skia2/gm/imagefiltersscaled.cpp
reed@google.com eb9a46cbbb add legacy/helper allocN32Pixels, and convert gm to use it
This is an intermediate api, but might help us quickly get to a point where
no one is creating bitmaps in a 2-step process (setConfig + alloc).

BUG=skia:
R=halcanary@google.com

Review URL: https://codereview.chromium.org/140593005

git-svn-id: http://skia.googlecode.com/svn/trunk@13182 2bbb7eff-a529-9590-31e7-b0007b416f81
2014-01-25 16:46:20 +00:00

151 lines
5.3 KiB
C++

/*
* Copyright 2014 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 "SkColor.h"
#include "SkBitmapSource.h"
#include "SkBlurImageFilter.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkGradientShader.h"
#include "SkMorphologyImageFilter.h"
#include "SkScalar.h"
namespace skiagm {
class ImageFiltersScaledGM : public GM {
public:
ImageFiltersScaledGM() : fInitialized(false) {
this->setBGColor(0x00000000);
}
protected:
virtual SkString onShortName() {
return SkString("imagefiltersscaled");
}
virtual SkISize onISize() {
return make_isize(860, 500);
}
void make_checkerboard() {
fCheckerboard.allocN32Pixels(64, 64);
SkBitmapDevice device(fCheckerboard);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint darkPaint;
darkPaint.setColor(0xFF404040);
SkPaint lightPaint;
lightPaint.setColor(0xFFA0A0A0);
for (int y = 0; y < 64; y += 16) {
for (int x = 0; x < 64; x += 16) {
canvas.save();
canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
canvas.restore();
}
}
}
void make_gradient_circle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = SkScalarMul(SkMinScalar(x, y), SkIntToScalar(4) / SkIntToScalar(5));
fGradientCircle.allocN32Pixels(width, height);
SkBitmapDevice device(fGradientCircle);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkColor colors[2];
colors[0] = SK_ColorWHITE;
colors[1] = SK_ColorBLACK;
SkAutoTUnref<SkShader> shader(
SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2,
SkShader::kClamp_TileMode)
);
SkPaint paint;
paint.setShader(shader);
canvas.drawCircle(x, y, radius, paint);
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
this->make_checkerboard();
this->make_gradient_circle(64, 64);
fInitialized = true;
}
canvas->clear(0x00000000);
SkAutoTUnref<SkImageFilter> gradient(new SkBitmapSource(fGradientCircle));
SkAutoTUnref<SkImageFilter> checkerboard(new SkBitmapSource(fCheckerboard));
SkImageFilter* filters[] = {
new SkBlurImageFilter(SkIntToScalar(4), SkIntToScalar(4)),
new SkDropShadowImageFilter(SkIntToScalar(5), SkIntToScalar(10), SkIntToScalar(3),
SK_ColorYELLOW),
new SkDisplacementMapEffect(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
gradient.get(),
checkerboard.get()),
new SkDilateImageFilter(1, 1, checkerboard.get()),
new SkErodeImageFilter(1, 1, checkerboard.get()),
};
SkVector scales[] = {
SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
};
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
SkScalar margin = SkIntToScalar(16);
SkRect bounds = r;
bounds.outset(margin, margin);
for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
SkPaint paint;
paint.setColor(SK_ColorBLUE);
paint.setImageFilter(filters[i]);
paint.setAntiAlias(true);
canvas->save();
canvas->scale(scales[j].fX, scales[j].fY);
canvas->clipRect(bounds);
canvas->drawCircle(r.centerX(), r.centerY(),
SkScalarDiv(r.width()*2, SkIntToScalar(5)), paint);
canvas->restore();
canvas->translate(r.width() * scales[j].fX + margin, 0);
}
canvas->restore();
canvas->translate(0, r.height() * scales[j].fY + margin);
}
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
filters[i]->unref();
}
}
private:
bool fInitialized;
SkBitmap fCheckerboard;
SkBitmap fGradientCircle;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ImageFiltersScaledGM; }
static GMRegistry reg(MyFactory);
}