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skia2/samplecode/SampleSlides.cpp
commit-bot@chromium.org f792a1b207 Builder class for SkLayerRasterizer. 
Provide builder class to make SkLayerRasterizer immutable. We have to keep the
addLayer() methods for now because they are used in Chrome. They will be removed
once this changed has been rolled into Chrome.
An added benefit of this is that this class can only be allocated on the heap.

BUG=skia:2187
R=reed@google.com, scroggo@google.com, mtklein@google.com

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/176873004

git-svn-id: http://skia.googlecode.com/svn/trunk@13590 2bbb7eff-a529-9590-31e7-b0007b416f81
2014-02-26 13:27:37 +00:00

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/*
* 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 "SampleCode.h"
#include "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkGradientShader.h"
#include "SkLayerRasterizer.h"
#include "SkPaint.h"
#include "SkView.h"
#define BG_COLOR 0xFFDDDDDD
typedef void (*SlideProc)(SkCanvas*);
///////////////////////////////////////////////////////////////////////////////
#include "Sk1DPathEffect.h"
#include "Sk2DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkDashPathEffect.h"
#include "SkDiscretePathEffect.h"
static void compose_pe(SkPaint* paint) {
SkPathEffect* pe = paint->getPathEffect();
SkPathEffect* corner = SkCornerPathEffect::Create(25);
SkPathEffect* compose;
if (pe) {
compose = SkComposePathEffect::Create(pe, corner);
corner->unref();
} else {
compose = corner;
}
paint->setPathEffect(compose)->unref();
}
static void hair_pe(SkPaint* paint) {
paint->setStrokeWidth(0);
}
static void hair2_pe(SkPaint* paint) {
paint->setStrokeWidth(0);
compose_pe(paint);
}
static void stroke_pe(SkPaint* paint) {
paint->setStrokeWidth(12);
compose_pe(paint);
}
static void dash_pe(SkPaint* paint) {
SkScalar inter[] = { 20, 10, 10, 10 };
paint->setStrokeWidth(12);
paint->setPathEffect(SkDashPathEffect::Create(inter, SK_ARRAY_COUNT(inter),
0))->unref();
compose_pe(paint);
}
static const int gXY[] = {
4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
};
static void scale(SkPath* path, SkScalar scale) {
SkMatrix m;
m.setScale(scale, scale);
path->transform(m);
}
static void one_d_pe(SkPaint* paint) {
SkPath path;
path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
path.close();
path.offset(SkIntToScalar(-6), 0);
scale(&path, 1.5f);
paint->setPathEffect(SkPath1DPathEffect::Create(path, SkIntToScalar(21), 0,
SkPath1DPathEffect::kRotate_Style))->unref();
compose_pe(paint);
}
typedef void (*PE_Proc)(SkPaint*);
static const PE_Proc gPE[] = { hair_pe, hair2_pe, stroke_pe, dash_pe, one_d_pe };
static void fill_pe(SkPaint* paint) {
paint->setStyle(SkPaint::kFill_Style);
paint->setPathEffect(NULL);
}
static void discrete_pe(SkPaint* paint) {
paint->setPathEffect(SkDiscretePathEffect::Create(10, 4))->unref();
}
static SkPathEffect* MakeTileEffect() {
SkMatrix m;
m.setScale(SkIntToScalar(12), SkIntToScalar(12));
SkPath path;
path.addCircle(0, 0, SkIntToScalar(5));
return SkPath2DPathEffect::Create(m, path);
}
static void tile_pe(SkPaint* paint) {
paint->setPathEffect(MakeTileEffect())->unref();
}
static const PE_Proc gPE2[] = { fill_pe, discrete_pe, tile_pe };
static void patheffect_slide(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
SkPath path;
path.moveTo(20, 20);
path.lineTo(70, 120);
path.lineTo(120, 30);
path.lineTo(170, 80);
path.lineTo(240, 50);
size_t i;
canvas->save();
for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
gPE[i](&paint);
canvas->drawPath(path, paint);
canvas->translate(0, 75);
}
canvas->restore();
path.reset();
SkRect r = { 0, 0, 250, 120 };
path.addOval(r, SkPath::kCW_Direction);
r.inset(50, 50);
path.addRect(r, SkPath::kCCW_Direction);
canvas->translate(320, 20);
for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) {
gPE2[i](&paint);
canvas->drawPath(path, paint);
canvas->translate(0, 160);
}
}
///////////////////////////////////////////////////////////////////////////////
#include "SkGradientShader.h"
struct GradData {
int fCount;
const SkColor* fColors;
const SkScalar* fPos;
};
static const SkColor gColors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
};
static const SkScalar gPos0[] = { 0, SK_Scalar1 };
static const SkScalar gPos1[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
static const SkScalar gPos2[] = {
0, SK_Scalar1/8, SK_Scalar1/2, SK_Scalar1*7/8, SK_Scalar1
};
static const GradData gGradData[] = {
{ 2, gColors, NULL },
{ 2, gColors, gPos0 },
{ 2, gColors, gPos1 },
{ 5, gColors, NULL },
{ 5, gColors, gPos2 }
};
static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, SkUnitMapper* mapper) {
return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos,
data.fCount, tm, mapper);
}
static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, SkUnitMapper* mapper) {
SkPoint center;
center.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
return SkGradientShader::CreateRadial(center, center.fX, data.fColors,
data.fPos, data.fCount, tm, mapper);
}
static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, SkUnitMapper* mapper) {
SkPoint center;
center.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors,
data.fPos, data.fCount, mapper);
}
static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, SkUnitMapper* mapper) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::CreateTwoPointRadial(
center1, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm, mapper);
}
typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, SkUnitMapper* mapper);
static const GradMaker gGradMakers[] = {
MakeLinear, MakeRadial, MakeSweep, Make2Radial
};
static void gradient_slide(SkCanvas* canvas) {
SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(100), SkIntToScalar(100) }
};
SkShader::TileMode tm = SkShader::kClamp_TileMode;
SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
SkPaint paint;
paint.setAntiAlias(true);
paint.setDither(true);
canvas->translate(SkIntToScalar(20), SkIntToScalar(10));
for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
canvas->save();
for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) {
SkShader* shader = gGradMakers[j](pts, gGradData[i], tm, NULL);
paint.setShader(shader);
canvas->drawRect(r, paint);
shader->unref();
canvas->translate(0, SkIntToScalar(120));
}
canvas->restore();
canvas->translate(SkIntToScalar(120), 0);
}
}
///////////////////////////////////////////////////////////////////////////////
#include "SkPathMeasure.h"
static SkScalar getpathlen(const SkPath& path) {
SkPathMeasure meas(path, false);
return meas.getLength();
}
static void textonpath_slide(SkCanvas* canvas) {
const char* text = "Displacement";
size_t len =strlen(text);
SkPath path;
path.moveTo(100, 300);
path.quadTo(300, 100, 500, 300);
path.offset(0, -100);
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(40);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(path, paint);
paint.setStyle(SkPaint::kFill_Style);
SkScalar x = 50;
paint.setColor(0xFF008800);
canvas->drawTextOnPathHV(text, len, path,
x, paint.getTextSize()*2/3, paint);
paint.setColor(SK_ColorRED);
canvas->drawTextOnPathHV(text, len, path,
x + 60, 0, paint);
paint.setColor(SK_ColorBLUE);
canvas->drawTextOnPathHV(text, len, path,
x + 120, -paint.getTextSize()*2/3, paint);
path.offset(0, 200);
paint.setTextAlign(SkPaint::kRight_Align);
text = "Matrices";
len = strlen(text);
SkScalar pathLen = getpathlen(path);
SkMatrix matrix;
paint.setColor(SK_ColorBLACK);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(path, paint);
paint.setStyle(SkPaint::kFill_Style);
paint.setTextSize(50);
canvas->drawTextOnPath(text, len, path, NULL, paint);
paint.setColor(SK_ColorRED);
matrix.setScale(-SK_Scalar1, SK_Scalar1);
matrix.postTranslate(pathLen, 0);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
paint.setColor(SK_ColorBLUE);
matrix.setScale(SK_Scalar1, -SK_Scalar1);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
paint.setColor(0xFF008800);
matrix.setScale(-SK_Scalar1, -SK_Scalar1);
matrix.postTranslate(pathLen, 0);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
}
///////////////////////////////////////////////////////////////////////////////
#include "SkImageDecoder.h"
#include "SkOSFile.h"
#include "SkRandom.h"
#include "SkStream.h"
static SkShader* make_shader0(SkIPoint* size) {
SkBitmap bm;
SkImageDecoder::DecodeFile("/skimages/logo.gif", &bm);
size->set(bm.width(), bm.height());
return SkShader::CreateBitmapShader(bm, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
}
static SkShader* make_shader1(const SkIPoint& size) {
SkPoint pts[] = { { 0, 0 },
{ SkIntToScalar(size.fX), SkIntToScalar(size.fY) } };
SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorRED };
return SkGradientShader::CreateLinear(pts, colors, NULL,
SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode, NULL);
}
class Rec {
public:
SkCanvas::VertexMode fMode;
int fCount;
SkPoint* fVerts;
SkPoint* fTexs;
Rec() : fCount(0), fVerts(NULL), fTexs(NULL) {}
~Rec() { delete[] fVerts; delete[] fTexs; }
};
static void make_tris(Rec* rec) {
int n = 10;
SkRandom rand;
rec->fMode = SkCanvas::kTriangles_VertexMode;
rec->fCount = n * 3;
rec->fVerts = new SkPoint[rec->fCount];
for (int i = 0; i < n; i++) {
SkPoint* v = &rec->fVerts[i*3];
for (int j = 0; j < 3; j++) {
v[j].set(rand.nextUScalar1() * 250, rand.nextUScalar1() * 250);
}
}
}
static void make_fan(Rec* rec, int texWidth, int texHeight) {
const SkScalar tx = SkIntToScalar(texWidth);
const SkScalar ty = SkIntToScalar(texHeight);
const int n = 24;
rec->fMode = SkCanvas::kTriangleFan_VertexMode;
rec->fCount = n + 2;
rec->fVerts = new SkPoint[rec->fCount];
rec->fTexs = new SkPoint[rec->fCount];
SkPoint* v = rec->fVerts;
SkPoint* t = rec->fTexs;
v[0].set(0, 0);
t[0].set(0, 0);
for (int i = 0; i < n; i++) {
SkScalar cos;
SkScalar sin = SkScalarSinCos(SK_ScalarPI * 2 * i / n, &cos);
v[i+1].set(cos, sin);
t[i+1].set(i*tx/n, ty);
}
v[n+1] = v[1];
t[n+1].set(tx, ty);
SkMatrix m;
m.setScale(SkIntToScalar(100), SkIntToScalar(100));
m.postTranslate(SkIntToScalar(110), SkIntToScalar(110));
m.mapPoints(v, rec->fCount);
}
static void make_strip(Rec* rec, int texWidth, int texHeight) {
const SkScalar tx = SkIntToScalar(texWidth);
const SkScalar ty = SkIntToScalar(texHeight);
const int n = 24;
rec->fMode = SkCanvas::kTriangleStrip_VertexMode;
rec->fCount = 2 * (n + 1);
rec->fVerts = new SkPoint[rec->fCount];
rec->fTexs = new SkPoint[rec->fCount];
SkPoint* v = rec->fVerts;
SkPoint* t = rec->fTexs;
for (int i = 0; i < n; i++) {
SkScalar cos;
SkScalar sin = SkScalarSinCos(SK_ScalarPI * 2 * i / n, &cos);
v[i*2 + 0].set(cos/2, sin/2);
v[i*2 + 1].set(cos, sin);
t[i*2 + 0].set(tx * i / n, ty);
t[i*2 + 1].set(tx * i / n, 0);
}
v[2*n + 0] = v[0];
v[2*n + 1] = v[1];
t[2*n + 0].set(tx, ty);
t[2*n + 1].set(tx, 0);
SkMatrix m;
m.setScale(SkIntToScalar(100), SkIntToScalar(100));
m.postTranslate(SkIntToScalar(110), SkIntToScalar(110));
m.mapPoints(v, rec->fCount);
}
static void mesh_slide(SkCanvas* canvas) {
Rec fRecs[3];
SkIPoint size;
SkShader* fShader0 = make_shader0(&size);
SkShader* fShader1 = make_shader1(size);
SkAutoUnref aur0(fShader0);
SkAutoUnref aur1(fShader1);
make_strip(&fRecs[0], size.fX, size.fY);
make_fan(&fRecs[1], size.fX, size.fY);
make_tris(&fRecs[2]);
SkPaint paint;
paint.setDither(true);
paint.setFilterLevel(SkPaint::kLow_FilterLevel);
for (size_t i = 0; i < SK_ARRAY_COUNT(fRecs); i++) {
canvas->save();
paint.setShader(NULL);
canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount,
fRecs[i].fVerts, fRecs[i].fTexs,
NULL, NULL, NULL, 0, paint);
canvas->translate(SkIntToScalar(210), 0);
paint.setShader(fShader0);
canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount,
fRecs[i].fVerts, fRecs[i].fTexs,
NULL, NULL, NULL, 0, paint);
canvas->translate(SkIntToScalar(210), 0);
paint.setShader(fShader1);
canvas->drawVertices(fRecs[i].fMode, fRecs[i].fCount,
fRecs[i].fVerts, fRecs[i].fTexs,
NULL, NULL, NULL, 0, paint);
canvas->restore();
canvas->translate(0, SkIntToScalar(250));
}
}
///////////////////////////////////////////////////////////////////////////////
static void r0(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
p.setMaskFilter(SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))))->unref();
rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
p.setMaskFilter(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rastBuilder->addLayer(p);
p.setAlpha(0x11);
p.setStyle(SkPaint::kFill_Style);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
rastBuilder->addLayer(p);
}
static void r1(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
rastBuilder->addLayer(p);
p.setAlpha(0x40);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*2);
rastBuilder->addLayer(p);
}
static void r2(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
p.setStyle(SkPaint::kStrokeAndFill_Style);
p.setStrokeWidth(SK_Scalar1*4);
rastBuilder->addLayer(p);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*3/2);
p.setXfermodeMode(SkXfermode::kClear_Mode);
rastBuilder->addLayer(p);
}
static void r3(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1*3);
rastBuilder->addLayer(p);
p.setAlpha(0x20);
p.setStyle(SkPaint::kFill_Style);
p.setXfermodeMode(SkXfermode::kSrc_Mode);
rastBuilder->addLayer(p);
}
static void r4(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
p.setAlpha(0x60);
rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
p.setAlpha(0xFF);
p.setXfermodeMode(SkXfermode::kClear_Mode);
rastBuilder->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
p.setXfermode(NULL);
rastBuilder->addLayer(p);
}
#include "SkDiscretePathEffect.h"
static void r5(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
rastBuilder->addLayer(p);
p.setPathEffect(SkDiscretePathEffect::Create(SK_Scalar1*4, SK_Scalar1*3))->unref();
p.setXfermodeMode(SkXfermode::kSrcOut_Mode);
rastBuilder->addLayer(p);
}
static void r6(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
rastBuilder->addLayer(p);
p.setAntiAlias(false);
SkLayerRasterizer::Builder rastBuilder2;
r5(&rastBuilder2, p);
p.setRasterizer(rastBuilder2.detachRasterizer())->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rastBuilder->addLayer(p);
}
#include "Sk2DPathEffect.h"
static SkPathEffect* MakeDotEffect(SkScalar radius, const SkMatrix& matrix) {
SkPath path;
path.addCircle(0, 0, radius);
return SkPath2DPathEffect::Create(matrix, path);
}
static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
SkMatrix lattice;
lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
p.setPathEffect(MakeDotEffect(SK_Scalar1*4, lattice))->unref();
rastBuilder->addLayer(p);
}
static void r8(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
rastBuilder->addLayer(p);
SkMatrix lattice;
lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
p.setPathEffect(MakeDotEffect(SK_Scalar1*2, lattice))->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rastBuilder->addLayer(p);
p.setPathEffect(NULL);
p.setXfermode(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rastBuilder->addLayer(p);
}
static void r9(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p)
{
rastBuilder->addLayer(p);
SkMatrix lattice;
lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0);
lattice.postRotate(SkIntToScalar(30), 0, 0);
p.setPathEffect(SkLine2DPathEffect::Create(SK_Scalar1*2, lattice))->unref();
p.setXfermodeMode(SkXfermode::kClear_Mode);
rastBuilder->addLayer(p);
p.setPathEffect(NULL);
p.setXfermode(NULL);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
rastBuilder->addLayer(p);
}
typedef void (*raster_proc)(SkLayerRasterizer::Builder*, SkPaint&);
static const raster_proc gRastProcs[] = {
r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
};
static void apply_shader(SkPaint* paint, int index) {
raster_proc proc = gRastProcs[index];
SkPaint p;
SkLayerRasterizer::Builder rastBuilder;
p.setAntiAlias(true);
proc(&rastBuilder, p);
paint->setRasterizer(rastBuilder.detachRasterizer())->unref();
paint->setColor(SK_ColorBLUE);
}
#include "SkTypeface.h"
static void texteffect_slide(SkCanvas* canvas) {
const char* str = "Google";
size_t len = strlen(str);
SkScalar x = 20;
SkScalar y = 80;
SkPaint paint;
paint.setTypeface(SkTypeface::CreateFromName("Georgia", SkTypeface::kItalic));
paint.setTextSize(75);
paint.setAntiAlias(true);
paint.setColor(SK_ColorBLUE);
for (size_t i = 0; i < SK_ARRAY_COUNT(gRastProcs); i++) {
apply_shader(&paint, (int)i);
canvas->drawText(str, len, x, y, paint);
y += 80;
if (i == 4) {
x += 320;
y = 80;
}
}
}
///////////////////////////////////////////////////////////////////////////////
#include "SkImageEncoder.h"
static const SlideProc gProc[] = {
patheffect_slide,
gradient_slide,
textonpath_slide,
mesh_slide,
texteffect_slide
};
class SlideView : public SampleView {
int fIndex;
bool fOnce;
public:
SlideView() {
fOnce = false;
}
void init() {
if (fOnce) {
return;
}
fOnce = true;
fIndex = 0;
SkBitmap bm;
bm.allocN32Pixels(1024, 768);
SkCanvas canvas(bm);
SkScalar s = SkIntToScalar(1024) / 640;
canvas.scale(s, s);
for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); i++) {
canvas.save();
canvas.drawColor(BG_COLOR);
gProc[i](&canvas);
canvas.restore();
SkString str;
str.printf("/skimages/slide_" SK_SIZE_T_SPECIFIER ".png", i);
SkImageEncoder::EncodeFile(str.c_str(), bm, SkImageEncoder::kPNG_Type, 100);
}
this->setBGColor(BG_COLOR);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Slides");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
this->init();
gProc[fIndex](canvas);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
this->init();
fIndex = (fIndex + 1) % SK_ARRAY_COUNT(gProc);
this->inval(NULL);
return NULL;
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new SlideView; }
static SkViewRegister reg(MyFactory);
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