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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkImage.h"
#include "SkPictureRecorder.h"
#include "SkSurface.h"
static void draw_something(SkCanvas* canvas, const SkRect& bounds) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorRED);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(10);
canvas->drawRect(bounds, paint);
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(SK_ColorBLUE);
canvas->drawOval(bounds, paint);
}
typedef sk_sp<SkImage> (*ImageMakerProc)(GrContext*, SkPicture*, const SkImageInfo&);
static sk_sp<SkImage> make_raster(GrContext*, SkPicture* pic, const SkImageInfo& info) {
auto surface(SkSurface::MakeRaster(info));
surface->getCanvas()->clear(0);
surface->getCanvas()->drawPicture(pic);
return surface->makeImageSnapshot();
}
static sk_sp<SkImage> make_texture(GrContext* ctx, SkPicture* pic, const SkImageInfo& info) {
if (!ctx) {
return nullptr;
}
auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
if (!surface) {
return nullptr;
}
surface->getCanvas()->clear(0);
surface->getCanvas()->drawPicture(pic);
return surface->makeImageSnapshot();
}
static sk_sp<SkImage> make_pict_gen(GrContext*, SkPicture* pic, const SkImageInfo& info) {
return SkImage::MakeFromPicture(sk_ref_sp(pic), info.dimensions(), nullptr, nullptr);
}
static sk_sp<SkImage> make_encode_gen(GrContext* ctx, SkPicture* pic, const SkImageInfo& info) {
sk_sp<SkImage> src(make_raster(ctx, pic, info));
if (!src) {
return nullptr;
}
sk_sp<SkData> encoded(src->encode(SkImageEncoder::kPNG_Type, 100));
if (!encoded) {
return nullptr;
}
return SkImage::MakeFromEncoded(std::move(encoded));
}
const ImageMakerProc gProcs[] = {
make_raster,
make_texture,
make_pict_gen,
make_encode_gen,
};
/*
* Exercise drawing pictures inside an image, showing that the image version is pixelated
* (correctly) when it is inside an image.
*/
class ImageShaderGM : public skiagm::GM {
sk_sp<SkPicture> fPicture;
public:
ImageShaderGM() {}
protected:
SkString onShortName() override {
return SkString("image-shader");
}
SkISize onISize() override {
return SkISize::Make(850, 450);
}
void onOnceBeforeDraw() override {
const SkRect bounds = SkRect::MakeWH(100, 100);
SkPictureRecorder recorder;
draw_something(recorder.beginRecording(bounds), bounds);
fPicture = recorder.finishRecordingAsPicture();
}
void testImage(SkCanvas* canvas, SkImage* image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->drawImage(image, 0, 0);
canvas->translate(0, 120);
const SkShader::TileMode tile = SkShader::kRepeat_TileMode;
const SkMatrix localM = SkMatrix::MakeTrans(-50, -50);
SkPaint paint;
paint.setShader(image->makeShader(tile, tile, &localM));
paint.setAntiAlias(true);
canvas->drawCircle(50, 50, 50, paint);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(20, 20);
const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) {
sk_sp<SkImage> image(gProcs[i](canvas->getGrContext(), fPicture.get(), info));
if (image) {
this->testImage(canvas, image.get());
}
canvas->translate(120, 0);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImageShaderGM; )
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