skia2/gm/texteffects.cpp
2013-10-16 17:48:11 +00:00

219 lines
5.8 KiB
C++

/*
* 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 "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkFlattenableBuffers.h"
#include "SkLayerRasterizer.h"
static void r0(SkLayerRasterizer* rast, SkPaint& p) {
p.setMaskFilter(SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))))->unref();
rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
p.setMaskFilter(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rast->addLayer(p);
p.setAlpha(0x11);
p.setStyle(SkPaint::kFill_Style);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
rast->addLayer(p);
}
static void r1(SkLayerRasterizer* rast, SkPaint& p) {
rast->addLayer(p);
p.setAlpha(0x40);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*2);
rast->addLayer(p);
}
static void r2(SkLayerRasterizer* rast, SkPaint& p) {
p.setStyle(SkPaint::kStrokeAndFill_Style);
p.setStrokeWidth(SK_Scalar1*4);
rast->addLayer(p);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*3/2);
p.setXfermodeMode(SkXfermode::kClear_Mode);
rast->addLayer(p);
}
static void r3(SkLayerRasterizer* rast, SkPaint& p) {
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*3);
rast->addLayer(p);
p.setAlpha(0x20);
p.setStyle(SkPaint::kFill_Style);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
rast->addLayer(p);
}
static void r4(SkLayerRasterizer* rast, SkPaint& p) {
p.setAlpha(0x60);
rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
p.setAlpha(0xFF);
p.setXfermodeMode(SkXfermode::kClear_Mode);
rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
p.setXfermode(NULL);
rast->addLayer(p);
}
#include "SkDiscretePathEffect.h"
static void r5(SkLayerRasterizer* rast, SkPaint& p) {
rast->addLayer(p);
p.setPathEffect(new SkDiscretePathEffect(SK_Scalar1*4, SK_Scalar1*3))->unref();
p.setXfermodeMode(SkXfermode::kSrcOut_Mode);
rast->addLayer(p);
}
static void r6(SkLayerRasterizer* rast, SkPaint& p) {
rast->addLayer(p);
p.setAntiAlias(false);
SkLayerRasterizer* rast2 = new SkLayerRasterizer;
r5(rast2, p);
p.setRasterizer(rast2)->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rast->addLayer(p);
}
#include "Sk2DPathEffect.h"
static SkPathEffect* MakeDotEffect(SkScalar radius, const SkMatrix& matrix) {
SkPath path;
path.addCircle(0, 0, radius);
return new SkPath2DPathEffect(matrix, path);
}
static void r7(SkLayerRasterizer* rast, SkPaint& p) {
SkMatrix lattice;
lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
p.setPathEffect(MakeDotEffect(SK_Scalar1*4, lattice))->unref();
rast->addLayer(p);
}
static void r8(SkLayerRasterizer* rast, SkPaint& p) {
rast->addLayer(p);
SkMatrix lattice;
lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
p.setPathEffect(MakeDotEffect(SK_Scalar1*2, lattice))->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rast->addLayer(p);
p.setPathEffect(NULL);
p.setXfermode(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rast->addLayer(p);
}
static void r9(SkLayerRasterizer* rast, SkPaint& p) {
rast->addLayer(p);
SkMatrix lattice;
lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0);
lattice.postRotate(SkIntToScalar(30), 0, 0);
p.setPathEffect(new SkLine2DPathEffect(SK_Scalar1*2, lattice))->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rast->addLayer(p);
p.setPathEffect(NULL);
p.setXfermode(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rast->addLayer(p);
}
typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
static const raster_proc gRastProcs[] = {
r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
};
#include "SkXfermode.h"
static void apply_shader(SkPaint* paint, int index) {
raster_proc proc = gRastProcs[index];
if (proc)
{
SkPaint p;
SkLayerRasterizer* rast = new SkLayerRasterizer;
p.setAntiAlias(true);
proc(rast, p);
paint->setRasterizer(rast)->unref();
}
#if 0
SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 };
paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref();
#endif
paint->setColor(SK_ColorBLUE);
}
class TextEffectsGM : public skiagm::GM {
public:
TextEffectsGM() {}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("texteffects");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(460, 680);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
canvas->save();
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(56));
SkScalar x = SkIntToScalar(20);
SkScalar y = paint.getTextSize();
SkString str("Hamburgefons");
for (int i = 0; i < static_cast<int>(SK_ARRAY_COUNT(gRastProcs)); i++) {
apply_shader(&paint, i);
// paint.setMaskFilter(NULL);
// paint.setColor(SK_ColorBLACK);
canvas->drawText(str.c_str(), str.size(), x, y, paint);
y += paint.getFontSpacing();
}
canvas->restore();
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new TextEffectsGM; }
static skiagm::GMRegistry reg(MyFactory);