315 lines
8.6 KiB
C++
315 lines
8.6 KiB
C++
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#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkImageDecoder.h"
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#include "SkPackBits.h"
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#include "SkPath.h"
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#include "SkPathMeasure.h"
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#include "SkRandom.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkTypeface.h"
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#include "SkAvoidXfermode.h"
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#define REPEAT_COUNT 1
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static const char gText[] = "Hamburgefons";
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static bool gDevKern;
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static void rand_text(char text[], SkRandom& rand, size_t count) {
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for (size_t i = 0; i < count; i++) {
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text[i] = rand.nextU() & 0x7F;
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}
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}
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static SkScalar sum_widths(const SkScalar widths[], int count) {
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SkScalar w = 0;
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for (int i = 0; i < count; i++) {
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w += widths[i];
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}
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return w;
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}
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static void test_measure(const SkPaint& paint) {
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char text[256];
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SkScalar widths[256];
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SkRect rects[256];
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SkRect bounds;
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int count = 256;
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SkRandom rand;
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for (int i = 0; i < 100; i++) {
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rand_text(text, rand, 256);
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paint.getTextWidths(text, count, widths, NULL);
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SkScalar tw0 = sum_widths(widths, count);
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paint.getTextWidths(text, count, widths, rects);
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SkScalar tw1 = sum_widths(widths, count);
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SkASSERT(tw0 == tw1);
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SkScalar w0 = paint.measureText(text, count, NULL);
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SkScalar w1 = paint.measureText(text, count, &bounds);
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SkASSERT(w0 == w1);
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SkASSERT(w0 == tw0);
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SkRect r = rects[0];
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SkScalar x = 0;
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for (int j = 1; j < count; j++) {
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x += widths[j-1];
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rects[j].offset(x, 0);
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r.join(rects[j]);
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}
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SkASSERT(r == bounds);
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if (r != bounds) {
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printf("flags=%x i=%d [%g %g %g %g] [%g %g %g %g]\n",
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paint.getFlags(), i,
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SkScalarToFloat(r.fLeft),
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SkScalarToFloat(r.fTop),
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SkScalarToFloat(r.fRight),
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SkScalarToFloat(r.fBottom),
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SkScalarToFloat(bounds.fLeft),
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SkScalarToFloat(bounds.fTop),
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SkScalarToFloat(bounds.fRight),
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SkScalarToFloat(bounds.fBottom));
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}
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}
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}
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static void test_measure() {
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SkPaint paint;
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for (int i = 0; i <= SkPaint::kAllFlags; i++) {
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paint.setFlags(i);
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test_measure(paint);
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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static void test_textBounds(SkCanvas* canvas) {
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// canvas->scale(SK_Scalar1/2, SK_Scalar1/2);
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// canvas->rotate(SkIntToScalar(30));
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gDevKern = !gDevKern;
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SkScalar x = SkIntToScalar(50);
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SkScalar y = SkIntToScalar(150);
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SkScalar w[100];
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SkRect r[100], bounds;
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SkPaint paint;
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paint.setTextSize(SkIntToScalar(64));
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paint.setAntiAlias(true);
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paint.setDevKernText(gDevKern);
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(void)paint.measureText(gText, strlen(gText), &bounds, NULL);
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paint.setColor(SK_ColorGREEN);
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bounds.offset(x, y);
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canvas->drawRect(bounds, paint);
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int count = paint.getTextWidths(gText, strlen(gText), w, r);
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paint.setColor(SK_ColorRED);
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for (int i = 0; i < count; i++) {
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r[i].offset(x, y);
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canvas->drawRect(r[i], paint);
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x += w[i];
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}
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x = SkIntToScalar(50);
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paint.setColor(gDevKern ? SK_ColorDKGRAY : SK_ColorBLACK);
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canvas->drawText(gText, strlen(gText), x, y, paint);
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}
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static void create_src(SkBitmap* bitmap, SkBitmap::Config config) {
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bitmap->setConfig(config, 100, 100);
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bitmap->allocPixels();
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bitmap->eraseColor(0);
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SkCanvas canvas(*bitmap);
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SkPaint paint;
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paint.setAntiAlias(true);
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canvas.drawCircle(SkIntToScalar(50), SkIntToScalar(50),
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SkIntToScalar(50), paint);
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}
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static void blur(SkBitmap* dst, const SkBitmap& src, SkScalar radius) {
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*dst = src;
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}
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static void test_bitmap_blur(SkCanvas* canvas) {
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SkBitmap src, dst;
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create_src(&src, SkBitmap::kARGB_8888_Config);
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blur(&dst, src, SkIntToScalar(4));
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SkPaint paint;
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paint.setColor(SK_ColorRED);
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canvas->drawBitmap(dst, SkIntToScalar(30), SkIntToScalar(60), &paint);
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}
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static SkScalar getpathlen(const SkPath& path) {
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SkPathMeasure meas(path, false);
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return meas.getLength();
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}
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static void test_textpathmatrix(SkCanvas* canvas) {
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SkPaint paint;
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SkPath path;
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SkMatrix matrix;
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path.moveTo(SkIntToScalar(200), SkIntToScalar(300));
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path.quadTo(SkIntToScalar(400), SkIntToScalar(100),
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SkIntToScalar(600), SkIntToScalar(300));
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->drawPath(path, paint);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setTextSize(SkIntToScalar(48));
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paint.setTextAlign(SkPaint::kRight_Align);
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const char* text = "Android";
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size_t len = strlen(text);
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SkScalar pathLen = getpathlen(path);
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canvas->drawTextOnPath(text, len, path, NULL, paint);
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paint.setColor(SK_ColorRED);
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matrix.setScale(-SK_Scalar1, SK_Scalar1);
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matrix.postTranslate(pathLen, 0);
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canvas->drawTextOnPath(text, len, path, &matrix, paint);
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paint.setColor(SK_ColorBLUE);
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matrix.setScale(SK_Scalar1, -SK_Scalar1);
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canvas->drawTextOnPath(text, len, path, &matrix, paint);
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paint.setColor(SK_ColorGREEN);
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matrix.setScale(-SK_Scalar1, -SK_Scalar1);
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matrix.postTranslate(pathLen, 0);
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canvas->drawTextOnPath(text, len, path, &matrix, paint);
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}
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class TextOnPathView : public SkView {
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public:
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SkPath fPath;
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SkScalar fHOffset;
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TextOnPathView() {
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SkRect r;
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r.set(SkIntToScalar(100), SkIntToScalar(100),
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SkIntToScalar(300), SkIntToScalar(300));
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fPath.addOval(r);
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fHOffset = SkIntToScalar(50);
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}
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protected:
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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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SampleCode::TitleR(evt, "Text On Path");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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#if 0
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SkRect r;
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SkPaint p;
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SkRandom rand;
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p.setAntiAlias(true);
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for (int i = 0; i < 100; i++) {
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SkScalar x = rand.nextUScalar1() * 300 + SkIntToScalar(50);
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SkScalar y = rand.nextUScalar1() * 200 + SkIntToScalar(50);
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SkScalar w = rand.nextUScalar1() * 10;
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SkScalar h = rand.nextUScalar1() * 10;
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r.set(x, y, x + w, y + h);
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canvas->drawRect(r, p);
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}
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test_textBounds(canvas);
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// return;
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SkBitmap bm;
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if (SkImageDecoder::DecodeFile("/loading_tile.png",
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&bm, SkBitmap::kRGB_565_Config, true))
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canvas->drawBitmap(bm, 0, 0);
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#endif
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setTextSize(SkIntToScalar(50));
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for (int j = 0; j < REPEAT_COUNT; j++) {
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SkScalar x = fHOffset;
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paint.setColor(SK_ColorBLACK);
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canvas->drawTextOnPathHV(gText, sizeof(gText)-1, fPath,
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x, paint.getTextSize()/2, paint);
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paint.setColor(SK_ColorRED);
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canvas->drawTextOnPathHV(gText, sizeof(gText)-1, fPath,
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x + SkIntToScalar(50), 0, paint);
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paint.setColor(SK_ColorBLUE);
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canvas->drawTextOnPathHV(gText, sizeof(gText)-1, fPath,
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x + SkIntToScalar(100), -paint.getTextSize()/2, paint);
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}
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paint.setColor(SK_ColorGREEN);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas->drawPath(fPath, paint);
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canvas->translate(SkIntToScalar(200), 0);
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test_textpathmatrix(canvas);
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test_bitmap_blur(canvas);
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if (REPEAT_COUNT > 1)
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this->inval(NULL);
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}
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virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
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fHints += 1;
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this->inval(NULL);
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return this->INHERITED::onFindClickHandler(x, y);
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}
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virtual bool onClick(Click* click) {
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return this->INHERITED::onClick(click);
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}
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private:
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int fHints;
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() {
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return new TextOnPathView;
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}
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static SkViewRegister reg(MyFactory);
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