Index: src/core/SkBitmapFilter.h |
diff --git a/src/core/SkBitmapFilter.h b/src/core/SkBitmapFilter.h |
index ca3e0930f27570ebff359e95370a81f59d189f5c..6fa8edde3460ab3992cc14f0e90c216f83665436 100644 |
--- a/src/core/SkBitmapFilter.h |
+++ b/src/core/SkBitmapFilter.h |
@@ -27,6 +27,15 @@ |
fLookupMultiplier = this->invWidth() * (SKBITMAP_FILTER_TABLE_SIZE-1); |
} |
virtual ~SkBitmapFilter() {} |
+ |
+ SkFixed lookup(float x) const { |
+ if (!fPrecomputed) { |
+ precomputeTable(); |
+ } |
+ int filter_idx = int(sk_float_abs(x * fLookupMultiplier)); |
+ SkASSERT(filter_idx < SKBITMAP_FILTER_TABLE_SIZE); |
+ return fFilterTable[filter_idx]; |
+ } |
SkScalar lookupScalar(float x) const { |
if (!fPrecomputed) { |
@@ -58,16 +67,19 @@ |
float fLookupMultiplier; |
mutable bool fPrecomputed; |
+ mutable SkFixed fFilterTable[SKBITMAP_FILTER_TABLE_SIZE]; |
mutable SkScalar fFilterTableScalar[SKBITMAP_FILTER_TABLE_SIZE]; |
private: |
void precomputeTable() const { |
fPrecomputed = true; |
+ SkFixed *ftp = fFilterTable; |
SkScalar *ftpScalar = fFilterTableScalar; |
for (int x = 0; x < SKBITMAP_FILTER_TABLE_SIZE; ++x) { |
float fx = ((float)x + .5f) * this->width() / SKBITMAP_FILTER_TABLE_SIZE; |
float filter_value = evaluate(fx); |
*ftpScalar++ = filter_value; |
+ *ftp++ = SkFloatToFixed(filter_value); |
} |
} |
}; |