grab from latest android
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleMeasure.cpp b/samplecode/SampleMeasure.cpp
new file mode 100644
index 0000000..3cc0c81
--- /dev/null
+++ b/samplecode/SampleMeasure.cpp
@@ -0,0 +1,139 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkPath.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkUtils.h"
+#include "SkShaderExtras.h"
+#include "Sk1DPathEffect.h"
+#include "SkCornerPathEffect.h"
+#include "SkPathMeasure.h"
+#include "SkRandom.h"
+#include "SkColorPriv.h"
+#include "SkColorFilter.h"
+#include "SkDither.h"
+
+// exercise scale/linear/devkern
+struct Setting {
+ SkScalar fScale;
+ bool fLinearText;
+ bool fDevKernText;
+};
+
+static const SkScalar ONE = SkIntToScalar(9999)/10000;
+
+static const Setting gSettings[] = {
+ { 0, false, false },
+ { 0, false, true },
+ { 0, true, false },
+ { 0, true, true },
+ { ONE, false, false },
+ { ONE, false, true },
+ { ONE, true, false },
+ { ONE, true, true }
+};
+
+static void doMeasure(SkCanvas* canvas, const SkPaint& paint, const char text[])
+{
+ SkScalar dy = paint.getFontMetrics(NULL);
+
+ size_t len = strlen(text);
+ SkAutoTMalloc<SkScalar> autoWidths(len);
+ SkScalar* widths = autoWidths.get();
+ SkAutoTMalloc<SkRect> autoRects(len);
+ SkRect* rects = autoRects.get();
+ SkRect bounds;
+
+ SkPaint p(paint);
+ for (int i = 0; i < SK_ARRAY_COUNT(gSettings); i++) {
+ p.setLinearText(gSettings[i].fLinearText);
+ p.setDevKernText(gSettings[i].fDevKernText);
+ SkScalar scale = gSettings[i].fScale;
+
+ int n = p.getTextWidths(text, len, widths, rects);
+ SkScalar w = p.measureText(text, len, &bounds, scale);
+
+ p.setStyle(SkPaint::kFill_Style);
+ p.setColor(0x8888FF88);
+ canvas->drawRect(bounds, p);
+ p.setColor(0xFF000000);
+ canvas->drawText(text, len, 0, 0, p);
+
+ p.setStyle(SkPaint::kStroke_Style);
+ p.setStrokeWidth(0);
+ p.setColor(0xFFFF0000);
+ SkScalar x = 0;
+ for (int j = 0; j < n; j++) {
+ SkRect r = rects[j];
+ r.offset(x, 0);
+ canvas->drawRect(r, p);
+ x += widths[j];
+ }
+
+ p.setColor(0xFF0000FF);
+ canvas->drawLine(0, 0, w, 0, p);
+ p.setStrokeWidth(SkIntToScalar(4));
+ canvas->drawPoint(x, 0, p);
+
+ canvas->translate(0, dy);
+ }
+}
+
+class MeasureView : public SkView {
+public:
+ SkPaint fPaint;
+
+ MeasureView()
+ {
+ fPaint.setAntiAlias(true);
+ fPaint.setTextSize(SkIntToScalar(64));
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt)
+ {
+ if (SampleCode::TitleQ(*evt))
+ {
+ SampleCode::TitleR(evt, "Measure");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas)
+ {
+ canvas->drawColor(0xFFDDDDDD);
+ }
+
+ virtual void onDraw(SkCanvas* canvas)
+ {
+ this->drawBG(canvas);
+
+ canvas->translate(fPaint.getTextSize(), fPaint.getTextSize());
+ doMeasure(canvas, fPaint, "Hamburgefons");
+ }
+
+ virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
+ {
+ // fSweep += SK_Scalar1;
+ this->inval(NULL);
+ return this->INHERITED::onFindClickHandler(x, y);
+ }
+
+ virtual bool onClick(Click* click)
+ {
+ return this->INHERITED::onClick(click);
+ }
+
+private:
+ typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new MeasureView; }
+static SkViewRegister reg(MyFactory);
+