skia2/gm/imagefiltersgraph.cpp
2013-10-24 15:59:31 +00:00

202 lines
7.3 KiB
C++

/*
* Copyright 2012 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 "SkArithmeticMode.h"
#include "SkBitmapSource.h"
#include "SkBlurImageFilter.h"
#include "SkColorFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkFlattenableBuffers.h"
#include "SkMergeImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkOnce.h"
#include "SkXfermodeImageFilter.h"
#include "SkTestImageFilters.h"
///////////////////////////////////////////////////////////////////////////////
namespace {
// More closely models how Blink's OffsetFilter works as of 10/23/13. SkOffsetImageFilter doesn't
// perform a draw and this one does.
class SimpleOffsetFilter : public SkImageFilter {
public:
SimpleOffsetFilter(SkScalar dx, SkScalar dy, SkImageFilter* input)
: SkImageFilter(input), fDX(dx), fDY(dy) {}
virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
SkBitmap* dst, SkIPoint* offset) SK_OVERRIDE {
SkBitmap source = src;
SkImageFilter* input = getInput(0);
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (NULL != input && !input->filterImage(proxy, src, ctm, &source, &srcOffset)) {
return false;
}
SkIRect bounds;
source.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
SkCanvas canvas(device);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawBitmap(source, fDX - bounds.left(), fDY - bounds.top(), &paint);
*dst = device->accessBitmap(false);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SimpleOffsetFilter);
protected:
explicit SimpleOffsetFilter(SkFlattenableReadBuffer& buffer)
: SkImageFilter(buffer) {
fDX = buffer.readScalar();
fDY = buffer.readScalar();
}
virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE {
this->SkImageFilter::flatten(buffer);
buffer.writeScalar(fDX);
buffer.writeScalar(fDY);
}
private:
SkScalar fDX, fDY;
};
}
static void init_flattenable(int*) {
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SimpleOffsetFilter)
}
class ImageFiltersGraphGM : public skiagm::GM {
public:
ImageFiltersGraphGM() : fInitialized(false) {
int dummy;
SK_DECLARE_STATIC_ONCE(once);
SkOnce(&once, init_flattenable, &dummy);
}
protected:
virtual SkString onShortName() {
return SkString("imagefiltersgraph");
}
void make_bitmap() {
fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
fBitmap.allocPixels();
SkBitmapDevice device(fBitmap);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xFFFFFFFF);
paint.setTextSize(SkIntToScalar(96));
const char* str = "e";
canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
}
void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint) {
canvas->save();
canvas->clipRect(SkRect::MakeXYWH(0, 0,
SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())));
canvas->drawBitmap(bitmap, 0, 0, &paint);
canvas->restore();
}
virtual SkISize onISize() { return SkISize::Make(500, 150); }
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
this->make_bitmap();
fInitialized = true;
}
canvas->clear(0x00000000);
{
SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED,
SkXfermode::kSrcIn_Mode));
SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(4.0f, 4.0f, bitmapSource));
SkAutoTUnref<SkImageFilter> erode(new SkErodeImageFilter(4, 4, blur));
SkAutoTUnref<SkImageFilter> color(SkColorFilterImageFilter::Create(cf, erode));
SkAutoTUnref<SkImageFilter> merge(new SkMergeImageFilter(blur, color));
SkPaint paint;
paint.setImageFilter(merge);
canvas->drawPaint(paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkAutoTUnref<SkImageFilter> morph(new SkDilateImageFilter(5, 5));
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, SkFloatToScalar(0.5f), 0 };
SkAutoTUnref<SkColorFilter> matrixFilter(new SkColorMatrixFilter(matrix));
SkAutoTUnref<SkImageFilter> colorMorph(SkColorFilterImageFilter::Create(matrixFilter, morph));
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
SkAutoTUnref<SkImageFilter> blendColor(new SkXfermodeImageFilter(mode, colorMorph));
SkPaint paint;
paint.setImageFilter(blendColor);
drawClippedBitmap(canvas, fBitmap, paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, SkFloatToScalar(0.5f), 0 };
SkColorMatrixFilter matrixCF(matrix);
SkAutoTUnref<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Create(&matrixCF));
SimpleOffsetFilter offsetFilter(SkIntToScalar(10), SkIntToScalar(10), matrixFilter);
SkAutoTUnref<SkXfermode> arith(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
SkXfermodeImageFilter arithFilter(arith, matrixFilter, &offsetFilter);
SkPaint paint;
paint.setImageFilter(&arithFilter);
drawClippedBitmap(canvas, fBitmap, paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(
SkIntToScalar(10), SkIntToScalar(10)));
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcIn_Mode));
SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100)));
SkAutoTUnref<SkImageFilter> blend(new SkXfermodeImageFilter(mode, blur, NULL, &cropRect));
SkPaint paint;
paint.setImageFilter(blend);
drawClippedBitmap(canvas, fBitmap, paint);
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
typedef GM INHERITED;
SkBitmap fBitmap;
bool fInitialized;
};
///////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
static skiagm::GMRegistry reg(MyFactory);