ShuriZma
/
dolphin
mirror of https://github.com/dolphin-emu/dolphin.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

TextureConverter: Use Log2() and shifts instead of multiplications/divisions

This commit is contained in:
degasus 2014-02-24 16:09:20 +01:00
parent 94da4e1aa2
commit bd3beeb184
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Source/Core/VideoCommon/TextureConversionShader.cpp
View File

@ -14,6 +14,7 @@
#include "VideoCommon/TextureConversionShader.h"
#include "VideoCommon/TextureDecoder.h"
#include "VideoCommon/VideoConfig.h"
#include "Common/MathUtil.h"
#define WRITE p+=sprintf
@ -90,22 +91,22 @@ void WriteSwizzler(char*& p, u32 format, API_TYPE ApiType)
" float2 uv0 = float2(0.0, 0.0);\n"
);
WRITE(p, " uv1.x = uv1.x * %d;\n", samples);
WRITE(p, " uv1.x = uv1.x << %d;\n", Log2(samples));
WRITE(p, " int yl = uv1.y / %d;\n", blkH);
WRITE(p, " int yb = yl * %d;\n", blkH);
WRITE(p, " int yl = uv1.y >> %d;\n", Log2(blkH));
WRITE(p, " int yb = yl << %d;\n", Log2(blkH));
WRITE(p, " int yoff = uv1.y - yb;\n");
WRITE(p, " int xp = uv1.x + yoff * position.z;\n");
WRITE(p, " int xel = xp / %d;\n", samples == 1 ? factor : blkW);
WRITE(p, " int xb = xel / %d;\n", blkH);
WRITE(p, " int xoff = xel - xb * %d;\n", blkH);
WRITE(p, " int xl = uv1.x * %d / %d;\n", factor, blkW);
WRITE(p, " int xib = uv1.x * %d - xl * %d;\n", factor, blkW);
WRITE(p, " int halfxb = xb / %d;\n", factor);
WRITE(p, " int xel = xp >> %d;\n", Log2(samples == 1 ? factor : blkW));
WRITE(p, " int xb = xel >> %d;\n", Log2(blkH));
WRITE(p, " int xoff = xel - (xb << %d);\n", Log2(blkH));
WRITE(p, " int xl = (uv1.x << %d) >> %d;\n", Log2(factor), Log2(blkW));
WRITE(p, " int xib = (uv1.x << %d) - (xl << %d);\n", Log2(factor), Log2(blkW));
WRITE(p, " int halfxb = xb >> %d;\n", Log2(factor));
WRITE(p, " sampleUv.x = xib + halfxb * %d;\n", blkW);
WRITE(p, " sampleUv.x = xib + (halfxb << %d);\n", Log2(blkW));
WRITE(p, " sampleUv.y = yb + xoff;\n");
WRITE(p, " bool first = xb == (halfxb * 2);\n");
WRITE(p, " bool first = xb == (halfxb << 1);\n");
}
void WriteSampleColor(char*& p, const char* colorComp, const char* dest, int xoffset, API_TYPE ApiType)