Animated the PathUtils Sample to show path contours# Enter a description of the change.
Animated the PathUtils Sample to path contours
BUG=
R=reed@google.com, scroggo@google.com, djsollen@google.com
Author: dierk@google.com
Review URL: https://chromiumcodereview.appspot.com/18552005
git-svn-id: http://skia.googlecode.com/svn/trunk@9934 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SamplePathUtils.cpp b/samplecode/SamplePathUtils.cpp
index c5ed0e9..d7a7e54 100644
--- a/samplecode/SamplePathUtils.cpp
+++ b/samplecode/SamplePathUtils.cpp
@@ -6,28 +6,52 @@
*/
#include "SampleCode.h"
-#include "SkCanvas.h"
-#include "SkPathUtils.h"
-#include "SkView.h"
-//#include "SkPathOps.h" // loads fine here, won't in PathUtils src files
-#include "SkRandom.h"
-//#include "SkTime.h"
-class samplePathUtils : public SampleView {
+#include "SkCanvas.h"
+#include "SkCornerPathEffect.h"
+#include "SkDashPathEffect.h"
+#include "SkPathUtils.h"
+#include "SkRandom.h"
+#include "SkView.h"
+
+typedef void (*BitsToPath)(SkPath*, const char*, int, int, int);
+
+static const BitsToPath gBitsToPath_fns[] = {
+ SkPathUtils::BitsToPath_Path,
+ SkPathUtils::BitsToPath_Region,
+};
+
+// hardcoded bitmap patterns
+static const uint8_t gBits[][16] = {
+ { 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00,
+ 0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 },
+
+ { 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0,
+ 0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 },
+
+ { 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70,
+ 0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 }
+};
+
+
+class SamplePathUtils : public SampleView {
public:
- samplePathUtils() {
- bmp_paint.setAntiAlias(true); // Black paint for bitmap
- bmp_paint.setStyle(SkPaint::kFill_Style);
- bmp_paint.setColor(SK_ColorBLACK);
+ static const int fNumBits = 3;
+ static const int fH = 8, fW = 12;
+ static const size_t fRowBytes = 2;
+ static const int fNumChars = fH * fRowBytes;
+
+ SkPaint fBmpPaint;
+ SkScalar fPhase;
+
+ SamplePathUtils() {
+ fBmpPaint.setAntiAlias(true); // Black paint for bitmap
+ fBmpPaint.setStyle(SkPaint::kFill_Style);
+
+ fPhase = 0.0f; // to animate the dashed path
}
protected:
- static const int numModes = 3;
- static const int h=8, w=12, stride=2; // stride is in bytes
- static const int numChars = h * stride; // number of chars in entire array
-
- SkPaint bmp_paint;
-
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
@@ -40,41 +64,37 @@
/////////////////////////////////////////////////////////////
virtual void onDrawContent(SkCanvas* canvas) {
- // bitmap definitions
- const uint8_t bits[numModes][numChars] = {
- { 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00,
- 0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 },
+ SkScalar intervals[8] = {.5, .3, .5, .3, .5, .3, .5, .3};
+ SkDashPathEffect dash(intervals, 2, fPhase);
+ SkCornerPathEffect corner(.25f);
+ SkComposePathEffect compose(&dash, &corner);
- { 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0,
- 0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 },
+ SkPaint outlinePaint;
+ outlinePaint.setAntiAlias(true); // dashed paint for bitmap
+ outlinePaint.setStyle(SkPaint::kStroke_Style);
+ outlinePaint.setPathEffect(&compose);
- { 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70,
- 0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 }
- };
+ canvas->scale(10.0f, 10.0f); // scales up
- static const SkScalar kScale = 10.0f;
+ for (int i = 0; i < fNumBits; ++i) {
+ canvas->save();
+ for (size_t j = 0; j < SK_ARRAY_COUNT(gBitsToPath_fns); ++j) {
+ SkPath path;
+ gBitsToPath_fns[j](&path, (char*) &gBits[i], fW, fH, fRowBytes);
- for (int i = 0; i < numModes; ++i) {
- SkPath path; // generate and simplify each path
- SkPathUtils::BitsToPath_Path(&path, (char*) &bits[i], h, w, stride);
-
- canvas->save(); // DRAWING
- canvas->scale(kScale, kScale); // scales up each bitmap
- canvas->translate(0, 1.5f * h * i);
- canvas->drawPath(path, bmp_paint); // draw bitmap
+ //draw skPath and outline
+ canvas->drawPath(path, fBmpPaint);
+ canvas->translate(1.5f * fW, 0); // translates past previous bitmap
+ canvas->drawPath(path, outlinePaint);
+ canvas->translate(1.5f * fW, 0); // translates past previous bitmap
+ }
canvas->restore();
-
- // use the SkRegion method
- SkPath pathR;
- SkPathUtils::BitsToPath_Region(&pathR, (char*) &bits[i], h, w, stride);
-
- canvas->save();
-
- canvas->scale(kScale, kScale); // scales up each bitmap
- canvas->translate(1.5f * w, 1.5f * h * i); // translates past previous bitmap
- canvas->drawPath(pathR, bmp_paint); // draw bitmap
- canvas->restore();
+ canvas->translate(0, 1.5f * fH); //translate to next row
}
+
+ // for animated pathEffect
+ fPhase += .01;
+ this->inval(NULL);
}
private:
@@ -83,6 +103,6 @@
//////////////////////////////////////////////////////////////////////////////
-static SkView* MyFactory() { return new samplePathUtils; }
+static SkView* MyFactory() { return new SamplePathUtils; }
static SkViewRegister reg(MyFactory)
;