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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSpriteBlitter.h"
#include "SkArenaAlloc.h"
#include "SkBlitRow.h"
#include "SkColorFilter.h"
#include "SkColorData.h"
#include "SkPaint.h"
#include "SkTemplates.h"
#include "SkUtils.h"
#include "SkXfermodePriv.h"
///////////////////////////////////////////////////////////////////////////////
class Sprite_D32_S32 : public SkSpriteBlitter {
public:
Sprite_D32_S32(const SkPixmap& src, U8CPU alpha) : INHERITED(src) {
SkASSERT(src.colorType() == kN32_SkColorType);
unsigned flags32 = 0;
if (255 != alpha) {
flags32 |= SkBlitRow::kGlobalAlpha_Flag32;
}
if (!src.isOpaque()) {
flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32;
}
fProc32 = SkBlitRow::Factory32(flags32);
fAlpha = alpha;
}
void blitRect(int x, int y, int width, int height) override {
SkASSERT(width > 0 && height > 0);
uint32_t* SK_RESTRICT dst = fDst.writable_addr32(x, y);
const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop);
size_t dstRB = fDst.rowBytes();
size_t srcRB = fSource.rowBytes();
SkBlitRow::Proc32 proc = fProc32;
U8CPU alpha = fAlpha;
do {
proc(dst, src, width, alpha);
dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
private:
SkBlitRow::Proc32 fProc32;
U8CPU fAlpha;
typedef SkSpriteBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class Sprite_D32_S32A_Xfer: public SkSpriteBlitter {
public:
Sprite_D32_S32A_Xfer(const SkPixmap& source, const SkPaint& paint) : SkSpriteBlitter(source) {
fXfermode = SkXfermode::Peek(paint.getBlendMode());
SkASSERT(fXfermode);
}
void blitRect(int x, int y, int width, int height) override {
SkASSERT(width > 0 && height > 0);
uint32_t* SK_RESTRICT dst = fDst.writable_addr32(x, y);
const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop);
size_t dstRB = fDst.rowBytes();
size_t srcRB = fSource.rowBytes();
SkXfermode* xfermode = fXfermode;
do {
xfermode->xfer32(dst, src, width, nullptr);
dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
protected:
SkXfermode* fXfermode;
private:
typedef SkSpriteBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPaint& paint,
SkArenaAlloc* allocator) {
SkASSERT(allocator != nullptr);
if (paint.getColorFilter() != nullptr) {
return nullptr;
}
if (paint.getMaskFilter() != nullptr) {
return nullptr;
}
U8CPU alpha = paint.getAlpha();
if (source.colorType() == kN32_SkColorType) {
if (paint.isSrcOver()) {
// this can handle alpha, but not xfermode
return allocator->make<Sprite_D32_S32>(source, alpha);
}
if (255 == alpha) {
// this can handle an xfermode, but not alpha
return allocator->make<Sprite_D32_S32A_Xfer>(source, paint);
}
}
return nullptr;
}
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