diff options
| author | Andrei Karas <akaras@inbox.ru> | 2012-12-04 16:40:17 +0300 |
|---|---|---|
| committer | Andrei Karas <akaras@inbox.ru> | 2012-12-04 16:40:17 +0300 |
| commit | 3181bc7610b80c360dc59a88b0408099e8ae3bc9 (patch) | |
| tree | 215b6601036a4fe477e1226e2886c4d0f439ead7 /src | |
| parent | 1c66b29979f2a3a9740545b4dbecdb08ea002e92 (diff) | |
| download | mv-3181bc7610b80c360dc59a88b0408099e8ae3bc9.tar.gz mv-3181bc7610b80c360dc59a88b0408099e8ae3bc9.tar.bz2 mv-3181bc7610b80c360dc59a88b0408099e8ae3bc9.tar.xz mv-3181bc7610b80c360dc59a88b0408099e8ae3bc9.zip | |
Possible fix for incorrect colors in fillRectangle function.
Diffstat (limited to 'src')
| -rw-r--r-- | src/graphics.cpp | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/graphics.cpp b/src/graphics.cpp index ec1de72e4..6dc3cede8 100644 --- a/src/graphics.cpp +++ b/src/graphics.cpp @@ -1320,21 +1320,27 @@ void Graphics::fillRectangle(const gcn::Rectangle& rectangle) mOldAlpha = mColor.a; } + const SDL_PixelFormat * const format = mTarget->format; + const unsigned rMask = format->Rmask; + const unsigned gMask = format->Gmask; + const unsigned bMask = format->Bmask; + const unsigned aMask = format->Amask; if (pixel != mOldPixel || mColor.a != mOldAlpha) { - const unsigned pb = (pixel & 0xff) * mColor.a; - const unsigned pg = (pixel & 0xff00) * mColor.a; - const unsigned pr = (pixel & 0xff0000) * mColor.a; - const unsigned a1 = (255 - mColor.a); + const unsigned pb = (pixel & bMask) * mColor.a; + const unsigned pg = (pixel & gMask) * mColor.a; + const unsigned pr = (pixel & rMask) * mColor.a; + const unsigned a0 = (255 - mColor.a); - const unsigned int a2 = a1 * 0xff; - const unsigned int a3 = a1 * 0xff00; + const unsigned int a1 = a0 * bMask / 0xff; + const unsigned int a2 = a0 * gMask / 0xff; + const unsigned int a3 = a0 * rMask / 0xff; for (int f = 0; f <= 0xff; f ++) { - cB[f] = ((pb + f * a1) >> 8) & 0xff; - cG[f] = ((pg + f * a2) >> 8) & 0xff00; - cR[f] = ((pr + f * a3) >> 8) & 0xff0000; + cB[f] = ((pb + f * a1) >> 8) & bMask; + cG[f] = ((pg + f * a2) >> 8) & gMask; + cR[f] = ((pr + f * a3) >> 8) & rMask; } mOldPixel = pixel; @@ -1350,7 +1356,7 @@ void Graphics::fillRectangle(const gcn::Rectangle& rectangle) { uint32_t *const p = p0 + x; const uint32_t dst = *p; - *p = cB[dst & 0xff] | cG[(dst & 0xff00) >> 8] + *p = cB[dst & bMask] | cG[(dst & gMask) >> 8] | cR[(dst & 0xff0000) >> 16]; } } |