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/*
* Copyright 2012 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 "SkColorMatrixFilter.h"
#include "SkColorPriv.h"
#include "SkShader.h"
#include "SkBlurImageFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkTDArray.h"
#define FILTER_WIDTH SkIntToScalar(30)
#define FILTER_HEIGHT SkIntToScalar(30)
#define MARGIN SkIntToScalar(10)
static sk_sp<SkColorFilter> cf_make_brightness(float brightness) {
SkScalar amount255 = brightness * 255;
SkScalar matrix[20] = {
1, 0, 0, 0, amount255,
0, 1, 0, 0, amount255,
0, 0, 1, 0, amount255,
0, 0, 0, 1, 0 };
return SkColorFilter::MakeMatrixFilterRowMajor255(matrix);
}
static sk_sp<SkColorFilter> cf_make_grayscale() {
SkScalar matrix[20];
memset(matrix, 0, 20 * sizeof(SkScalar));
matrix[0] = matrix[5] = matrix[10] = 0.2126f;
matrix[1] = matrix[6] = matrix[11] = 0.7152f;
matrix[2] = matrix[7] = matrix[12] = 0.0722f;
matrix[18] = 1.0f;
return SkColorFilter::MakeMatrixFilterRowMajor255(matrix);
}
static sk_sp<SkColorFilter> cf_make_colorize(SkColor color) {
return SkColorFilter::MakeModeFilter(color, SkBlendMode::kSrc);
}
static void sk_gm_get_colorfilters(SkTArray<sk_sp<SkColorFilter>>* array) {
array->push_back(cf_make_brightness(0.5f));
array->push_back(cf_make_grayscale());
array->push_back(cf_make_colorize(SK_ColorBLUE));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkGradientShader.h"
#include "SkImage.h"
#include "Resources.h"
static sk_sp<SkShader> sh_make_lineargradient0() {
const SkPoint pts[] = { { 0, 0 }, { 100, 100 } };
const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
return SkGradientShader::MakeLinear(pts, colors, nullptr, 3, SkShader::kRepeat_TileMode);
}
static sk_sp<SkShader> sh_make_lineargradient1() {
const SkPoint pts[] = { { 0, 0 }, { 100, 100 } };
const SkColor colors[] = { SK_ColorRED, 0x0000FF00, SK_ColorBLUE };
return SkGradientShader::MakeLinear(pts, colors, nullptr, 3, SkShader::kRepeat_TileMode);
}
static sk_sp<SkShader> sh_make_image() {
sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_128.png"));
if (!image) {
return nullptr;
}
return image->makeShader(SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
}
static void sk_gm_get_shaders(SkTDArray<SkShader*>* array) {
if (auto shader = sh_make_lineargradient0()) {
*array->append() = shader.release();
}
if (auto shader = sh_make_lineargradient1()) {
*array->append() = shader.release();
}
if (auto shader = sh_make_image()) {
*array->append() = shader.release();
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
static sk_sp<SkImageFilter> make_blur(float amount, sk_sp<SkImageFilter> input) {
return SkBlurImageFilter::Make(amount, amount, std::move(input));
}
static sk_sp<SkImageFilter> make_brightness(float amount, sk_sp<SkImageFilter> input) {
return SkColorFilterImageFilter::Make(cf_make_brightness(amount), std::move(input));
}
static sk_sp<SkImageFilter> make_grayscale(sk_sp<SkImageFilter> input) {
return SkColorFilterImageFilter::Make(cf_make_grayscale(), std::move(input));
}
static sk_sp<SkImageFilter> make_mode_blue(sk_sp<SkImageFilter> input) {
return SkColorFilterImageFilter::Make(cf_make_colorize(SK_ColorBLUE), std::move(input));
}
static void draw_clipped_rect(SkCanvas* canvas,
const SkRect& r,
const SkPaint& paint,
float outset = 0.0f) {
canvas->save();
SkRect clip(r);
clip.outset(outset, outset);
canvas->clipRect(clip);
canvas->drawRect(r, paint);
canvas->restore();
}
DEF_SIMPLE_GM(colorfilterimagefilter, canvas, 400, 100){
SkRect r = SkRect::MakeWH(FILTER_WIDTH, FILTER_HEIGHT);
SkPaint paint;
paint.setColor(SK_ColorRED);
canvas->save();
for (float brightness = -1.0f; brightness <= 1.0f; brightness += 0.2f) {
sk_sp<SkImageFilter> dim(make_brightness(-brightness, nullptr));
sk_sp<SkImageFilter> bright(make_brightness(brightness, std::move(dim)));
paint.setImageFilter(std::move(bright));
draw_clipped_rect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
canvas->restore();
canvas->translate(0, FILTER_HEIGHT + MARGIN);
{
sk_sp<SkImageFilter> brightness(make_brightness(0.9f, nullptr));
sk_sp<SkImageFilter> grayscale(make_grayscale(std::move(brightness)));
paint.setImageFilter(std::move(grayscale));
draw_clipped_rect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
sk_sp<SkImageFilter> grayscale(make_grayscale(nullptr));
sk_sp<SkImageFilter> brightness(make_brightness(0.9f, std::move(grayscale)));
paint.setImageFilter(std::move(brightness));
draw_clipped_rect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
sk_sp<SkImageFilter> blue(make_mode_blue(nullptr));
sk_sp<SkImageFilter> brightness(make_brightness(1.0f, std::move(blue)));
paint.setImageFilter(std::move(brightness));
draw_clipped_rect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
sk_sp<SkImageFilter> brightness(make_brightness(1.0f, nullptr));
sk_sp<SkImageFilter> blue(make_mode_blue(std::move(brightness)));
paint.setImageFilter(std::move(blue));
draw_clipped_rect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
sk_sp<SkImageFilter> blur(make_blur(3.0f, nullptr));
sk_sp<SkImageFilter> brightness(make_brightness(0.5f, std::move(blur)));
paint.setImageFilter(std::move(brightness));
draw_clipped_rect(canvas, r, paint, 3);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
sk_sp<SkImageFilter> blue(make_mode_blue(nullptr));
paint.setImageFilter(std::move(blue));
draw_clipped_rect(canvas, r, paint, 5);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
}
DEF_SIMPLE_GM(colorfilterimagefilter_layer, canvas, 32, 32) {
SkAutoCanvasRestore autoCanvasRestore(canvas, false);
SkColorMatrix cm;
cm.setSaturation(0.0f);
sk_sp<SkColorFilter> cf(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat));
SkPaint p;
p.setImageFilter(SkColorFilterImageFilter::Make(std::move(cf), nullptr));
canvas->saveLayer(nullptr, &p);
canvas->clear(SK_ColorRED);
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkGradientShader.h"
template <typename T> class SkTRefArray : public SkTDArray<T> {
public:
~SkTRefArray() { this->unrefAll(); }
};
DEF_SIMPLE_GM(colorfiltershader, canvas, 610, 610) {
SkTArray<sk_sp<SkColorFilter>> filters;
sk_gm_get_colorfilters(&filters);
SkTRefArray<SkShader*> shaders;
sk_gm_get_shaders(&shaders);
const SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
*shaders.append() = SkGradientShader::MakeTwoPointConical({0, 0}, 50, {0, 0}, 150,
colors, nullptr, 2,
SkShader::kClamp_TileMode).release();
SkPaint paint;
SkRect r = SkRect::MakeWH(120, 120);
canvas->translate(20, 20);
for (int y = 0; y < shaders.count(); ++y) {
SkShader* shader = shaders[y];
canvas->save();
for (int x = -1; x < filters.count(); ++x) {
sk_sp<SkColorFilter> filter = x >= 0 ? filters[x] : nullptr;
paint.setShader(shader->makeWithColorFilter(filter));
canvas->drawRect(r, paint);
canvas->translate(150, 0);
}
canvas->restore();
canvas->translate(0, 150);
}
}
DEF_SIMPLE_GM(mixershader, canvas, 800, 700) {
auto shaderA = GetResourceAsImage("images/mandrill_128.png")->makeShader(SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
const SkColor colors[] = { SK_ColorGREEN, 0 };
auto shaderB = SkGradientShader::MakeRadial({60, 60}, 55, colors, nullptr, 2,
SkShader::kClamp_TileMode,
SkGradientShader::kInterpolateColorsInPremul_Flag,
nullptr);
const SkBlendMode modes[] = {
SkBlendMode::kSrc, SkBlendMode::kModulate, SkBlendMode::kColorBurn, SkBlendMode::kPlus,
SkBlendMode::kDstATop,
};
SkPaint paint;
SkRect r = SkRect::MakeWH(120, 120);
canvas->translate(10, 10);
for (auto mode : modes) {
canvas->save();
const int count = 6;
for (int x = 0; x < count; ++x) {
const float t = x * 1.0f / (count - 1);
paint.setShader(SkShader::MakeCompose(shaderA, shaderB, mode, t));
canvas->drawRect(r, paint);
canvas->translate(r.width() + 10, 0);
}
canvas->restore();
canvas->translate(0, r.height() + 20);
}
}
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