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
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@ -25,7 +25,7 @@ public:
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all binary data the path is simplified using the PathOps::Simplify() method.
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*/
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static void BitsToPath_Path(SkPath* path, const char* bitmap,
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int h, int w, int stride);
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int w, int h, int rowBytes);
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/**
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This variation utilizes the SkRegion class to generate paths, adding
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@ -33,7 +33,7 @@ public:
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of the binary the SkRegion is converted to a Path via getBoundaryPath().
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*/
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static void BitsToPath_Region(SkPath* path, const char* bitmap,
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int h, int w, int stride);
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int w, int h, int rowBytes);
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};
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@ -6,28 +6,52 @@
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*/
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#include "SampleCode.h"
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#include "SkCanvas.h"
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#include "SkPathUtils.h"
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#include "SkView.h"
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//#include "SkPathOps.h" // loads fine here, won't in PathUtils src files
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#include "SkRandom.h"
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//#include "SkTime.h"
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class samplePathUtils : public SampleView {
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#include "SkCanvas.h"
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#include "SkCornerPathEffect.h"
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#include "SkDashPathEffect.h"
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#include "SkPathUtils.h"
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#include "SkRandom.h"
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#include "SkView.h"
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typedef void (*BitsToPath)(SkPath*, const char*, int, int, int);
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static const BitsToPath gBitsToPath_fns[] = {
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SkPathUtils::BitsToPath_Path,
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SkPathUtils::BitsToPath_Region,
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};
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// hardcoded bitmap patterns
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static const uint8_t gBits[][16] = {
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{ 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00,
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0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 },
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{ 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0,
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0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 },
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{ 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70,
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0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 }
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};
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class SamplePathUtils : public SampleView {
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public:
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samplePathUtils() {
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bmp_paint.setAntiAlias(true); // Black paint for bitmap
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bmp_paint.setStyle(SkPaint::kFill_Style);
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bmp_paint.setColor(SK_ColorBLACK);
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static const int fNumBits = 3;
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static const int fH = 8, fW = 12;
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static const size_t fRowBytes = 2;
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static const int fNumChars = fH * fRowBytes;
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SkPaint fBmpPaint;
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SkScalar fPhase;
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SamplePathUtils() {
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fBmpPaint.setAntiAlias(true); // Black paint for bitmap
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fBmpPaint.setStyle(SkPaint::kFill_Style);
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fPhase = 0.0f; // to animate the dashed path
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}
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protected:
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static const int numModes = 3;
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static const int h=8, w=12, stride=2; // stride is in bytes
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static const int numChars = h * stride; // number of chars in entire array
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SkPaint bmp_paint;
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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@ -40,41 +64,37 @@ protected:
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/////////////////////////////////////////////////////////////
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virtual void onDrawContent(SkCanvas* canvas) {
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// bitmap definitions
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const uint8_t bits[numModes][numChars] = {
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{ 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00,
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0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 },
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SkScalar intervals[8] = {.5, .3, .5, .3, .5, .3, .5, .3};
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SkDashPathEffect dash(intervals, 2, fPhase);
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SkCornerPathEffect corner(.25f);
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SkComposePathEffect compose(&dash, &corner);
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{ 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0,
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0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 },
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SkPaint outlinePaint;
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outlinePaint.setAntiAlias(true); // dashed paint for bitmap
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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outlinePaint.setPathEffect(&compose);
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{ 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70,
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0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 }
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};
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canvas->scale(10.0f, 10.0f); // scales up
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static const SkScalar kScale = 10.0f;
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for (int i = 0; i < fNumBits; ++i) {
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canvas->save();
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for (size_t j = 0; j < SK_ARRAY_COUNT(gBitsToPath_fns); ++j) {
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SkPath path;
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gBitsToPath_fns[j](&path, (char*) &gBits[i], fW, fH, fRowBytes);
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for (int i = 0; i < numModes; ++i) {
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SkPath path; // generate and simplify each path
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SkPathUtils::BitsToPath_Path(&path, (char*) &bits[i], h, w, stride);
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canvas->save(); // DRAWING
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canvas->scale(kScale, kScale); // scales up each bitmap
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canvas->translate(0, 1.5f * h * i);
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canvas->drawPath(path, bmp_paint); // draw bitmap
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canvas->restore();
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// use the SkRegion method
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SkPath pathR;
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SkPathUtils::BitsToPath_Region(&pathR, (char*) &bits[i], h, w, stride);
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canvas->save();
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canvas->scale(kScale, kScale); // scales up each bitmap
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canvas->translate(1.5f * w, 1.5f * h * i); // translates past previous bitmap
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canvas->drawPath(pathR, bmp_paint); // draw bitmap
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//draw skPath and outline
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canvas->drawPath(path, fBmpPaint);
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canvas->translate(1.5f * fW, 0); // translates past previous bitmap
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canvas->drawPath(path, outlinePaint);
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canvas->translate(1.5f * fW, 0); // translates past previous bitmap
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}
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canvas->restore();
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canvas->translate(0, 1.5f * fH); //translate to next row
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}
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// for animated pathEffect
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fPhase += .01;
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this->inval(NULL);
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}
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private:
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@ -83,6 +103,6 @@ private:
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new samplePathUtils; }
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static SkView* MyFactory() { return new SamplePathUtils; }
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static SkViewRegister reg(MyFactory)
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;
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@ -97,19 +97,19 @@ static void Line2path_span(SkPath* path, const char* line,
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void SkPathUtils::BitsToPath_Path(SkPath* path,
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const char* bitmap,
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int h, int w, int stride) {
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int w, int h, int stride) {
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// loop for every line in bitmap
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for (int i = 0; i < h; ++i) {
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// fn ptr handles each line separately
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//l2p_fn(path, &bitmap[i*stride], i, w);
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Line2path_span(path, &bitmap[i*stride], i, w);
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}
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Simplify(*path, path); // simplify resulting bitmap
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Simplify(*path, path); // simplify resulting path.
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}
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void SkPathUtils::BitsToPath_Region(SkPath* path,
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const char* bitmap,
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int h, int w, int stride) {
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int w, int h, int stride) {
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SkRegion region;
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// loop for each line
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