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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 "SkColorPriv.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_XferFilter : public SkSpriteBlitter {
public:
Sprite_D32_XferFilter(const SkPixmap& source, const SkPaint& paint) : SkSpriteBlitter(source) {
fColorFilter = paint.getColorFilter();
SkSafeRef(fColorFilter);
fXfermode = SkXfermode::Peek(paint.getBlendMode());
fBufferSize = 0;
fBuffer = nullptr;
unsigned flags32 = 0;
if (255 != paint.getAlpha()) {
flags32 |= SkBlitRow::kGlobalAlpha_Flag32;
}
if (!source.isOpaque()) {
flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32;
}
fProc32 = SkBlitRow::Factory32(flags32);
fAlpha = paint.getAlpha();
}
~Sprite_D32_XferFilter() override {
delete[] fBuffer;
SkSafeUnref(fColorFilter);
}
void setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) override {
this->INHERITED::setup(dst, left, top, paint);
int width = dst.width();
if (width > fBufferSize) {
fBufferSize = width;
delete[] fBuffer;
fBuffer = new SkPMColor[width];
}
}
protected:
SkColorFilter* fColorFilter;
SkXfermode* fXfermode;
int fBufferSize;
SkPMColor* fBuffer;
SkBlitRow::Proc32 fProc32;
U8CPU fAlpha;
private:
typedef SkSpriteBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class Sprite_D32_S32A_XferFilter : public Sprite_D32_XferFilter {
public:
Sprite_D32_S32A_XferFilter(const SkPixmap& source, const SkPaint& paint)
: Sprite_D32_XferFilter(source, paint) {}
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();
SkColorFilter* colorFilter = fColorFilter;
SkXfermode* xfermode = fXfermode;
do {
const SkPMColor* tmp = src;
if (colorFilter) {
colorFilter->filterSpan(src, width, fBuffer);
tmp = fBuffer;
}
if (xfermode) {
xfermode->xfer32(dst, tmp, width, nullptr);
} else {
fProc32(dst, tmp, width, fAlpha);
}
dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB);
src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
private:
typedef Sprite_D32_XferFilter INHERITED;
};
static void fillbuffer(SkPMColor* SK_RESTRICT dst,
const SkPMColor16* SK_RESTRICT src, int count) {
SkASSERT(count > 0);
do {
*dst++ = SkPixel4444ToPixel32(*src++);
} while (--count != 0);
}
class Sprite_D32_S4444_XferFilter : public Sprite_D32_XferFilter {
public:
Sprite_D32_S4444_XferFilter(const SkPixmap& source, const SkPaint& paint)
: Sprite_D32_XferFilter(source, paint) {}
void blitRect(int x, int y, int width, int height) override {
SkASSERT(width > 0 && height > 0);
SkPMColor* SK_RESTRICT dst = fDst.writable_addr32(x, y);
const SkPMColor16* SK_RESTRICT src = fSource.addr16(x - fLeft, y - fTop);
size_t dstRB = fDst.rowBytes();
size_t srcRB = fSource.rowBytes();
SkPMColor* SK_RESTRICT buffer = fBuffer;
SkColorFilter* colorFilter = fColorFilter;
SkXfermode* xfermode = fXfermode;
do {
fillbuffer(buffer, src, width);
if (colorFilter) {
colorFilter->filterSpan(buffer, width, buffer);
}
if (xfermode) {
xfermode->xfer32(dst, buffer, width, nullptr);
} else {
fProc32(dst, buffer, width, fAlpha);
}
dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
private:
typedef Sprite_D32_XferFilter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static void src_row(SkPMColor* SK_RESTRICT dst,
const SkPMColor16* SK_RESTRICT src, int count) {
do {
*dst = SkPixel4444ToPixel32(*src);
src += 1;
dst += 1;
} while (--count != 0);
}
class Sprite_D32_S4444_Opaque : public SkSpriteBlitter {
public:
Sprite_D32_S4444_Opaque(const SkPixmap& source) : SkSpriteBlitter(source) {}
void blitRect(int x, int y, int width, int height) override {
SkASSERT(width > 0 && height > 0);
SkPMColor* SK_RESTRICT dst = fDst.writable_addr32(x, y);
const SkPMColor16* SK_RESTRICT src = fSource.addr16(x - fLeft, y - fTop);
size_t dstRB = fDst.rowBytes();
size_t srcRB = fSource.rowBytes();
do {
src_row(dst, src, width);
dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
};
static void srcover_row(SkPMColor* SK_RESTRICT dst,
const SkPMColor16* SK_RESTRICT src, int count) {
do {
*dst = SkPMSrcOver(SkPixel4444ToPixel32(*src), *dst);
src += 1;
dst += 1;
} while (--count != 0);
}
class Sprite_D32_S4444 : public SkSpriteBlitter {
public:
Sprite_D32_S4444(const SkPixmap& source) : SkSpriteBlitter(source) {}
void blitRect(int x, int y, int width, int height) override {
SkASSERT(width > 0 && height > 0);
SkPMColor* SK_RESTRICT dst = fDst.writable_addr32(x, y);
const SkPMColor16* SK_RESTRICT src = fSource.addr16(x - fLeft, y - fTop);
size_t dstRB = fDst.rowBytes();
size_t srcRB = fSource.rowBytes();
do {
srcover_row(dst, src, width);
dst = (SkPMColor* SK_RESTRICT)((char*)dst + dstRB);
src = (const SkPMColor16* SK_RESTRICT)((const char*)src + srcRB);
} while (--height != 0);
}
};
///////////////////////////////////////////////////////////////////////////////
SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPaint& paint,
SkArenaAlloc* allocator) {
SkASSERT(allocator != nullptr);
if (paint.getMaskFilter() != nullptr) {
return nullptr;
}
U8CPU alpha = paint.getAlpha();
bool isSrcOver = paint.isSrcOver();
SkColorFilter* filter = paint.getColorFilter();
SkSpriteBlitter* blitter = nullptr;
switch (source.colorType()) {
case kARGB_4444_SkColorType:
if (alpha != 0xFF) {
return nullptr; // we only have opaque sprites
}
if (!isSrcOver || filter) {
blitter = allocator->make<Sprite_D32_S4444_XferFilter>(source, paint);
} else if (source.isOpaque()) {
blitter = allocator->make<Sprite_D32_S4444_Opaque>(source);
} else {
blitter = allocator->make<Sprite_D32_S4444>(source);
}
break;
case kN32_SkColorType:
if (!isSrcOver || filter) {
if (255 == alpha) {
// this can handle xfermode or filter, but not alpha
blitter = allocator->make<Sprite_D32_S32A_XferFilter>(source, paint);
}
} else {
// this can handle alpha, but not xfermode or filter
blitter = allocator->make<Sprite_D32_S32>(source, alpha);
}
break;
default:
break;
}
return blitter;
}
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