f1b4382421
This removes a long-standing source of confusion: SkImage_Generator was an image that wrapped an SkImageGenerator (with an SkImageCacherator stuck in the middle). We could choose to rename either one, but SkImageGenerator is public, so take the easy road and rename the private image subclass. Given the existence of SkImage::isLazyGenerated, this name seems appropriate. Bug: skia: Change-Id: I061ece94f48538efb1dc5548010f6ca7d438a69b Reviewed-on: https://skia-review.googlesource.com/13979 Reviewed-by: Matt Sarett <msarett@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
91 lines
2.8 KiB
C++
91 lines
2.8 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 "sk_tool_utils.h"
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#include "SkCanvas.h"
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#include "SkImage.h"
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#include "SkImageGenerator.h"
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#include "SkMakeUnique.h"
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#include "SkSurface.h"
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namespace {
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const SkISize kSize = SkISize::Make(100, 100);
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const SkIRect kSubset = SkIRect::MakeLTRB(25, 25, 75, 75);
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const SkRect kDest = SkRect::MakeXYWH(10, 10, 100, 100);
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sk_sp<SkImage> make_mask(const sk_sp<SkSurface>& surface) {
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sk_tool_utils::draw_checkerboard(surface->getCanvas(), 0x80808080, 0x00000000, 5);
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return surface->makeImageSnapshot();
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}
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class MaskGenerator final : public SkImageGenerator {
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public:
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MaskGenerator(const SkImageInfo& info) : INHERITED(info) {}
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bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor*,
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int*) override {
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if (info.colorType() == kIndex_8_SkColorType) {
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return false;
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}
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SkImageInfo surfaceInfo = info;
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if (kAlpha_8_SkColorType == info.colorType()) {
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surfaceInfo = surfaceInfo.makeColorSpace(nullptr);
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}
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make_mask(SkSurface::MakeRasterDirect(surfaceInfo, pixels, rowBytes));
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return true;
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}
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private:
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typedef SkImageGenerator INHERITED;
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};
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using MakerT = sk_sp<SkImage>(*)(SkCanvas*, const SkImageInfo&);
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const MakerT makers[] = {
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// SkImage_Raster
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[](SkCanvas*, const SkImageInfo& info) -> sk_sp<SkImage> {
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return make_mask(SkSurface::MakeRaster(info));
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},
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// SkImage_Gpu
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[](SkCanvas* c, const SkImageInfo& info) -> sk_sp<SkImage> {
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sk_sp<SkSurface> surface;
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#if SK_SUPPORT_GPU
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surface = SkSurface::MakeRenderTarget(c->getGrContext(), SkBudgeted::kNo, info);
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#endif
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return make_mask(surface ? surface : SkSurface::MakeRaster(info));
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},
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// SkImage_Lazy
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[](SkCanvas*, const SkImageInfo& info) -> sk_sp<SkImage> {
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return SkImage::MakeFromGenerator(skstd::make_unique<MaskGenerator>(info));
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},
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};
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} // anonymous ns
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// Checks whether subset SkImages preserve the original color type (A8 in this case).
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DEF_SIMPLE_GM(imagemasksubset, canvas, 480, 480) {
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SkPaint paint;
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paint.setColor(0xff00ff00);
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const SkImageInfo info = SkImageInfo::MakeA8(kSize.width(), kSize.height());
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for (size_t i = 0; i < SK_ARRAY_COUNT(makers); ++i) {
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sk_sp<SkImage> image = makers[i](canvas, info);
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if (image) {
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canvas->drawImageRect(image, SkRect::Make(kSubset), kDest, &paint);
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sk_sp<SkImage> subset = image->makeSubset(kSubset);
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canvas->drawImageRect(subset, kDest.makeOffset(kSize.width() * 1.5f, 0), &paint);
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}
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canvas->translate(0, kSize.height() * 1.5f);
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}
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}
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