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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 "SkBitmapSource.h"
#include "SkData.h"
#include "SkGradientShader.h"
namespace skiagm {
static SkShader* MakeLinear() {
static const SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(80), SkIntToScalar(80) }
};
static const SkColor colors[] = { SK_ColorYELLOW, SK_ColorBLUE };
return SkGradientShader::CreateLinear(
pts, colors, NULL, 2, SkShader::kRepeat_TileMode, 0, &SkMatrix::I());
}
class ColorCubeGM : public GM {
public:
ColorCubeGM()
: fInitialized(false)
, f3DLut4(NULL)
, f3DLut8(NULL)
, f3DLut16(NULL)
, f3DLut32(NULL)
, f3DLut64(NULL)
{
this->setBGColor(0xFF000000);
}
~ColorCubeGM() {
SkSafeUnref(f3DLut4);
SkSafeUnref(f3DLut8);
SkSafeUnref(f3DLut16);
SkSafeUnref(f3DLut32);
SkSafeUnref(f3DLut64);
}
protected:
virtual SkString onShortName() {
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);
SkShader* shader = MakeLinear();
paint.setShader(shader);
SkRect r = { 0, 0, SkIntToScalar(80), SkIntToScalar(80) };
canvas.drawRect(r, paint);
shader->unref();
}
void make_3Dlut(SkData** data, int size, bool invR, bool invG, bool invB) {
*data = SkData::NewUninitialized(sizeof(SkColor) * size * size * size);
SkColor* pixels = (SkColor*)((*data)->writable_data());
SkAutoMalloc lutMemory(size);
SkAutoMalloc invLutMemory(size);
uint8_t* lut = (uint8_t*)lutMemory.get();
uint8_t* invLut = (uint8_t*)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] = SkColorSetARGB(0xFF,
invR ? invLut[r] : lut[r],
invG ? invLut[g] : lut[g],
invB ? invLut[b] : lut[b]);
}
}
}
}
virtual SkISize onISize() {
return SkISize::Make(500, 100);
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
this->make_bitmap();
this->make_3Dluts();
fInitialized = true;
}
canvas->clear(0x00000000);
SkPaint paint;
paint.setColorFilter(SkColorCubeFilter::Create(f3DLut4, 4))->unref();
canvas->drawBitmap(fBitmap, 10, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Create(f3DLut8, 8))->unref();
canvas->drawBitmap(fBitmap, 110, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Create(f3DLut16, 16))->unref();
canvas->drawBitmap(fBitmap, 210, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Create(f3DLut32, 32))->unref();
canvas->drawBitmap(fBitmap, 310, 10, &paint);
paint.setColorFilter(SkColorCubeFilter::Create(f3DLut64, 64))->unref();
canvas->drawBitmap(fBitmap, 410, 10, &paint);
}
private:
typedef GM INHERITED;
bool fInitialized;
SkBitmap fBitmap;
SkData* f3DLut4;
SkData* f3DLut8;
SkData* f3DLut16;
SkData* f3DLut32;
SkData* f3DLut64;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ColorCubeGM; }
static GMRegistry reg(MyFactory);
}
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