| /* |
| * 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.h" |
| #include "SkCanvas.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkGradientShader.h" |
| #include "SkTableColorFilter.h" |
| |
| 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; |
| SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} }; |
| SkColor colors[] = { |
| SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN, |
| SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE |
| }; |
| SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), |
| SkShader::kClamp_TileMode); |
| paint.setShader(s)->unref(); |
| canvas.drawPaint(paint); |
| } |
| static void make_bm1(SkBitmap* bm) { |
| int W = 120; |
| int H = 120; |
| bm->allocN32Pixels(W, H); |
| bm->eraseColor(SK_ColorTRANSPARENT); |
| |
| SkCanvas canvas(*bm); |
| SkPaint paint; |
| SkScalar cx = SkIntToScalar(W)/2; |
| SkScalar cy = SkIntToScalar(H)/2; |
| SkColor colors[] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, |
| }; |
| SkShader* s = SkGradientShader::CreateRadial(SkPoint::Make(SkIntToScalar(W)/2, |
| SkIntToScalar(H)/2), |
| SkIntToScalar(W)/2, colors, NULL, SK_ARRAY_COUNT(colors), |
| SkShader::kClamp_TileMode); |
| paint.setShader(s)->unref(); |
| 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 SkColorFilter* make_null_cf() { |
| return NULL; |
| } |
| |
| static SkColorFilter* make_cf0() { |
| uint8_t table[256]; make_table0(table); |
| return SkTableColorFilter::Create(table); |
| } |
| static SkColorFilter* make_cf1() { |
| uint8_t table[256]; make_table1(table); |
| return SkTableColorFilter::Create(table); |
| } |
| static SkColorFilter* make_cf2() { |
| uint8_t table[256]; make_table2(table); |
| return SkTableColorFilter::Create(table); |
| } |
| static 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::CreateARGB(NULL, table0, table1, table2); |
| } |
| |
| class TableColorFilterGM : public skiagm::GM { |
| public: |
| TableColorFilterGM() {} |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("tablecolorfilter"); |
| } |
| |
| virtual SkISize onISize() { |
| return SkISize::Make(700, 1650); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| canvas->drawColor(0xFFDDDDDD); |
| canvas->translate(20, 20); |
| |
| |
| static 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]())->unref(); |
| canvas->drawBitmap(bm, x, y, &paint); |
| } |
| |
| paint.setColorFilter(NULL); |
| |
| for (unsigned i = 0; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) { |
| SkAutoTUnref<SkColorFilter> colorFilter1(gColorFilterMakers[i]()); |
| SkAutoTUnref<SkImageFilter> imageFilter1(SkColorFilterImageFilter::Create( |
| colorFilter1, NULL, NULL, 0)); |
| |
| // 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) { |
| SkAutoTUnref<SkColorFilter> colorFilter2(gColorFilterMakers[j]()); |
| SkAutoTUnref<SkImageFilter> imageFilter2(SkColorFilterImageFilter::Create( |
| colorFilter2, imageFilter1, NULL, 0)); |
| paint.setImageFilter(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; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static skiagm::GM* MyFactory(void*) { return new TableColorFilterGM; } |
| static skiagm::GMRegistry reg(MyFactory); |