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GRAPHICS: Refactor crossBlit logic into a template.

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This commit is contained in:
Johannes Schickel 2012-07-14 04:53:10 +02:00
parent 05d24e892c
commit ea1bcaad33
1 changed files with 29 additions and 33 deletions
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62
graphics/conversion.cpp
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@ -26,6 +26,29 @@ namespace Graphics {
// TODO: YUV to RGB conversion function
namespace {
template<typename SrcColor, typename DstColor>
FORCEINLINE void crossBlitLogic(byte *dst, const byte *src, const uint w, const uint h,
const PixelFormat &srcFmt, const PixelFormat &dstFmt,
const uint srcDelta, const uint dstDelta) {
for (uint y = 0; y < h; ++y) {
for (uint x = 0; x < w; ++x) {
uint32 color = *(const SrcColor *)src;
byte a, r, g, b;
srcFmt.colorToARGB(color, a, r, g, b);
color = dstFmt.ARGBToColor(a, r, g, b);
*(DstColor *)dst = color;
src += sizeof(SrcColor);
dst += sizeof(DstColor);
}
src += srcDelta;
dst += dstDelta;
}
}
} // End of anonymous namespace
// Function to blit a rect from one color format to another
bool crossBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
@ -59,21 +82,11 @@ bool crossBlit(byte *dst, const byte *src,
const uint dstDelta = (dstPitch - w * dstFmt.bytesPerPixel);
// TODO: optimized cases for dstDelta of 0
uint8 r, g, b, a;
if (dstFmt.bytesPerPixel == 2) {
uint16 color;
for (uint y = 0; y < h; ++y) {
for (uint x = 0; x < w; ++x, src += 2, dst += 2) {
color = *(const uint16 *)src;
srcFmt.colorToARGB(color, a, r, g, b);
color = dstFmt.ARGBToColor(a, r, g, b);
*(uint16 *)dst = color;
}
src += srcDelta;
dst += dstDelta;
}
crossBlitLogic<uint16, uint16>(dst, src, w, h, srcFmt, dstFmt, srcDelta, dstDelta);
} else if (dstFmt.bytesPerPixel == 3) {
uint32 color;
uint8 r, g, b, a;
uint8 *col = (uint8 *) &color;
#ifdef SCUMM_BIG_ENDIAN
col++;
@ -102,19 +115,11 @@ bool crossBlit(byte *dst, const byte *src,
}
}
} else if (dstFmt.bytesPerPixel == 4) {
uint32 color;
if (srcFmt.bytesPerPixel == 2) {
for (uint y = 0; y < h; ++y) {
for (uint x = 0; x < w; ++x, src += 2, dst += 4) {
color = *(const uint16 *)src;
srcFmt.colorToARGB(color, a, r, g, b);
color = dstFmt.ARGBToColor(a, r, g, b);
*(uint32 *)dst = color;
}
src += srcDelta;
dst += dstDelta;
}
crossBlitLogic<uint16, uint32>(dst, src, w, h, srcFmt, dstFmt, srcDelta, dstDelta);
} else if (srcFmt.bytesPerPixel == 3) {
uint32 color;
byte r, g, b, a;
uint8 *col = (uint8 *)&color;
#ifdef SCUMM_BIG_ENDIAN
col++;
@ -130,16 +135,7 @@ bool crossBlit(byte *dst, const byte *src,
dst += dstDelta;
}
} else {
for (uint y = 0; y < h; ++y) {
for (uint x = 0; x < w; ++x, src += 4, dst += 4) {
color = *(const uint32 *)src;
srcFmt.colorToARGB(color, a, r, g, b);
color = dstFmt.ARGBToColor(a, r, g, b);
*(uint32 *)dst = color;
}
src += srcDelta;
dst += dstDelta;
}
crossBlitLogic<uint32, uint32>(dst, src, w, h, srcFmt, dstFmt, srcDelta, dstDelta);
}
} else {
return false;