| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkImageGenerator.h" |
| #include "SkImagePriv.h" |
| #include "SkImage_Base.h" |
| #include "SkReadPixelsRec.h" |
| #include "SkString.h" |
| #include "SkSurface.h" |
| |
| uint32_t SkImage::NextUniqueID() { |
| static int32_t gUniqueID; |
| |
| // never return 0; |
| uint32_t id; |
| do { |
| id = sk_atomic_inc(&gUniqueID) + 1; |
| } while (0 == id); |
| return id; |
| } |
| |
| void SkImage::draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const { |
| as_IB(this)->onDraw(canvas, x, y, paint); |
| } |
| |
| void SkImage::drawRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst, |
| const SkPaint* paint) const { |
| as_IB(this)->onDrawRect(canvas, src, dst, paint); |
| } |
| |
| const void* SkImage::peekPixels(SkImageInfo* info, size_t* rowBytes) const { |
| SkImageInfo infoStorage; |
| size_t rowBytesStorage; |
| if (NULL == info) { |
| info = &infoStorage; |
| } |
| if (NULL == rowBytes) { |
| rowBytes = &rowBytesStorage; |
| } |
| return as_IB(this)->onPeekPixels(info, rowBytes); |
| } |
| |
| bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, |
| int srcX, int srcY) const { |
| SkReadPixelsRec rec(dstInfo, dstPixels, dstRowBytes, srcX, srcY); |
| if (!rec.trim(this->width(), this->height())) { |
| return false; |
| } |
| return as_IB(this)->onReadPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, rec.fX, rec.fY); |
| } |
| |
| GrTexture* SkImage::getTexture() { |
| return as_IB(this)->onGetTexture(); |
| } |
| |
| SkShader* SkImage::newShader(SkShader::TileMode tileX, |
| SkShader::TileMode tileY, |
| const SkMatrix* localMatrix) const { |
| return as_IB(this)->onNewShader(tileX, tileY, localMatrix); |
| } |
| |
| SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const { |
| SkBitmap bm; |
| if (as_IB(this)->getROPixels(&bm)) { |
| return SkImageEncoder::EncodeData(bm, type, quality); |
| } |
| return NULL; |
| } |
| |
| SkImage* SkImage::NewFromData(SkData* data) { |
| if (NULL == data) { |
| return NULL; |
| } |
| SkImageGenerator* generator = SkImageGenerator::NewFromData(data); |
| return generator ? SkImage::NewFromGenerator(generator) : NULL; |
| } |
| |
| SkSurface* SkImage::newSurface(const SkImageInfo& info, const SkSurfaceProps* props) const { |
| if (NULL == props) { |
| props = &as_IB(this)->props(); |
| } |
| return as_IB(this)->onNewSurface(info, *props); |
| } |
| |
| const char* SkImage::toString(SkString* str) const { |
| str->appendf("image: (id:%d (%d, %d) %s)", this->uniqueID(), this->width(), this->height(), |
| this->isOpaque() ? "opaque" : ""); |
| return str->c_str(); |
| } |
| |
| SkImage* SkImage::newImage(int newWidth, int newHeight, const SkIRect* subset, |
| SkFilterQuality quality) const { |
| if (newWidth <= 0 || newHeight <= 0) { |
| return NULL; |
| } |
| |
| const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height()); |
| |
| if (subset) { |
| if (!bounds.contains(*subset)) { |
| return NULL; |
| } |
| if (bounds == *subset) { |
| subset = NULL; // and fall through to check below |
| } |
| } |
| |
| if (NULL == subset && this->width() == newWidth && this->height() == newHeight) { |
| return SkRef(const_cast<SkImage*>(this)); |
| } |
| |
| return as_IB(this)->onNewImage(newWidth, newHeight, subset, quality); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool raster_canvas_supports(const SkImageInfo& info) { |
| switch (info.colorType()) { |
| case kN32_SkColorType: |
| return kUnpremul_SkAlphaType != info.alphaType(); |
| case kRGB_565_SkColorType: |
| return true; |
| case kAlpha_8_SkColorType: |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| bool SkImage_Base::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, |
| int srcX, int srcY) const { |
| if (!raster_canvas_supports(dstInfo)) { |
| return false; |
| } |
| |
| SkBitmap bm; |
| bm.installPixels(dstInfo, dstPixels, dstRowBytes); |
| SkCanvas canvas(bm); |
| |
| SkPaint paint; |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| canvas.drawImage(this, -SkIntToScalar(srcX), -SkIntToScalar(srcY), &paint); |
| |
| return true; |
| } |
| |
| SkImage* SkImage_Base::onNewImage(int newWidth, int newHeight, const SkIRect* subset, |
| SkFilterQuality quality) const { |
| const bool opaque = this->isOpaque(); |
| const SkImageInfo info = SkImageInfo::Make(newWidth, newHeight, kN32_SkColorType, |
| opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); |
| SkAutoTUnref<SkSurface> surface(this->newSurface(info, NULL)); |
| if (!surface.get()) { |
| return NULL; |
| } |
| |
| SkRect src; |
| if (subset) { |
| src.set(*subset); |
| } else { |
| src = SkRect::MakeIWH(this->width(), this->height()); |
| } |
| |
| surface->getCanvas()->scale(newWidth / src.width(), newHeight / src.height()); |
| surface->getCanvas()->translate(-src.x(), -src.y()); |
| |
| SkPaint paint; |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| paint.setFilterQuality(quality); |
| surface->getCanvas()->drawImage(this, 0, 0, &paint); |
| return surface->newImageSnapshot(); |
| } |
| |
| |