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add animated version of mixer gm

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Bug: skia:
Change-Id: I8ebb953817baae603c311ef0c980d6d94bbb655a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201689
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
This commit is contained in:
Mike Reed 2019-03-16 16:27:38 -04:00 committed by Skia Commit-Bot
parent 90155edf14
commit e91825a07a
1 changed files with 60 additions and 27 deletions
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87
gm/mixercolorfilter.cpp
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@ -12,6 +12,7 @@
#include "SkGradientShader.h"
#include "SkLumaColorFilter.h"
#include "SkTableColorFilter.h"
#include "SkAnimTimer.h"
namespace {
@ -125,40 +126,72 @@ static sk_sp<SkShader> make_resource_shader(const char path[], int size) {
return img->makeShader(&m);
}
static sk_sp<SkShader> make_grad(int size) {
SkColor colors[] = { 0, 0, SK_ColorRED, SK_ColorRED };
static sk_sp<SkShader> make_grad(int size, float t) {
SkASSERT(t >= 0 && t <= 1);
unsigned r = SkScalarRoundToInt(t * 255);
SkColor c = SkColorSetARGB(r, r, 0, 0);
SkColor colors[] = { 0, c, SK_ColorRED };
SkPoint pts[] = {{0, 0}, {size*1.0f, size*1.0f}};
return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
SkScalar pos[] = {0, 1 - t, 1.0f};
return SkGradientShader::MakeLinear(pts, colors, pos, SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
}
DEF_SIMPLE_GM(mixershader_shadermixer, canvas, 542, 542) {
const int size = 256;
auto sh0 = make_resource_shader("images/mandrill_256.png", size);
auto sh1 = make_resource_shader("images/baby_tux.png", size);
auto sh2 = make_grad(size);
class ShaderMixerGM final : public skiagm::GM {
enum { SIZE = 256 };
float fPos = 0.5f;
sk_sp<SkShader> fS0, fS1;
SkRect r = SkRect::MakeIWH(size, size);
public:
ShaderMixerGM() {}
SkPaint paint;
protected:
SkString onShortName() override {
return SkString("mixershader_shadermixer");
}
canvas->translate(10, 10);
void onOnceBeforeDraw() override {
fS0 = make_resource_shader("images/mandrill_256.png", SIZE);
fS1 = make_resource_shader("images/baby_tux.png", SIZE);
}
canvas->save();
paint.setShader(sh0);
canvas->drawRect(r, paint);
canvas->translate(size + 10.0f, 0);
paint.setShader(sh1);
canvas->drawRect(r, paint);
canvas->restore();
SkISize onISize() override { return {542, 542}; }
canvas->translate(0, size + 10.0f);
paint.setShader(sh2);
canvas->drawRect(r, paint);
void onDraw(SkCanvas* canvas) override {
SkRect r = SkRect::MakeIWH(SIZE, SIZE);
auto mixer = SkMixer::MakeShaderLerp(sh2); // MakeLerp(0.5)
auto sh = SkShader::MakeMixer(sh0, sh1, mixer);
canvas->translate(size + 10.0f, 0);
paint.setShader(sh);
canvas->drawRect(r, paint);
}
SkPaint paint;
canvas->translate(10, 10);
canvas->save();
paint.setShader(fS0);
canvas->drawRect(r, paint);
canvas->translate(SIZE + 10.0f, 0);
paint.setShader(fS1);
canvas->drawRect(r, paint);
canvas->restore();
auto sh2 = make_grad(SIZE, fPos);
canvas->translate(0, SIZE + 10.0f);
paint.setShader(sh2);
canvas->drawRect(r, paint);
auto mixer = SkMixer::MakeShaderLerp(sh2); // MakeLerp(0.5)
auto sh = SkShader::MakeMixer(fS0, fS1, mixer);
canvas->translate(SIZE + 10.0f, 0);
paint.setShader(sh);
canvas->drawRect(r, paint);
}
bool onAnimate(const SkAnimTimer& timer) override {
fPos = (sin(timer.secs()) + 1) * 0.5f;
return true;
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new ShaderMixerGM; )