Beispiel #1
0
 static void AddRun(const SkFont& font, int count, SkTextBlobRunIterator::GlyphPositioning pos,
                    const SkPoint& offset, SkTextBlobBuilder& builder,
                    const SkRect* bounds = nullptr) {
     switch (pos) {
     case SkTextBlobRunIterator::kDefault_Positioning: {
         const SkTextBlobBuilder::RunBuffer& rb = builder.allocRun(font, count, offset.x(),
                                                                   offset.y(), bounds);
         for (int i = 0; i < count; ++i) {
             rb.glyphs[i] = i;
         }
     } break;
     case SkTextBlobRunIterator::kHorizontal_Positioning: {
         const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPosH(font, count, offset.y(),
                                                                       bounds);
         for (int i = 0; i < count; ++i) {
             rb.glyphs[i] = i;
             rb.pos[i] = SkIntToScalar(i);
         }
     } break;
     case SkTextBlobRunIterator::kFull_Positioning: {
         const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPos(font, count, bounds);
         for (int i = 0; i < count; ++i) {
             rb.glyphs[i] = i;
             rb.pos[i * 2] = SkIntToScalar(i);
             rb.pos[i * 2 + 1] = -SkIntToScalar(i);
         }
     } break;
     default:
         SK_ABORT("unhandled positioning value");
     }
 }
Beispiel #2
0
static void drawKernText(SkCanvas* canvas, const void* text, size_t len,
                         SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint) {
    SkTypeface* face = font.getTypefaceOrDefault();
    if (!face) {
        canvas->drawSimpleText(text, len, SkTextEncoding::kUTF8, x, y, font, paint);
        return;
    }

    SkAutoSTMalloc<128, uint16_t> glyphStorage(len);
    uint16_t* glyphs = glyphStorage.get();
    int glyphCount = font.textToGlyphs(text, len, SkTextEncoding::kUTF8, glyphs, len);
    if (glyphCount < 1) {
        return;
    }

    SkAutoSTMalloc<128, int32_t> adjustmentStorage(glyphCount - 1);
    int32_t* adjustments = adjustmentStorage.get();
    if (!face->getKerningPairAdjustments(glyphs, glyphCount, adjustments)) {
        canvas->drawSimpleText(text, len, SkTextEncoding::kUTF8, x, y, font, paint);
        return;
    }


    SkTextBlobBuilder builder;
    auto rec = builder.allocRunPos(font, glyphCount);
    memcpy(rec.glyphs, glyphs, glyphCount * sizeof(SkGlyphID));
    getGlyphPositions(font, glyphs, glyphCount, x, y, rec.points());
    applyKerning(rec.points(), adjustments, glyphCount, font);

    canvas->drawTextBlob(builder.make(), 0, 0, paint);
}
Beispiel #3
0
    sk_sp<SkTextBlob> makeBlob(unsigned blobIndex) {
        SkTextBlobBuilder builder;

        SkFont font;
        font.setSubpixel(true);
        font.setEdging(SkFont::Edging::kAntiAlias);
        font.setTypeface(fTypeface);

        for (unsigned l = 0; l < SK_ARRAY_COUNT(blobConfigs[blobIndex]); ++l) {
            unsigned currentGlyph = 0;

            for (unsigned c = 0; c < SK_ARRAY_COUNT(blobConfigs[blobIndex][l]); ++c) {
                const BlobCfg* cfg = &blobConfigs[blobIndex][l][c];
                unsigned count = cfg->count;

                if (count > fGlyphs.count() - currentGlyph) {
                    count = fGlyphs.count() - currentGlyph;
                }
                if (0 == count) {
                    break;
                }

                font.setSize(kFontSize * cfg->scale);
                const SkScalar advanceX = font.getSize() * 0.85f;
                const SkScalar advanceY = font.getSize() * 1.5f;

                SkPoint offset = SkPoint::Make(currentGlyph * advanceX + c * advanceX,
                                               advanceY * l);
                switch (cfg->pos) {
                case kDefault_Pos: {
                    const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, count,
                                                                               offset.x(),
                                                                               offset.y());
                    memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
                } break;
                case kScalar_Pos: {
                    const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPosH(font, count,
                                                                                   offset.y());
                    SkTDArray<SkScalar> pos;
                    for (unsigned i = 0; i < count; ++i) {
                        *pos.append() = offset.x() + i * advanceX;
                    }

                    memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
                    memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar));
                } break;
                case kPoint_Pos: {
                    const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPos(font, count);

                    SkTDArray<SkScalar> pos;
                    for (unsigned i = 0; i < count; ++i) {
                        *pos.append() = offset.x() + i * advanceX;
                        *pos.append() = offset.y() + i * (advanceY / count);
                    }

                    memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
                    memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar) * 2);
                } break;
                default:
                    SK_ABORT("unhandled pos value");
                }

                currentGlyph += count;
            }
        }

        return builder.make();
    }
Beispiel #4
0
    // This unit test verifies blob bounds computation.
    static void TestBounds(skiatest::Reporter* reporter) {
        SkTextBlobBuilder builder;
        SkFont font;

        // Explicit bounds.
        {
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, !blob);
        }

        {
            SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
            builder.allocRun(font, 16, 0, 0, &r1);
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, blob->bounds() == r1);
        }

        {
            SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
            builder.allocRunPosH(font, 16, 0, &r1);
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, blob->bounds() == r1);
        }

        {
            SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
            builder.allocRunPos(font, 16, &r1);
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, blob->bounds() == r1);
        }

        {
            SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
            SkRect r2 = SkRect::MakeXYWH(15, 20, 50, 50);
            SkRect r3 = SkRect::MakeXYWH(0, 5, 10, 5);

            builder.allocRun(font, 16, 0, 0, &r1);
            builder.allocRunPosH(font, 16, 0, &r2);
            builder.allocRunPos(font, 16, &r3);

            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, blob->bounds() == SkRect::MakeXYWH(0, 5, 65, 65));
        }

        {
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, !blob);
        }

        // Implicit bounds

        {
            // Exercise the empty bounds path, and ensure that RunRecord-aligned pos buffers
            // don't trigger asserts (http://crbug.com/542643).
            SkFont font;
            font.setSize(0);

            const char* txt = "BOOO";
            const size_t txtLen = strlen(txt);
            const int glyphCount = font.countText(txt, txtLen, SkTextEncoding::kUTF8);
            const SkTextBlobBuilder::RunBuffer& buffer = builder.allocRunPos(font, glyphCount);

            font.textToGlyphs(txt, txtLen, SkTextEncoding::kUTF8, buffer.glyphs, glyphCount);

            memset(buffer.pos, 0, sizeof(SkScalar) * glyphCount * 2);
            sk_sp<SkTextBlob> blob(builder.make());
            REPORTER_ASSERT(reporter, blob->bounds().isEmpty());
        }
    }