143 lines
4.2 KiB
C++
143 lines
4.2 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkColorCubeFilter.h"
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#include "SkBitmapSource.h"
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#include "SkData.h"
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#include "SkGradientShader.h"
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namespace skiagm {
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static SkShader* MakeLinear() {
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static const SkPoint pts[2] = {
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{ 0, 0 },
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{ SkIntToScalar(80), SkIntToScalar(80) }
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};
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static const SkColor colors[] = { SK_ColorYELLOW, SK_ColorBLUE };
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return SkGradientShader::CreateLinear(
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pts, colors, NULL, 2, SkShader::kRepeat_TileMode, 0, &SkMatrix::I());
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}
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class ColorCubeGM : public GM {
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public:
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ColorCubeGM()
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: fInitialized(false)
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, f3DLut4(NULL)
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, f3DLut8(NULL)
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, f3DLut16(NULL)
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, f3DLut32(NULL)
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, f3DLut64(NULL)
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{
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this->setBGColor(0xFF000000);
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}
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~ColorCubeGM() {
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SkSafeUnref(f3DLut4);
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SkSafeUnref(f3DLut8);
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SkSafeUnref(f3DLut16);
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SkSafeUnref(f3DLut32);
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SkSafeUnref(f3DLut64);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("colorcube");
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}
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void make_3Dluts() {
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make_3Dlut(&f3DLut4, 4, true, false, false);
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make_3Dlut(&f3DLut8, 8, false, true, false);
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make_3Dlut(&f3DLut16, 16, false, true, true);
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make_3Dlut(&f3DLut32, 32, true, true, false);
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make_3Dlut(&f3DLut64, 64, true, false, true);
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(80, 80);
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SkCanvas canvas(fBitmap);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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SkShader* shader = MakeLinear();
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paint.setShader(shader);
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SkRect r = { 0, 0, SkIntToScalar(80), SkIntToScalar(80) };
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canvas.drawRect(r, paint);
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shader->unref();
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}
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void make_3Dlut(SkData** data, int size, bool invR, bool invG, bool invB) {
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*data = SkData::NewUninitialized(sizeof(SkColor) * size * size * size);
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SkColor* pixels = (SkColor*)((*data)->writable_data());
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SkAutoMalloc lutMemory(size);
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SkAutoMalloc invLutMemory(size);
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uint8_t* lut = (uint8_t*)lutMemory.get();
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uint8_t* invLut = (uint8_t*)invLutMemory.get();
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const int maxIndex = size - 1;
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for (int i = 0; i < size; i++) {
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lut[i] = (i * 255) / maxIndex;
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invLut[i] = ((maxIndex - i) * 255) / maxIndex;
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}
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for (int r = 0; r < size; ++r) {
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for (int g = 0; g < size; ++g) {
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for (int b = 0; b < size; ++b) {
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pixels[(size * ((size * b) + g)) + r] = sk_tool_utils::color_to_565(
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SkColorSetARGB(0xFF,
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invR ? invLut[r] : lut[r],
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invG ? invLut[g] : lut[g],
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invB ? invLut[b] : lut[b]));
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}
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}
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}
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}
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virtual SkISize onISize() {
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return SkISize::Make(500, 100);
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}
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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this->make_bitmap();
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this->make_3Dluts();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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SkPaint paint;
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paint.setColorFilter(SkColorCubeFilter::Create(f3DLut4, 4))->unref();
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canvas->drawBitmap(fBitmap, 10, 10, &paint);
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paint.setColorFilter(SkColorCubeFilter::Create(f3DLut8, 8))->unref();
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canvas->drawBitmap(fBitmap, 110, 10, &paint);
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paint.setColorFilter(SkColorCubeFilter::Create(f3DLut16, 16))->unref();
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canvas->drawBitmap(fBitmap, 210, 10, &paint);
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paint.setColorFilter(SkColorCubeFilter::Create(f3DLut32, 32))->unref();
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canvas->drawBitmap(fBitmap, 310, 10, &paint);
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paint.setColorFilter(SkColorCubeFilter::Create(f3DLut64, 64))->unref();
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canvas->drawBitmap(fBitmap, 410, 10, &paint);
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}
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private:
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typedef GM INHERITED;
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bool fInitialized;
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SkBitmap fBitmap;
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SkData* f3DLut4;
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SkData* f3DLut8;
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SkData* f3DLut16;
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SkData* f3DLut32;
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SkData* f3DLut64;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ColorCubeGM; }
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static GMRegistry reg(MyFactory);
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}
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