130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/*
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* Copyright 2015 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 "SkCanvas.h"
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#include "SkData.h"
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#include "SkImage.h"
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#include "SkPictureRecorder.h"
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#include "SkSurface.h"
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static void draw_something(SkCanvas* canvas, const SkRect& bounds) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorRED);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(10);
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canvas->drawRect(bounds, paint);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setColor(SK_ColorBLUE);
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canvas->drawOval(bounds, paint);
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}
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typedef SkImage* (*ImageMakerProc)(GrContext*, const SkPicture*, const SkImageInfo&);
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static SkImage* make_raster(GrContext*, const SkPicture* pic, const SkImageInfo& info) {
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SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
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surface->getCanvas()->clear(0);
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surface->getCanvas()->drawPicture(pic);
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return surface->newImageSnapshot();
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}
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static SkImage* make_texture(GrContext* ctx, const SkPicture* pic, const SkImageInfo& info) {
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if (!ctx) {
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return nullptr;
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}
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SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgeted,
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info, 0));
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surface->getCanvas()->clear(0);
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surface->getCanvas()->drawPicture(pic);
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return surface->newImageSnapshot();
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}
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static SkImage* make_pict_gen(GrContext*, const SkPicture* pic, const SkImageInfo& info) {
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return SkImage::NewFromPicture(pic, info.dimensions(), nullptr, nullptr);
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}
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static SkImage* make_encode_gen(GrContext* ctx, const SkPicture* pic, const SkImageInfo& info) {
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SkAutoTUnref<SkImage> src(make_raster(ctx, pic, info));
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if (!src) {
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return nullptr;
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}
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SkAutoTUnref<SkData> encoded(src->encode(SkImageEncoder::kPNG_Type, 100));
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if (!encoded) {
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return nullptr;
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}
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return SkImage::NewFromEncoded(encoded);
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}
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const ImageMakerProc gProcs[] = {
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make_raster,
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make_texture,
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make_pict_gen,
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make_encode_gen,
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};
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/*
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* Exercise drawing pictures inside an image, showing that the image version is pixelated
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* (correctly) when it is inside an image.
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*/
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class ImageShaderGM : public skiagm::GM {
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SkAutoTUnref<SkPicture> fPicture;
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public:
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ImageShaderGM() {}
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protected:
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SkString onShortName() override {
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return SkString("image-shader");
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}
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SkISize onISize() override {
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return SkISize::Make(850, 450);
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}
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void onOnceBeforeDraw() override {
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const SkRect bounds = SkRect::MakeWH(100, 100);
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SkPictureRecorder recorder;
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draw_something(recorder.beginRecording(bounds), bounds);
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fPicture.reset(recorder.endRecording());
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}
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void testImage(SkCanvas* canvas, SkImage* image) {
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SkAutoCanvasRestore acr(canvas, true);
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canvas->drawImage(image, 0, 0);
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canvas->translate(0, 120);
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const SkShader::TileMode tile = SkShader::kRepeat_TileMode;
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const SkMatrix localM = SkMatrix::MakeTrans(-50, -50);
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SkAutoTUnref<SkShader> shader(image->newShader(tile, tile, &localM));
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setShader(shader);
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canvas->drawCircle(50, 50, 50, paint);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(20, 20);
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const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
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for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
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SkAutoTUnref<SkImage> image(gProcs[i](canvas->getGrContext(), fPicture, info));
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if (image) {
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this->testImage(canvas, image);
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}
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canvas->translate(120, 0);
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}
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new ImageShaderGM; )
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