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skia2/gm/image.cpp
reed 6868c3fccf optimize the disable-caching case for SkImage::readPixels 
If the client wants no caching, and we haven't already cached it, pass the
caller's dst-buffer directly down to the generator, avoiding the (previous)
extra memcpy.

BUG=skia:4594

Review URL: https://codereview.chromium.org/1473373002
2015-11-24 11:44:47 -08:00

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9.4 KiB
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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 (nullptr == 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, nullptr);
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 : 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);
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(&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; )
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkPictureRecorder.h"
static void draw_pixmap(SkCanvas* canvas, const SkPixmap& pmap) {
SkBitmap bitmap;
bitmap.installPixels(pmap.info(), (void*)pmap.addr(), pmap.rowBytes());
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 SkImage* make_raster(const SkImageInfo& info, GrContext*) {
SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
draw_contents(surface->getCanvas());
return surface->newImageSnapshot();
}
static SkImage* make_picture(const SkImageInfo& info, GrContext*) {
SkPictureRecorder recorder;
draw_contents(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.height())));
SkAutoTUnref<SkPicture> pict(recorder.endRecording());
return SkImage::NewFromPicture(pict, info.dimensions(), nullptr, nullptr);
}
static SkImage* make_codec(const SkImageInfo& info, GrContext*) {
SkAutoTUnref<SkImage> image(make_raster(info, nullptr));
SkAutoTUnref<SkData> data(image->encode());
return SkImage::NewFromEncoded(data);
}
static SkImage* make_gpu(const SkImageInfo& info, GrContext* ctx) {
if (!ctx) { return nullptr; }
SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgeted, info));
draw_contents(surface->getCanvas());
return surface->newImageSnapshot();
}
typedef SkImage* (*ImageMakerProc)(const SkImageInfo&, GrContext*);
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) {
SkAutoTUnref<SkImage> image(proc(info, canvas->getGrContext()));
if (image) {
show_scaled_pixels(canvas, image);
}
canvas->translate(0, 120);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new ScalePixelsGM; )
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