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Fix texture upscaling on big-endian systems.

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rogerman
2025-07-12 20:25:09 -07:00
parent b962b925f5
commit 63114d0aa2
1 changed files with 26 additions and 4 deletions
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30
desmume/src/filter/xbrz.cpp
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@@ -16,6 +16,7 @@
// * do so, delete this exception statement from your version. *
// ****************************************************************************
// 2025-07-12 (rogerman): Add support for big-endian byte order.
// 2024-08-01 (rogerman): Small performance optimization to
// ColorDistanceARGB::dist(). (Special thanks to m42a
// for this.)
@@ -41,16 +42,32 @@
#define FORCE_INLINE inline
#endif
#define COLOR_MASK_A 0xFF000000
#define COLOR_MASK_R 0x00FF0000
#define COLOR_MASK_G 0x0000FF00
#define COLOR_MASK_B 0x000000FF
#if defined(MSB_FIRST)
#define COLOR_MASK_A 0x000000FF
#define COLOR_MASK_R 0x0000FF00
#define COLOR_MASK_G 0x00FF0000
#define COLOR_MASK_B 0xFF000000
#else
#define COLOR_MASK_A 0xFF000000
#define COLOR_MASK_R 0x00FF0000
#define COLOR_MASK_G 0x0000FF00
#define COLOR_MASK_B 0x000000FF
#endif
namespace
{
template <uint32_t N> inline
unsigned char getByte(uint32_t val) { return static_cast<unsigned char>((val >> (8 * N)) & 0xff); }
#if defined(MSB_FIRST)
inline unsigned char getAlpha(uint32_t pix) { return getByte<0>(pix); }
inline unsigned char getRed (uint32_t pix) { return getByte<1>(pix); }
inline unsigned char getGreen(uint32_t pix) { return getByte<2>(pix); }
inline unsigned char getBlue (uint32_t pix) { return getByte<3>(pix); }
inline uint32_t makePixel( unsigned char r, unsigned char g, unsigned char b) { return (b << 24) | (g << 16) | (r << 8) ; }
inline uint32_t makePixel(unsigned char a, unsigned char r, unsigned char g, unsigned char b) { return (b << 24) | (g << 16) | (r << 8) | a; }
#else
inline unsigned char getAlpha(uint32_t pix) { return getByte<3>(pix); }
inline unsigned char getRed (uint32_t pix) { return getByte<2>(pix); }
inline unsigned char getGreen(uint32_t pix) { return getByte<1>(pix); }
@@ -58,6 +75,7 @@ inline unsigned char getBlue (uint32_t pix) { return getByte<0>(pix); }
inline uint32_t makePixel( unsigned char r, unsigned char g, unsigned char b) { return (r << 16) | (g << 8) | b; }
inline uint32_t makePixel(unsigned char a, unsigned char r, unsigned char g, unsigned char b) { return (a << 24) | (r << 16) | (g << 8) | b; }
#endif
template <unsigned int M, unsigned int N> FORCE_INLINE
unsigned char gradientRGB_calcColor(unsigned char colFront, unsigned char colBack)
@@ -116,7 +134,11 @@ uint32_t gradientARGB_1bitAlpha(uint32_t pixFront, uint32_t pixBack) //special b
if (weightSum == 0)
{
#if defined(MSB_FIRST)
return (pixFront & 0xFFFFFF00);
#else
return (pixFront & 0x00FFFFFF);
#endif
}
else if (weightFront == 0)
{