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/*
* 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 "SkDevice.h"
#include "SkBitmapSource.h"
#include "SkBlurImageFilter.h"
#include "SkColorFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkMergeImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkTestImageFilters.h"
#include "SkXfermodeImageFilter.h"
// 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:
class Registrar {
public:
Registrar() {
SkFlattenable::Register("SimpleOffsetFilter",
SimpleOffsetFilter::CreateProc,
SimpleOffsetFilter::GetFlattenableType());
}
};
static SkImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input) {
return new SimpleOffsetFilter(dx, dy, input);
}
virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const Context& ctx,
SkBitmap* dst, SkIPoint* offset) const override {
SkBitmap source = src;
SkImageFilter* input = getInput(0);
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (input && !input->filterImage(proxy, src, ctx, &source, &srcOffset)) {
return false;
}
SkIRect bounds;
if (!this->applyCropRect(ctx, proxy, source, &srcOffset, &bounds, &source)) {
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_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SimpleOffsetFilter);
protected:
void flatten(SkWriteBuffer& buffer) const override {
this->INHERITED::flatten(buffer);
buffer.writeScalar(fDX);
buffer.writeScalar(fDY);
}
private:
SimpleOffsetFilter(SkScalar dx, SkScalar dy, SkImageFilter* input)
: SkImageFilter(1, &input), fDX(dx), fDY(dy) {}
SkScalar fDX, fDY;
typedef SkImageFilter INHERITED;
};
static SimpleOffsetFilter::Registrar gReg;
SkFlattenable* SimpleOffsetFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
SkScalar dx = buffer.readScalar();
SkScalar dy = buffer.readScalar();
return Create(dx, dy, common.getInput(0));
}
#ifndef SK_IGNORE_TO_STRING
void SimpleOffsetFilter::toString(SkString* str) const {
str->appendf("SimpleOffsetFilter: (");
str->append(")");
}
#endif
class ImageFiltersGraphGM : public skiagm::GM {
public:
ImageFiltersGraphGM() {}
protected:
virtual SkString onShortName() {
return SkString("imagefiltersgraph");
}
void make_bitmap() {
fBitmap.allocN32Pixels(100, 100);
SkCanvas canvas(fBitmap);
canvas.clear(SK_ColorTRANSPARENT);
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(SK_ColorWHITE);
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 onOnceBeforeDraw() {
this->make_bitmap();
}
virtual void onDraw(SkCanvas* canvas) {
canvas->clear(SK_ColorBLACK);
{
SkAutoTUnref<SkImageFilter> bitmapSource(SkBitmapSource::Create(fBitmap));
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED,
SkXfermode::kSrcIn_Mode));
SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(4.0f, 4.0f, bitmapSource));
SkAutoTUnref<SkImageFilter> erode(SkErodeImageFilter::Create(4, 4, blur));
SkAutoTUnref<SkImageFilter> color(SkColorFilterImageFilter::Create(cf, erode));
SkAutoTUnref<SkImageFilter> merge(SkMergeImageFilter::Create(blur, color));
SkPaint paint;
paint.setImageFilter(merge);
canvas->drawPaint(paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkAutoTUnref<SkImageFilter> morph(SkDilateImageFilter::Create(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, 0.5f, 0 };
SkAutoTUnref<SkColorFilter> matrixFilter(SkColorMatrixFilter::Create(matrix));
SkAutoTUnref<SkImageFilter> colorMorph(SkColorFilterImageFilter::Create(matrixFilter, morph));
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
SkAutoTUnref<SkImageFilter> blendColor(SkXfermodeImageFilter::Create(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, 0.5f, 0 };
SkAutoTUnref<SkColorMatrixFilter> matrixCF(SkColorMatrixFilter::Create(matrix));
SkAutoTUnref<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Create(matrixCF));
SkAutoTUnref<SkImageFilter> offsetFilter(
SimpleOffsetFilter::Create(10.0f, 10.f, matrixFilter));
SkAutoTUnref<SkXfermode> arith(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
SkAutoTUnref<SkXfermodeImageFilter> arithFilter(
SkXfermodeImageFilter::Create(arith, matrixFilter, offsetFilter));
SkPaint paint;
paint.setImageFilter(arithFilter);
drawClippedBitmap(canvas, fBitmap, paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(
SkIntToScalar(10), SkIntToScalar(10)));
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcIn_Mode));
SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100)));
SkAutoTUnref<SkImageFilter> blend(
SkXfermodeImageFilter::Create(mode, blur, NULL, &cropRect));
SkPaint paint;
paint.setImageFilter(blend);
drawClippedBitmap(canvas, fBitmap, paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
// Test that crop offsets are absolute, not relative to the parent's crop rect.
SkAutoTUnref<SkColorFilter> cf1(SkColorFilter::CreateModeFilter(SK_ColorBLUE,
SkXfermode::kSrcIn_Mode));
SkAutoTUnref<SkColorFilter> cf2(SkColorFilter::CreateModeFilter(SK_ColorGREEN,
SkXfermode::kSrcIn_Mode));
SkImageFilter::CropRect outerRect(SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(80), SkIntToScalar(80)));
SkImageFilter::CropRect innerRect(SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20),
SkIntToScalar(60), SkIntToScalar(60)));
SkAutoTUnref<SkImageFilter> color1(SkColorFilterImageFilter::Create(cf1, NULL, &outerRect));
SkAutoTUnref<SkImageFilter> color2(SkColorFilterImageFilter::Create(cf2, color1, &innerRect));
SkPaint paint;
paint.setImageFilter(color2);
paint.setColor(SK_ColorRED);
canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), paint);
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
typedef GM INHERITED;
SkBitmap fBitmap;
};
///////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
static skiagm::GMRegistry reg(MyFactory);
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