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/*
* Copyright 2014 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 "SkColorCubeFilter.h"
#include "SkData.h"
#include "SkGradientShader.h"
#include "SkTemplates.h"
namespace skiagm {
static sk_sp<SkShader> MakeLinear() {
constexpr SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(80), SkIntToScalar(80) }
};
constexpr SkColor colors[] = { SK_ColorYELLOW, SK_ColorBLUE };
return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kRepeat_TileMode, 0,
&SkMatrix::I());
}
class ColorCubeGM : public GM {
public:
ColorCubeGM() : fInitialized(false) {
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("colorcube");
}
void make_3Dluts() {
make_3Dlut(&f3DLut4, 4, true, false, false);
make_3Dlut(&f3DLut8, 8, false, true, false);
make_3Dlut(&f3DLut16, 16, false, true, true);
make_3Dlut(&f3DLut32, 32, true, true, false);
make_3Dlut(&f3DLut64, 64, true, false, true);
}
void make_bitmap() {
fBitmap.allocN32Pixels(80, 80);
SkCanvas canvas(fBitmap);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setShader(MakeLinear());
canvas.drawRect(SkRect::MakeWH(80, 80), paint);
}
void make_3Dlut(sk_sp<SkData>* data, int size, bool invR, bool invG, bool invB) {
*data = SkData::MakeUninitialized(sizeof(SkColor) * size * size * size);
SkColor* pixels = (SkColor*)((*data)->writable_data());
SkAutoTMalloc<uint8_t> lutMemory(size);
SkAutoTMalloc<uint8_t> invLutMemory(size);
uint8_t* lut = lutMemory.get();
uint8_t* invLut = invLutMemory.get();
const int maxIndex = size - 1;
for (int i = 0; i < size; i++) {
lut[i] = (i * 255) / maxIndex;
invLut[i] = ((maxIndex - i) * 255) / maxIndex;
}
for (int r = 0; r < size; ++r) {
for (int g = 0; g < size; ++g) {
for (int b = 0; b < size; ++b) {
pixels[(size * ((size * b) + g)) + r] = sk_tool_utils::color_to_565(
SkColorSetARGB(0xFF,
invR ? invLut[r] : lut[r],
invG ? invLut[g] : lut[g],
invB ? invLut[b] : lut[b]));
}
}
}
}
SkISize onISize() override {
return SkISize::Make(500, 100);
}
void onDraw(SkCanvas* canvas) override {
if (!fInitialized) {
this->make_bitmap();
this->make_3Dluts();
fInitialized = true;
}
canvas->clear(0x00000000);
SkPaint paint;
paint.setColorFilter(SkColorCubeFilter::Make(f3DLut4, 4));
canvas->drawBitmap(fBitmap, 10, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Make(f3DLut8, 8));
canvas->drawBitmap(fBitmap, 110, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Make(f3DLut16, 16));
canvas->drawBitmap(fBitmap, 210, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Make(f3DLut32, 32));
canvas->drawBitmap(fBitmap, 310, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Make(f3DLut64, 64));
canvas->drawBitmap(fBitmap, 410, 10, &paint);
}
private:
typedef GM INHERITED;
bool fInitialized;
SkBitmap fBitmap;
sk_sp<SkData> f3DLut4;
sk_sp<SkData> f3DLut8;
sk_sp<SkData> f3DLut16;
sk_sp<SkData> f3DLut32;
sk_sp<SkData> f3DLut64;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ColorCubeGM; }
static GMRegistry reg(MyFactory);
}
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