Index: gm/lcdoverlap.cpp |
diff --git a/gm/lcdoverlap.cpp b/gm/lcdoverlap.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..17775646a6bee6256bb1924311311da8a1fb4925 |
--- /dev/null |
+++ b/gm/lcdoverlap.cpp |
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+/* |
+ * Copyright 2015 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+ |
+/* |
+ * Tests overlapping LCD text |
+ */ |
+ |
+#include "gm.h" |
+#include "SkCanvas.h" |
+#include "SkSurface.h" |
+#include "SkTextBlob.h" |
+ |
+namespace skiagm { |
+ |
+static const int kWidth = 750; |
+static const int kHeight = 750; |
+ |
+class LcdOverlapGM : public skiagm::GM { |
+public: |
+ LcdOverlapGM() { |
+ const int kPointSize = 25; |
+ fTextHeight = SkIntToScalar(kPointSize); |
+ } |
+ |
+protected: |
+ SkString onShortName() override { |
+ return SkString("lcdoverlap"); |
+ } |
+ |
+ void onOnceBeforeDraw() override { |
+ // build text blob |
+ SkTextBlobBuilder builder; |
+ |
+ SkPaint paint; |
+ sk_tool_utils::set_portable_typeface(&paint); |
+ paint.setTextSize(32); |
+ const char* text = "able was I ere I saw elba"; |
+ paint.setAntiAlias(true); |
+ paint.setSubpixelText(true); |
+ paint.setLCDRenderText(true); |
+ sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0); |
+ fBlob.reset(builder.build()); |
+ } |
+ |
+ SkISize onISize() override { return SkISize::Make(kWidth, kHeight); } |
+ |
+ void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkXfermode::Mode mode, |
+ SkXfermode::Mode mode2) { |
+ const SkColor colors[] { |
+ SK_ColorRED, |
+ SK_ColorGREEN, |
+ SK_ColorBLUE, |
+ SK_ColorYELLOW, |
+ SK_ColorCYAN, |
+ SK_ColorMAGENTA, |
+ }; |
+ |
+ SkAutoTUnref<SkXfermode> xfermode(SkXfermode::Create(mode)); |
+ SkAutoTUnref<SkXfermode> xfermode2(SkXfermode::Create(mode2)); |
+ for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) { |
+ canvas->save(); |
+ canvas->translate(x, y); |
+ canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i); |
+ canvas->translate(-fBlob->bounds().width() / 2.0f + 0.5f, 0); |
+ |
+ SkPaint textPaint; |
+ textPaint.setColor(colors[i]); |
+ textPaint.setXfermode(i % 2 == 0 ? xfermode : xfermode2); |
+ canvas->drawTextBlob(fBlob, 0, 0, textPaint); |
+ canvas->restore(); |
+ } |
+ } |
+ |
+ void onDraw(SkCanvas* canvas) override { |
+ SkScalar offsetX = kWidth / 4.0f; |
+ SkScalar offsetY = kHeight / 4.0f; |
+ drawTestCase(canvas, offsetX, offsetY, SkXfermode::kSrc_Mode, SkXfermode::kSrc_Mode); |
+ drawTestCase(canvas, 3 * offsetX, offsetY, SkXfermode::kSrcOver_Mode, |
+ SkXfermode::kSrcOver_Mode); |
+ drawTestCase(canvas, offsetX, 3 * offsetY, SkXfermode::kHardLight_Mode, |
+ SkXfermode::kLuminosity_Mode); |
+ drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkXfermode::kSrcOver_Mode, |
+ SkXfermode::kSrc_Mode); |
+ } |
+ |
+private: |
+ SkScalar fTextHeight; |
+ SkAutoTUnref<const SkTextBlob> fBlob; |
+ typedef skiagm::GM INHERITED; |
+}; |
+ |
+////////////////////////////////////////////////////////////////////////////// |
+ |
+DEF_GM( return new LcdOverlapGM; ) |
+} |