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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 "SkLightingImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPoint3.h"
#define WIDTH 330
#define HEIGHT 660
namespace skiagm {
class ImageLightingGM : public GM {
public:
ImageLightingGM() : fInitialized(false) {
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("lighting");
}
void make_bitmap() {
fBitmap.allocN32Pixels(100, 100);
SkCanvas canvas(fBitmap);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface_always(&paint);
paint.setColor(0xFFFFFFFF);
paint.setTextSize(SkIntToScalar(96));
const char* str = "e";
canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
}
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 onDraw(SkCanvas* canvas) override {
if (!fInitialized) {
make_bitmap();
fInitialized = true;
}
canvas->clear(0xFF101010);
SkPaint checkPaint;
checkPaint.setColor(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();
}
}
SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225));
SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
SkPoint3 distantDirection = SkPoint3::Make(SkScalarMul(SkScalarCos(azimuthRad),
SkScalarCos(elevationRad)),
SkScalarMul(SkScalarSin(azimuthRad),
SkScalarCos(elevationRad)),
SkScalarSin(elevationRad));
SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
SkIntToScalar(-10),
SkIntToScalar(20));
SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
SkScalar spotExponent = SK_Scalar1;
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));
SkAutoTUnref<SkImageFilter> noopCropped(SkOffsetImageFilter::Create(0, 0, NULL, &cropRect));
int y = 0;
for (int i = 0; i < 3; i++) {
const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : NULL;
SkImageFilter* input = (i == 2) ? noopCropped.get() : NULL;
paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation,
white,
surfaceScale,
kd,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection,
white,
surfaceScale,
kd,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
kd,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation,
white,
surfaceScale,
ks,
shininess,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection,
white,
surfaceScale,
ks,
shininess,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
ks,
shininess,
input,
cr))->unref();
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
}
}
private:
typedef GM INHERITED;
SkBitmap fBitmap;
bool fInitialized;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ImageLightingGM; }
static GMRegistry reg(MyFactory);
}
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