84014f03a9
This only changes behavior when the input SkBitmap/SkPixmap is tagged with a non-null SkColorSpace. Android tags their bitmaps as sRGB when linear blending is enabled. So this only changes behavior in Android when linear blending is turned on. *If linear blending is turned on, this will do a color correct encode (which is the desired behavior). *If linear blending is turned off, this will do a legacy encode. TODO: Add support for F16. TODO: Add color space support to WEBP. TODO: Tag encoded images with ICC profiles (when it makes sense). BUG=skia: Change-Id: Idd8a2836371d24a453d953e6fe2e76a87751be96 Reviewed-on: https://skia-review.googlesource.com/6498 Reviewed-by: Brian Osman <brianosman@google.com> Reviewed-by: Leon Scroggins <scroggo@google.com> Reviewed-by: Mike Klein <mtklein@chromium.org> Commit-Queue: Matt Sarett <msarett@google.com>
124 lines
4.1 KiB
C++
124 lines
4.1 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "Resources.h"
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#include "SkCanvas.h"
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#include "SkData.h"
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#include "SkImageEncoderPriv.h"
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#include "SkUnPreMultiply.h"
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namespace skiagm {
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static void make_opaque_256(SkBitmap* bitmap) {
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GetResourceAsBitmap("mandrill_256.png", bitmap);
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}
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static void make_premul_256(SkBitmap* bitmap) {
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SkBitmap tmp;
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GetResourceAsBitmap("yellow_rose.png", &tmp);
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tmp.extractSubset(bitmap, SkIRect::MakeWH(256, 256));
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bitmap->lockPixels();
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}
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static void make_unpremul_256(SkBitmap* bitmap) {
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make_premul_256(bitmap);
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for (int y = 0; y < bitmap->height(); y++) {
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for (int x = 0; x < bitmap->width(); x++) {
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SkPMColor* pixel = bitmap->getAddr32(x, y);
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*pixel = SkUnPreMultiply::UnPreMultiplyPreservingByteOrder(*pixel);
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}
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}
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bitmap->setAlphaType(kUnpremul_SkAlphaType);
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}
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#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
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static SkEncodedImageFormat kTypes[] {
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SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kJPEG, SkEncodedImageFormat::kGIF,
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SkEncodedImageFormat::kBMP, SkEncodedImageFormat::kICO,
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};
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#elif defined(SK_BUILD_FOR_WIN)
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// Use PNG multiple times because our WIC encoder does not support GIF, BMP, or ICO.
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static SkEncodedImageFormat kTypes[] {
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SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kJPEG, SkEncodedImageFormat::kPNG,
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SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kPNG,
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};
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#else
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// Use WEBP in place of GIF. Use PNG two extra times. We don't support GIF, BMP, or ICO.
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static SkEncodedImageFormat kTypes[] {
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SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kJPEG, SkEncodedImageFormat::kWEBP,
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SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kPNG,
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};
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#endif
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static sk_sp<SkData> encode_data(SkEncodedImageFormat type, const SkBitmap& bitmap) {
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SkAutoLockPixels autoLockPixels(bitmap);
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SkPixmap src;
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if (!bitmap.peekPixels(&src)) {
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return nullptr;
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}
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SkDynamicMemoryWStream buf;
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#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
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return SkEncodeImageWithCG(&buf, src, type) ? buf.detachAsData() : nullptr;
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#elif defined(SK_BUILD_FOR_WIN)
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return SkEncodeImageWithWIC(&buf, src, type, 100) ? buf.detachAsData() : nullptr;
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#else
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switch (type) {
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case SkEncodedImageFormat::kPNG:
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return SkEncodeImageAsPNG(&buf, src, SkEncodeOptions()) ? buf.detachAsData()
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: nullptr;
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case SkEncodedImageFormat::kJPEG:
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return SkEncodeImageAsJPEG(&buf, src, 100) ? buf.detachAsData() : nullptr;
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case SkEncodedImageFormat::kWEBP:
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return SkEncodeImageAsWEBP(&buf, src, 100) ? buf.detachAsData() : nullptr;
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default:
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SkASSERT(false);
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return nullptr;
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}
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#endif
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}
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class EncodePlatformGM : public GM {
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public:
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EncodePlatformGM() {}
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protected:
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SkString onShortName() override {
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return SkString("encode-platform");
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}
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SkISize onISize() override {
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return SkISize::Make(256 * SK_ARRAY_COUNT(kTypes), 256 * 3);
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}
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void onDraw(SkCanvas* canvas) override {
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SkBitmap opaqueBm, premulBm, unpremulBm;
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make_opaque_256(&opaqueBm);
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make_premul_256(&premulBm);
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make_unpremul_256(&unpremulBm);
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for (SkEncodedImageFormat type : kTypes) {
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auto opaqueImage = SkImage::MakeFromEncoded(encode_data(type, opaqueBm));
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auto premulImage = SkImage::MakeFromEncoded(encode_data(type, premulBm));
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auto unpremulImage = SkImage::MakeFromEncoded(encode_data(type, unpremulBm));
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canvas->drawImage(opaqueImage.get(), 0.0f, 0.0f);
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canvas->drawImage(premulImage.get(), 0.0f, 256.0f);
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canvas->drawImage(unpremulImage.get(), 0.0f, 512.0f);
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canvas->translate(256.0f, 0.0f);
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}
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new EncodePlatformGM; )
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}
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