diff options
| -rw-r--r-- | backends/platform/ds/arm9/source/blitters.cpp | 51 |
1 files changed, 19 insertions, 32 deletions
diff --git a/backends/platform/ds/arm9/source/blitters.cpp b/backends/platform/ds/arm9/source/blitters.cpp index 04f0742b35..767cdb624c 100644 --- a/backends/platform/ds/arm9/source/blitters.cpp +++ b/backends/platform/ds/arm9/source/blitters.cpp @@ -228,39 +228,26 @@ static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3 static inline void RescaleBlock_5x8888_To_4x1555( u32 s0, u32 s1, u32 s2, u32 s3, u32 s4, u16* dest) { - u32 bs0 = s0 & 0xFF; - u32 bs1 = s1 & 0xFF; - u32 bs2 = s2 & 0xFF; - u32 bs3 = s3 & 0xFF; - u32 bs4 = s4 & 0xFF; - - u32 gs0 = (s0 >> 8) & 0xFF; - u32 gs1 = (s1 >> 8) & 0xFF; - u32 gs2 = (s2 >> 8) & 0xFF; - u32 gs3 = (s3 >> 8) & 0xFF; - u32 gs4 = (s4 >> 8) & 0xFF; - - u32 rs0 = (s0 >> 16) & 0xFF; - u32 rs1 = (s1 >> 16) & 0xFF; - u32 rs2 = (s2 >> 16) & 0xFF; - u32 rs3 = (s3 >> 16) & 0xFF; - u32 rs4 = (s4 >> 16) & 0xFF; - - u32 rd0 = 4*rs0 + rs1; - u32 rd1 = 2*rs1 + rs1 + 2*rs2; - u32 rd2 = 2*rs2 + 2*rs3 + rs3; - u32 rd3 = rs3 + 4*rs4; - - u32 gd0 = 4*gs0 + gs1; - u32 gd1 = 2*gs1 + gs1 + 2*gs2; - u32 gd2 = 2*gs2 + 2*gs3 + gs3; - u32 gd3 = gs3 + 4*gs4; - - u32 bd0 = 4*bs0 + bs1; - u32 bd1 = 2*bs1 + bs1 + 2*bs2; - u32 bd2 = 2*bs2 + 2*bs3 + bs3; - u32 bd3 = bs3 + 4*bs4; + u32 d0 = 4*s0 + s1; + u32 d1 = 2*s1 + s1 + 2*s2; + u32 d2 = 2*s2 + 2*s3 + s3; + u32 d3 = s3 + 4*s4; + + u32 bd0 = d0 & 0xFF; + u32 bd1 = d1 & 0xFF; + u32 bd2 = d2 & 0xFF; + u32 bd3 = d3 & 0xFF; + + u32 gd0 = (d0 >> 8) & 0xFF; + u32 gd1 = (d1 >> 8) & 0xFF; + u32 gd2 = (d2 >> 8) & 0xFF; + u32 gd3 = (d3 >> 8) & 0xFF; + u32 rd0 = (d0 >> 16); + u32 rd1 = (d1 >> 16); + u32 rd2 = (d2 >> 16); + u32 rd3 = (d3 >> 16); + #if 0 // Offsetting for correct rounding rd0 = rd0*2+5; rd1 = rd1*2+5; rd2 = rd2*2+5; rd3 = rd3*2+5; |