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skia2/gm/image.cpp

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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 "gm.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.
SkAutoDataUnref data(SkData::NewFromFileName("/Users/mike/Downloads/skia.google.jpeg"));
if (NULL == data.get()) {
return;
}
SkImage* image = SkImage::NewFromEncoded(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, NULL);
image->unref();
}
}
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);
SkImage* imgR = surf->newImageSnapshot();
if (true) {
SkImage* imgR2 = surf->newImageSnapshot();
SkASSERT(imgR == imgR2);
imgR2->unref();
}
drawContents(surf, SK_ColorGREEN);
SkImage* imgG = surf->newImageSnapshot();
// 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 : NULL);
canvas->drawImage(imgG, 0, 80, usePaint ? &paint : NULL);
surf->draw(canvas, 0, 160, usePaint ? &paint : NULL);
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 : NULL);
canvas->drawImageRect(imgG, &src2, dst2, usePaint ? &paint : NULL);
canvas->drawImageRect(imgR, &src3, dst3, usePaint ? &paint : NULL);
canvas->drawImageRect(imgG, NULL, dst4, usePaint ? &paint : NULL);
imgG->unref();
imgR->unref();
}
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);
static const char* kLabel1 = "Original Img";
static const char* kLabel2 = "Modified Img";
static const char* kLabel3 = "Cur Surface";
static const char* kLabel4 = "Full Crop";
static const char* kLabel5 = "Over-crop";
static const char* kLabel6 = "Upper-left";
static const char* kLabel7 = "No Crop";
static const char* kLabel8 = "Pre-Alloc Img";
static const char* kLabel9 = "New Alloc Img";
static const char* kLabel10 = "GPU";
SkPaint textPaint;
textPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface_always(&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);
SkAutoTUnref<SkSurface> surf0(SkSurface::NewRasterDirect(info, fBuffer, RB));
SkAutoTUnref<SkSurface> surf1(SkSurface::NewRaster(info));
SkAutoTUnref<SkSurface> surf2; // gpu
#if SK_SUPPORT_GPU
surf2.reset(SkSurface::NewRenderTarget(canvas->getGrContext(),
SkSurface::kNo_Budgeted, info));
#endif
test_surface(canvas, surf0, true);
canvas->translate(80, 0);
test_surface(canvas, surf1, true);
if (surf2) {
canvas->translate(80, 0);
test_surface(canvas, surf2, true);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImageGM; )
class ImageResizeGM : public skiagm::GM {
enum {
W = 100,
H = 100,
};
public:
ImageResizeGM() {}
protected:
SkString onShortName() override { return SkString("image-resize"); }
SkISize onISize() override { return SkISize::Make(510, 480); }
void drawIntoImage(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(3);
SkRandom rand;
for (int i = 0; i < 60; ++i) {
paint.setColor(rand.nextU());
SkScalar x = rand.nextUScalar1() * W;
SkScalar y = rand.nextUScalar1() * H;
SkScalar r = rand.nextUScalar1() * W / 2;
canvas->drawCircle(x, y, r, paint);
}
}
SkImage* makeImage(SkCanvas* canvas) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(W, H);
SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
if (!surface) {
surface.reset(SkSurface::NewRaster(info));
}
this->drawIntoImage(surface->getCanvas());
return surface->newImageSnapshot();
}
void drawResized(SkCanvas* canvas, SkImage* image, int newW, int newH, const SkIRect* subset,
SkFilterQuality fq) {
// canvas method
SkPaint paint;
paint.setFilterQuality(fq);
SkRect dstR = SkRect::MakeWH(SkIntToScalar(newW), SkIntToScalar(newH));
SkRect srcR;
if (subset) {
srcR.set(*subset);
}
canvas->drawImageRect(image, subset ? &srcR : NULL, dstR, &paint);
canvas->translate(newW + 20.0f, 0);
// image method
SkAutoTUnref<SkImage> image2(image->newImage(newW, newH, subset, fq));
canvas->drawImage(image2, 0, 0, NULL);
canvas->translate(image2->width() + 20.0f, 0);
}
void drawImage(SkCanvas* canvas, SkImage* image, SkFilterQuality fq) {
canvas->drawImage(image, 0, 0, NULL);
canvas->translate(image->width() + 20.0f, 0);
this->drawResized(canvas, image, image->width()*4/10, image->height()*4/10, NULL, fq);
SkIRect subset = SkIRect::MakeLTRB(W/4, H/4, W/2, H/2);
this->drawResized(canvas, image, W, H, &subset, fq);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(10, 10);
SkAutoTUnref<SkImage> image(this->makeImage(canvas));
const SkFilterQuality fq[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality,
};
for (size_t i = 0; i < SK_ARRAY_COUNT(fq); ++i) {
{
SkAutoCanvasRestore acr(canvas, true);
this->drawImage(canvas, image, fq[i]);
}
canvas->translate(0, image->height() + 20.0f);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImageResizeGM; )
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