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