4d5c26de0a
Review URL: https://codereview.appspot.com/7062054 git-svn-id: http://skia.googlecode.com/svn/trunk@7082 2bbb7eff-a529-9590-31e7-b0007b416f81
281 lines
7.5 KiB
C++
281 lines
7.5 KiB
C++
|
|
/*
|
|
* 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 "SkView.h"
|
|
#include "SkCanvas.h"
|
|
#include "Sk64.h"
|
|
#include "SkCornerPathEffect.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkGraphics.h"
|
|
#include "SkImageDecoder.h"
|
|
#include "SkKernel33MaskFilter.h"
|
|
#include "SkPath.h"
|
|
#include "SkRandom.h"
|
|
#include "SkRegion.h"
|
|
#include "SkShader.h"
|
|
#include "SkUtils.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkColorFilter.h"
|
|
#include "SkTime.h"
|
|
#include "SkTypeface.h"
|
|
#include "SkXfermode.h"
|
|
|
|
#include "SkStream.h"
|
|
#include "SkXMLParser.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkImageDecoder.h"
|
|
|
|
static SkRandom gRand;
|
|
|
|
static void test_chromium_9005() {
|
|
SkBitmap bm;
|
|
bm.setConfig(SkBitmap::kARGB_8888_Config, 800, 600);
|
|
bm.allocPixels();
|
|
|
|
SkCanvas canvas(bm);
|
|
|
|
SkPoint pt0 = { SkFloatToScalar(799.33374f), SkFloatToScalar(1.2360189f) };
|
|
SkPoint pt1 = { SkFloatToScalar(808.49969f), SkFloatToScalar(-7.4338055f) };
|
|
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
canvas.drawLine(pt0.fX, pt0.fY, pt1.fX, pt1.fY, paint);
|
|
}
|
|
|
|
static void generate_pts(SkPoint pts[], int count, int w, int h) {
|
|
for (int i = 0; i < count; i++) {
|
|
pts[i].set(gRand.nextUScalar1() * 3 * w - SkIntToScalar(w),
|
|
gRand.nextUScalar1() * 3 * h - SkIntToScalar(h));
|
|
}
|
|
}
|
|
|
|
static bool check_zeros(const SkPMColor pixels[], int count, int skip) {
|
|
for (int i = 0; i < count; i++) {
|
|
if (*pixels) {
|
|
return false;
|
|
}
|
|
pixels += skip;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool check_bitmap_margin(const SkBitmap& bm, int margin) {
|
|
size_t rb = bm.rowBytes();
|
|
for (int i = 0; i < margin; i++) {
|
|
if (!check_zeros(bm.getAddr32(0, i), bm.width(), 1)) {
|
|
return false;
|
|
}
|
|
int bottom = bm.height() - i - 1;
|
|
if (!check_zeros(bm.getAddr32(0, bottom), bm.width(), 1)) {
|
|
return false;
|
|
}
|
|
// left column
|
|
if (!check_zeros(bm.getAddr32(i, 0), bm.height(), rb >> 2)) {
|
|
return false;
|
|
}
|
|
int right = bm.width() - margin + i;
|
|
if (!check_zeros(bm.getAddr32(right, 0), bm.height(), rb >> 2)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#define WIDTH 620
|
|
#define HEIGHT 460
|
|
#define MARGIN 10
|
|
|
|
static void line_proc(SkCanvas* canvas, const SkPaint& paint,
|
|
const SkBitmap& bm) {
|
|
const int N = 2;
|
|
SkPoint pts[N];
|
|
for (int i = 0; i < 400; i++) {
|
|
generate_pts(pts, N, WIDTH, HEIGHT);
|
|
|
|
canvas->drawLine(pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY, paint);
|
|
if (!check_bitmap_margin(bm, MARGIN)) {
|
|
SkDebugf("---- hairline failure (%g %g) (%g %g)\n",
|
|
pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void poly_proc(SkCanvas* canvas, const SkPaint& paint,
|
|
const SkBitmap& bm) {
|
|
const int N = 8;
|
|
SkPoint pts[N];
|
|
for (int i = 0; i < 50; i++) {
|
|
generate_pts(pts, N, WIDTH, HEIGHT);
|
|
|
|
SkPath path;
|
|
path.moveTo(pts[0]);
|
|
for (int j = 1; j < N; j++) {
|
|
path.lineTo(pts[j]);
|
|
}
|
|
canvas->drawPath(path, paint);
|
|
}
|
|
}
|
|
|
|
static SkPoint ave(const SkPoint& a, const SkPoint& b) {
|
|
SkPoint c = a + b;
|
|
c.fX = SkScalarHalf(c.fX);
|
|
c.fY = SkScalarHalf(c.fY);
|
|
return c;
|
|
}
|
|
|
|
static void quad_proc(SkCanvas* canvas, const SkPaint& paint,
|
|
const SkBitmap& bm) {
|
|
const int N = 30;
|
|
SkPoint pts[N];
|
|
for (int i = 0; i < 10; i++) {
|
|
generate_pts(pts, N, WIDTH, HEIGHT);
|
|
|
|
SkPath path;
|
|
path.moveTo(pts[0]);
|
|
for (int j = 1; j < N - 2; j++) {
|
|
path.quadTo(pts[j], ave(pts[j], pts[j+1]));
|
|
}
|
|
path.quadTo(pts[N - 2], pts[N - 1]);
|
|
|
|
canvas->drawPath(path, paint);
|
|
}
|
|
}
|
|
|
|
static void add_cubic(SkPath* path, const SkPoint& mid, const SkPoint& end) {
|
|
SkPoint start;
|
|
path->getLastPt(&start);
|
|
path->cubicTo(ave(start, mid), ave(mid, end), end);
|
|
}
|
|
|
|
static void cube_proc(SkCanvas* canvas, const SkPaint& paint,
|
|
const SkBitmap& bm) {
|
|
const int N = 30;
|
|
SkPoint pts[N];
|
|
for (int i = 0; i < 10; i++) {
|
|
generate_pts(pts, N, WIDTH, HEIGHT);
|
|
|
|
SkPath path;
|
|
path.moveTo(pts[0]);
|
|
for (int j = 1; j < N - 2; j++) {
|
|
add_cubic(&path, pts[j], ave(pts[j], pts[j+1]));
|
|
}
|
|
add_cubic(&path, pts[N - 2], pts[N - 1]);
|
|
|
|
canvas->drawPath(path, paint);
|
|
}
|
|
}
|
|
|
|
typedef void (*HairProc)(SkCanvas*, const SkPaint&, const SkBitmap&);
|
|
|
|
static const struct {
|
|
const char* fName;
|
|
HairProc fProc;
|
|
} gProcs[] = {
|
|
{ "line", line_proc },
|
|
{ "poly", poly_proc },
|
|
{ "quad", quad_proc },
|
|
{ "cube", cube_proc },
|
|
};
|
|
|
|
static int cycle_hairproc_index(int index) {
|
|
return (index + 1) % SK_ARRAY_COUNT(gProcs);
|
|
}
|
|
|
|
class HairlineView : public SampleView {
|
|
SkMSec fNow;
|
|
int fProcIndex;
|
|
bool fDoAA;
|
|
public:
|
|
HairlineView() {
|
|
fCounter = 0;
|
|
fProcIndex = 0;
|
|
fDoAA = true;
|
|
fNow = 0;
|
|
}
|
|
|
|
protected:
|
|
// overrides from SkEventSink
|
|
virtual bool onQuery(SkEvent* evt) {
|
|
if (SampleCode::TitleQ(*evt)) {
|
|
SkString str;
|
|
str.printf("Hair-%s", gProcs[fProcIndex].fName);
|
|
SampleCode::TitleR(evt, str.c_str());
|
|
return true;
|
|
}
|
|
return this->INHERITED::onQuery(evt);
|
|
}
|
|
|
|
void show_bitmaps(SkCanvas* canvas, const SkBitmap& b0, const SkBitmap& b1,
|
|
const SkIRect& inset) {
|
|
canvas->drawBitmap(b0, 0, 0, NULL);
|
|
canvas->drawBitmap(b1, SkIntToScalar(b0.width()), 0, NULL);
|
|
}
|
|
|
|
int fCounter;
|
|
|
|
virtual void onDrawContent(SkCanvas* canvas) {
|
|
gRand.setSeed(fNow);
|
|
|
|
if (false) { // avoid bit rot, suppress warning
|
|
test_chromium_9005();
|
|
}
|
|
|
|
SkBitmap bm, bm2;
|
|
bm.setConfig(SkBitmap::kARGB_8888_Config,
|
|
WIDTH + MARGIN*2,
|
|
HEIGHT + MARGIN*2);
|
|
bm.allocPixels();
|
|
// this will erase our margin, which we want to always stay 0
|
|
bm.eraseColor(SK_ColorTRANSPARENT);
|
|
|
|
bm2.setConfig(SkBitmap::kARGB_8888_Config, WIDTH, HEIGHT,
|
|
bm.rowBytes());
|
|
bm2.setPixels(bm.getAddr32(MARGIN, MARGIN));
|
|
|
|
SkCanvas c2(bm2);
|
|
SkPaint paint;
|
|
paint.setAntiAlias(fDoAA);
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
|
|
|
bm2.eraseColor(SK_ColorTRANSPARENT);
|
|
gProcs[fProcIndex].fProc(&c2, paint, bm);
|
|
canvas->drawBitmap(bm2, SkIntToScalar(10), SkIntToScalar(10), NULL);
|
|
|
|
SkMSec now = SampleCode::GetAnimTime();
|
|
if (fNow != now) {
|
|
fNow = now;
|
|
fCounter += 1;
|
|
fDoAA = !fDoAA;
|
|
if (fCounter > 50) {
|
|
fProcIndex = cycle_hairproc_index(fProcIndex);
|
|
// todo: signal that we want to rebuild our TITLE
|
|
fCounter = 0;
|
|
}
|
|
this->inval(NULL);
|
|
}
|
|
}
|
|
|
|
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y,
|
|
unsigned modi) {
|
|
fDoAA = !fDoAA;
|
|
this->inval(NULL);
|
|
return this->INHERITED::onFindClickHandler(x, y, modi);
|
|
}
|
|
|
|
|
|
private:
|
|
typedef SampleView INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static SkView* MyFactory() { return new HairlineView; }
|
|
static SkViewRegister reg(MyFactory);
|
|
|