add test gm for vertical text

git-svn-id: http://skia.googlecode.com/svn/trunk@2661 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 90 insertions, 0 deletions

diff --git a/gm/verttext.cpp b/gm/verttext.cpp
new file mode 100644
index 0000000000..90fa5cfbec
--- /dev/null
+++ b/gm/verttext.cpp
@@ -0,0 +1,90 @@
+/*
+ * 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"
+
+namespace skiagm {
+
+#define TEXT_SIZE   48
+static const char gText[] = "Hello";
+static const size_t gLen = sizeof(gText) - 1;
+
+class VertTextGM : public GM {
+public:
+    VertTextGM() {}
+
+protected:
+
+    SkString onShortName() {
+        return SkString(" verttext");
+    }
+
+    SkISize onISize() { return make_isize(640, 480); }
+
+    static void drawBaseline(SkCanvas* canvas, const SkPaint& paint,
+                             SkScalar x, SkScalar y) {
+        SkScalar total = paint.measureText(gText, gLen);
+
+        SkPaint p;
+        p.setAntiAlias(true);
+        p.setColor(0x80FF0000);
+        canvas->drawLine(x, y,
+                         paint.isVerticalText() ? x : x + total,
+                         paint.isVerticalText() ? y + total : y,
+                         p);
+
+        p.setColor(0xFF0000FF);
+        SkScalar adv[gLen];
+        paint.getTextWidths(gText, gLen, adv, NULL);
+        for (size_t i = 0; i < gLen; ++i) {
+            canvas->drawCircle(x, y, SK_Scalar1 * 3 / 2, p);
+            if (paint.isVerticalText()) {
+                y += adv[i];
+            } else {
+                x += adv[i];
+            }
+        }
+        canvas->drawCircle(x, y, SK_Scalar1 * 3 / 2, p);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkScalar x = SkIntToScalar(100);
+        SkScalar y = SkIntToScalar(50);
+        
+        for (int i = 0; i < 4; ++i) {
+            SkPaint     paint;
+            paint.setAntiAlias(true);
+            paint.setTextSize(SkIntToScalar(TEXT_SIZE));
+
+
+            paint.setVerticalText(false);
+            drawBaseline(canvas, paint, x, y);
+            canvas->drawText(gText, gLen, x, y, paint);
+
+            paint.setVerticalText(true);
+            drawBaseline(canvas, paint, x, y);
+            canvas->drawText(gText, gLen, x, y, paint);
+            
+            x += SkIntToScalar(40);
+            y += SkIntToScalar(120);
+
+            canvas->rotate(SkIntToScalar(-15));
+        }
+    }
+
+private:
+    typedef GM INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new VertTextGM; }
+static GMRegistry reg(MyFactory);
+
+}