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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 "include/core/SkColorFilter.h"
- #include "include/core/SkPaint.h"
- #include "include/private/SkColorData.h"
- #include "include/private/SkTemplates.h"
- #include "src/core/SkArenaAlloc.h"
- #include "src/core/SkBlitRow.h"
- #include "src/core/SkSpriteBlitter.h"
- #include "src/core/SkXfermodePriv.h"
- #include "src/utils/SkUTF.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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