AuroraMiddleware/skia2
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Optimize some alpha blending modes.

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- Inline the component calculation helpers.
- Reorder the computation in plus_modeproc.

This doubles the performance of plus_modeproc.

Review URL: http://codereview.appspot.com/88084


git-svn-id: http://skia.googlecode.com/svn/trunk@250 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
deanm@chromium.org 2009-07-03 12:54:24 +00:00
parent 8433b5db1a
commit da94699149
1 changed files with 7 additions and 7 deletions
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14
src/core/SkXfermode.cpp
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@ -45,7 +45,7 @@ static U8CPU mulmuldiv255round(U8CPU a, U8CPU b, U8CPU c, U8CPU d) {
}
#endif
static unsigned saturated_add(unsigned a, unsigned b) {
static inline unsigned saturated_add(unsigned a, unsigned b) {
SkASSERT(a <= 255);
SkASSERT(b <= 255);
unsigned sum = a + b;
@ -55,7 +55,7 @@ static unsigned saturated_add(unsigned a, unsigned b) {
return sum;
}
static int clamp_signed_byte(int n) {
static inline int clamp_signed_byte(int n) {
if (n < 0) {
n = 0;
} else if (n > 255) {
@ -64,7 +64,7 @@ static int clamp_signed_byte(int n) {
return n;
}
static int clamp_div255round(int prod) {
static inline int clamp_div255round(int prod) {
if (prod <= 0) {
return 0;
} else if (prod >= 255*255) {
@ -74,7 +74,7 @@ static int clamp_div255round(int prod) {
}
}
static int clamp_max(int value, int max) {
static inline int clamp_max(int value, int max) {
if (value > max) {
value = max;
}
@ -470,10 +470,10 @@ static SkPMColor xor_modeproc(SkPMColor src, SkPMColor dst) {
// kPlus_Mode
static SkPMColor plus_modeproc(SkPMColor src, SkPMColor dst) {
unsigned a = saturated_add(SkGetPackedA32(src), SkGetPackedA32(dst));
unsigned r = saturated_add(SkGetPackedR32(src), SkGetPackedR32(dst));
unsigned g = saturated_add(SkGetPackedG32(src), SkGetPackedG32(dst));
unsigned b = saturated_add(SkGetPackedB32(src), SkGetPackedB32(dst));
unsigned g = saturated_add(SkGetPackedG32(src), SkGetPackedG32(dst));
unsigned r = saturated_add(SkGetPackedR32(src), SkGetPackedR32(dst));
unsigned a = saturated_add(SkGetPackedA32(src), SkGetPackedA32(dst));
return SkPackARGB32(a, r, g, b);
}