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- /*
- * Copyright 2017 Google Inc.
- *
- * 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"
- ///////////////////////////////////////////////////////////////////////////////
- static void S32_src(uint16_t dst[], const SkPMColor src[], int count) {
- for (int i = 0; i < count; ++i) {
- dst[i] = SkPixel32ToPixel16(src[i]);
- }
- }
- static void S32_srcover(uint16_t dst[], const SkPMColor src[], int count) {
- for (int i = 0; i < count; ++i) {
- dst[i] = SkSrcOver32To16(src[i], dst[i]);
- }
- }
- class Sprite_D16_S32 : public SkSpriteBlitter {
- public:
- Sprite_D16_S32(const SkPixmap& src, SkBlendMode mode) : INHERITED(src) {
- SkASSERT(src.colorType() == kN32_SkColorType);
- SkASSERT(mode == SkBlendMode::kSrc || mode == SkBlendMode::kSrcOver);
- fUseSrcOver = (mode == SkBlendMode::kSrcOver) && !src.isOpaque();
- }
- void blitRect(int x, int y, int width, int height) override {
- SkASSERT(width > 0 && height > 0);
- uint16_t* SK_RESTRICT dst = fDst.writable_addr16(x, y);
- const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop);
- size_t dstRB = fDst.rowBytes();
- size_t srcRB = fSource.rowBytes();
- do {
- if (fUseSrcOver) {
- S32_srcover(dst, src, width);
- } else {
- S32_src(dst, src, width);
- }
- dst = (uint16_t* SK_RESTRICT)((char*)dst + dstRB);
- src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
- } while (--height != 0);
- }
- private:
- bool fUseSrcOver;
- typedef SkSpriteBlitter INHERITED;
- };
- SkSpriteBlitter* SkSpriteBlitter::ChooseL565(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 (alpha != 0xFF) {
- return nullptr;
- }
- if (source.colorType() == kN32_SkColorType) {
- switch (paint.getBlendMode()) {
- case SkBlendMode::kSrc:
- case SkBlendMode::kSrcOver:
- return allocator->make<Sprite_D16_S32>(source, paint.getBlendMode());
- default:
- break;
- }
- }
- return nullptr;
- }
- //////////////////////////////////////////////////////////////////////////////////////////////////
- static unsigned div255(unsigned a, unsigned b) {
- return (a * b * 257 + 127) >> 16;
- }
- static void S32_src_da8(uint8_t dst[], const SkPMColor src[], int count) {
- for (int i = 0; i < count; ++i) {
- dst[i] = SkGetPackedA32(src[i]);
- }
- }
- static void S32_srcover_da8(uint8_t dst[], const SkPMColor src[], int count) {
- for (int i = 0; i < count; ++i) {
- SkPMColor c = src[i];
- if (c) {
- unsigned a = SkGetPackedA32(c);
- if (a == 0xFF) {
- dst[i] = 0xFF;
- } else {
- dst[i] = a + div255(255 - a, dst[i]);
- }
- }
- }
- }
- class Sprite_D8_S32 : public SkSpriteBlitter {
- public:
- Sprite_D8_S32(const SkPixmap& src, SkBlendMode mode) : INHERITED(src) {
- SkASSERT(src.colorType() == kN32_SkColorType);
- SkASSERT(mode == SkBlendMode::kSrc || mode == SkBlendMode::kSrcOver);
- fUseSrcOver = (mode == SkBlendMode::kSrcOver) && !src.isOpaque();
- }
- void blitRect(int x, int y, int width, int height) override {
- SkASSERT(width > 0 && height > 0);
- uint8_t* SK_RESTRICT dst = fDst.writable_addr8(x, y);
- const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop);
- size_t dstRB = fDst.rowBytes();
- size_t srcRB = fSource.rowBytes();
- do {
- if (fUseSrcOver) {
- S32_srcover_da8(dst, src, width);
- } else {
- S32_src_da8(dst, src, width);
- }
- dst = (uint8_t* SK_RESTRICT)((char*)dst + dstRB);
- src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB);
- } while (--height != 0);
- }
- private:
- bool fUseSrcOver;
- typedef SkSpriteBlitter INHERITED;
- };
- SkSpriteBlitter* SkSpriteBlitter::ChooseLA8(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 (alpha != 0xFF) {
- return nullptr;
- }
- if (source.colorType() == kN32_SkColorType) {
- switch (paint.getBlendMode()) {
- case SkBlendMode::kSrc:
- case SkBlendMode::kSrcOver:
- return allocator->make<Sprite_D8_S32>(source, paint.getBlendMode());
- default:
- break;
- }
- }
- return nullptr;
- }
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