зеркало из https://github.com/mozilla/moz-skia.git
142 строки
3.6 KiB
C++
142 строки
3.6 KiB
C++
/*
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* Copyright 2011 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 "SkColorMatrixFilter.h"
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#define WIDTH 500
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#define HEIGHT 500
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class SkOnce {
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public:
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SkOnce() : fOnce(false) {};
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bool once() const {
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if (fOnce) {
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return false;
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}
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fOnce = true;
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return true;
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}
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private:
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mutable bool fOnce;
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};
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namespace skiagm {
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class ColorMatrixGM : public GM {
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SkOnce fOnce;
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void init() {
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if (fOnce.once()) {
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fBitmap = createBitmap(64, 64);
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}
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}
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public:
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ColorMatrixGM() {
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this->setBGColor(0xFF808080);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("colormatrix");
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}
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virtual SkISize onISize() {
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return make_isize(WIDTH, HEIGHT);
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}
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SkBitmap createBitmap(int width, int height) {
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SkBitmap bm;
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bm.setConfig(SkBitmap::kARGB_8888_Config, width, height);
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bm.allocPixels();
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SkCanvas canvas(bm);
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canvas.clear(0x0);
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for (int y = 0; y < height; ++y) {
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for (int x = 0; x < width; ++x) {
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SkPaint paint;
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paint.setColor(SkColorSetARGB(255, x * 255 / width, y * 255 / height, 0));
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canvas.drawRect(SkRect::MakeXYWH(x, y, 1, 1), paint);
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}
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}
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return bm;
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->init();
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SkPaint paint;
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SkColorMatrix matrix;
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SkColorMatrixFilter* filter = new SkColorMatrixFilter();
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paint.setColorFilter(filter)->unref();
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matrix.setIdentity();
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 0, 0, &paint);
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matrix.setRotate(SkColorMatrix::kR_Axis, 90);
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 80, 0, &paint);
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matrix.setRotate(SkColorMatrix::kG_Axis, 90);
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 160, 0, &paint);
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matrix.setRotate(SkColorMatrix::kB_Axis, 90);
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 240, 0, &paint);
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matrix.setSaturation(SkFloatToScalar(0.0f));
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 0, 80, &paint);
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matrix.setSaturation(SkFloatToScalar(0.5f));
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 80, 80, &paint);
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matrix.setSaturation(SkFloatToScalar(1.0f));
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 160, 80, &paint);
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matrix.setSaturation(SkFloatToScalar(2.0f));
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 240, 80, &paint);
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matrix.setRGB2YUV();
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 0, 160, &paint);
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matrix.setYUV2RGB();
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filter->setMatrix(matrix);
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canvas->drawBitmap(fBitmap, 80, 160, &paint);
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SkScalar s1 = SK_Scalar1;
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SkScalar s255 = SkIntToScalar(255);
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// Move red into alpha, set color to white
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SkScalar data[20] = {
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0, 0, 0, 0, s255,
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0, 0, 0, 0, s255,
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0, 0, 0, 0, s255,
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s1, 0, 0, 0, 0,
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};
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filter->setArray(data);
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canvas->drawBitmap(fBitmap, 160, 160, &paint);
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}
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private:
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SkBitmap fBitmap;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ColorMatrixGM; }
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static GMRegistry reg(MyFactory);
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}
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