C++ (Cpp) GrContext::getFontAtlasImage_ForTesting Examples

Example #1

File: SampleChineseFling.cpp Project: android/platform_external_skia

    void onDrawContent(SkCanvas* canvas) override {
        bool afterFirstFrame = fInitialized;
        if (!fInitialized) {
            this->init();
            fInitialized = true;
        }

        canvas->clear(0xFFDDDDDD);

        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(0xDE000000);
        paint.setTypeface(fTypeface);
        paint.setTextSize(11);
        paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);

        if (afterFirstFrame) {
#if SK_SUPPORT_GPU
            GrContext* grContext = canvas->getGrContext();
            if (grContext) {
                sk_sp<SkImage> image =
                grContext->getFontAtlasImage_ForTesting(GrMaskFormat::kA8_GrMaskFormat, 0);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(10.0f, 10.0f, 512.0f, 512.0), &paint);
                image = grContext->getFontAtlasImage_ForTesting(GrMaskFormat::kA8_GrMaskFormat, 1);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(522.0f, 10.0f, 512.f, 512.0f), &paint);
                image = grContext->getFontAtlasImage_ForTesting(GrMaskFormat::kA8_GrMaskFormat, 2);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(10.0f, 522.0f, 512.0f, 512.0f), &paint);
                image = grContext->getFontAtlasImage_ForTesting(GrMaskFormat::kA8_GrMaskFormat, 3);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(522.0f, 522.0f, 512.0f, 512.0f), &paint);
            }
#endif
        }

        canvas->scale(fScale, fScale);
        canvas->translate(0, fTranslate);
        fTranslate -= 0.5f;

        // draw a consistent run of the 'words' - one word per line
        SkScalar y = 0;
        for (int index = 0; index < kNumBlobs; ++index) {
            y += -fMetrics.fAscent;
            canvas->drawTextBlob(fBlobs[index], 0, y, paint);

            y += 3*(fMetrics.fDescent - fMetrics.fAscent + fMetrics.fLeading);
        }
    }