static void glyphsToAdvances(HB_Font hbFont, const HB_Glyph* glyphs,
hb_uint32 numGlyphs, HB_Fixed* advances, int flags) {
SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
SkPaint paint;
font->setupPaint(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
SkAutoMalloc storage(numGlyphs * (sizeof(SkScalar) + sizeof(uint16_t)));
SkScalar* scalarWidths = reinterpret_cast<SkScalar*>(storage.get());
uint16_t* glyphs16 = reinterpret_cast<uint16_t*>(scalarWidths + numGlyphs);
// convert HB 32bit glyphs to skia's 16bit
for (hb_uint32 i = 0; i < numGlyphs; ++i) {
glyphs16[i] = SkToU16(glyphs[i]);
}
paint.getTextWidths(glyphs16, numGlyphs * sizeof(uint16_t), scalarWidths);
for (hb_uint32 i = 0; i < numGlyphs; ++i) {
advances[i] = SkScalarToHarfbuzzFixed(scalarWidths[i]);
}
}
static void getGlyphMetrics(HB_Font hbFont, HB_Glyph glyph, HB_GlyphMetrics* metrics)
{
FontPlatformData* font = reinterpret_cast<FontPlatformData*>(hbFont->userData);
SkPaint paint;
font->setupPaint(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
uint16_t glyph16 = glyph;
SkScalar width;
SkRect bounds;
paint.getTextWidths(&glyph16, sizeof(glyph16), &width, &bounds);
metrics->x = SkiaScalarToHarfbuzzFixed(bounds.fLeft);
metrics->y = SkiaScalarToHarfbuzzFixed(bounds.fTop);
metrics->width = SkiaScalarToHarfbuzzFixed(bounds.width());
metrics->height = SkiaScalarToHarfbuzzFixed(bounds.height());
metrics->xOffset = SkiaScalarToHarfbuzzFixed(width);
// We can't actually get the |y| correct because Skia doesn't export
// the vertical advance. However, nor we do ever render vertical text at
// the moment so it's unimportant.
metrics->yOffset = 0;
}
int Font::offsetForPositionForComplexText(const TextRun& run, int x,
bool includePartialGlyphs) const
{
SkPaint paint;
int count = run.length();
SkAutoSTMalloc<64, SkScalar> storage(count);
SkScalar* widths = storage.get();
primaryFont()->platformData().setupPaint(&paint);
count = paint.getTextWidths(run.characters(), count << 1, widths);
if (count > 0)
{
SkScalar pos = 0;
for (int i = 0; i < count; i++)
{
if (x < SkScalarRound(pos + SkScalarHalf(widths[i])))
return i;
pos += widths[i];
}
}
return count;
}
TextBench(void* param, const char text[], int ps,
SkColor color, FontQuality fq, bool doPos = false) : INHERITED(param) {
fFQ = fq;
fDoPos = doPos;
fText.set(text);
fPaint.setAntiAlias(kBW != fq);
fPaint.setLCDRenderText(kLCD == fq);
fPaint.setTextSize(SkIntToScalar(ps));
fPaint.setColor(color);
if (doPos) {
size_t len = strlen(text);
SkScalar* adv = new SkScalar[len];
fPaint.getTextWidths(text, len, adv);
fPos = new SkPoint[len];
SkScalar x = 0;
for (size_t i = 0; i < len; ++i) {
fPos[i].set(x, SkIntToScalar(50));
x += adv[i];
}
delete[] adv;
}
}
virtual void onDraw(SkCanvas* canvas) {
// explicitly add spaces, to test a prev. bug
const char* text = "Ham bur ge fons";
int len = SkToInt(strlen(text));
SkPath path;
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setTextSize(SkIntToScalar(48));
canvas->translate(SkIntToScalar(10), SkIntToScalar(64));
canvas->drawText(text, len, 0, 0, paint);
paint.getTextPath(text, len, 0, 0, &path);
strokePath(canvas, path);
path.reset();
SkAutoTArray<SkPoint> pos(len);
SkAutoTArray<SkScalar> widths(len);
paint.getTextWidths(text, len, &widths[0]);
SkRandom rand;
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(100);
for (int i = 0; i < len; ++i) {
pos[i].set(x, y + rand.nextSScalar1() * 24);
x += widths[i];
}
canvas->translate(0, SkIntToScalar(64));
canvas->drawPosText(text, len, &pos[0], paint);
paint.getPosTextPath(text, len, &pos[0], &path);
strokePath(canvas, path);
}
virtual void onDraw(SkCanvas* inputCanvas) override {
#ifdef SK_BUILD_FOR_ANDROID
SkScalar textSizes[] = { 9.0f, 9.0f*2.0f, 9.0f*5.0f, 9.0f*2.0f*5.0f };
#else
SkScalar textSizes[] = { 11.0f, 11.0f*2.0f, 11.0f*5.0f, 11.0f*2.0f*5.0f };
#endif
SkScalar scales[] = { 2.0f*5.0f, 5.0f, 2.0f, 1.0f };
// set up offscreen rendering with distance field text
#if SK_SUPPORT_GPU
GrContext* ctx = inputCanvas->getGrContext();
SkImageInfo info = SkImageInfo::MakeN32Premul(onISize());
SkSurfaceProps props(SkSurfaceProps::kUseDistanceFieldFonts_Flag,
SkSurfaceProps::kLegacyFontHost_InitType);
SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgeted,
info, 0, &props));
SkCanvas* canvas = surface.get() ? surface->getCanvas() : inputCanvas;
// init our new canvas with the old canvas's matrix
canvas->setMatrix(inputCanvas->getTotalMatrix());
#else
SkCanvas* canvas = inputCanvas;
#endif
// apply global scale to test glyph positioning
canvas->scale(1.05f, 1.05f);
canvas->clear(0xffffffff);
SkPaint paint;
paint.setAntiAlias(true);
paint.setSubpixelText(true);
sk_tool_utils::set_portable_typeface(&paint, "Times New Roman", SkTypeface::kNormal);
const char* text = "Hamburgefons";
const size_t textLen = strlen(text);
// check scaling up
SkScalar x = SkIntToScalar(0);
SkScalar y = SkIntToScalar(78);
for (size_t i = 0; i < SK_ARRAY_COUNT(textSizes); ++i) {
SkAutoCanvasRestore acr(canvas, true);
canvas->translate(x, y);
canvas->scale(scales[i], scales[i]);
paint.setTextSize(textSizes[i]);
canvas->drawText(text, textLen, 0, 0, paint);
y += paint.getFontMetrics(NULL)*scales[i];
}
// check rotation
for (size_t i = 0; i < 5; ++i) {
SkScalar rotX = SkIntToScalar(10);
SkScalar rotY = y;
SkAutoCanvasRestore acr(canvas, true);
canvas->translate(SkIntToScalar(10 + i * 200), -80);
rotate_about(canvas, SkIntToScalar(i * 5), rotX, rotY);
for (int ps = 6; ps <= 32; ps += 3) {
paint.setTextSize(SkIntToScalar(ps));
canvas->drawText(text, textLen, rotX, rotY, paint);
rotY += paint.getFontMetrics(NULL);
}
}
// check scaling down
paint.setLCDRenderText(true);
x = SkIntToScalar(680);
y = SkIntToScalar(20);
size_t arraySize = SK_ARRAY_COUNT(textSizes);
for (size_t i = 0; i < arraySize; ++i) {
SkAutoCanvasRestore acr(canvas, true);
canvas->translate(x, y);
SkScalar scaleFactor = SkScalarInvert(scales[arraySize - i - 1]);
canvas->scale(scaleFactor, scaleFactor);
paint.setTextSize(textSizes[i]);
canvas->drawText(text, textLen, 0, 0, paint);
y += paint.getFontMetrics(NULL)*scaleFactor;
}
// check pos text
{
SkAutoCanvasRestore acr(canvas, true);
canvas->scale(2.0f, 2.0f);
SkAutoTArray<SkPoint> pos(SkToInt(textLen));
SkAutoTArray<SkScalar> widths(SkToInt(textLen));
paint.setTextSize(textSizes[0]);
paint.getTextWidths(text, textLen, &widths[0]);
SkScalar x = SkIntToScalar(340);
SkScalar y = SkIntToScalar(75);
for (unsigned int i = 0; i < textLen; ++i) {
pos[i].set(x, y);
x += widths[i];
}
canvas->drawPosText(text, textLen, &pos[0], paint);
}
// check gamma-corrected blending
const SkColor fg[] = {
0xFFFFFFFF,
0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
0xFF000000,
};
paint.setColor(0xFFF1F1F1);
SkRect r = SkRect::MakeLTRB(670, 250, 820, 460);
canvas->drawRect(r, paint);
x = SkIntToScalar(680);
y = SkIntToScalar(270);
#ifdef SK_BUILD_FOR_ANDROID
paint.setTextSize(SkIntToScalar(19));
#else
paint.setTextSize(SkIntToScalar(22));
#endif
for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
paint.setColor(fg[i]);
canvas->drawText(text, textLen, x, y, paint);
y += paint.getFontMetrics(NULL);
}
paint.setColor(0xFF1F1F1F);
r = SkRect::MakeLTRB(820, 250, 970, 460);
canvas->drawRect(r, paint);
x = SkIntToScalar(830);
y = SkIntToScalar(270);
#ifdef SK_BUILD_FOR_ANDROID
paint.setTextSize(SkIntToScalar(19));
#else
paint.setTextSize(SkIntToScalar(22));
#endif
for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
paint.setColor(fg[i]);
canvas->drawText(text, textLen, x, y, paint);
y += paint.getFontMetrics(NULL);
}
// check skew
{
paint.setLCDRenderText(false);
SkAutoCanvasRestore acr(canvas, true);
canvas->skew(0.0f, 0.151515f);
paint.setTextSize(SkIntToScalar(32));
canvas->drawText(text, textLen, 745, 70, paint);
}
{
paint.setLCDRenderText(true);
SkAutoCanvasRestore acr(canvas, true);
canvas->skew(0.5f, 0.0f);
paint.setTextSize(SkIntToScalar(32));
canvas->drawText(text, textLen, 580, 230, paint);
}
// check color emoji
paint.setTypeface(fTypeface);
#ifdef SK_BUILD_FOR_ANDROID
paint.setTextSize(SkIntToScalar(19));
#else
paint.setTextSize(SkIntToScalar(22));
#endif
canvas->drawText(text, textLen, 670, 100, paint);
#if SK_SUPPORT_GPU
// render offscreen buffer
if (surface) {
SkAutoCanvasRestore acr(inputCanvas, true);
// since we prepended this matrix already, we blit using identity
inputCanvas->resetMatrix();
SkImage* image = surface->newImageSnapshot();
inputCanvas->drawImage(image, 0, 0, NULL);
image->unref();
}
#endif
}