2011-12-20 20:58:18 +00:00
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/*
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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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2012-10-16 17:50:48 +00:00
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#include "SkGradientShader.h"
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2015-07-07 13:11:19 +00:00
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#include "SkImage.h"
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2011-12-20 20:58:18 +00:00
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#define WIDTH 500
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#define HEIGHT 500
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2015-07-07 13:11:19 +00:00
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static void set_color_matrix(SkPaint* paint, const SkColorMatrix& matrix) {
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2019-04-08 20:23:20 +00:00
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paint->setColorFilter(SkColorFilters::MatrixRowMajor255(matrix.fMat));
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2012-06-04 19:07:41 +00:00
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}
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2015-07-07 13:11:19 +00:00
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static void set_array(SkPaint* paint, const SkScalar array[]) {
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paint->setColorFilter(SkColorFilters::MatrixRowMajor255(array));
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2012-06-04 19:07:41 +00:00
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}
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2015-07-07 13:11:19 +00:00
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class ColorMatrixGM : public skiagm::GM {
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2011-12-20 20:58:18 +00:00
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public:
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ColorMatrixGM() {
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2018-08-16 14:17:03 +00:00
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this->setBGColor(0xFF808080);
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2011-12-20 20:58:18 +00:00
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}
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2012-08-23 18:14:13 +00:00
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2011-12-20 20:58:18 +00:00
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protected:
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SkString onShortName() override {
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return SkString("colormatrix");
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}
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SkISize onISize() override {
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return SkISize::Make(WIDTH, HEIGHT);
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2011-12-20 20:58:18 +00:00
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}
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2016-03-29 16:03:52 +00:00
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2015-07-07 13:11:19 +00:00
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void onOnceBeforeDraw() override {
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fSolidImg = CreateSolidBitmap(64, 64);
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fTransparentImg = CreateTransparentBitmap(64, 64);
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}
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2011-12-20 20:58:18 +00:00
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2016-03-17 17:51:11 +00:00
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static sk_sp<SkImage> CreateSolidBitmap(int width, int height) {
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SkBitmap bm;
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bm.allocN32Pixels(width, height);
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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(SkIntToScalar(x),
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SkIntToScalar(y), SK_Scalar1, SK_Scalar1), paint);
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}
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}
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return SkImage::MakeFromBitmap(bm);
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}
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2012-10-16 17:50:48 +00:00
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// creates a bitmap with shades of transparent gray.
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static sk_sp<SkImage> CreateTransparentBitmap(int width, int height) {
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SkBitmap bm;
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bm.allocN32Pixels(width, height);
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SkCanvas canvas(bm);
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canvas.clear(0x0);
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SkPoint pts[] = {{0, 0}, {SkIntToScalar(width), SkIntToScalar(height)}};
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SkColor colors[] = {0x00000000, 0xFFFFFFFF};
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
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SkTileMode::kClamp));
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canvas.drawRect(SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height)), paint);
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return SkImage::MakeFromBitmap(bm);
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}
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2015-07-07 13:11:19 +00:00
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void onDraw(SkCanvas* canvas) override {
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2011-12-20 20:58:18 +00:00
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SkPaint paint;
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SkColorMatrix matrix;
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2016-10-06 00:33:02 +00:00
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paint.setBlendMode(SkBlendMode::kSrc);
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const SkImage* bmps[] = { fSolidImg.get(), fTransparentImg.get() };
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for (size_t i = 0; i < SK_ARRAY_COUNT(bmps); ++i) {
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matrix.setIdentity();
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 0, 0, &paint);
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matrix.setRotate(SkColorMatrix::kR_Axis, 90);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 80, 0, &paint);
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matrix.setRotate(SkColorMatrix::kG_Axis, 90);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 160, 0, &paint);
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matrix.setRotate(SkColorMatrix::kB_Axis, 90);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 240, 0, &paint);
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///////////////////////////////////////////////
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matrix.setSaturation(0.0f);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 0, 80, &paint);
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2012-10-16 17:50:48 +00:00
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2013-11-25 19:44:07 +00:00
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matrix.setSaturation(0.5f);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 80, 80, &paint);
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2013-11-25 19:44:07 +00:00
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matrix.setSaturation(1.0f);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 160, 80, &paint);
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2012-10-16 17:50:48 +00:00
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2013-11-25 19:44:07 +00:00
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matrix.setSaturation(2.0f);
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 240, 80, &paint);
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///////////////////////////////////////////////
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matrix.setRGB2YUV();
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 0, 160, &paint);
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matrix.setYUV2RGB();
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set_color_matrix(&paint, matrix);
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canvas->drawImage(bmps[i], 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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2015-07-07 13:11:19 +00:00
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set_array(&paint, data);
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canvas->drawImage(bmps[i], 160, 160, &paint);
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///////////////////////////////////////////////
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2012-10-16 17:50:48 +00:00
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canvas->translate(0, 240);
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}
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2011-12-20 20:58:18 +00:00
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}
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2012-08-23 18:14:13 +00:00
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2011-12-20 20:58:18 +00:00
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private:
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2016-03-17 17:51:11 +00:00
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sk_sp<SkImage> fSolidImg;
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sk_sp<SkImage> fTransparentImg;
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2011-12-20 20:58:18 +00:00
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new ColorMatrixGM; )
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