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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkColorFilter.h"
#include "SkHalf.h"
#include "SkNx.h"
#include "SkPaint.h"
#include "SkPixmap.h"
#include "SkPM4f.h"
#include "SkPM4fPriv.h"
#include "SkSpanProcs.h"
///////////////////////////////////////////////////////////////////////////////////////////////////
static void load_l32(const SkPixmap& src, int x, int y, SkPM4f span[], int count) {
SkASSERT(count > 0);
const uint32_t* addr = src.addr32(x, y);
SkASSERT(src.addr32(x + count - 1, y));
for (int i = 0; i < count; ++i) {
swizzle_rb_if_bgra(Sk4f_fromL32(addr[i])).store(span[i].fVec);
}
}
static void load_s32(const SkPixmap& src, int x, int y, SkPM4f span[], int count) {
SkASSERT(count > 0);
const uint32_t* addr = src.addr32(x, y);
SkASSERT(src.addr32(x + count - 1, y));
for (int i = 0; i < count; ++i) {
swizzle_rb_if_bgra(Sk4f_fromS32(addr[i])).store(span[i].fVec);
}
}
static void load_f16(const SkPixmap& src, int x, int y, SkPM4f span[], int count) {
SkASSERT(count > 0);
const uint64_t* addr = src.addr64(x, y);
SkASSERT(src.addr64(x + count - 1, y));
for (int i = 0; i < count; ++i) {
SkHalfToFloat_finite_ftz(addr[i]).store(span[i].fVec);
}
}
SkLoadSpanProc SkLoadSpanProc_Choose(const SkImageInfo& info) {
switch (info.colorType()) {
case kN32_SkColorType:
return info.gammaCloseToSRGB() ? load_s32 : load_l32;
case kRGBA_F16_SkColorType:
return load_f16;
default:
return nullptr;
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
static void noop_filterspan(const SkPaint& paint, SkPM4f[], int) {
SkASSERT(!paint.getColorFilter());
SkASSERT(0xFF == paint.getAlpha());
}
static void alpha_filterspan(const SkPaint& paint, SkPM4f span[], int count) {
SkASSERT(!paint.getColorFilter());
SkASSERT(0xFF != paint.getAlpha());
const Sk4f scale = Sk4f(paint.getAlpha() * (1.0f/255));
for (int i = 0; i < count; ++i) {
(Sk4f::Load(span[i].fVec) * scale).store(span[i].fVec);
}
}
static void colorfilter_filterspan(const SkPaint& paint, SkPM4f span[], int count) {
SkASSERT(paint.getColorFilter());
SkASSERT(0xFF == paint.getAlpha());
paint.getColorFilter()->filterSpan4f(span, count, span);
}
static void colorfilter_alpha_filterspan(const SkPaint& paint, SkPM4f span[], int count) {
SkASSERT(paint.getColorFilter());
SkASSERT(0xFF != paint.getAlpha());
alpha_filterspan(paint, span, count);
paint.getColorFilter()->filterSpan4f(span, count, span);
}
SkFilterSpanProc SkFilterSpanProc_Choose(const SkPaint& paint) {
if (paint.getColorFilter()) {
return 0xFF == paint.getAlpha() ? colorfilter_filterspan : colorfilter_alpha_filterspan;
} else {
return 0xFF == paint.getAlpha() ? noop_filterspan : alpha_filterspan;
}
}
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