| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/effects/SkImageFilters.h" |
| |
| #include <math.h> |
| #include <utility> |
| |
| static sk_sp<SkShader> make_shader0(int w, int h) { |
| SkPoint pts[] = { {0, 0}, {SkIntToScalar(w), SkIntToScalar(h)} }; |
| SkColor colors[] = { |
| SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN, |
| SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE |
| }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, std::size(colors), |
| SkTileMode::kClamp); |
| } |
| static void make_bm0(SkBitmap* bm) { |
| int W = 120; |
| int H = 120; |
| bm->allocN32Pixels(W, H); |
| bm->eraseColor(SK_ColorTRANSPARENT); |
| |
| SkCanvas canvas(*bm); |
| SkPaint paint; |
| paint.setShader(make_shader0(W, H)); |
| canvas.drawPaint(paint); |
| } |
| static sk_sp<SkShader> make_shader1(int w, int h) { |
| SkScalar cx = SkIntToScalar(w)/2; |
| SkScalar cy = SkIntToScalar(h)/2; |
| SkColor colors[] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, |
| }; |
| return SkGradientShader::MakeRadial(SkPoint::Make(cx, cy), cx, colors, nullptr, |
| std::size(colors), SkTileMode::kClamp); |
| } |
| static void make_bm1(SkBitmap* bm) { |
| int W = 120; |
| int H = 120; |
| SkScalar cx = SkIntToScalar(W)/2; |
| SkScalar cy = SkIntToScalar(H)/2; |
| bm->allocN32Pixels(W, H); |
| bm->eraseColor(SK_ColorTRANSPARENT); |
| |
| SkCanvas canvas(*bm); |
| SkPaint paint; |
| paint.setShader(make_shader1(W, H)); |
| paint.setAntiAlias(true); |
| canvas.drawCircle(cx, cy, cx, paint); |
| } |
| |
| static void make_table0(uint8_t table[]) { |
| for (int i = 0; i < 256; ++i) { |
| int n = i >> 5; |
| table[i] = (n << 5) | (n << 2) | (n >> 1); |
| } |
| } |
| static void make_table1(uint8_t table[]) { |
| for (int i = 0; i < 256; ++i) { |
| table[i] = i * i / 255; |
| } |
| } |
| static void make_table2(uint8_t table[]) { |
| for (int i = 0; i < 256; ++i) { |
| float fi = i / 255.0f; |
| table[i] = static_cast<uint8_t>(sqrtf(fi) * 255); |
| } |
| } |
| |
| static sk_sp<SkColorFilter> make_null_cf() { |
| return nullptr; |
| } |
| |
| static sk_sp<SkColorFilter> make_cf0() { |
| uint8_t table[256]; make_table0(table); |
| return SkColorFilters::Table(table); |
| } |
| static sk_sp<SkColorFilter> make_cf1() { |
| uint8_t table[256]; make_table1(table); |
| return SkColorFilters::Table(table); |
| } |
| static sk_sp<SkColorFilter> make_cf2() { |
| uint8_t table[256]; make_table2(table); |
| return SkColorFilters::Table(table); |
| } |
| static sk_sp<SkColorFilter> make_cf3() { |
| uint8_t table0[256]; make_table0(table0); |
| uint8_t table1[256]; make_table1(table1); |
| uint8_t table2[256]; make_table2(table2); |
| return SkColorFilters::TableARGB(nullptr, table0, table1, table2); |
| } |
| |
| class TableColorFilterGM : public skiagm::GM { |
| public: |
| TableColorFilterGM() {} |
| |
| protected: |
| SkString getName() const override { return SkString("tablecolorfilter"); } |
| |
| SkISize getISize() override { return {700, 1650}; } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->drawColor(0xFFDDDDDD); |
| canvas->translate(20, 20); |
| |
| static sk_sp<SkColorFilter> (*gColorFilterMakers[])() = { |
| make_null_cf, make_cf0, make_cf1, make_cf2, make_cf3 |
| }; |
| static void (*gBitmapMakers[])(SkBitmap*) = { make_bm0, make_bm1 }; |
| |
| // This test will be done once for each bitmap with the results stacked vertically. |
| // For a single bitmap the resulting image will be the following: |
| // - A first line with the original bitmap, followed by the image drawn once |
| // with each of the N color filters |
| // - N lines of the bitmap drawn N times, this will cover all N*N combinations of |
| // pair of color filters in order to test the collapsing of consecutive table |
| // color filters. |
| // |
| // Here is a graphical representation of the result for 2 bitmaps and 2 filters |
| // with the number corresponding to the number of filters the bitmap goes through: |
| // |
| // --bitmap1 |
| // 011 |
| // 22 |
| // 22 |
| // --bitmap2 |
| // 011 |
| // 22 |
| // 22 |
| |
| SkScalar x = 0, y = 0; |
| for (size_t bitmapMaker = 0; bitmapMaker < std::size(gBitmapMakers); ++bitmapMaker) { |
| SkBitmap bm; |
| gBitmapMakers[bitmapMaker](&bm); |
| |
| SkScalar xOffset = SkScalar(bm.width() * 9 / 8); |
| SkScalar yOffset = SkScalar(bm.height() * 9 / 8); |
| |
| // Draw the first element of the first line |
| x = 0; |
| SkPaint paint; |
| SkSamplingOptions sampling; |
| |
| canvas->drawImage(bm.asImage(), x, y); |
| |
| // Draws the rest of the first line for this bitmap |
| // each draw being at xOffset of the previous one |
| for (unsigned i = 1; i < std::size(gColorFilterMakers); ++i) { |
| x += xOffset; |
| paint.setColorFilter(gColorFilterMakers[i]()); |
| canvas->drawImage(bm.asImage(), x, y, sampling, &paint); |
| } |
| |
| paint.setColorFilter(nullptr); |
| |
| for (unsigned i = 0; i < std::size(gColorFilterMakers); ++i) { |
| sk_sp<SkColorFilter> colorFilter1(gColorFilterMakers[i]()); |
| sk_sp<SkImageFilter> imageFilter1(SkImageFilters::ColorFilter( |
| std::move(colorFilter1), nullptr)); |
| |
| // Move down to the next line and draw it |
| // each draw being at xOffset of the previous one |
| y += yOffset; |
| x = 0; |
| for (unsigned j = 1; j < std::size(gColorFilterMakers); ++j) { |
| sk_sp<SkColorFilter> colorFilter2(gColorFilterMakers[j]()); |
| sk_sp<SkImageFilter> imageFilter2(SkImageFilters::ColorFilter( |
| std::move(colorFilter2), imageFilter1, nullptr)); |
| paint.setImageFilter(std::move(imageFilter2)); |
| canvas->drawImage(bm.asImage(), x, y, sampling, &paint); |
| x += xOffset; |
| } |
| } |
| |
| // Move down one line to the beginning of the block for next bitmap |
| y += yOffset; |
| } |
| } |
| |
| private: |
| using INHERITED = GM; |
| }; |
| DEF_GM( return new TableColorFilterGM; ) |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class ComposeColorFilterGM : public skiagm::GM { |
| enum { |
| COLOR_COUNT = 3, |
| MODE_COUNT = 4, |
| }; |
| const SkColor* fColors; |
| const SkBlendMode* fModes; |
| const char* fName; |
| |
| public: |
| ComposeColorFilterGM(const SkColor colors[], const SkBlendMode modes[], const char* name) |
| : fColors(colors), fModes(modes), fName(name) {} |
| |
| private: |
| SkString getName() const override { return SkString(fName); } |
| |
| SkISize getISize() override { return {790, 790}; } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkBitmap bm; |
| make_bm1(&bm); |
| |
| canvas->drawColor(0xFFDDDDDD); |
| |
| const int MODES = MODE_COUNT * COLOR_COUNT; |
| sk_sp<SkColorFilter> filters[MODES]; |
| int index = 0; |
| for (int i = 0; i < MODE_COUNT; ++i) { |
| for (int j = 0; j < COLOR_COUNT; ++j) { |
| filters[index++] = SkColorFilters::Blend(fColors[j], fModes[i]); |
| } |
| } |
| |
| SkPaint paint; |
| paint.setShader(make_shader1(50, 50)); |
| SkRect r = SkRect::MakeWH(50, 50); |
| const SkScalar spacer = 10; |
| |
| canvas->translate(spacer, spacer); |
| |
| canvas->drawRect(r, paint); // orig |
| |
| for (int i = 0; i < MODES; ++i) { |
| paint.setColorFilter(filters[i]); |
| |
| canvas->save(); |
| canvas->translate((i + 1) * (r.width() + spacer), 0); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(0, (i + 1) * (r.width() + spacer)); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| } |
| |
| canvas->translate(r.width() + spacer, r.width() + spacer); |
| |
| for (int y = 0; y < MODES; ++y) { |
| canvas->save(); |
| for (int x = 0; x < MODES; ++x) { |
| paint.setColorFilter(filters[y]->makeComposed(filters[x])); |
| canvas->drawRect(r, paint); |
| canvas->translate(r.width() + spacer, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, r.height() + spacer); |
| } |
| } |
| }; |
| |
| const SkColor gColors0[] = { SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW }; |
| const SkBlendMode gModes0[] = { |
| SkBlendMode::kOverlay, |
| SkBlendMode::kDarken, |
| SkBlendMode::kColorBurn, |
| SkBlendMode::kExclusion, |
| }; |
| DEF_GM( return new ComposeColorFilterGM(gColors0, gModes0, "colorcomposefilter_wacky"); ) |
| |
| const SkColor gColors1[] = { 0x80FF0000, 0x8000FF00, 0x800000FF }; |
| const SkBlendMode gModes1[] = { |
| SkBlendMode::kSrcOver, |
| SkBlendMode::kXor, |
| SkBlendMode::kDstOut, |
| SkBlendMode::kSrcATop, |
| }; |
| DEF_GM( return new ComposeColorFilterGM(gColors1, gModes1, "colorcomposefilter_alpha"); ) |