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Set up some hooks for premul/swizzzle opts.

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You can call these as SkOpts::premul_xxxa, SkOpts::swaprb_xxxa, etc.

  For now, I just backed the function pointers with some (untested) portable
  code, which may autovectorize.  We can override with optimized versions in
  Init_ssse3() (in SkOpts_ssse3.cpp), Init_neon() (SkOpts_neon.cpp), etc.

BUG=skia:4767
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1569013002

Review URL: https://codereview.chromium.org/1569013002
This commit is contained in:
mtklein 2016-01-07 13:48:21 -08:00 committed by Commit bot
parent e9709e8319
commit a1bfaad004
2 changed files with 61 additions and 0 deletions
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56
src/core/SkOpts.cpp
View File

@ -49,6 +49,58 @@
#include <cpu-features.h>
#endif
namespace sk_default {
// These variable names in these functions just pretend the input is BGRA.
// They work fine with both RGBA and BGRA.
static void premul_xxxa(uint32_t dst[], const uint32_t src[], int count) {
for (int i = 0; i < count; i++) {
uint8_t a = src[i] >> 24,
r = src[i] >> 16,
g = src[i] >> 8,
b = src[i] >> 0;
r = (r*a+127)/255;
g = (g*a+127)/255;
b = (b*a+127)/255;
dst[i] = (uint32_t)a << 24
| (uint32_t)r << 16
| (uint32_t)g << 8
| (uint32_t)b << 0;
}
}
static void swaprb_xxxa(uint32_t dst[], const uint32_t src[], int count) {
for (int i = 0; i < count; i++) {
uint8_t a = src[i] >> 24,
r = src[i] >> 16,
g = src[i] >> 8,
b = src[i] >> 0;
dst[i] = (uint32_t)a << 24
| (uint32_t)b << 16
| (uint32_t)g << 8
| (uint32_t)r << 0;
}
}
static void premul_swaprb_xxxa(uint32_t dst[], const uint32_t src[], int count) {
for (int i = 0; i < count; i++) {
uint8_t a = src[i] >> 24,
r = src[i] >> 16,
g = src[i] >> 8,
b = src[i] >> 0;
r = (r*a+127)/255;
g = (g*a+127)/255;
b = (b*a+127)/255;
dst[i] = (uint32_t)a << 24
| (uint32_t)b << 16
| (uint32_t)g << 8
| (uint32_t)r << 0;
}
}
} // namespace sk_default
namespace SkOpts {
// Define default function pointer values here...
// If our global compile options are set high enough, these defaults might even be
@ -80,6 +132,10 @@ namespace SkOpts {
decltype(matrix_scale_translate) matrix_scale_translate = sk_default::matrix_scale_translate;
decltype(matrix_affine) matrix_affine = sk_default::matrix_affine;
decltype( premul_xxxa) premul_xxxa = sk_default:: premul_xxxa;
decltype( swaprb_xxxa) swaprb_xxxa = sk_default:: swaprb_xxxa;
decltype(premul_swaprb_xxxa) premul_swaprb_xxxa = sk_default::premul_swaprb_xxxa;
// Each Init_foo() is defined in src/opts/SkOpts_foo.cpp.
void Init_ssse3();
void Init_sse41();

5
src/core/SkOpts.h
View File

@ -57,6 +57,11 @@ namespace SkOpts {
const SkColor*);
extern SkMatrix::MapPtsProc matrix_translate, matrix_scale_translate, matrix_affine;
typedef void (*Swizzle_8888_8888)(uint32_t[], const uint32_t[], int);
extern Swizzle_8888_8888 premul_xxxa, // BGRA -> bgrA or RGBA -> rgbA
swaprb_xxxa, // BGRA -> RGBA or RGBA -> BGRA
premul_swaprb_xxxa; // BGRA -> rgbA or RGBA -> bgrA
}
#endif//SkOpts_DEFINED