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skia2/gm/image.cpp
Matt Sarett e94255d456 Specify bit depth and color space in SkImage::MakeFromPicture() 
BUG=skia:

Change-Id: I1d2a2b1f97557fc3e7ca6c2bdad6329f7760dbd2
Reviewed-on: https://skia-review.googlesource.com/6685
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2017-01-09 18:14:06 +00:00

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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <functional>
#include "gm.h"
#include "SkAutoPixmapStorage.h"
#include "SkData.h"
#include "SkCanvas.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "SkSurface.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#endif
static void drawJpeg(SkCanvas* canvas, const SkISize& size) {
// TODO: Make this draw a file that is checked in, so it can
// be exercised on machines other than mike's. Will require a
// rebaseline.
sk_sp<SkData> data(SkData::MakeFromFileName("/Users/mike/Downloads/skia.google.jpeg"));
if (nullptr == data) {
return;
}
sk_sp<SkImage> image = SkImage::MakeFromEncoded(std::move(data));
if (image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->scale(size.width() * 1.0f / image->width(),
size.height() * 1.0f / image->height());
canvas->drawImage(image, 0, 0, nullptr);
}
}
static void drawContents(SkSurface* surface, SkColor fillC) {
SkSize size = SkSize::Make(SkIntToScalar(surface->width()),
SkIntToScalar(surface->height()));
SkCanvas* canvas = surface->getCanvas();
SkScalar stroke = size.fWidth / 10;
SkScalar radius = (size.fWidth - stroke) / 2;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(fillC);
canvas->drawCircle(size.fWidth/2, size.fHeight/2, radius, paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(stroke);
paint.setColor(SK_ColorBLACK);
canvas->drawCircle(size.fWidth/2, size.fHeight/2, radius, paint);
}
static void test_surface(SkCanvas* canvas, SkSurface* surf, bool usePaint) {
drawContents(surf, SK_ColorRED);
sk_sp<SkImage> imgR = surf->makeImageSnapshot();
if (true) {
sk_sp<SkImage> imgR2 = surf->makeImageSnapshot();
SkASSERT(imgR == imgR2);
}
drawContents(surf, SK_ColorGREEN);
sk_sp<SkImage> imgG = surf->makeImageSnapshot();
// since we've drawn after we snapped imgR, imgG will be a different obj
SkASSERT(imgR != imgG);
drawContents(surf, SK_ColorBLUE);
SkPaint paint;
// paint.setFilterBitmap(true);
// paint.setAlpha(0x80);
canvas->drawImage(imgR, 0, 0, usePaint ? &paint : nullptr);
canvas->drawImage(imgG, 0, 80, usePaint ? &paint : nullptr);
surf->draw(canvas, 0, 160, usePaint ? &paint : nullptr);
SkRect src1, src2, src3;
src1.iset(0, 0, surf->width(), surf->height());
src2.iset(-surf->width() / 2, -surf->height() / 2,
surf->width(), surf->height());
src3.iset(0, 0, surf->width() / 2, surf->height() / 2);
SkRect dst1, dst2, dst3, dst4;
dst1.set(0, 240, 65, 305);
dst2.set(0, 320, 65, 385);
dst3.set(0, 400, 65, 465);
dst4.set(0, 480, 65, 545);
canvas->drawImageRect(imgR, src1, dst1, usePaint ? &paint : nullptr);
canvas->drawImageRect(imgG, src2, dst2, usePaint ? &paint : nullptr);
canvas->drawImageRect(imgR, src3, dst3, usePaint ? &paint : nullptr);
canvas->drawImageRect(imgG, dst4, usePaint ? &paint : nullptr);
}
class ImageGM : public skiagm::GM {
void* fBuffer;
size_t fBufferSize;
SkSize fSize;
enum {
W = 64,
H = 64,
RB = W * 4 + 8,
};
public:
ImageGM() {
fBufferSize = RB * H;
fBuffer = sk_malloc_throw(fBufferSize);
fSize.set(SkIntToScalar(W), SkIntToScalar(H));
}
virtual ~ImageGM() {
sk_free(fBuffer);
}
protected:
SkString onShortName() override {
return SkString("image-surface");
}
SkISize onISize() override {
return SkISize::Make(960, 1200);
}
void onDraw(SkCanvas* canvas) override {
drawJpeg(canvas, this->getISize());
canvas->scale(2, 2);
const char* kLabel1 = "Original Img";
const char* kLabel2 = "Modified Img";
const char* kLabel3 = "Cur Surface";
const char* kLabel4 = "Full Crop";
const char* kLabel5 = "Over-crop";
const char* kLabel6 = "Upper-left";
const char* kLabel7 = "No Crop";
const char* kLabel8 = "Pre-Alloc Img";
const char* kLabel9 = "New Alloc Img";
const char* kLabel10 = "GPU";
SkPaint textPaint;
textPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&textPaint);
textPaint.setTextSize(8);
canvas->drawText(kLabel1, strlen(kLabel1), 10, 60, textPaint);
canvas->drawText(kLabel2, strlen(kLabel2), 10, 140, textPaint);
canvas->drawText(kLabel3, strlen(kLabel3), 10, 220, textPaint);
canvas->drawText(kLabel4, strlen(kLabel4), 10, 300, textPaint);
canvas->drawText(kLabel5, strlen(kLabel5), 10, 380, textPaint);
canvas->drawText(kLabel6, strlen(kLabel6), 10, 460, textPaint);
canvas->drawText(kLabel7, strlen(kLabel7), 10, 540, textPaint);
canvas->drawText(kLabel8, strlen(kLabel8), 80, 10, textPaint);
canvas->drawText(kLabel9, strlen(kLabel9), 160, 10, textPaint);
canvas->drawText(kLabel10, strlen(kLabel10), 265, 10, textPaint);
canvas->translate(80, 20);
// since we draw into this directly, we need to start fresh
sk_bzero(fBuffer, fBufferSize);
SkImageInfo info = SkImageInfo::MakeN32Premul(W, H);
sk_sp<SkSurface> surf0(SkSurface::MakeRasterDirect(info, fBuffer, RB));
sk_sp<SkSurface> surf1(SkSurface::MakeRaster(info));
sk_sp<SkSurface> surf2; // gpu
#if SK_SUPPORT_GPU
surf2 = SkSurface::MakeRenderTarget(canvas->getGrContext(), SkBudgeted::kNo, info);
#endif
test_surface(canvas, surf0.get(), true);
canvas->translate(80, 0);
test_surface(canvas, surf1.get(), true);
if (surf2) {
canvas->translate(80, 0);
test_surface(canvas, surf2.get(), true);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImageGM; )
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkPictureRecorder.h"
static void draw_pixmap(SkCanvas* canvas, const SkPixmap& pmap) {
SkBitmap bitmap;
bitmap.installPixels(pmap);
canvas->drawBitmap(bitmap, 0, 0, nullptr);
}
static void show_scaled_pixels(SkCanvas* canvas, SkImage* image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->drawImage(image, 0, 0, nullptr);
canvas->translate(110, 10);
const SkImageInfo info = SkImageInfo::MakeN32Premul(40, 40);
SkAutoPixmapStorage storage;
storage.alloc(info);
const SkImage::CachingHint chints[] = {
SkImage::kAllow_CachingHint, SkImage::kDisallow_CachingHint,
};
const SkFilterQuality qualities[] = {
kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality, kHigh_SkFilterQuality,
};
for (auto ch : chints) {
canvas->save();
for (auto q : qualities) {
if (image->scalePixels(storage, q, ch)) {
draw_pixmap(canvas, storage);
}
canvas->translate(70, 0);
}
canvas->restore();
canvas->translate(0, 45);
}
}
static void draw_contents(SkCanvas* canvas) {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(20);
canvas->drawCircle(50, 50, 35, paint);
}
static sk_sp<SkImage> make_raster(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
auto surface(SkSurface::MakeRaster(info));
draw(surface->getCanvas());
return surface->makeImageSnapshot();
}
static sk_sp<SkImage> make_picture(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
SkPictureRecorder recorder;
draw(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.height())));
return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
info.dimensions(), nullptr, nullptr, SkImage::BitDepth::kU8,
SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named));
}
static sk_sp<SkImage> make_codec(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
sk_sp<SkImage> image(make_raster(info, nullptr, draw));
sk_sp<SkData> data(image->encode());
return SkImage::MakeFromEncoded(data);
}
static sk_sp<SkImage> make_gpu(const SkImageInfo& info, GrContext* ctx, void (*draw)(SkCanvas*)) {
if (!ctx) { return nullptr; }
auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
if (!surface) { return nullptr; }
draw(surface->getCanvas());
return surface->makeImageSnapshot();
}
typedef sk_sp<SkImage> (*ImageMakerProc)(const SkImageInfo&, GrContext*, void (*)(SkCanvas*));
class ScalePixelsGM : public skiagm::GM {
public:
ScalePixelsGM() {}
protected:
SkString onShortName() override {
return SkString("scale-pixels");
}
SkISize onISize() override {
return SkISize::Make(960, 1200);
}
void onDraw(SkCanvas* canvas) override {
const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
const ImageMakerProc procs[] = {
make_codec, make_raster, make_picture, make_codec, make_gpu,
};
for (auto& proc : procs) {
sk_sp<SkImage> image(proc(info, canvas->getGrContext(), draw_contents));
if (image) {
show_scaled_pixels(canvas, image.get());
}
canvas->translate(0, 120);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ScalePixelsGM; )
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkImageGenerator.h"
static SkImageInfo make_info(SkImage* img) {
return SkImageInfo::MakeN32(img->width(), img->height(), img->alphaType());
}
// Its simple, but I wonder if we should expose this formally?
//
class ImageGeneratorFromImage : public SkImageGenerator {
public:
ImageGeneratorFromImage(SkImage* img) : INHERITED(make_info(img)), fImg(SkRef(img)) {}
protected:
bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor ctable[],
int* ctableCount) override {
return fImg->readPixels(info, pixels, rowBytes, 0, 0);
}
private:
sk_sp<SkImage> fImg;
typedef SkImageGenerator INHERITED;
};
static void draw_opaque_contents(SkCanvas* canvas) {
canvas->drawColor(0xFFFF8844);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(20);
canvas->drawCircle(50, 50, 35, paint);
}
static SkImageGenerator* gen_raster(const SkImageInfo& info) {
auto surface(SkSurface::MakeRaster(info));
draw_opaque_contents(surface->getCanvas());
return new ImageGeneratorFromImage(surface->makeImageSnapshot().get());
}
static SkImageGenerator* gen_picture(const SkImageInfo& info) {
SkPictureRecorder recorder;
draw_opaque_contents(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.height())));
sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());
return SkImageGenerator::NewFromPicture(info.dimensions(), pict.get(), nullptr, nullptr,
SkImage::BitDepth::kU8,
SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named));
}
static SkImageGenerator* gen_png(const SkImageInfo& info) {
sk_sp<SkImage> image(make_raster(info, nullptr, draw_opaque_contents));
sk_sp<SkData> data(image->encode(SkEncodedImageFormat::kPNG, 100));
return SkImageGenerator::NewFromEncoded(data.get());
}
static SkImageGenerator* gen_jpg(const SkImageInfo& info) {
sk_sp<SkImage> image(make_raster(info, nullptr, draw_opaque_contents));
sk_sp<SkData> data(image->encode(SkEncodedImageFormat::kJPEG, 100));
return SkImageGenerator::NewFromEncoded(data.get());
}
typedef SkImageGenerator* (*GeneratorMakerProc)(const SkImageInfo&);
static void show_scaled_generator(SkCanvas* canvas, SkImageGenerator* gen) {
const SkImageInfo genInfo = gen->getInfo();
SkAutoCanvasRestore acr(canvas, true);
SkBitmap bm;
bm.allocPixels(genInfo);
if (gen->getPixels(bm.info(), bm.getPixels(), bm.rowBytes())) {
canvas->drawBitmap(bm, 0, 0, nullptr);
}
canvas->translate(110, 0);
const float scales[] = { 0.75f, 0.5f, 0.25f };
for (auto scale : scales) {
SkImageGenerator::SupportedSizes sizes;
if (gen->computeScaledDimensions(scale, &sizes)) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(sizes.fSizes[0].width(),
sizes.fSizes[0].height());
bm.allocPixels(info);
SkPixmap pmap;
bm.peekPixels(&pmap);
if (gen->generateScaledPixels(pmap)) {
canvas->drawBitmap(bm, 0, SkIntToScalar(genInfo.height() - info.height())/2);
}
}
canvas->translate(100, 0);
}
}
class ScaleGeneratorGM : public skiagm::GM {
public:
ScaleGeneratorGM() {}
protected:
SkString onShortName() override {
return SkString("scale-generator");
}
SkISize onISize() override {
return SkISize::Make(500, 500);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(10, 10);
// explicitly make it opaque, so we can test JPEG (which is only ever opaque)
const SkImageInfo info = SkImageInfo::MakeN32(100, 100, kOpaque_SkAlphaType);
const GeneratorMakerProc procs[] = {
gen_raster, gen_picture, gen_png, gen_jpg,
};
for (auto& proc : procs) {
std::unique_ptr<SkImageGenerator> gen(proc(info));
if (gen) {
show_scaled_generator(canvas, gen.get());
}
canvas->translate(0, 120);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ScaleGeneratorGM; )
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