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- /*
- * 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/SkColorFilterImageFilter.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/effects/SkTableColorFilter.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, SK_ARRAY_COUNT(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,
- SK_ARRAY_COUNT(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 SkTableColorFilter::Make(table);
- }
- static sk_sp<SkColorFilter> make_cf1() {
- uint8_t table[256]; make_table1(table);
- return SkTableColorFilter::Make(table);
- }
- static sk_sp<SkColorFilter> make_cf2() {
- uint8_t table[256]; make_table2(table);
- return SkTableColorFilter::Make(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 SkTableColorFilter::MakeARGB(nullptr, table0, table1, table2);
- }
- class TableColorFilterGM : public skiagm::GM {
- public:
- TableColorFilterGM() {}
- protected:
- SkString onShortName() override {
- return SkString("tablecolorfilter");
- }
- SkISize onISize() 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 collpsing 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 < SK_ARRAY_COUNT(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;
- canvas->drawBitmap(bm, x, y, &paint);
- // Draws the rest of the first line for this bitmap
- // each draw being at xOffset of the previous one
- for (unsigned i = 1; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) {
- x += xOffset;
- paint.setColorFilter(gColorFilterMakers[i]());
- canvas->drawBitmap(bm, x, y, &paint);
- }
- paint.setColorFilter(nullptr);
- for (unsigned i = 0; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) {
- sk_sp<SkColorFilter> colorFilter1(gColorFilterMakers[i]());
- sk_sp<SkImageFilter> imageFilter1(SkColorFilterImageFilter::Make(
- 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 < SK_ARRAY_COUNT(gColorFilterMakers); ++j) {
- sk_sp<SkColorFilter> colorFilter2(gColorFilterMakers[j]());
- sk_sp<SkImageFilter> imageFilter2(SkColorFilterImageFilter::Make(
- std::move(colorFilter2), imageFilter1, nullptr));
- paint.setImageFilter(std::move(imageFilter2));
- canvas->drawBitmap(bm, x, y, &paint);
- x += xOffset;
- }
- }
- // Move down one line to the beginning of the block for next bitmap
- y += yOffset;
- }
- }
- private:
- typedef GM INHERITED;
- };
- 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 onShortName() override { return SkString(fName); }
- SkISize onISize() 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"); )
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