skia2/gm/image_pict.cpp
Brian Salomon ecbb0fb2d5 Simplify view getters on GrTextureProducer.
The only thing that affects the view returned is whether it ought to
be MIP mapped or not. So don't take a whole GrSamplerState.

The view() function won't ever change the colortype so just query
GrTextureProducer rather than having view() return a tuple.

The rest is transitively reaching through callers and callees of
GrTextureProducer::view() to only pass filter or GrMipMapped instead of
GrSamplerState. Also, some params that indicate whether MIPs are
requested are changed from bool to GrMipMapped. And some minor style
stuff (mainly de-yoda-ifying GrMipMapped checks, using
GrSurfaceProxyView operator bool()).

Change-Id: Ia184aa793cf51d42642ea3bb0521ce06da2efb10
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274205
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2020-03-01 00:32:04 +00:00

334 lines
11 KiB
C++

/*
* 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/GrContext.h"
#include "include/gpu/GrTypes.h"
#include "include/private/GrTypesPriv.h"
#include "src/gpu/GrContextPriv.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::MakeTrans(-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:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImagePictGM; )
///////////////////////////////////////////////////////////////////////////////////////////////////
static std::unique_ptr<SkImageGenerator> make_pic_generator(GrContext*, 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(GrContext*, 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 EmptyGenerator : public SkImageGenerator {
public:
EmptyGenerator(const SkImageInfo& info) : SkImageGenerator(info) {}
};
class TextureGenerator : public SkImageGenerator {
public:
TextureGenerator(GrContext* ctx, const SkImageInfo& info, sk_sp<SkPicture> pic)
: SkImageGenerator(info)
, fCtx(SkRef(ctx)) {
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctx, 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());
const GrSurfaceProxyView* view = as_IB(image)->view(fCtx.get());
if (view) {
fView = *view;
}
}
}
protected:
GrSurfaceProxyView onGenerateTexture(GrRecordingContext* ctx, const SkImageInfo& info,
const SkIPoint& origin, GrMipMapped mipMapped) override {
SkASSERT(ctx);
SkASSERT(ctx == fCtx.get());
if (!fView) {
return {};
}
if (origin.fX == 0 && origin.fY == 0 && info.dimensions() == fView.proxy()->dimensions()) {
return fView;
}
// TODO: When we update this function to return a view instead of just a proxy then we can
// remove the extra ref that happens when we call asTextureProxyRef.
return GrSurfaceProxy::Copy(
fCtx.get(), fView.proxy(), fView.origin(),
SkColorTypeToGrColorType(info.colorType()), mipMapped,
SkIRect::MakeXYWH(origin.x(), origin.y(), info.width(), info.height()),
SkBackingFit::kExact, SkBudgeted::kYes);
}
private:
sk_sp<GrContext> fCtx;
GrSurfaceProxyView fView;
};
static std::unique_ptr<SkImageGenerator> make_tex_generator(GrContext* ctx, sk_sp<SkPicture> pic) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
if (!ctx) {
return std::make_unique<EmptyGenerator>(info);
}
return std::make_unique<TextureGenerator>(ctx, info, pic);
}
class ImageCacheratorGM : public skiagm::GM {
SkString fName;
std::unique_ptr<SkImageGenerator> (*fFactory)(GrContext*, sk_sp<SkPicture>);
sk_sp<SkPicture> fPicture;
sk_sp<SkImage> fImage;
sk_sp<SkImage> fImageSubset;
public:
ImageCacheratorGM(const char suffix[],
std::unique_ptr<SkImageGenerator> (*factory)(GrContext*, sk_sp<SkPicture>))
: 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();
}
void makeCaches(GrContext* ctx) {
auto gen = fFactory(ctx, fPicture);
fImage = SkImage::MakeFromGenerator(std::move(gen));
const SkIRect subset = SkIRect::MakeLTRB(50, 50, 100, 100);
gen = fFactory(ctx, fPicture);
fImageSubset = SkImage::MakeFromGenerator(std::move(gen), &subset);
SkASSERT(fImage->dimensions() == SkISize::Make(100, 100));
SkASSERT(fImageSubset->dimensions() == SkISize::Make(50, 50));
}
static void draw_as_bitmap(SkCanvas* canvas, SkImage* image, SkScalar x, SkScalar y) {
SkBitmap bitmap;
as_IB(image)->getROPixels(&bitmap);
canvas->drawBitmap(bitmap, x, y);
}
static void draw_as_tex(SkCanvas* canvas, SkImage* image, SkScalar x, SkScalar y) {
GrSurfaceProxyView view = as_IB(image)->refView(canvas->getGrContext(), GrMipMapped::kNo);
if (!view) {
// show placeholder if we have no texture
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
SkRect r = SkRect::MakeXYWH(x, y, SkIntToScalar(image->width()),
SkIntToScalar(image->width()));
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);
return;
}
// 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->getGrContext()),
image->uniqueID(), std::move(view),
image->colorType(), image->alphaType(),
image->refColorSpace()));
canvas->drawImage(texImage.get(), x, y);
}
void drawSet(SkCanvas* canvas) const {
SkMatrix matrix = SkMatrix::MakeTrans(-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(), 310, 0);
draw_as_tex(canvas, fImageSubset.get(), 310+101, 0);
draw_as_bitmap(canvas, fImage.get(), 150, 0);
draw_as_bitmap(canvas, fImageSubset.get(), 150+101, 0);
}
void onDraw(SkCanvas* canvas) override {
this->makeCaches(canvas->getGrContext());
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:
typedef skiagm::GM INHERITED;
};
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); )