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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 "sk_tool_utils.h"
#include "SkAnimTimer.h"
#include "SkLightingImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPoint3.h"
#define WIDTH 330
#define HEIGHT 660
namespace skiagm {
class ImageLightingGM : public GM {
public:
ImageLightingGM()
: fAzimuth(SkIntToScalar(kStartAzimuth)) {
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("lighting");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(SkRect::MakeWH(
SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
canvas->drawBitmap(fBitmap, 0, 0, &paint);
canvas->restore();
}
void onOnceBeforeDraw() override {
fBitmap = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(sk_tool_utils::color_to_565(0xFF101010));
SkPaint checkPaint;
checkPaint.setColor(sk_tool_utils::color_to_565(0xFF202020));
for (int y = 0; y < HEIGHT; y += 16) {
for (int x = 0; x < WIDTH; x += 16) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
canvas->restore();
}
}
SkScalar cosAzimuth;
SkScalar sinAzimuth = SkScalarSinCos(SkDegreesToRadians(fAzimuth), &cosAzimuth);
SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
SkPoint3 spotLocation = SkPoint3::Make(spotTarget.fX + 70.7214f * cosAzimuth,
spotTarget.fY + 70.7214f * sinAzimuth,
spotTarget.fZ + SkIntToScalar(20));
SkScalar spotExponent = SK_Scalar1;
SkPoint3 pointLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
spotTarget.fY + 50 * sinAzimuth,
SkIntToScalar(10));
SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
SkPoint3 distantDirection = SkPoint3::Make(cosAzimuth * SkScalarCos(elevationRad),
sinAzimuth * SkScalarCos(elevationRad),
SkScalarSin(elevationRad));
SkScalar cutoffAngle = SkIntToScalar(15);
SkScalar kd = SkIntToScalar(2);
SkScalar ks = SkIntToScalar(1);
SkScalar shininess = SkIntToScalar(8);
SkScalar surfaceScale = SkIntToScalar(1);
SkColor white(0xFFFFFFFF);
SkPaint paint;
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
SkImageFilter::CropRect fullSizeCropRect(SkRect::MakeXYWH(0, 0, 100, 100));
sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect));
int y = 0;
for (int i = 0; i < 3; i++) {
const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : nullptr;
sk_sp<SkImageFilter> input = (i == 2) ? noopCropped : nullptr;
paint.setImageFilter(SkLightingImageFilter::MakePointLitDiffuse(pointLocation,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::MakeDistantLitDiffuse(distantDirection,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
paint.setImageFilter(SkLightingImageFilter::MakePointLitSpecular(pointLocation,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::MakeDistantLitSpecular(distantDirection,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::MakeSpotLitSpecular(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
}
}
bool onAnimate(const SkAnimTimer& timer) override {
constexpr SkScalar kDesiredDurationSecs = 15.0f;
fAzimuth = kStartAzimuth + timer.scaled(360.0f/kDesiredDurationSecs, 360.0f);
return true;
}
private:
static constexpr int kStartAzimuth = 225;
SkBitmap fBitmap;
SkScalar fAzimuth;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageLightingGM;)
}
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