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skia2/gm/image_pict.cpp
Brian Salomon d0924f3ba9 Replace SkImage_Base::view() and ::refView() with new asView(). 
Make SkImage_Gpu and SkImage_GpuYUVA have their own implementations
rather than sharing one in SkImage_GpuBase.

New function takes a GrImageTexGenPolicy to enable caller to
force a new texture to be made and choose it's budgeting status rather
than receive a cached view or a view owned by the image.

It also communicates any color type changes when converting a non-
texture image to a texture.

Bug: skia:11208
Change-Id: I6b389442bf9752276a83b21021070e3190610cd7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/361356
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2021-02-03 19:05:49 +00:00

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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/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/SkImage.h"
#include "include/core/SkImageGenerator.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/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrRecordingContext.h"
#include "include/gpu/GrTypes.h"
#include "include/private/GrTypesPriv.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrSamplerState.h"
#include "src/gpu/GrSurfaceContext.h"
#include "src/gpu/GrTextureProxy.h"
#include "src/image/SkImage_Base.h"
#include "src/image/SkImage_Gpu.h"
#include <memory>
#include <utility>
class GrRecordingContext;
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);
}
/*
* Exercise drawing pictures inside an image, showing that the image version is pixelated
* (correctly) when it is inside an image.
*/
class ImagePictGM : public skiagm::GM {
sk_sp<SkPicture> fPicture;
sk_sp<SkImage> fImage0;
sk_sp<SkImage> fImage1;
public:
ImagePictGM() {}
protected:
SkString onShortName() override {
return SkString("image-picture");
}
SkISize onISize() override {
return SkISize::Make(850, 450);
}
void onOnceBeforeDraw() override {
const SkRect bounds = SkRect::MakeXYWH(100, 100, 100, 100);
SkPictureRecorder recorder;
draw_something(recorder.beginRecording(bounds), bounds);
fPicture = recorder.finishRecordingAsPicture();
// extract enough just for the oval.
const SkISize size = SkISize::Make(100, 100);
auto srgbColorSpace = SkColorSpace::MakeSRGB();
SkMatrix matrix;
matrix.setTranslate(-100, -100);
fImage0 = SkImage::MakeFromPicture(fPicture, size, &matrix, nullptr,
SkImage::BitDepth::kU8, srgbColorSpace);
matrix.postTranslate(-50, -50);
matrix.postRotate(45);
matrix.postTranslate(50, 50);
fImage1 = SkImage::MakeFromPicture(fPicture, size, &matrix, nullptr,
SkImage::BitDepth::kU8, srgbColorSpace);
}
void drawSet(SkCanvas* canvas) const {
SkMatrix matrix = SkMatrix::Translate(-100, -100);
canvas->drawPicture(fPicture, &matrix, nullptr);
canvas->drawImage(fImage0.get(), 150, 0);
canvas->drawImage(fImage1.get(), 300, 0);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(20, 20);
this->drawSet(canvas);
canvas->save();
canvas->translate(0, 130);
canvas->scale(0.25f, 0.25f);
this->drawSet(canvas);
canvas->restore();
canvas->save();
canvas->translate(0, 200);
canvas->scale(2, 2);
this->drawSet(canvas);
canvas->restore();
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ImagePictGM; )
///////////////////////////////////////////////////////////////////////////////////////////////////
static std::unique_ptr<SkImageGenerator> make_pic_generator(GrDirectContext*,
sk_sp<SkPicture> pic) {
SkMatrix matrix;
matrix.setTranslate(-100, -100);
return SkImageGenerator::MakeFromPicture({ 100, 100 }, std::move(pic), &matrix, nullptr,
SkImage::BitDepth::kU8,
SkColorSpace::MakeSRGB());
}
class RasterGenerator : public SkImageGenerator {
public:
RasterGenerator(const SkBitmap& bm) : SkImageGenerator(bm.info()), fBM(bm)
{}
protected:
bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
const Options&) override {
SkASSERT(fBM.width() == info.width());
SkASSERT(fBM.height() == info.height());
return fBM.readPixels(info, pixels, rowBytes, 0, 0);
}
private:
SkBitmap fBM;
};
static std::unique_ptr<SkImageGenerator> make_ras_generator(GrDirectContext*,
sk_sp<SkPicture> pic) {
SkBitmap bm;
bm.allocN32Pixels(100, 100);
SkCanvas canvas(bm);
canvas.clear(0);
canvas.translate(-100, -100);
canvas.drawPicture(pic);
return std::make_unique<RasterGenerator>(bm);
}
class TextureGenerator : public SkImageGenerator {
public:
TextureGenerator(GrRecordingContext* rContext, const SkImageInfo& info, sk_sp<SkPicture> pic)
: SkImageGenerator(info)
, fRContext(SkRef(rContext)) {
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(rContext, SkBudgeted::kYes, info, 0,
kTopLeft_GrSurfaceOrigin, nullptr));
if (surface) {
surface->getCanvas()->clear(0);
surface->getCanvas()->translate(-100, -100);
surface->getCanvas()->drawPicture(pic);
sk_sp<SkImage> image(surface->makeImageSnapshot());
std::tie(fView, std::ignore) = as_IB(image)->asView(rContext, GrMipmapped::kNo);
}
}
protected:
GrSurfaceProxyView onGenerateTexture(GrRecordingContext* rContext,
const SkImageInfo& info,
const SkIPoint& origin,
GrMipmapped mipMapped,
GrImageTexGenPolicy policy) override {
SkASSERT(rContext);
SkASSERT(rContext->priv().matches(fRContext.get()));
if (!fView) {
return {};
}
if (origin.fX == 0 && origin.fY == 0 && info.dimensions() == fView.proxy()->dimensions() &&
policy == GrImageTexGenPolicy::kDraw) {
return fView;
}
auto budgeted = policy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted ? SkBudgeted::kNo
: SkBudgeted::kYes;
return GrSurfaceProxyView::Copy(
fRContext.get(), fView, mipMapped,
SkIRect::MakeXYWH(origin.x(), origin.y(), info.width(), info.height()),
SkBackingFit::kExact, budgeted);
}
private:
sk_sp<GrRecordingContext> fRContext;
GrSurfaceProxyView fView;
};
static std::unique_ptr<SkImageGenerator> make_tex_generator(GrDirectContext* dContext,
sk_sp<SkPicture> pic) {
if (!dContext) {
return nullptr;
}
const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
return std::make_unique<TextureGenerator>(dContext, info, pic);
}
class ImageCacheratorGM : public skiagm::GM {
typedef std::unique_ptr<SkImageGenerator> (*FactoryFunc)(GrDirectContext*, sk_sp<SkPicture>);
SkString fName;
FactoryFunc fFactory;
sk_sp<SkPicture> fPicture;
sk_sp<SkImage> fImage;
sk_sp<SkImage> fImageSubset;
public:
ImageCacheratorGM(const char suffix[], FactoryFunc factory) : fFactory(factory) {
fName.printf("image-cacherator-from-%s", suffix);
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(960, 450);
}
void onOnceBeforeDraw() override {
const SkRect bounds = SkRect::MakeXYWH(100, 100, 100, 100);
SkPictureRecorder recorder;
draw_something(recorder.beginRecording(bounds), bounds);
fPicture = recorder.finishRecordingAsPicture();
}
bool makeCaches(GrDirectContext* dContext) {
{
auto gen = fFactory(dContext, fPicture);
if (!gen) {
return false;
}
fImage = SkImage::MakeFromGenerator(std::move(gen));
if (!fImage) {
return false;
}
SkASSERT(fImage->dimensions() == SkISize::Make(100, 100));
}
{
const SkIRect subset = SkIRect::MakeLTRB(50, 50, 100, 100);
// We re-create the generator here on the off chance that making a subset from
// 'fImage' might perturb its state.
auto gen = fFactory(dContext, fPicture);
if (!gen) {
return false;
}
fImageSubset = SkImage::MakeFromGenerator(std::move(gen))->makeSubset(subset, dContext);
if (!fImageSubset) {
return false;
}
SkASSERT(fImageSubset->dimensions() == SkISize::Make(50, 50));
}
return true;
}
static void draw_placeholder(SkCanvas* canvas, SkScalar x, SkScalar y, int w, int h) {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
SkRect r = SkRect::MakeXYWH(x, y, SkIntToScalar(w), SkIntToScalar(h));
canvas->drawRect(r, paint);
canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint);
canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint);
}
static void draw_as_bitmap(GrDirectContext* dContext, SkCanvas* canvas, SkImage* image,
SkScalar x, SkScalar y) {
SkBitmap bitmap;
if (as_IB(image)->getROPixels(dContext, &bitmap)) {
canvas->drawImage(bitmap.asImage(), x, y);
} else {
draw_placeholder(canvas, x, y, image->width(), image->height());
}
}
static void draw_as_tex(SkCanvas* canvas, SkImage* image, SkScalar x, SkScalar y) {
// The gpu-backed images are drawn in this manner bc the generator backed images
// aren't considered texture-backed
auto [view, ct] = as_IB(image)->asView(canvas->recordingContext(), GrMipmapped::kNo);
if (!view) {
// show placeholder if we have no texture
draw_placeholder(canvas, x, y, image->width(), image->height());
return;
}
SkColorInfo colorInfo(GrColorTypeToSkColorType(ct),
image->alphaType(),
image->refColorSpace());
// No API to draw a GrTexture directly, so we cheat and create a private image subclass
sk_sp<SkImage> texImage(new SkImage_Gpu(sk_ref_sp(canvas->recordingContext()),
image->uniqueID(),
std::move(view),
std::move(colorInfo)));
canvas->drawImage(texImage.get(), x, y);
}
void drawRow(GrDirectContext* dContext, SkCanvas* canvas, float scale) const {
canvas->scale(scale, scale);
SkMatrix matrix = SkMatrix::Translate(-100, -100);
canvas->drawPicture(fPicture, &matrix, nullptr);
// Draw the tex first, so it doesn't hit a lucky cache from the raster version. This
// way we also can force the generateTexture call.
draw_as_tex(canvas, fImage.get(), 150, 0);
draw_as_tex(canvas, fImageSubset.get(), 150+101, 0);
draw_as_bitmap(dContext, canvas, fImage.get(), 310, 0);
draw_as_bitmap(dContext, canvas, fImageSubset.get(), 310+101, 0);
}
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
auto dContext = GrAsDirectContext(canvas->recordingContext());
if (!this->makeCaches(dContext)) {
errorMsg->printf("Could not create cached images");
return DrawResult::kSkip;
}
canvas->save();
canvas->translate(20, 20);
this->drawRow(dContext, canvas, 1.0);
canvas->restore();
canvas->save();
canvas->translate(20, 150);
this->drawRow(dContext, canvas, 0.25f);
canvas->restore();
canvas->save();
canvas->translate(20, 220);
this->drawRow(dContext, canvas, 2.0f);
canvas->restore();
return DrawResult::kOk;
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ImageCacheratorGM("picture", make_pic_generator); )
DEF_GM( return new ImageCacheratorGM("raster", make_ras_generator); )
DEF_GM( return new ImageCacheratorGM("texture", make_tex_generator); )
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