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/*
* Copyright 2017 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 "SkColorPriv.h"
#include "SkToSRGBColorFilter.h"
DEF_SIMPLE_GM_BG(tosrgb_colorfilter, canvas, 130, 130, SK_ColorBLACK) {
// Src bitmap with some colors that we're going to interpret as being in a few different spaces
SkBitmap bmp;
bmp.allocN32Pixels(3, 2);
SkPMColor* pixels = reinterpret_cast<SkPMColor*>(bmp.getPixels());
pixels[0] = SkPackARGB32(0xFF, 0xA0, 0x00, 0x00);
pixels[1] = SkPackARGB32(0xFF, 0x00, 0xA0, 0x00);
pixels[2] = SkPackARGB32(0xFF, 0x00, 0x00, 0xA0);
pixels[3] = SkPackARGB32(0xFF, 0x00, 0xA0, 0xA0);
pixels[4] = SkPackARGB32(0xFF, 0xA0, 0x00, 0xA0);
pixels[5] = SkPackARGB32(0xFF, 0xA0, 0xA0, 0x00);
// Reference image
canvas->drawBitmapRect(bmp, SkRect::MakeXYWH(10, 10, 50, 50), nullptr);
auto srgb = SkColorSpace::MakeSRGB();
auto rec2020 = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kRec2020);
// NarrowGamut RGB (an artifically smaller than sRGB gamut)
skcms_Matrix3x3 narrowGamutRGBMatrix;
SkAssertResult(skcms_PrimariesToXYZD50(
0.54f, 0.33f, // Rx, Ry
0.33f, 0.50f, // Gx, Gy
0.25f, 0.20f, // Bx, By
0.3127f, 0.3290f, // Wx, Wy
&narrowGamutRGBMatrix));
auto narrow = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, narrowGamutRGBMatrix);
SkPaint paint;
// Transforming sRGB -> sRGB should do nothing. Top two squares should look identical.
paint.setColorFilter(SkToSRGBColorFilter::Make(srgb));
canvas->drawBitmapRect(bmp, SkRect::MakeXYWH(70, 10, 50, 50), &paint);
// Rec2020 -> sRGB should produce more vivid colors.
paint.setColorFilter(SkToSRGBColorFilter::Make(rec2020));
canvas->drawBitmapRect(bmp, SkRect::MakeXYWH(10, 70, 50, 50), &paint);
// Narrow -> sRGB should produce more muted colors.
paint.setColorFilter(SkToSRGBColorFilter::Make(narrow));
canvas->drawBitmapRect(bmp, SkRect::MakeXYWH(70, 70, 50, 50), &paint);
}
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