blob: 294fbc2b1b932b5ae7fae932327a9ede4d43e13b [file] [log] [blame]
/*
* 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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkData.h"
#include "include/core/SkEncodedImageFormat.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
#include <utility>
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)(GrRecordingContext*, SkPicture*, const SkImageInfo&);
static sk_sp<SkImage> make_raster(GrRecordingContext*,
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(GrRecordingContext* 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(GrRecordingContext*,
SkPicture* pic,
const SkImageInfo& info) {
return SkImage::MakeFromPicture(sk_ref_sp(pic), info.dimensions(), nullptr, nullptr,
SkImage::BitDepth::kU8,
SkColorSpace::MakeSRGB());
}
static sk_sp<SkImage> make_encode_gen(GrRecordingContext* ctx,
SkPicture* pic,
const SkImageInfo& info) {
sk_sp<SkImage> src(make_raster(ctx, pic, info));
if (!src) {
return nullptr;
}
sk_sp<SkData> encoded = src->encodeToData(SkEncodedImageFormat::kPNG, 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 SkTileMode tile = SkTileMode::kRepeat;
const SkMatrix localM = SkMatrix::Translate(-50, -50);
SkPaint paint;
paint.setShader(image->makeShader(tile, tile, SkSamplingOptions(), &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 < std::size(gProcs); ++i) {
sk_sp<SkImage> image(gProcs[i](canvas->recordingContext(), fPicture.get(), info));
if (image) {
this->testImage(canvas, image.get());
}
canvas->translate(120, 0);
}
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ImageShaderGM; )
//////////////////////////////////////////////////////////////////////////////////////////////
#include "tools/ToolUtils.h"
static sk_sp<SkImage> make_checker_img(int w, int h, SkColor c0, SkColor c1, int size) {
SkBitmap bm = ToolUtils::create_checkerboard_bitmap(w, h, c0, c1, size);
bm.setImmutable();
return bm.asImage();
}
DEF_SIMPLE_GM(drawimage_sampling, canvas, 500, 500) {
constexpr int N = 256;
constexpr float kScale = 1.0f/6;
const SkRect dst = {0, 0, kScale*N, kScale*N};
auto img = make_checker_img(N, N, SK_ColorBLACK, SK_ColorWHITE, 7)->withDefaultMipmaps();
const SkRect src = SkRect::MakeIWH(img->width(), img->height());
SkMatrix mx = SkMatrix::RectToRect(src, dst);
SkPaint paint;
for (auto mm : {SkMipmapMode::kNone, SkMipmapMode::kNearest, SkMipmapMode::kLinear}) {
for (auto fm : {SkFilterMode::kNearest, SkFilterMode::kLinear}) {
SkSamplingOptions sampling(fm, mm);
canvas->save();
canvas->save();
canvas->concat(mx);
canvas->drawImage(img.get(), 0, 0, sampling);
canvas->restore();
canvas->translate(dst.width() + 4, 0);
paint.setShader(img->makeShader(SkTileMode::kClamp, SkTileMode::kClamp, sampling, &mx));
canvas->drawRect(dst, paint);
canvas->translate(dst.width() + 4, 0);
canvas->drawImageRect(img.get(), src, dst, sampling, nullptr,
SkCanvas::kFast_SrcRectConstraint);
canvas->restore();
canvas->translate(0, dst.height() + 8);
}
}
}
// Test case for skbug.com/12685 (texture-backed image shaders silently fail drawing to CPU canvas)
DEF_SIMPLE_GM(textureimage_and_shader, canvas, 100, 50) {
canvas->clear(SK_ColorGREEN);
sk_sp<SkImage> image;
if (canvas->getSurface()) {
image = canvas->getSurface()->makeImageSnapshot();
canvas->clear(SK_ColorRED);
} else {
auto greenSurface = SkSurface::MakeRasterN32Premul(50, 50);
greenSurface->getCanvas()->clear(SK_ColorGREEN);
image = greenSurface->makeImageSnapshot();
}
// At this point, 'image' contains a green image. If our original canvas is GPU-backed, then
// the snapped image will be a (GPU) texture. We will try to draw that image to a non-GPU
// surface, to ensure that we get automatic read-back. If all goes well, we will get a pure
// green result. If either draw fails, we'll get red (most likely).
auto surface = SkSurface::MakeRasterN32Premul(50, 50);
// First, use drawImage:
surface->getCanvas()->clear(SK_ColorRED);
surface->getCanvas()->drawImage(image, 0, 0);
canvas->drawImage(surface->makeImageSnapshot(), 0, 0);
// Now, use an image shader:
SkPaint paint;
paint.setShader(image->makeShader(SkSamplingOptions()));
surface->getCanvas()->clear(SK_ColorRED);
surface->getCanvas()->drawPaint(paint);
canvas->drawImage(surface->makeImageSnapshot(), 50, 0);
}