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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 "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkUnitMappers.h"
namespace skiagm {
static void makebm(SkBitmap* bm, int w, int h) {
bm->allocN32Pixels(w, h);
bm->eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(*bm);
SkScalar s = SkIntToScalar(SkMin32(w, h));
static const SkPoint kPts0[] = { { 0, 0 }, { s, s } };
static const SkPoint kPts1[] = { { s/2, 0 }, { s/2, s } };
static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
static const SkColor kColors0[] = {0x80F00080, 0xF0F08000, 0x800080F0 };
static const SkColor kColors1[] = {0xF08000F0, 0x8080F000, 0xF000F080 };
SkPaint paint;
SkUnitMapper* um = NULL;
um = new SkCosineMapper;
SkAutoUnref au(um);
paint.setShader(SkGradientShader::CreateLinear(kPts0, kColors0, kPos,
SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode, um))->unref();
canvas.drawPaint(paint);
paint.setShader(SkGradientShader::CreateLinear(kPts1, kColors1, kPos,
SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode))->unref();
canvas.drawPaint(paint);
}
///////////////////////////////////////////////////////////////////////////////
struct LabeledMatrix {
SkMatrix fMatrix;
const char* fLabel;
};
static const char kText[] = "B";
static const int kTextLen = SK_ARRAY_COUNT(kText) - 1;
static const int kPointSize = 300;
class ShaderText3GM : public GM {
public:
ShaderText3GM() {
this->setBGColor(0xFFDDDDDD);
}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("shadertext3");
}
virtual SkISize onISize() SK_OVERRIDE{ return make_isize(800, 1000); }
virtual void onOnceBeforeDraw() SK_OVERRIDE {
makebm(&fBmp, kPointSize / 4, kPointSize / 4);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkPaint bmpPaint;
bmpPaint.setAntiAlias(true);
bmpPaint.setFilterLevel(SkPaint::kLow_FilterLevel);
bmpPaint.setAlpha(0x80);
canvas->drawBitmap(fBmp, 5.f, 5.f, &bmpPaint);
SkPaint outlinePaint;
outlinePaint.setAntiAlias(true);
outlinePaint.setTextSize(SkIntToScalar(kPointSize));
outlinePaint.setStyle(SkPaint::kStroke_Style);
outlinePaint.setStrokeWidth(0.f);
canvas->translate(15.f, 15.f);
// draw glyphs scaled up
canvas->scale(2.f, 2.f);
static const SkShader::TileMode kTileModes[] = {
SkShader::kRepeat_TileMode,
SkShader::kMirror_TileMode,
};
// position the baseline of the first run
canvas->translate(0.f, 0.75f * kPointSize);
canvas->save();
int i = 0;
for (size_t tm0 = 0; tm0 < SK_ARRAY_COUNT(kTileModes); ++tm0) {
for (size_t tm1 = 0; tm1 < SK_ARRAY_COUNT(kTileModes); ++tm1) {
SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(fBmp,
kTileModes[tm0],
kTileModes[tm1]));
SkMatrix localM;
localM.setTranslate(5.f, 5.f);
localM.postRotate(20);
localM.postScale(1.15f, .85f);
shader->setLocalMatrix(localM);
SkPaint fillPaint;
fillPaint.setAntiAlias(true);
fillPaint.setTextSize(SkIntToScalar(kPointSize));
fillPaint.setFilterLevel(SkPaint::kLow_FilterLevel);
fillPaint.setShader(shader);
canvas->drawText(kText, kTextLen, 0, 0, fillPaint);
canvas->drawText(kText, kTextLen, 0, 0, outlinePaint);
SkScalar w = fillPaint.measureText(kText, kTextLen);
canvas->translate(w + 10.f, 0.f);
++i;
if (!(i % 2)) {
canvas->restore();
canvas->translate(0, 0.75f * kPointSize);
canvas->save();
}
}
}
canvas->restore();
}
private:
SkBitmap fBmp;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ShaderText3GM; }
static GMRegistry reg(MyFactory);
}
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