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Re-proc SkBlitRow::Color32 for ARM.

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This is a spiritual revert of http://crrev.com/1104183004.

BUG=skia:

Review URL: https://codereview.chromium.org/1145283003
This commit is contained in:
mtklein 2015-05-21 17:14:51 -07:00 committed by Commit bot
parent 5559ca2a18
commit 4e13a23d8f
5 changed files with 31 additions and 0 deletions
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3
include/core/SkBlitRow.h
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@ -82,6 +82,9 @@ public:
static ColorProc16 PlatformColorFactory565(unsigned flags);
private:
typedef void (*Color32Proc)(SkPMColor[], const SkPMColor[], int, SkPMColor);
static Color32Proc PlatformColor32Proc();
enum {
kFlags16_Mask = 7,
kFlags32_Mask = 3

5
src/core/SkBlitRow_D32.cpp
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@ -144,6 +144,11 @@ void SkBlitRow::Color32(SkPMColor dst[], const SkPMColor src[], int count, SkPMC
case 255: sk_memset32(dst, color, count); return;
}
// This Sk4px impl works great on other platforms or when we have NEON.
#if defined(SK_CPU_ARM32) && !defined(SK_ARM_HAS_NEON)
if (auto proc = PlatformColor32Proc()) { return proc(dst, src, count, color); }
#endif
unsigned invA = 255 - SkGetPackedA32(color);
invA += invA >> 7;
SkASSERT(invA < 256); // We've already handled alpha == 0 above.

4
src/opts/SkBlitRow_opts_arm.cpp
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@ -390,3 +390,7 @@ SkBlitRow::Proc32 SkBlitRow::PlatformProcs32(unsigned flags) {
return SK_ARM_NEON_WRAP(sk_blitrow_platform_32_procs_arm)[flags];
}
SkBlitRow::Color32Proc SkBlitRow::PlatformColor32Proc() {
#define sk_blitrow_color32_arm NULL
return SK_ARM_NEON_WRAP(sk_blitrow_color32_arm);
}

17
src/opts/SkBlitRow_opts_arm_neon.cpp
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@ -1730,3 +1730,20 @@ const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[] = {
NULL
#endif
};
#include "Sk4px.h"
void sk_blitrow_color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count, SkPMColor color) {
// Until it becomes a little more reasonable to assume we'll be built with NEON,
// we copy our Sk4px implementation of SkBlitRow::Color32 here so it picks up NEON at runtime.
unsigned invA = 255 - SkGetPackedA32(color);
invA += invA >> 7;
SkASSERT(invA < 256); // Our caller has already handled the alpha == 0 case.
Sk16h colorHighAndRound = Sk4px(color).widenHi() + Sk16h(128);
Sk16b invA_16x(invA);
Sk4px::MapSrc(count, dst, src, [&](const Sk4px& src4) -> Sk4px {
return src4.mulWiden(invA_16x).addNarrowHi(colorHighAndRound);
});
}

2
src/opts/SkBlitRow_opts_arm_neon.h
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@ -13,4 +13,6 @@ extern const SkBlitRow::Proc16 sk_blitrow_platform_565_procs_arm_neon[];
extern const SkBlitRow::ColorProc16 sk_blitrow_platform_565_colorprocs_arm_neon[];
extern const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[];
extern void sk_blitrow_color32_arm_neon(SkPMColor[], const SkPMColor[], int, SkPMColor);
#endif