b3ec29d2d8
git-svn-id: http://skia.googlecode.com/svn/trunk@11143 2bbb7eff-a529-9590-31e7-b0007b416f81
145 lines
5.1 KiB
C++
145 lines
5.1 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkGradientShader.h"
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#include "SkBitmapAlphaThresholdShader.h"
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#include "SkTArray.h"
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#include "SkParsePath.h"
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class BitmapAlphaThresholdGM : public skiagm::GM {
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public:
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BitmapAlphaThresholdGM() {
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this->setBGColor(0xFF000000);
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}
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private:
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virtual uint32_t onGetFlags() const SK_OVERRIDE {
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// narrow this flags when the shader has a CPU implementation and
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// when it serializes.
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return
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kSkipPDF_Flag |
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kSkipPicture_Flag |
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kSkipPipe_Flag |
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kSkipPipeCrossProcess_Flag |
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kSkipTiled_Flag |
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kSkip565_Flag |
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kSkipScaledReplay_Flag |
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kSkipPDFRasterization_Flag |
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kGPUOnly_Flag;
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}
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virtual void onOnceBeforeDraw() SK_OVERRIDE {
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fBM.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
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if (!fBM.allocPixels()) {
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return;
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}
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SkCanvas canvas(fBM);
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SkPoint pts[] = { {0, 0}, {SkIntToScalar(fBM.width()), SkIntToScalar(fBM.height())} };
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SkColor colors[] = {0x00000000, 0xffffffff};
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SkShader* grad = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
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SkShader::kClamp_TileMode);
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SkPaint gradPaint;
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gradPaint.setShader(grad)->unref();
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gradPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
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canvas.drawPaint(gradPaint);
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// Construct the region used as a mask.
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SkRegion bmpBoundsClip;
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bmpBoundsClip.setRect(0, 0, fBM.width(), fBM.height());
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SkPath circlePath;
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SkScalar radius = SkScalarSqrt(SkIntToScalar(fBM.width() * fBM.height())) / 2;
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circlePath.addCircle(SkIntToScalar(fBM.width() / 2),
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SkIntToScalar(fBM.height() / 2),
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radius);
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fMask.setPath(circlePath, bmpBoundsClip);
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SkPath batPath;
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SkParsePath::FromSVGString(
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"M305.214,374.779c2.463,0,3.45,0.493,3.45,0.493l1.478-6.241c0,0,1.15,4.763,1.643,9.034"
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"c0.493,4.271,8.048,1.479,14.454,0.164c6.405-1.314,7.72-11.662,7.72-11.662h59.294c0,0-35.807,10.841-26.772,34.656"
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"c0,0-52.889-8.048-61.101,24.967h-0.001c-8.212-33.015-61.101-24.967-61.101-24.967c9.034-23.815-26.772-34.656-26.772-34.656"
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"h59.294c0,0,1.314,10.348,7.719,11.662c6.406,1.314,13.962,4.106,14.454-0.164c0.493-4.271,1.643-9.034,1.643-9.034l1.479,6.241"
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"c0,0,0.985-0.493,3.449-0.493H305.214L305.214,374.779z",
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&batPath);
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SkMatrix matrix;
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matrix.setTranslate(-208, -280);
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matrix.postScale(radius / 100, radius / 100);
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batPath.transform(matrix, &batPath);
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SkRegion batRegion;
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batRegion.setPath(batPath, bmpBoundsClip);
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fMask.op(batRegion, SkRegion::kDifference_Op);
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}
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("bat");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(518, 735);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkTArray<SkMatrix> lms;
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lms.push_back().reset();
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lms.push_back().setScale(SK_Scalar1 / 2, SK_Scalar1);
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lms.push_back().setScale(SK_Scalar1, 2 * SK_Scalar1);
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lms.push_back().setRotate(-SK_Scalar1 * 30);
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lms.push_back().setSkew(0, SK_Scalar1 / 5);
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static const SkScalar kMargin = 5 * SK_Scalar1;
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canvas->translate(kMargin, kMargin);
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canvas->save();
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static const U8CPU kThresholds[] = { 0x0, 0x08, 0x40, 0x80, 0xC0, 0xF0, 0xFF };
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for (size_t i = 0; i < SK_ARRAY_COUNT(kThresholds); ++i) {
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for (int j = 0; j < lms.count(); ++j) {
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SkRect rect;
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rect.fLeft = 0;
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rect.fTop = 0;
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rect.fRight = SkIntToScalar(fBM.width());
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rect.fBottom = SkIntToScalar(fBM.height());
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SkShader* thresh;
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// This SkShader currently only has a GPU implementation.
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if (canvas->getDevice()->accessRenderTarget()) {
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thresh = SkBitmapAlphaThresholdShader::Create(fBM, fMask, kThresholds[i]);
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} else {
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thresh = SkShader::CreateBitmapShader(fBM, SkShader::kClamp_TileMode,
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SkShader::kClamp_TileMode);
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}
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thresh->setLocalMatrix(lms[j]);
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SkPaint paint;
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paint.setShader(thresh)->unref();
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canvas->drawRect(rect, paint);
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canvas->translate(SkIntToScalar(fBM.width() + kMargin), 0);
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}
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canvas->restore();
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canvas->translate(0, SkIntToScalar(fBM.height() + kMargin));
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canvas->save();
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}
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}
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SkBitmap fBM;
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SkRegion fMask;
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typedef skiagm::GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new BitmapAlphaThresholdGM(); )
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