void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkPaint paint;
for (int i = 0; i < 4; i++) {
SkImage* image = (i & 0x01) ? fCheckerboard.get() : fBitmap.get();
SkIRect cropRect = SkIRect::MakeXYWH(i * 12,
i * 8,
image->width() - i * 8,
image->height() - i * 12);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
SkAutoTUnref<SkImageFilter> tileInput(SkImageSource::Create(image));
SkScalar dx = SkIntToScalar(i*5);
SkScalar dy = SkIntToScalar(i*10);
SkAutoTUnref<SkImageFilter> filter(SkOffsetImageFilter::Create(dx, dy, tileInput,
&rect));
paint.setImageFilter(filter);
DrawClippedImage(canvas, image, paint, 1, cropRect);
canvas->translate(SkIntToScalar(image->width() + MARGIN), 0);
}
SkIRect cropRect = SkIRect::MakeXYWH(0, 0, 100, 100);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
SkAutoTUnref<SkImageFilter> filter(SkOffsetImageFilter::Create(-5, -10, nullptr, &rect));
paint.setImageFilter(filter);
DrawClippedImage(canvas, fBitmap.get(), paint, 2, cropRect);
}
static bool SK_WARN_UNUSED_RESULT flatten(const SkImage& image, Json::Value* target,
bool sendBinaries) {
if (sendBinaries) {
SkData* encoded = image.encode(SkImageEncoder::kPNG_Type, 100);
if (encoded == nullptr) {
// PNG encode doesn't necessarily support all color formats, convert to a different
// format
size_t rowBytes = 4 * image.width();
void* buffer = sk_malloc_throw(rowBytes * image.height());
SkImageInfo dstInfo = SkImageInfo::Make(image.width(), image.height(),
kN32_SkColorType, kPremul_SkAlphaType);
if (!image.readPixels(dstInfo, buffer, rowBytes, 0, 0)) {
SkDebugf("readPixels failed\n");
return false;
}
SkImage* converted = SkImage::NewRasterCopy(dstInfo, buffer, rowBytes);
encoded = converted->encode(SkImageEncoder::kPNG_Type, 100);
if (encoded == nullptr) {
SkDebugf("image encode failed\n");
return false;
}
free(converted);
free(buffer);
}
Json::Value bytes;
encode_data(encoded->data(), encoded->size(), &bytes);
(*target)[SKJSONCANVAS_ATTRIBUTE_BYTES] = bytes;
encoded->unref();
}
else {
SkString description = SkStringPrintf("%dx%d pixel image", image.width(), image.height());
(*target)[SKJSONCANVAS_ATTRIBUTE_DESCRIPTION] = Json::Value(description.c_str());
}
return true;
}
void SkSurface_Base::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) {
SkImage* image = this->newImageSnapshot(kYes_Budgeted);
if (image) {
canvas->drawImage(image, x, y, paint);
image->unref();
}
}
static void drawJpeg(SkCanvas* canvas, const SkISize& size) {
SkAutoDataUnref data(fileToData("/Users/mike/Downloads/skia.google.jpeg"));
SkImage* image = SkImage::NewEncodedData(data);
if (image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->scale(size.width() * 1.0f / image->width(),
size.height() * 1.0f / image->height());
image->draw(canvas,0, 0, NULL);
image->unref();
}
}
DEF_TEST(ImageDataRef, reporter) {
SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1);
size_t rowBytes = info.minRowBytes();
size_t size = info.getSafeSize(rowBytes);
SkData* data = SkData::NewUninitialized(size);
REPORTER_ASSERT(reporter, data->unique());
SkImage* image = SkImage::NewRasterData(info, data, rowBytes);
REPORTER_ASSERT(reporter, !data->unique());
image->unref();
REPORTER_ASSERT(reporter, data->unique());
data->unref();
}
static void drawJpeg(SkCanvas* canvas, const SkISize& size) {
// TODO: Make this draw a file that is checked in, so it can
// be exercised on machines other than mike's. Will require a
// rebaseline.
SkAutoDataUnref data(fileToData("/Users/mike/Downloads/skia.google.jpeg"));
SkImage* image = SkImage::NewEncodedData(data);
if (image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->scale(size.width() * 1.0f / image->width(),
size.height() * 1.0f / image->height());
image->draw(canvas,0, 0, NULL);
image->unref();
}
}
static void test_surface(SkCanvas* canvas, SkSurface* surf, bool usePaint) {
drawContents(surf, SK_ColorRED);
SkImage* imgR = surf->newImageSnapshot();
if (true) {
SkImage* imgR2 = surf->newImageSnapshot();
SkASSERT(imgR == imgR2);
imgR2->unref();
}
drawContents(surf, SK_ColorGREEN);
SkImage* imgG = surf->newImageSnapshot();
// since we've drawn after we snapped imgR, imgG will be a different obj
SkASSERT(imgR != imgG);
drawContents(surf, SK_ColorBLUE);
SkPaint paint;
// paint.setFilterBitmap(true);
// paint.setAlpha(0x80);
canvas->drawImage(imgR, 0, 0, usePaint ? &paint : NULL);
canvas->drawImage(imgG, 0, 80, usePaint ? &paint : NULL);
surf->draw(canvas, 0, 160, usePaint ? &paint : NULL);
SkRect src1, src2, src3;
src1.iset(0, 0, surf->width(), surf->height());
src2.iset(-surf->width() / 2, -surf->height() / 2,
surf->width(), surf->height());
src3.iset(0, 0, surf->width() / 2, surf->height() / 2);
SkRect dst1, dst2, dst3, dst4;
dst1.set(0, 240, 65, 305);
dst2.set(0, 320, 65, 385);
dst3.set(0, 400, 65, 465);
dst4.set(0, 480, 65, 545);
canvas->drawImageRect(imgR, &src1, dst1, usePaint ? &paint : NULL);
canvas->drawImageRect(imgG, &src2, dst2, usePaint ? &paint : NULL);
canvas->drawImageRect(imgR, &src3, dst3, usePaint ? &paint : NULL);
canvas->drawImageRect(imgG, NULL, dst4, usePaint ? &paint : NULL);
imgG->unref();
imgR->unref();
}
static void drawJpeg(SkCanvas* canvas, const SkISize& size) {
// TODO: Make this draw a file that is checked in, so it can
// be exercised on machines other than mike's. Will require a
// rebaseline.
SkAutoDataUnref data(SkData::NewFromFileName("/Users/mike/Downloads/skia.google.jpeg"));
if (NULL == data.get()) {
return;
}
SkImage* image = SkImage::NewFromGenerator(
SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()));
if (image) {
SkAutoCanvasRestore acr(canvas, true);
canvas->scale(size.width() * 1.0f / image->width(),
size.height() * 1.0f / image->height());
canvas->drawImage(image, 0, 0, NULL);
image->unref();
}
}
static void test_surface(SkCanvas* canvas, SkSurface* surf) {
drawContents(surf, SK_ColorRED);
SkImage* imgR = surf->newImageSnapshot();
if (true) {
SkImage* imgR2 = surf->newImageSnapshot();
SkASSERT(imgR == imgR2);
imgR2->unref();
}
drawContents(surf, SK_ColorGREEN);
SkImage* imgG = surf->newImageSnapshot();
// since we've drawn after we snapped imgR, imgG will be a different obj
SkASSERT(imgR != imgG);
drawContents(surf, SK_ColorBLUE);
SkPaint paint;
// paint.setFilterBitmap(true);
// paint.setAlpha(0x80);
imgR->draw(canvas, 0, 0, &paint);
imgG->draw(canvas, 0, 80, &paint);
surf->draw(canvas, 0, 160, &paint);
imgG->unref();
imgR->unref();
}
void HelloWorldWindow::draw(SkCanvas* canvas) {
drawContents(canvas);
// in case we have queued drawing calls
fContext->flush();
// Invalidate the window to force a redraw. Poor man's animation mechanism.
this->inval(NULL);
if (kRaster_DeviceType == fType) {
// need to send the raster bits to the (gpu) window
SkImage* snap = fSurface->newImageSnapshot();
size_t rowBytes;
SkImageInfo info;
const void* pixels = snap->peekPixels(&info, &rowBytes);
fRenderTarget->writePixels(0, 0, snap->width(), snap->height(),
SkImageInfo2GrPixelConfig(info.colorType(),
info.alphaType(),
info.profileType()),
pixels,
rowBytes,
GrContext::kFlushWrites_PixelOp);
SkSafeUnref(snap);
}
INHERITED::present();
}
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
}