Add serialize + catalog api to SkTextBlob
Bug: skia:6836
Change-Id: I858cf936b015c14f12a41a4912e19bb15de8abaa
Reviewed-on: https://skia-review.googlesource.com/21730
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/tests/TextBlobTest.cpp b/tests/TextBlobTest.cpp
index 3834116..238d734 100644
--- a/tests/TextBlobTest.cpp
+++ b/tests/TextBlobTest.cpp
@@ -383,3 +383,82 @@
REPORTER_ASSERT(reporter, 0 == strncmp(text2, it.text(), it.textSize()));
}
}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+#include "SkCanvas.h"
+#include "SkSurface.h"
+#include "SkTDArray.h"
+
+static void add_run(SkTextBlobBuilder* builder, const char text[], SkScalar x, SkScalar y,
+ sk_sp<SkTypeface> tf) {
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ paint.setSubpixelText(true);
+ paint.setTextSize(16);
+ paint.setTypeface(tf);
+
+ int glyphCount = paint.textToGlyphs(text, strlen(text), nullptr);
+
+ paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
+ SkTextBlobBuilder::RunBuffer buffer = builder->allocRun(paint, glyphCount, x, y);
+
+ paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
+ (void)paint.textToGlyphs(text, strlen(text), buffer.glyphs);
+}
+
+static sk_sp<SkImage> render(const SkTextBlob* blob) {
+ auto surf = SkSurface::MakeRasterN32Premul(SkScalarRoundToInt(blob->bounds().width()),
+ SkScalarRoundToInt(blob->bounds().height()));
+ surf->getCanvas()->clear(SK_ColorWHITE);
+ surf->getCanvas()->drawTextBlob(blob, -blob->bounds().left(), -blob->bounds().top(), SkPaint());
+ return surf->makeImageSnapshot();
+}
+
+/*
+ * Build a blob with more than one typeface.
+ * Draw it into an offscreen,
+ * then serialize and deserialize,
+ * Then draw the new instance and assert it draws the same as the original.
+ */
+DEF_TEST(TextBlob_serialize, reporter) {
+ SkTextBlobBuilder builder;
+
+ sk_sp<SkTypeface> tf0;
+ sk_sp<SkTypeface> tf1 = SkTypeface::MakeFromName("Times", SkFontStyle());
+
+ add_run(&builder, "Hello", 10, 20, tf0);
+ add_run(&builder, "World", 10, 40, tf1);
+ sk_sp<SkTextBlob> blob0 = builder.make();
+ sk_sp<SkImage> img0 = render(blob0.get());
+
+ SkTDArray<SkTypeface*> array;
+ sk_sp<SkData> data = blob0->serialize([&array](SkTypeface* tf) {
+ if (array.find(tf) < 0) {
+ *array.append() = tf;
+ }
+ });
+ REPORTER_ASSERT(reporter, array.count() > 0);
+
+ sk_sp<SkTextBlob> blob1 = SkTextBlob::Deserialize(data->data(), data->size(),
+ [&array, reporter](uint32_t uniqueID) {
+ for (int i = 0; i < array.count(); ++i) {
+ if (array[i]->uniqueID() == uniqueID) {
+ return sk_ref_sp(array[i]);
+ }
+ }
+ REPORTER_ASSERT(reporter, false);
+ return sk_sp<SkTypeface>(nullptr);
+ });
+ sk_sp<SkImage> img1 = render(blob1.get());
+
+ REPORTER_ASSERT(reporter, img0->width() == img1->width());
+ REPORTER_ASSERT(reporter, img0->height() == img1->height());
+
+ sk_sp<SkData> enc0(img0->encode());
+ sk_sp<SkData> enc1(img1->encode());
+ REPORTER_ASSERT(reporter, enc0->equals(enc1.get()));
+ if (false) { // in case you want to actually see the images...
+ SkFILEWStream("textblob_serialize_img0.png").write(enc0->data(), enc0->size());
+ SkFILEWStream("textblob_serialize_img1.png").write(enc1->data(), enc1->size());
+ }
+}