRoundAdd) >> 8) & aGMask) + |
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| 53 | //(((((dest & aRMask) * oma) + ((((src & 0x00FF0000) >> 16) * a * aRMask) >> 8) + aRRoundAdd) >> 8) & aRMask); |
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| 54 | } |
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| 55 | |||
| 56 | aDestPixelsRow += mLockedSurfaceDesc.lPitch/2; |
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| 57 | aSrcPixelsRow += theImage->mWidth; |
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| 58 | } |
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| 59 | } |
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| 60 | else if (aGMask == 0x3E0) |
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| 61 | { |
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| 62 | performNormalBlit = false; |
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| 63 | for (int y = 0; y < theSrcRect.mHeight; y++) |
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| 64 | { |
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| 65 | ushort* aDestPixels = aDestPixelsRow; |
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| 66 | SRC_TYPE* aSrcPixels = aSrcPixelsRow; |
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| 67 | |||
| 68 | for (int x = 0; x < theSrcRect.mWidth; x++) |
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| 69 | { |
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| 70 | ulong src = NEXT_SRC_COLOR; |
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| 71 | ulong dest = *aDestPixels; |
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| 72 | |||
| 73 | int a = src >> 27; |
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| 74 | //int oma = 256 - a; |
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| 75 | |||
| 76 | src = ((src & 0xF800) << 10) + ((src >> 9) & 0x7C00) + ((src >> 3) & 0x1F); |
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| 77 | dest = (dest | (dest << 16)) & 0x3E07C1F; |
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| 78 | dest += ((src - dest) * a) >> 5; // 1*d - a*d = (1-a)*d = oma*d :) |
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| 79 | dest &= 0x3E07C1F; |
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| 80 | *(aDestPixels++) = dest | (dest >> 16); |
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| 81 | //(((((dest & aBMask) * oma) + (((src & 0x000000FF) * a * aBMask) >> 8) + aBRoundAdd) >> 8) & aBMask) + |
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| 82 | //(((((dest & aGMask) * oma) + ((((src & 0x0000FF00) >> 8) * a * aGMask) >> 8) + aGRoundAdd) >> 8) & aGMask) + |
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| 83 | //(((((dest & aRMask) * oma) + ((((src & 0x00FF0000) >> 16) * a * aRMask) >> 8) + aRRoundAdd) >> 8) & aRMask); |
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| 84 | } |
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| 85 | |||
| 86 | |||
| 87 | aDestPixelsRow += mLockedSurfaceDesc.lPitch/2; |
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| 88 | aSrcPixelsRow += theImage->mWidth; |
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| 89 | } |
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| 90 | } |
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| 91 | } |
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| 92 | if (performNormalBlit) |
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| 93 | #endif |
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| 94 | { |
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| 95 | for (int y = 0; y < theSrcRect.mHeight; y++) |
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| 96 | { |
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| 97 | ushort* aDestPixels = aDestPixelsRow; |
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| 98 | SRC_TYPE* aSrcPixels = aSrcPixelsRow; |
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| 99 | |||
| 100 | for (int x = 0; x < theSrcRect.mWidth; x++) |
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| 101 | { |
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| 102 | ulong src = NEXT_SRC_COLOR; |
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| 103 | ulong dest = *aDestPixels; |
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| 104 | |||
| 105 | int a = src >> 24; |
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| 106 | int oma = 256 - a; |
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| 107 | |||
| 108 | *(aDestPixels++) = |
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| 109 | (((((dest & aBMask) * oma) + (((src & 0x000000FF) * a * aBMask) >> 8) + aBRoundAdd) >> 8) & aBMask) + |
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| 110 | (((((dest & aGMask) * oma) + ((((src & 0x0000FF00) >> 8) * a * aGMask) >> 8) + aGRoundAdd) >> 8) & aGMask) + |
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| 111 | (((((dest & aRMask) * oma) + ((((src & 0x00FF0000) >> 16) * a * aRMask) >> 8) + aRRoundAdd) >> 8) & aRMask); |
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| 112 | } |
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| 113 | |||
| 114 | aDestPixelsRow += mLockedSurfaceDesc.lPitch/2; |
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| 115 | aSrcPixelsRow += theImage->mWidth; |
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| 116 | } |
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| 117 | } |
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| 118 | } |
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| 119 | else if (mLockedSurfaceDesc.ddpfPixelFormat.dwRGBBitCount == 32) |
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| 120 | { |
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| 121 | ulong* aDestPixelsRow = ((ulong*) mLockedSurfaceDesc.lpSurface) + (theY * mLockedSurfaceDesc.lPitch/4) + theX; |
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| 122 | SRC_TYPE* aSrcPixelsRow = aSrcBits + |
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| 123 | (theSrcRect.mY * theImage->mWidth) + theSrcRect.mX; |
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| 124 | |||
| 125 | ulong aRMask = mLockedSurfaceDesc.ddpfPixelFormat.dwRBitMask; |
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| 126 | ulong aGMask = mLockedSurfaceDesc.ddpfPixelFormat.dwGBitMask; |
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| 127 | ulong aBMask = mLockedSurfaceDesc.ddpfPixelFormat.dwBBitMask; |
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| 128 | |||
| 129 | ulong aRRoundAdd = aRMask >> 1; |
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| 130 | ulong aGRoundAdd = aGMask >> 1; |
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| 131 | ulong aBRoundAdd = aBMask >> 1; |
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| 132 | |||
| 133 | #ifdef OPTIMIZE_SOFTWARE_DRAWING |
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| 134 | if (gOptimizeSoftwareDrawing) |
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| 135 | { |
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| 136 | for (int y = 0; y < theSrcRect.mHeight; y++) |
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| 137 | { |
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| 138 | ulong* aDestPixels = aDestPixelsRow; |
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| 139 | SRC_TYPE* aSrcPixels = aSrcPixelsRow; |
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| 140 | |||
| 141 | for (int x = 0; x < theSrcRect.mWidth; x++) |
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| 142 | { |
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| 143 | ulong src = NEXT_SRC_COLOR; |
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| 144 | ulong dest = *aDestPixels; |
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| 145 | |||
| 146 | int a = src >> 24; |
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| 147 | //int oma = 256 - a; |
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| 148 | ulong srctmp = src & 0xFF00FF; |
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| 149 | ulong desttmp = dest & 0xFF00FF; |
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| 150 | desttmp = (desttmp + (((srctmp - desttmp) * a) >> 8)) & 0xFF00FF; |
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| 151 | src &= 0x00FF00; |
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| 152 | dest &= 0x00FF00; |
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| 153 | dest = (dest + (((src - dest) * a) >> 8)) & 0x00FF00; |
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| 154 | |||
| 155 | *(aDestPixels++) = dest | desttmp; |
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| 156 | //(((((dest & aBMask) * oma) + ((((src & 0x000000FF) * a) >> 8) * aBMask) + aBRoundAdd) >> 8) & aBMask) + |
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| 157 | //(((((dest & aGMask) * oma) + (((((src & 0x0000FF00) >> 8) * a) >> 8) * aGMask) + aGRoundAdd) >> 8) & aGMask) + |
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| 158 | //(((((dest & aRMask) * oma) + (((((src & 0x00FF0000) >> 16) * a) >> 8) * aRMask) + aRRoundAdd) >> 8) & aRMask); |
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| 159 | } |
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| 160 | |||
| 161 | aDestPixelsRow += mLockedSurfaceDesc.lPitch/4; |
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| 162 | aSrcPixelsRow += theImage->mWidth; |
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| 163 | } |
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| 164 | } |
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| 165 | else |
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| 166 | #endif |
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| 167 | { |
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| 168 | for (int y = 0; y < theSrcRect.mHeight; y++) |
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| 169 | { |
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| 170 | ulong* aDestPixels = aDestPixelsRow; |
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| 171 | SRC_TYPE* aSrcPixels = aSrcPixelsRow; |
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| 172 | |||
| 173 | for (int x = 0; x < theSrcRect.mWidth; x++) |
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| 174 | { |
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| 175 | ulong src = NEXT_SRC_COLOR; |
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| 176 | ulong dest = *aDestPixels; |
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| 177 | |||
| 178 | int a = src >> 24; |
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| 179 | int oma = 256 - a; |
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| 180 | |||
| 181 | *(aDestPixels++) = |
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| 182 | (((((dest & aBMask) * oma) + ((((src & 0x000000FF) * a) >> 8) * aBMask) + aBRoundAdd) >> 8) & aBMask) + |
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| 183 | (((((dest & aGMask) * oma) + (((((src & 0x0000FF00) >> 8) * a) >> 8) * aGMask) + aGRoundAdd) >> 8) & aGMask) + |
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| 184 | (((((dest & aRMask) * oma) + (((((src & 0x00FF0000) >> 16) * a) >> 8) * aRMask) + aRRoundAdd) >> 8) & aRMask); |
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| 185 | } |
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| 186 | |||
| 187 | aDestPixelsRow += mLockedSurfaceDesc.lPitch/4; |
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| 188 | aSrcPixelsRow += theImage->mWidth; |
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| 189 | } |
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| 190 | } |
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| 191 | } |
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| 192 | |||
| 193 | UnlockSurface(); |
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| 194 | } |