diff options
| -rw-r--r-- | backends/platform/ds/arm9/source/blitters.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/backends/platform/ds/arm9/source/blitters.cpp b/backends/platform/ds/arm9/source/blitters.cpp index 7d1e0e4402..b2623fda0c 100644 --- a/backends/platform/ds/arm9/source/blitters.cpp +++ b/backends/platform/ds/arm9/source/blitters.cpp @@ -19,8 +19,11 @@ */ #include "stdafx.h" +#include "blitters.h" #define CHARSET_MASK_TRANSPARENCY 253 +#define PERFECT_5_TO_4_RESCALING + namespace DS { void asmDrawStripToScreen(int height, int width, byte const* text, byte const* src, byte* dst, @@ -149,6 +152,7 @@ void ComputeDivBy5TableIFN() } } +#ifdef PERFECT_5_TO_4_RESCALING static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3, u16 s4, u16* dest) { @@ -223,6 +227,44 @@ static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3 ((u32*)dest)[0] = d10; ((u32*)dest)[1] = d32; } +#else +static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3, u16 s4, + u16* dest) +{ + u32 ar0bs0 = s0 & 0xFC1F; + u32 ar0bs1 = s1 & 0xFC1F; + u32 ar0bs2 = s2 & 0xFC1F; + u32 ar0bs3 = s3 & 0xFC1F; + u32 ar0bs4 = s4 & 0xFC1F; + + u32 gs0 = s0 & 0x03E0; + u32 gs1 = s1 & 0x03E0; + u32 gs2 = s2 & 0x03E0; + u32 gs3 = s3 & 0x03E0; + u32 gs4 = s4 & 0x03E0; + + u32 ar0bd0 = (3*ar0bs0 + ar0bs1) >> 2; + u32 ar0bd1 = ( ar0bs1 + ar0bs2) >> 1; + u32 ar0bd2 = ( ar0bs2 + ar0bs3) >> 1; + u32 ar0bd3 = ( ar0bs3 + 3*ar0bs4) >> 2; + + u32 gd0 = (3*gs0 + gs1) >> 2; + u32 gd1 = ( gs1 + gs2) >> 1; + u32 gd2 = ( gs2 + gs3) >> 1; + u32 gd3 = ( gs3 + 3*gs4) >> 2; + + u32 d0 = ar0bd0 | gd0; + u32 d1 = ar0bd1 | gd1; + u32 d2 = ar0bd2 | gd2; + u32 d3 = ar0bd3 | gd3; + + u32 d10 = (d1 << 16) | d0; + u32 d32 = (d3 << 16) | d2; + + ((u32*)dest)[0] = d10; + ((u32*)dest)[1] = d32; +} +#endif static inline void RescaleBlock_5x8888_To_4x1555( u32 s0, u32 s1, u32 s2, u32 s3, u32 s4, u16* dest) @@ -262,6 +304,7 @@ static inline void RescaleBlock_5x8888_To_4x1555( u32 s0, u32 s1, u32 s2, u32 s3 } // Can't work in place +#ifdef PERFECT_5_TO_4_RESCALING static inline void Rescale_320xPAL8Scanline_To_256x1555Scanline(u16* dest, const u8* src, const u32* palette) { ComputeDivBy5TableIFN(); @@ -277,6 +320,21 @@ static inline void Rescale_320xPAL8Scanline_To_256x1555Scanline(u16* dest, const RescaleBlock_5x8888_To_4x1555(s0, s1, s2, s3, s4, dest+4*i); } } +#else +static inline void Rescale_320xPAL8Scanline_To_256x1555Scanline(u16* dest, const u8* src, const u16* palette) +{ + for(size_t i=0; i<64; ++i) + { + u16 s0 = palette[src[5*i+0]]; + u16 s1 = palette[src[5*i+1]]; + u16 s2 = palette[src[5*i+2]]; + u16 s3 = palette[src[5*i+3]]; + u16 s4 = palette[src[5*i+4]]; + + RescaleBlock_5x1555_To_4x1555(s0, s1, s2, s3, s4, dest+4*i); + } +} +#endif // Can work in place, because it's a contraction @@ -296,6 +354,7 @@ static inline void Rescale_320x1555Scanline_To_256x1555Scanline(u16* dest, const } } +#ifdef PERFECT_5_TO_4_RESCALING void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* palette, int destStride, int srcStride) { u32 fastRam[768]; @@ -316,6 +375,18 @@ void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* p Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, fastRam); } } +#else +void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* palette, int destStride, int srcStride) +{ + u16 fastRam[256]; + memcpy(fastRam, palette, 256*2); + + for(size_t i=0; i<200; ++i) + { + Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, fastRam); + } +} +#endif void Rescale_320x256x1555_To_256x256x1555(u16* dest, const u16* src, int destStride, int srcStride) { |