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| author | Glenn Kennard <glenn.kennard@gmail.com> | 2005-10-03 19:36:34 +0200 |
|---|---|---|
| committer | Glenn Kennard <glenn.kennard@gmail.com> | 2005-10-03 19:36:34 +0200 |
| commit | 3d58249f61401dc2a2957531fe278a575384fd3c (patch) | |
| tree | 2eb3e5b89a835fed8cdcf14e66e3994a50628399 /raster/imageunpack.c | |
| parent | 2366ad7de028d397fbd6ed4d7a5d5d1b7915b6cf (diff) | |
| download | mupdf-3d58249f61401dc2a2957531fe278a575384fd3c.tar.xz | |
small optimizations
Optimize some common image code paths.
Diffstat (limited to 'raster/imageunpack.c')
| -rw-r--r-- | raster/imageunpack.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/raster/imageunpack.c b/raster/imageunpack.c index b650b0f2..a3642d3d 100644 --- a/raster/imageunpack.c +++ b/raster/imageunpack.c @@ -13,7 +13,7 @@ static void decodetile(fz_pixmap *pix, int skip, float *decode) int min[FZ_MAXCOLORS]; int max[FZ_MAXCOLORS]; int sub[FZ_MAXCOLORS]; - int useless = 1; + int needed = 0; byte *p = pix->samples; int n = pix->n; int wh = pix->w * pix->h; @@ -28,11 +28,10 @@ static void decodetile(fz_pixmap *pix, int skip, float *decode) min[i] = decode[(i - skip) * 2] * 255; max[i] = decode[(i - skip) * 2 + 1] * 255; sub[i] = max[i] - min[i]; - if (min[i] != 0 || max[i] != 255) - useless = 0; + needed |= (min[i] != 0) | (max[i] != 255); } - if (useless) + if (!needed) return; while (wh--) @@ -170,11 +169,11 @@ static void loadtile1(byte *src, int sw, byte *dst, int dw, int w, int h, int pa } \ } -static void loadtile2(byte *src, int sw, byte *dst, int dw, int w, int h, int pad) +static void loadtile2(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) TILE(ttwo) -static void loadtile4(byte *src, int sw, byte *dst, int dw, int w, int h, int pad) +static void loadtile4(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) TILE(tnib) -static void loadtile8(byte *src, int sw, byte *dst, int dw, int w, int h, int pad) +static void loadtile8(byte * restrict src, int sw, byte * restrict dst, int dw, int w, int h, int pad) TILE(toct) void (*fz_decodetile)(fz_pixmap *pix, int skip, float *decode) = decodetile; |