C++ SkDEBUGFAIL函数代码示例

SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height,
                                const SkRect* content) {
    if (width <= 0 || height <= 0) {
        return NULL;
    }

    SkRect outer = SkRect::MakeWH(width, height);
    SkRect inner;
    if (content) {
        inner = *content;
        if (!inner.intersect(outer)) {
            return NULL;
        }
    } else {
        inner = outer;
    }

    for (;;) {
        switch (fState) {
            case kBetweenPages_State:
                fState = kInPage_State;
                return this->onBeginPage(width, height, inner);
            case kInPage_State:
                this->endPage();
                break;
            case kClosed_State:
                return NULL;
        }
    }
    SkDEBUGFAIL("never get here");
    return NULL;
}

sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage* src,
                                                        SkColorSpace* colorSpace) {
    // Read the pixels out of the source image, with no conversion
    SkImageInfo info = as_IB(src)->onImageInfo();
    if (kUnknown_SkColorType == info.colorType()) {
        SkDEBUGFAIL("Unexpected color type");
        return nullptr;
    }

    size_t rowBytes = info.minRowBytes();
    size_t size = info.computeByteSize(rowBytes);
    if (SkImageInfo::ByteSizeOverflowed(size)) {
        return nullptr;
    }
    auto data = SkData::MakeUninitialized(size);
    if (!data) {
        return nullptr;
    }

    SkPixmap pm(info, data->writable_data(), rowBytes);
    if (!src->readPixels(pm, 0, 0, SkImage::kDisallow_CachingHint)) {
        return nullptr;
    }

    // Wrap them in a new image with a different color space
    return SkImage::MakeRasterData(info.makeColorSpace(sk_ref_sp(colorSpace)), data, rowBytes);
}

void Task::spawnChild(Task* task) {
    if (!task->usesGpu()) {
        fTaskRunner->add(task);
    } else {
        SkDEBUGFAIL("Sorry, we can't spawn GPU tasks. :(  See comment in TaskRunner::wait().");
    }
}

void GrGLBuffer::onUnmap() {
    if (this->wasDestroyed()) {
        return;
    }

    VALIDATE();
    SkASSERT(this->isMapped());
    if (0 == fBufferID) {
        fMapPtr = nullptr;
        return;
    }
    // bind buffer handles the dirty context
    switch (this->glCaps().mapBufferType()) {
        case GrGLCaps::kNone_MapBufferType:
            SkDEBUGFAIL("Shouldn't get here.");
            return;
        case GrGLCaps::kMapBuffer_MapBufferType: // fall through
        case GrGLCaps::kMapBufferRange_MapBufferType: {
            GrGLenum target = this->glGpu()->bindBuffer(fIntendedType, this);
            GL_CALL(UnmapBuffer(target));
            break;
        }
        case GrGLCaps::kChromium_MapBufferType:
            this->glGpu()->bindBuffer(fIntendedType, this); // TODO: Is this needed?
            GL_CALL(UnmapBufferSubData(fMapPtr));
            break;
    }
    fMapPtr = nullptr;
}

static void showPathContours(SkPath::Iter& iter, const char* pathName) {
    uint8_t verb;
    SkPoint pts[4];
    while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
        switch (verb) {
            case SkPath::kMove_Verb:
                SkDebugf("    %s.moveTo(%#1.9gf, %#1.9gf);\n", pathName, pts[0].fX, pts[0].fY);
                continue;
            case SkPath::kLine_Verb:
                SkDebugf("    %s.lineTo(%#1.9gf, %#1.9gf);\n", pathName, pts[1].fX, pts[1].fY);
                break;
            case SkPath::kQuad_Verb:
                SkDebugf("    %s.quadTo(%#1.9gf, %#1.9gf, %#1.9gf, %#1.9gf);\n", pathName,
                    pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY);
                break;
            case SkPath::kCubic_Verb:
                SkDebugf("    %s.cubicTo(%#1.9gf, %#1.9gf, %#1.9gf, %#1.9gf, %#1.9gf, %#1.9gf);\n",
                    pathName, pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY, pts[3].fX, pts[3].fY);
                break;
            case SkPath::kClose_Verb:
                SkDebugf("    %s.close();\n", pathName);
                break;
            default:
                SkDEBUGFAIL("bad verb");
                return;
        }
    }
}

const char* SkImageDecoder::GetFormatName(Format format) {
    switch (format) {
        case kUnknown_Format:
            return "Unknown Format";
        case kBMP_Format:
            return "BMP";
        case kGIF_Format:
            return "GIF";
        case kICO_Format:
            return "ICO";
        case kPKM_Format:
            return "PKM";
        case kKTX_Format:
            return "KTX";
        case kJPEG_Format:
            return "JPEG";
        case kPNG_Format:
            return "PNG";
        case kWBMP_Format:
            return "WBMP";
        case kWEBP_Format:
            return "WEBP";
        default:
            SkDEBUGFAIL("Invalid format type!");
    }
    return "Unknown Format";
}

static void set_paintflat(SkPaint* paint, SkFlattenable* obj, unsigned paintFlat) {
    SkASSERT(paintFlat < kCount_PaintFlats);
    switch (paintFlat) {
        case kColorFilter_PaintFlat:
            paint->setColorFilter((SkColorFilter*)obj);
            break;
        case kDrawLooper_PaintFlat:
            paint->setLooper((SkDrawLooper*)obj);
            break;
        case kMaskFilter_PaintFlat:
            paint->setMaskFilter((SkMaskFilter*)obj);
            break;
        case kPathEffect_PaintFlat:
            paint->setPathEffect((SkPathEffect*)obj);
            break;
        case kRasterizer_PaintFlat:
            paint->setRasterizer((SkRasterizer*)obj);
            break;
        case kShader_PaintFlat:
            paint->setShader((SkShader*)obj);
            break;
        case kImageFilter_PaintFlat:
            paint->setImageFilter((SkImageFilter*)obj);
            break;
        case kXfermode_PaintFlat:
            paint->setXfermode((SkXfermode*)obj);
            break;
        default:
            SkDEBUGFAIL("never gets here");
    }
}

static void drawFrame(SkBitmap* bm, const SavedImage* frame, const ColorMapObject* cmap)
{
    int transparent = -1;

    for (int i = 0; i < frame->ExtensionBlockCount; ++i) {
        ExtensionBlock* eb = frame->ExtensionBlocks + i;
        if (eb->Function == GRAPHICS_EXT_FUNC_CODE &&
                eb->ByteCount == 4) {
            bool has_transparency = ((eb->Bytes[0] & 1) == 1);
            if (has_transparency) {
                transparent = (unsigned char)eb->Bytes[3];
            }
        }
    }

    if (frame->ImageDesc.ColorMap != NULL) {
        // use local color table
        cmap = frame->ImageDesc.ColorMap;
    }

    if (cmap == NULL || cmap->ColorCount != (1 << cmap->BitsPerPixel)) {
        SkDEBUGFAIL("bad colortable setup");
        return;
    }

#if GIFLIB_MAJOR < 5
    // before GIFLIB 5, de-interlacing wasn't done by library at load time
    if (frame->ImageDesc.Interlace) {
        blitInterlace(bm, frame, cmap, transparent);
        return;
    }
#endif

    blitNormal(bm, frame, cmap, transparent);
}

/*  Fill out buffer with the compressed format Ganesh expects from a colortable
 based bitmap. [palette (colortable) + indices].

 At the moment Ganesh only supports 8bit version. If Ganesh allowed we others
 we could detect that the colortable.count is <= 16, and then repack the
 indices as nibbles to save RAM, but it would take more time (i.e. a lot
 slower than memcpy), so skipping that for now.

 Ganesh wants a full 256 palette entry, even though Skia's ctable is only as big
 as the colortable.count says it is.
 */
static void build_compressed_data(void* buffer, const SkBitmap& bitmap) {
    SkASSERT(SkBitmap::kIndex8_Config == bitmap.config());

    SkAutoLockPixels apl(bitmap);
    if (!bitmap.readyToDraw()) {
        SkDEBUGFAIL("bitmap not ready to draw!");
        return;
    }

    SkColorTable* ctable = bitmap.getColorTable();
    char* dst = (char*)buffer;

    memcpy(dst, ctable->lockColors(), ctable->count() * sizeof(SkPMColor));
    ctable->unlockColors(false);

    // always skip a full 256 number of entries, even if we memcpy'd fewer
    dst += kGrColorTableSize;

    if (bitmap.width() == bitmap.rowBytes()) {
        memcpy(dst, bitmap.getPixels(), bitmap.getSize());
    } else {
        // need to trim off the extra bytes per row
        size_t width = bitmap.width();
        size_t rowBytes = bitmap.rowBytes();
        const char* src = (const char*)bitmap.getPixels();
        for (int y = 0; y < bitmap.height(); y++) {
            memcpy(dst, src, width);
            src += rowBytes;
            dst += width;
        }
    }
}

static SkTypeface* find_best_face(const FamilyRec* family,
                                  SkTypeface::Style style) {
    SkTypeface* const* faces = family->fFaces;

    if (faces[style] != NULL) { // exact match
        return faces[style];
    }
    // look for a matching bold
    style = (SkTypeface::Style)(style ^ SkTypeface::kItalic);
    if (faces[style] != NULL) {
        return faces[style];
    }
    // look for the plain
    if (faces[SkTypeface::kNormal] != NULL) {
        return faces[SkTypeface::kNormal];
    }
    // look for anything
    for (int i = 0; i < 4; i++) {
        if (faces[i] != NULL) {
            return faces[i];
        }
    }
    // should never get here, since the faces list should not be empty
    SkDEBUGFAIL("faces list is empty");
    return NULL;
}

SkScalar SkPath1DPathEffect::next(SkPath* dst, SkScalar distance,
                                  SkPathMeasure& meas) const {
    switch (fStyle) {
    case kTranslate_Style: {
        SkPoint pos;
        if (meas.getPosTan(distance, &pos, nullptr)) {
            dst->addPath(fPath, pos.fX, pos.fY);
        }
    }
    break;
    case kRotate_Style: {
        SkMatrix matrix;
        if (meas.getMatrix(distance, &matrix)) {
            dst->addPath(fPath, matrix);
        }
    }
    break;
    case kMorph_Style:
        morphpath(dst, fPath, meas, distance);
        break;
    default:
        SkDEBUGFAIL("unknown Style enum");
        break;
    }
    return fAdvance;
}

const char* SkDrawCommand::GetCommandString(DrawType type) {
    switch (type) {
        case UNUSED: SkDEBUGFAIL("DrawType UNUSED\n"); break;
        case DRAW_CLEAR: return "Clear";
        case CLIP_PATH: return "Clip Path";
        case CLIP_REGION: return "Clip Region";
        case CLIP_RECT: return "Clip Rect";
        case CLIP_RRECT: return "Clip RRect";
        case CONCAT: return "Concat";
        case DRAW_BITMAP: return "Draw Bitmap";
        case DRAW_BITMAP_MATRIX: return "Draw Bitmap Matrix";
        case DRAW_BITMAP_NINE: return "Draw Bitmap Nine";
        case DRAW_BITMAP_RECT_TO_RECT: return "Draw Bitmap Rect";
        case DRAW_DATA: return "Draw Data";
        case DRAW_OVAL: return "Draw Oval";
        case DRAW_PAINT: return "Draw Paint";
        case DRAW_PATH: return "Draw Path";
        case DRAW_PICTURE: return "Draw Picture";
        case DRAW_POINTS: return "Draw Points";
        case DRAW_POS_TEXT: return "Draw Pos Text";
        case DRAW_POS_TEXT_H: return "Draw Pos Text H";
        case DRAW_RECT: return "Draw Rect";
        case DRAW_RRECT: return "Draw RRect";
        case DRAW_SPRITE: return "Draw Sprite";
        case DRAW_TEXT: return "Draw Text";
        case DRAW_TEXT_ON_PATH: return "Draw Text On Path";
        case DRAW_VERTICES: return "Draw Vertices";
        case RESTORE: return "Restore";
        case ROTATE: return "Rotate";
        case SAVE: return "Save";
        case SAVE_LAYER: return "Save Layer";
        case SCALE: return "Scale";
        case SET_MATRIX: return "Set Matrix";
        case SKEW: return "Skew";
        case TRANSLATE: return "Translate";
        case NOOP: return "NoOp";
        case BEGIN_COMMENT_GROUP: return "BeginCommentGroup";
        case COMMENT: return "Comment";
        case END_COMMENT_GROUP: return "EndCommentGroup";
        default:
            SkDebugf("DrawType error 0x%08x\n", type);
            SkASSERT(0);
            break;
    }
    SkDEBUGFAIL("DrawType UNUSED\n");
    return NULL;
}

    void add (DiffRecord* drp) {
        uint32_t mismatchValue;

        if (drp->fBase.fFilename.equals(drp->fComparison.fFilename)) {
            fResultsOfType[drp->fResult].push(new SkString(drp->fBase.fFilename));
        } else {
            SkString* blame = new SkString("(");
            blame->append(drp->fBase.fFilename);
            blame->append(", ");
            blame->append(drp->fComparison.fFilename);
            blame->append(")");
            fResultsOfType[drp->fResult].push(blame);
        }
        switch (drp->fResult) {
          case DiffRecord::kEqualBits_Result:
            fNumMatches++;
            break;
          case DiffRecord::kEqualPixels_Result:
            fNumMatches++;
            break;
          case DiffRecord::kDifferentSizes_Result:
            fNumMismatches++;
            break;
          case DiffRecord::kDifferentPixels_Result:
            fNumMismatches++;
            if (drp->fFractionDifference * 100 > fMaxMismatchPercent) {
                fMaxMismatchPercent = drp->fFractionDifference * 100;
            }
            mismatchValue = MAX3(drp->fMaxMismatchR, drp->fMaxMismatchG,
                                 drp->fMaxMismatchB);
            if (mismatchValue > fMaxMismatchV) {
                fMaxMismatchV = mismatchValue;
            }
            break;
          case DiffRecord::kCouldNotCompare_Result:
            fNumMismatches++;
            fStatusOfType[drp->fBase.fStatus][drp->fComparison.fStatus].push(
                    new SkString(drp->fBase.fFilename));
            break;
          case DiffRecord::kUnknown_Result:
            SkDEBUGFAIL("adding uncategorized DiffRecord");
            break;
          default:
            SkDEBUGFAIL("adding DiffRecord with unhandled fResult value");
            break;
        }
    }

void SkShader::shadeSpan16(int x, int y, uint16_t span16[], int count) {
    SkASSERT(span16);
    SkASSERT(count > 0);
    SkASSERT(this->canCallShadeSpan16());

    // basically, if we get here, the subclass screwed up
    SkDEBUGFAIL("kHasSpan16 flag is set, but shadeSpan16() not implemented");
}

void SkColorFilter::filterSpan16(const uint16_t s[], int count, uint16_t d[]) {
    SkASSERT(this->getFlags() & SkColorFilter::kHasFilter16_Flag);
    SkDEBUGFAIL("missing implementation of SkColorFilter::filterSpan16");

    if (d != s) {
        memcpy(d, s, count * sizeof(uint16_t));
    }
}