Add GM that tests bmp filter qualities with repeat mode
TBR=reed@google.com
Review URL: https://codereview.chromium.org/1086203002
diff --git a/gm/bmpfilterqualityrepeat.cpp b/gm/bmpfilterqualityrepeat.cpp
new file mode 100644
index 0000000..f533860
--- /dev/null
+++ b/gm/bmpfilterqualityrepeat.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2015 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 "SkShader.h"
+
+// Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap
+// such that it is stretched and repeat tiled with different filter qualities. It is testing whether
+// the bmp filter respects the repeat mode at the tile seams.
+class BmpFilterQualityRepeat : public skiagm::GM {
+public:
+ BmpFilterQualityRepeat() { this->setBGColor(0xFFCCBBAA); }
+
+protected:
+
+ void onOnceBeforeDraw() override {
+ fBmp.allocN32Pixels(40, 40, true);
+ SkCanvas canvas(fBmp);
+ SkBitmap colorBmp;
+ colorBmp.allocN32Pixels(20, 20, true);
+ colorBmp.eraseColor(0xFFFF0000);
+ canvas.drawBitmap(colorBmp, 0, 0);
+ colorBmp.eraseColor(0xFF008200);
+ canvas.drawBitmap(colorBmp, 20, 0);
+ colorBmp.eraseColor(0xFFFF9000);
+ canvas.drawBitmap(colorBmp, 0, 20);
+ colorBmp.eraseColor(0xFF2000FF);
+ canvas.drawBitmap(colorBmp, 20, 20);
+ }
+
+ SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); }
+
+ SkISize onISize() override { return SkISize::Make(810, 235); }
+
+ void onDraw(SkCanvas* canvas) override {
+
+ static const struct {
+ SkFilterQuality fQuality;
+ const char* fName;
+ } kQualities[] = {
+ {kNone_SkFilterQuality, "none"},
+ {kLow_SkFilterQuality, "low"},
+ {kMedium_SkFilterQuality, "medium"},
+ {kHigh_SkFilterQuality, "high"},
+ };
+
+ for (size_t q = 0; q < SK_ARRAY_COUNT(kQualities); ++q) {
+ SkPaint paint;
+ paint.setFilterQuality(kQualities[q].fQuality);
+ SkPaint bmpPaint(paint);
+ SkMatrix lm = SkMatrix::I();
+ lm.setScaleX(2.5);
+ lm.setTranslateX(423);
+ lm.setTranslateY(330);
+
+ static const SkShader::TileMode kTM = SkShader::kRepeat_TileMode;
+ bmpPaint.setShader(SkShader::CreateBitmapShader(fBmp, kTM, kTM, &lm))->unref();
+ SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
+ canvas->drawRect(rect, bmpPaint);
+ paint.setAntiAlias(true);
+ canvas->drawText(kQualities[q].fName, strlen(kQualities[q].fName), 20, 40, paint);
+ canvas->translate(250, 0);
+ }
+ }
+
+private:
+ SkBitmap fBmp;
+
+ typedef skiagm::GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return SkNEW(BmpFilterQualityRepeat); )