blob: 45637033d5153ed469479134efa9041dd39b58d6 [file] [log] [blame]
/*
* 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 "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkVertices.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkRandom.h"
#include "samplecode/Sample.h"
#include "src/utils/SkUTF.h"
#include "include/core/SkStream.h"
#include "src/core/SkOSFile.h"
static sk_sp<SkShader> make_shader0(SkIPoint* size) {
SkBitmap bm;
size->set(2, 2);
SkPMColor color0 = SkPreMultiplyARGB(0x80, 0x80, 0xff, 0x80);
SkPMColor color1 = SkPreMultiplyARGB(0x40, 0xff, 0x00, 0xff);
bm.allocN32Pixels(size->fX, size->fY);
bm.eraseColor(color0);
uint32_t* pixels = (uint32_t*) bm.getPixels();
pixels[0] = pixels[2] = color0;
pixels[1] = pixels[3] = color1;
return bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat);
}
static sk_sp<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::MakeLinear(pts, colors, nullptr,
SK_ARRAY_COUNT(colors), SkTileMode::kMirror);
}
class VerticesView : public Sample {
sk_sp<SkShader> fShader0;
sk_sp<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;
this->setBGColor(SK_ColorGRAY);
}
protected:
SkString name() override { return SkString("Vertices"); }
SkScalar fScale;
void onDrawContent(SkCanvas* canvas) override {
SkPaint paint;
paint.setDither(true);
paint.setFilterQuality(kLow_SkFilterQuality);
for (size_t i = 0; i < SK_ARRAY_COUNT(fRecs); i++) {
auto verts = SkVertices::MakeCopy(fRecs[i].fMode, fRecs[i].fCount,
fRecs[i].fVerts, fRecs[i].fTexs,
nullptr);
canvas->save();
paint.setShader(nullptr);
canvas->drawVertices(verts, SkBlendMode::kModulate, paint);
canvas->translate(SkIntToScalar(250), 0);
paint.setShader(fShader0);
canvas->drawVertices(verts, SkBlendMode::kModulate, paint);
canvas->translate(SkIntToScalar(250), 0);
paint.setShader(fShader1);
canvas->drawVertices(verts, SkBlendMode::kModulate, paint);
canvas->restore();
canvas->translate(0, SkIntToScalar(250));
}
}
Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey) override {
return new Click();
}
bool onClick(Click* click) override {
// fCurrX = click->fICurr.fX;
// fCurrY = click->fICurr.fY;
return true;
}
private:
struct Rec {
SkVertices::VertexMode fMode;
int fCount;
SkPoint* fVerts;
SkPoint* fTexs;
Rec() : fCount(0), fVerts(nullptr), fTexs(nullptr) {}
~Rec() { delete[] fVerts; delete[] fTexs; }
};
void make_tris(Rec* rec) {
int n = 10;
SkRandom rand;
rec->fMode = SkVertices::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 = SkVertices::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 r = SK_ScalarPI * 2 * i / n,
sin = SkScalarSin(r),
cos = SkScalarCos(r);
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 = SkVertices::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 r = SK_ScalarPI * 2 * i / n,
sin = SkScalarSin(r),
cos = SkScalarCos(r);
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 Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new VerticesView(); )