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fix FASTOCTREE quantizer for large images (>16MP)

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the color value counter sums all color values and this overflows
a uint32 at 16M white pixels, 32M gray pixels, etc.
This commit is contained in:
Oliver Tonnhofer 2013-09-26 10:15:42 +02:00
parent dea45dafcb
commit 147a0204eb
1 changed files with 5 additions and 5 deletions
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10
libImaging/QuantOctree.c
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@ -32,10 +32,10 @@
typedef struct _ColorBucket{ typedef struct _ColorBucket{
/* contains palette index when used for look up cube */ /* contains palette index when used for look up cube */
uint32_t count; uint32_t count;
uint32_t r; uint64_t r;
uint32_t g; uint64_t g;
uint32_t b; uint64_t b;
uint32_t a; uint64_t a;
} *ColorBucket; } *ColorBucket;
typedef struct _ColorCube{ typedef struct _ColorCube{
@ -262,7 +262,7 @@ set_lookup_value(const ColorCube cube, const Pixel *p, long value) {
bucket->count = value; bucket->count = value;
} }
uint32_t uint64_t
lookup_color(const ColorCube cube, const Pixel *p) { lookup_color(const ColorCube cube, const Pixel *p) {
ColorBucket bucket = color_bucket_from_cube(cube, p); ColorBucket bucket = color_bucket_from_cube(cube, p);
return bucket->count; return bucket->count;