skia2/samplecode/SampleVertices.cpp
reed@android.com da342a8917 update more sample code to new compose shader header
git-svn-id: http://skia.googlecode.com/svn/trunk@48 2bbb7eff-a529-9590-31e7-b0007b416f81
2008-12-23 18:37:08 +00:00

279 lines
8.2 KiB
C++

#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkPorterDuff.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkImageRef.h"
#include "SkOSFile.h"
#include "SkStream.h"
#include "SkNinePatch.h"
void setup_vertexbug(SkPoint verts[], SkPoint texs[], uint16_t index[]);
static void drawbug(SkCanvas* canvas, SkScalar scale) {
SkBitmap bm, bm2;
SkImageDecoder::DecodeFile("/skimages/btn_default_normal.9.png", &bm);
SkPaint paint;
SkIRect subset;
subset.set(1, 1, bm.width() - 1, bm.height() - 1);
bm.extractSubset(&bm2, subset);
#if 0
SkPoint verts[16], texs[16];
uint16_t index[54];
SkShader* s = SkShader::CreateBitmapShader(bm2, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
paint.setShader(s)->unref();
setup_vertexbug(verts, texs, index);
int indexCount = 6; // 54
canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 16, verts, texs,
NULL, NULL, &index[6], indexCount, paint);
#if 0
paint.setShader(NULL);
canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 16, verts, NULL,
NULL, NULL, index, indexCount, paint);
#endif
#else
SkRect dst;
SkIRect margin;
dst.set(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(100) + scale,
SkIntToScalar(40) + scale);
margin.set(9, 9, 9, 9);
SkNinePatch::DrawNine(canvas, dst, bm2, margin, NULL);
#endif
}
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 VerticesView : public SkView {
SkShader* fShader0;
SkShader* fShader1;
public:
VerticesView() {
SkIPoint size;
fShader0 = make_shader0(&size);
fShader1 = make_shader1(size);
make_strip(&fRecs[0], size.fX, size.fY);
make_fan(&fRecs[1], size.fX, size.fY);
make_tris(&fRecs[2]);
fScale = SK_Scalar1;
}
virtual ~VerticesView() {
fShader0->safeUnref();
fShader1->safeUnref();
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt))
{
SkString str("Vertices");
SampleCode::TitleR(evt, str.c_str());
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(SK_ColorGRAY);
}
SkScalar fScale;
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
#if 1
canvas->drawColor(SK_ColorWHITE);
canvas->translate(SK_Scalar1/2, SkIntToScalar(15) + SK_Scalar1/2);
canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
drawbug(canvas, fScale);
fScale += SK_Scalar1/93;
this->inval(NULL);
return;
#endif
SkPaint paint;
paint.setDither(true);
paint.setFilterBitmap(true);
for (int 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(250), 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(250), 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));
}
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
return new Click(this);
}
virtual bool onClick(Click* click) {
// fCurrX = click->fICurr.fX;
// fCurrY = click->fICurr.fY;
this->inval(NULL);
return true;
}
private:
struct Rec {
SkCanvas::VertexMode fMode;
int fCount;
SkPoint* fVerts;
SkPoint* fTexs;
Rec() : fCount(0), fVerts(NULL), fTexs(NULL) {}
~Rec() { delete[] fVerts; delete[] fTexs; }
};
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);
}
}
}
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);
}
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);
}
Rec fRecs[3];
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new VerticesView; }
static SkViewRegister reg(MyFactory);