| #include "SampleCode.h" |
| #include "SkView.h" |
| #include "SkCanvas.h" |
| #include "Sk64.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" |
| |
| static const int gKernel[3][3] = { |
| // { -1, -2, -1 }, { -2, 12, -2 }, { -1, -2, -1 } |
| { 1, 2, 1 }, { 2, 64-12, 2 }, { 1, 2, 1 } |
| }; |
| static const int gShift = 6; |
| |
| class ReduceNoise : public SkKernel33ProcMaskFilter { |
| public: |
| ReduceNoise(int percent256) : SkKernel33ProcMaskFilter(percent256) {} |
| virtual uint8_t computeValue(uint8_t* const* srcRows) |
| { |
| int c = srcRows[1][1]; |
| int min = 255, max = 0; |
| for (int i = 0; i < 3; i++) |
| for (int j = 0; j < 3; j++) |
| if (i != 1 || j != 1) |
| { |
| int v = srcRows[i][j]; |
| if (max < v) |
| max = v; |
| if (min > v) |
| min = v; |
| } |
| if (c > max) c = max; |
| // if (c < min) c = min; |
| return c; |
| } |
| virtual Factory getFactory() { return Create; } |
| private: |
| ReduceNoise(SkFlattenableReadBuffer& rb) : SkKernel33ProcMaskFilter(rb) {} |
| static SkFlattenable* Create(SkFlattenableReadBuffer& rb) { |
| return new ReduceNoise(rb); |
| } |
| }; |
| |
| class Darken : public SkKernel33ProcMaskFilter { |
| public: |
| Darken(int percent256) : SkKernel33ProcMaskFilter(percent256) {} |
| virtual uint8_t computeValue(uint8_t* const* srcRows) |
| { |
| int c = srcRows[1][1]; |
| float f = c / 255.f; |
| |
| if (c >= 0) { |
| f = sqrtf(f); |
| } else { |
| f *= f; |
| } |
| SkASSERT(f >= 0 && f <= 1); |
| return (int)(f * 255); |
| } |
| virtual Factory getFactory() { return Create; } |
| private: |
| Darken(SkFlattenableReadBuffer& rb) : SkKernel33ProcMaskFilter(rb) {} |
| static SkFlattenable* Create(SkFlattenableReadBuffer& rb) { |
| return new Darken(rb); |
| } |
| }; |
| |
| static SkMaskFilter* makemf() { return new Darken(0x30); } |
| |
| static void test_breakText() { |
| SkPaint paint; |
| const char* text = "sdfkljAKLDFJKEWkldfjlk#$%&sdfs.dsj"; |
| size_t length = strlen(text); |
| SkScalar width = paint.measureText(text, length); |
| |
| SkScalar mm = 0; |
| SkScalar nn = 0; |
| for (SkScalar w = 0; w <= width; w += SK_Scalar1) { |
| SkScalar m; |
| size_t n = paint.breakText(text, length, w, &m, |
| SkPaint::kBackward_TextBufferDirection); |
| |
| SkASSERT(n <= length); |
| SkASSERT(m <= width); |
| |
| if (n == 0) { |
| SkASSERT(m == 0); |
| } else { |
| // now assert that we're monotonic |
| if (n == nn) { |
| SkASSERT(m == mm); |
| } else { |
| SkASSERT(n > nn); |
| SkASSERT(m > mm); |
| } |
| } |
| nn = SkIntToScalar(n); |
| mm = m; |
| } |
| |
| SkDEBUGCODE(size_t length2 =) paint.breakText(text, length, width, &mm); |
| SkASSERT(length2 == length); |
| SkASSERT(mm == width); |
| } |
| |
| static SkRandom gRand; |
| |
| class SkPowerMode : public SkXfermode { |
| public: |
| SkPowerMode(SkScalar exponent) { this->init(exponent); } |
| |
| virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count, |
| const SkAlpha aa[]); |
| |
| typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&); |
| |
| // overrides for SkFlattenable |
| virtual Factory getFactory() { return Create; } |
| virtual void flatten(SkFlattenableWriteBuffer& b) { |
| // this->INHERITED::flatten(b); How can we know if this is legal???? |
| b.write32(SkScalarToFixed(fExp)); |
| } |
| |
| private: |
| SkScalar fExp; // user's value |
| uint8_t fTable[256]; // cache |
| |
| void init(SkScalar exponent); |
| SkPowerMode(SkFlattenableReadBuffer& b) : SkXfermode(b) { |
| // read the exponent |
| this->init(SkFixedToScalar(b.readS32())); |
| } |
| static SkFlattenable* Create(SkFlattenableReadBuffer& b) { |
| return SkNEW_ARGS(SkPowerMode, (b)); |
| } |
| |
| typedef SkXfermode INHERITED; |
| }; |
| |
| void SkPowerMode::init(SkScalar e) { |
| fExp = e; |
| float ee = SkScalarToFloat(e); |
| |
| printf("------ %g\n", ee); |
| for (int i = 0; i < 256; i++) { |
| float x = i / 255.f; |
| // printf(" %d %g", i, x); |
| x = powf(x, ee); |
| // printf(" %g", x); |
| int xx = SkScalarRound(SkFloatToScalar(x * 255)); |
| // printf(" %d\n", xx); |
| fTable[i] = SkToU8(xx); |
| } |
| } |
| |
| void SkPowerMode::xfer16(uint16_t dst[], const SkPMColor src[], int count, |
| const SkAlpha aa[]) { |
| for (int i = 0; i < count; i++) { |
| SkPMColor c = src[i]; |
| int r = SkGetPackedR32(c); |
| int g = SkGetPackedG32(c); |
| int b = SkGetPackedB32(c); |
| r = fTable[r]; |
| g = fTable[g]; |
| b = fTable[b]; |
| dst[i] = SkPack888ToRGB16(r, g, b); |
| } |
| } |
| |
| static const struct { |
| const char* fName; |
| uint32_t fFlags; |
| bool fFlushCache; |
| } gHints[] = { |
| { "Linear", SkPaint::kLinearText_Flag, false }, |
| { "Normal", 0, true }, |
| { "Subpixel", SkPaint::kSubpixelText_Flag, true } |
| }; |
| |
| static int count_char_points(const SkPaint& paint, char c) { |
| SkPath path; |
| |
| paint.getTextPath(&c, 1, 0, 0, &path); |
| return path.getPoints(NULL, 0); |
| } |
| |
| static int gOld, gNew, gCount; |
| |
| static void dump(int c, int oldc, int newc) { |
| if (oldc != newc) { |
| gOld += oldc; |
| gNew += newc; |
| gCount += 1; |
| printf("char %c: old = %3d, new = %3d, reduction %g%%\n", c, oldc, newc, 100. * (oldc - newc) / oldc); |
| } |
| } |
| |
| static void tab(int n) { |
| // printf("[%d] ", n); return; |
| SkASSERT(n >= 0); |
| for (int i = 0; i < n; i++) |
| printf(" "); |
| } |
| |
| static void draw_rgn(const SkRegion& rgn, SkCanvas* canvas, const SkPaint& paint) { |
| SkRect r; |
| SkRegion::Iterator iter(rgn); |
| |
| for (; !iter.done(); iter.next()) { |
| r.set(iter.rect()); |
| canvas->drawRect(r, paint); |
| } |
| } |
| |
| static void test_break(SkCanvas* canvas, const char text[], size_t length, |
| SkScalar x, SkScalar y, const SkPaint& paint, |
| SkScalar clickX) { |
| SkPaint linePaint; |
| |
| linePaint.setAntiAlias(true); |
| |
| SkScalar measured; |
| |
| if (paint.breakText(text, length, clickX - x, &measured, |
| SkPaint::kForward_TextBufferDirection)) { |
| linePaint.setColor(SK_ColorRED); |
| canvas->drawLine(x, y, x + measured, y, linePaint); |
| } |
| |
| x += paint.measureText(text, length); |
| if (paint.breakText(text, length, x - clickX, &measured, |
| SkPaint::kBackward_TextBufferDirection)) { |
| linePaint.setColor(SK_ColorBLUE); |
| canvas->drawLine(x - measured, y, x, y, linePaint); |
| } |
| } |
| |
| static void DrawTheText(SkCanvas* canvas, const char text[], size_t length, |
| SkScalar x, SkScalar y, const SkPaint& paint, |
| SkScalar clickX, SkMaskFilter* mf) { |
| SkPaint p(paint); |
| |
| #if 0 |
| canvas->drawText(text, length, x, y, paint); |
| #else |
| { |
| SkPoint pts[1000]; |
| SkScalar xpos = x; |
| SkASSERT(length <= SK_ARRAY_COUNT(pts)); |
| for (size_t i = 0; i < length; i++) { |
| pts[i].set(xpos, y), xpos += paint.getTextSize(); |
| } |
| canvas->drawPosText(text, length, pts, paint); |
| } |
| #endif |
| |
| p.setSubpixelText(true); |
| x += SkIntToScalar(180); |
| canvas->drawText(text, length, x, y, p); |
| |
| #ifdef SK_DEBUG |
| if (true) { |
| // p.setMaskFilter(mf); |
| p.setSubpixelText(false); |
| p.setLinearText(true); |
| x += SkIntToScalar(180); |
| canvas->drawText(text, length, x, y, p); |
| } |
| #endif |
| } |
| |
| class TextSpeedView : public SampleView { |
| public: |
| TextSpeedView() { |
| fMF = makemf(); |
| |
| fHints = 0; |
| fClickX = 0; |
| |
| test_breakText(); |
| } |
| |
| virtual ~TextSpeedView() { |
| SkSafeUnref(fMF); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "Text"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| static void make_textstrip(SkBitmap* bm) { |
| bm->setConfig(SkBitmap::kRGB_565_Config, 200, 18); |
| bm->allocPixels(); |
| bm->eraseColor(SK_ColorWHITE); |
| |
| SkCanvas canvas(*bm); |
| SkPaint paint; |
| const char* s = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit"; |
| |
| paint.setFlags(paint.getFlags() | SkPaint::kAntiAlias_Flag |
| | SkPaint::kDevKernText_Flag); |
| paint.setTextSize(SkIntToScalar(14)); |
| canvas.drawText(s, strlen(s), SkIntToScalar(8), SkIntToScalar(14), paint); |
| } |
| |
| static void fill_pts(SkPoint pts[], size_t n, SkRandom* rand) { |
| for (size_t i = 0; i < n; i++) |
| pts[i].set(rand->nextUScalar1() * 640, rand->nextUScalar1() * 480); |
| } |
| |
| virtual void onDrawContent(SkCanvas* canvas) { |
| SkAutoCanvasRestore restore(canvas, false); |
| { |
| SkRect r; |
| r.set(0, 0, SkIntToScalar(1000), SkIntToScalar(20)); |
| // canvas->saveLayer(&r, NULL, SkCanvas::kHasAlphaLayer_SaveFlag); |
| } |
| |
| SkPaint paint; |
| // const uint16_t glyphs[] = { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19 }; |
| int index = fHints % SK_ARRAY_COUNT(gHints); |
| index = 1; |
| // const char* style = gHints[index].fName; |
| |
| // canvas->translate(0, SkIntToScalar(50)); |
| |
| // canvas->drawText(style, strlen(style), SkIntToScalar(20), SkIntToScalar(20), paint); |
| |
| SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromFile("/skimages/samplefont.ttf"))); |
| paint.setAntiAlias(true); |
| paint.setFlags(paint.getFlags() | gHints[index].fFlags); |
| |
| SkRect clip; |
| clip.set(SkIntToScalar(25), SkIntToScalar(34), SkIntToScalar(88), SkIntToScalar(155)); |
| |
| const char* text = "Hamburgefons"; |
| size_t length = strlen(text); |
| |
| SkScalar y = SkIntToScalar(0); |
| for (int i = 9; i <= 24; i++) { |
| paint.setTextSize(SkIntToScalar(i) /*+ (gRand.nextU() & 0xFFFF)*/); |
| for (SkScalar dx = 0; dx <= SkIntToScalar(3)/4; |
| dx += SkIntToScalar(1) /* /4 */) { |
| y += paint.getFontSpacing(); |
| DrawTheText(canvas, text, length, SkIntToScalar(20) + dx, y, |
| paint, fClickX, fMF); |
| } |
| } |
| if (gHints[index].fFlushCache) { |
| // SkGraphics::SetFontCacheUsed(0); |
| } |
| } |
| |
| virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { |
| fClickX = x; |
| this->inval(NULL); |
| return this->INHERITED::onFindClickHandler(x, y); |
| } |
| |
| virtual bool onClick(Click* click) { |
| return this->INHERITED::onClick(click); |
| } |
| |
| private: |
| int fHints; |
| SkScalar fClickX; |
| SkMaskFilter* fMF; |
| |
| typedef SampleView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new TextSpeedView; } |
| static SkViewRegister reg(MyFactory); |
| |
