C++ SkFAIL函数代码示例

void GrGLProgram::setColor(const GrDrawState& drawState,
                           GrColor color,
                           SharedGLState* sharedState) {
    const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
    if (!drawState.hasColorVertexAttribute() || drawState.canIgnoreColorAttribute()) {
        switch (header.fColorInput) {
            case GrGLProgramDesc::kAttribute_ColorInput:
                SkASSERT(-1 != header.fColorAttributeIndex);
                if (sharedState->fConstAttribColor != color ||
                    sharedState->fConstAttribColorIndex != header.fColorAttributeIndex) {
                    // OpenGL ES only supports the float varieties of glVertexAttrib
                    GrGLfloat c[4];
                    GrColorToRGBAFloat(color, c);
                    GL_CALL(VertexAttrib4fv(header.fColorAttributeIndex, c));
                    sharedState->fConstAttribColor = color;
                    sharedState->fConstAttribColorIndex = header.fColorAttributeIndex;
                }
                break;
            case GrGLProgramDesc::kUniform_ColorInput:
                if (fColor != color && fBuilderOutput.fUniformHandles.fColorUni.isValid()) {
                    // OpenGL ES doesn't support unsigned byte varieties of glUniform
                    GrGLfloat c[4];
                    GrColorToRGBAFloat(color, c);
                    fUniformManager->set4fv(fBuilderOutput.fUniformHandles.fColorUni, 1, c);
                    fColor = color;
                }
                sharedState->fConstAttribColorIndex = -1;
                break;
            default:
                SkFAIL("Unexpected color type.");
        }
    } else {
        sharedState->fConstAttribColorIndex = -1;
    }
}

void setup_vk_attachment_description(VkAttachmentDescription* attachment,
                                     const AttachmentDesc& desc,
                                     VkImageLayout layout) {
    attachment->flags = 0;
    attachment->format = desc.fFormat;
    SkAssertResult(GrSampleCountToVkSampleCount(desc.fSamples, &attachment->samples));
    switch (layout) {
        case VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL:
            attachment->loadOp = desc.fLoadStoreOps.fLoadOp;
            attachment->storeOp = desc.fLoadStoreOps.fStoreOp;
            attachment->stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
            attachment->stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
            break;
        case VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL:
            attachment->loadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
            attachment->storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
            attachment->stencilLoadOp = desc.fLoadStoreOps.fLoadOp;
            attachment->stencilStoreOp = desc.fLoadStoreOps.fStoreOp;
            break;
        default:
            SkFAIL("Unexpected attachment layout");
    }

    attachment->initialLayout = layout;
    attachment->finalLayout = layout;
}

void GrOptDrawState::adjustFromBlendOpts() {

    switch (fBlendOptFlags) {
        case kNone_BlendOpt:
        case kSkipDraw_BlendOptFlag:
            break;
        case kCoverageAsAlpha_BlendOptFlag:
            fFlagBits |= kCoverageDrawing_StateBit;
            break;
        case kEmitCoverage_BlendOptFlag:
            fColor = 0xffffffff;
            fInputColorIsUsed = true;
            fColorStages.reset();
            this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding);
            break;
        case kEmitTransBlack_BlendOptFlag:
            fColor = 0;
            fCoverage = 0xff;
            fInputColorIsUsed = true;
            fInputCoverageIsUsed = true;
            fColorStages.reset();
            fCoverageStages.reset();
            this->removeFixedFunctionVertexAttribs(0x1 << kColor_GrVertexAttribBinding |
                                                   0x1 << kCoverage_GrVertexAttribBinding);
            break;
        default:
            SkFAIL("Unknown BlendOptFlag");

    }
}

GrIndexBuffer* GrGpu::createInstancedIndexBuffer(const uint16_t* pattern,
                                                 int patternSize,
                                                 int reps,
                                                 int vertCount,
                                                 bool isDynamic) {
    size_t bufferSize = patternSize * reps * sizeof(uint16_t);
    GrGpu* me = const_cast<GrGpu*>(this);
    GrIndexBuffer* buffer = me->createIndexBuffer(bufferSize, isDynamic);
    if (buffer) {
        uint16_t* data = (uint16_t*) buffer->map();
        bool useTempData = (NULL == data);
        if (useTempData) {
            data = SkNEW_ARRAY(uint16_t, reps * patternSize);
        }
        for (int i = 0; i < reps; ++i) {
            int baseIdx = i * patternSize;
            uint16_t baseVert = (uint16_t)(i * vertCount);
            for (int j = 0; j < patternSize; ++j) {
                data[baseIdx+j] = baseVert + pattern[j];
            }
        }
        if (useTempData) {
            if (!buffer->updateData(data, bufferSize)) {
                SkFAIL("Can't get indices into buffer!");
            }
            SkDELETE_ARRAY(data);
        } else {
            buffer->unmap();
        }
    }
    return buffer;
}

void GrGLConvolutionEffect::onSetData(const GrGLSLProgramDataManager& pdman,
                                      const GrProcessor& processor) {
    const GrConvolutionEffect& conv = processor.cast<GrConvolutionEffect>();
    GrTexture& texture = *conv.texture(0);

    float imageIncrement[2] = { 0 };
    float ySign = texture.origin() != kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f;
    switch (conv.direction()) {
        case Gr1DKernelEffect::kX_Direction:
            imageIncrement[0] = 1.0f / texture.width();
            break;
        case Gr1DKernelEffect::kY_Direction:
            imageIncrement[1] = ySign / texture.height();
            break;
        default:
            SkFAIL("Unknown filter direction.");
    }
    pdman.set2fv(fImageIncrementUni, 1, imageIncrement);
    if (conv.useBounds()) {
        const float* bounds = conv.bounds();
        if (Gr1DKernelEffect::kY_Direction == conv.direction() &&
            texture.origin() != kTopLeft_GrSurfaceOrigin) {
            pdman.set2f(fBoundsUni, 1.0f - bounds[1], 1.0f - bounds[0]);
        } else {
            pdman.set2f(fBoundsUni, bounds[0], bounds[1]);
        }
    }
    int width = Gr1DKernelEffect::WidthFromRadius(conv.radius());

    int arrayCount = (width + 3) / 4;
    SkASSERT(4 * arrayCount >= width);
    pdman.set4fv(fKernelUni, arrayCount, conv.kernel());
}

void GrGLMorphologyEffect::setData(const GrGLProgramDataManager& pdman,
                                   const GrProcessor& proc) {
    const GrMorphologyEffect& m = proc.cast<GrMorphologyEffect>();
    GrTexture& texture = *m.texture(0);
    // the code we generated was for a specific kernel radius, direction and bound usage
    SkASSERT(m.radius() == fRadius);
    SkASSERT(m.direction() == fDirection);
    SkASSERT(m.useRange() == fUseRange);

    float pixelSize = 0.0f;
    switch (fDirection) {
        case Gr1DKernelEffect::kX_Direction:
            pixelSize = 1.0f / texture.width();
            break;
        case Gr1DKernelEffect::kY_Direction:
            pixelSize = 1.0f / texture.height();
            break;
        default:
            SkFAIL("Unknown filter direction.");
    }
    pdman.set1f(fPixelSizeUni, pixelSize);

    if (fUseRange) {
        const float* range = m.range();
        if (fDirection && texture.origin() == kBottomLeft_GrSurfaceOrigin) {
            pdman.set2f(fRangeUni, 1.0f - range[1], 1.0f - range[0]);
        } else {
            pdman.set2f(fRangeUni, range[0], range[1]);
        }
    }
}

void GrProcessorTestFactory<GrGeometryProcessor>::VerifyFactoryCount() {
    if (kGPFactoryCount != GetFactories()->count()) {
        SkDebugf("\nExpected %d geometry processor factories, found %d.\n",
                 kGPFactoryCount, GetFactories()->count());
        SkFAIL("Wrong number of geometry processor factories!");
    }
}

GrResourceIOProcessor::ImageStorageAccess::ImageStorageAccess(sk_sp<GrTexture> texture,
                                                              GrIOType ioType,
                                                              GrSLMemoryModel memoryModel,
                                                              GrSLRestrict restrict,
                                                              GrShaderFlags visibility) {
    SkASSERT(texture);
    fTexture.set(texture.release(), ioType);
    fMemoryModel = memoryModel;
    fRestrict = restrict;
    fVisibility = visibility;
    // We currently infer this from the config. However, we could allow the client to specify
    // a format that is different but compatible with the config.
    switch (fTexture.get()->config()) {
        case kRGBA_8888_GrPixelConfig:
            fFormat = GrImageStorageFormat::kRGBA8;
            break;
        case kRGBA_8888_sint_GrPixelConfig:
            fFormat = GrImageStorageFormat::kRGBA8i;
            break;
        case kRGBA_half_GrPixelConfig:
            fFormat = GrImageStorageFormat::kRGBA16f;
            break;
        case kRGBA_float_GrPixelConfig:
            fFormat = GrImageStorageFormat::kRGBA32f;
            break;
        default:
            SkFAIL("Config is not (yet) supported as image storage.");
            break;
    }
}

const GrIndexBuffer* GrGpu::getQuadIndexBuffer() const {
    if (NULL == fQuadIndexBuffer) {
        static const int SIZE = sizeof(uint16_t) * 6 * MAX_QUADS;
        GrGpu* me = const_cast<GrGpu*>(this);
        fQuadIndexBuffer = me->createIndexBuffer(SIZE, false);
        if (NULL != fQuadIndexBuffer) {
            uint16_t* indices = (uint16_t*)fQuadIndexBuffer->map();
            if (NULL != indices) {
                fill_indices(indices, MAX_QUADS);
                fQuadIndexBuffer->unmap();
            } else {
                indices = (uint16_t*)sk_malloc_throw(SIZE);
                fill_indices(indices, MAX_QUADS);
                if (!fQuadIndexBuffer->updateData(indices, SIZE)) {
                    fQuadIndexBuffer->unref();
                    fQuadIndexBuffer = NULL;
                    SkFAIL("Can't get indices into buffer!");
                }
                sk_free(indices);
            }
        }
    }

    return fQuadIndexBuffer;
}

void SkBaseDevice::drawTextBlob(const SkDraw& draw, const SkTextBlob* blob, SkScalar x, SkScalar y,
                                const SkPaint &paint) {

    SkPaint runPaint = paint;

    SkTextBlob::RunIterator it(blob);
    while (!it.done()) {
        size_t textLen = it.glyphCount() * sizeof(uint16_t);
        const SkPoint& offset = it.offset();
        // applyFontToPaint() always overwrites the exact same attributes,
        // so it is safe to not re-seed the paint.
        it.applyFontToPaint(&runPaint);

        switch (it.positioning()) {
        case SkTextBlob::kDefault_Positioning:
            this->drawText(draw, it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint);
            break;
        case SkTextBlob::kHorizontal_Positioning:
            this->drawPosText(draw, it.glyphs(), textLen, it.pos(), 1,
                              SkPoint::Make(x, y + offset.y()), runPaint);
            break;
        case SkTextBlob::kFull_Positioning:
            this->drawPosText(draw, it.glyphs(), textLen, it.pos(), 2,
                              SkPoint::Make(x, y), runPaint);
            break;
        default:
            SkFAIL("unhandled positioning mode");
        }

        it.next();
    }
}

void GrGLPathTexGenProgramEffects::setPathTexGenState(GrGpuGL* gpu,
                                              const GrDrawEffect& drawEffect,
                                              int effectIdx) {
    uint32_t totalKey = fTransforms[effectIdx].fTransformKey;
    int texCoordIndex = fTransforms[effectIdx].fTexCoordIndex;
    int numTransforms = drawEffect.effect()->numTransforms();
    for (int t = 0; t < numTransforms; ++t) {
        switch (get_matrix_type(totalKey, t)) {
            case kNoPersp_MatrixType: {
                const SkMatrix& transform = get_transform_matrix(drawEffect, t);
                gpu->enablePathTexGen(texCoordIndex++,
                                      GrGpuGL::kST_PathTexGenComponents,
                                      transform);
                break;
            }
            case kGeneral_MatrixType: {
                const SkMatrix& transform = get_transform_matrix(drawEffect, t);
                gpu->enablePathTexGen(texCoordIndex++,
                                      GrGpuGL::kSTR_PathTexGenComponents,
                                      transform);
                break;
            }
            default:
                SkFAIL("Unexpected matrixs type.");
        }
    }
}

void GrGLVertexProgramEffects::emitTransforms(GrGLFullShaderBuilder* builder,
                                              const GrDrawEffect& drawEffect,
                                              TransformedCoordsArray* outCoords) {
    SkTArray<Transform, true>& transforms = fTransforms.push_back();
    uint32_t totalKey = GenTransformKey(drawEffect);
    int numTransforms = drawEffect.effect()->numTransforms();
    transforms.push_back_n(numTransforms);
    for (int t = 0; t < numTransforms; t++) {
        GrSLType varyingType = kVoid_GrSLType;
        const char* uniName;
        switch (get_matrix_type(totalKey, t)) {
            case kNoPersp_MatrixType:
                uniName = "StageMatrix";
                varyingType = kVec2f_GrSLType;
                break;
            case kGeneral_MatrixType:
                uniName = "StageMatrix";
                varyingType = kVec3f_GrSLType;
                break;
            default:
                SkFAIL("Unexpected key.");
        }
        SkString suffixedUniName;
        if (0 != t) {
            suffixedUniName.append(uniName);
            suffixedUniName.appendf("_%i", t);
            uniName = suffixedUniName.c_str();
        }
        transforms[t].fHandle = builder->addUniform(GrGLShaderBuilder::kVertex_Visibility,
                                                    kMat33f_GrSLType,
                                                    uniName,
                                                    &uniName);

        const char* varyingName = "MatrixCoord";
        SkString suffixedVaryingName;
        if (0 != t) {
            suffixedVaryingName.append(varyingName);
            suffixedVaryingName.appendf("_%i", t);
            varyingName = suffixedVaryingName.c_str();
        }
        const char* vsVaryingName;
        const char* fsVaryingName;
        builder->addVarying(varyingType, varyingName, &vsVaryingName, &fsVaryingName);

        const GrGLShaderVar& coords = kPosition_GrCoordSet == get_source_coords(totalKey, t) ?
                                          builder->positionAttribute() :
                                          builder->localCoordsAttribute();
        // varying = matrix * coords (logically)
        SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
        if (kVec2f_GrSLType == varyingType) {
            builder->vsCodeAppendf("\t%s = (%s * vec3(%s, 1)).xy;\n",
                                   vsVaryingName, uniName, coords.c_str());
        } else {
            builder->vsCodeAppendf("\t%s = %s * vec3(%s, 1);\n",
                                   vsVaryingName, uniName, coords.c_str());
        }
        SkNEW_APPEND_TO_TARRAY(outCoords, TransformedCoords,
                               (SkString(fsVaryingName), varyingType));
    }
}

static void write_png(const png_bytep rgba, png_uint_32 width, png_uint_32 height, SkWStream& out) {
    png_structp png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
    SkASSERT(png != nullptr);
    png_infop info_ptr = png_create_info_struct(png);
    SkASSERT(info_ptr != nullptr);
    if (setjmp(png_jmpbuf(png))) {
        SkFAIL("png encode error");
    }
    png_set_IHDR(png, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
                 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
    png_set_compression_level(png, 1);
    png_bytepp rows = (png_bytepp) sk_malloc_throw(height * sizeof(png_byte*));
    png_bytep pixels = (png_bytep) sk_malloc_throw(width * height * 3);
    for (png_size_t y = 0; y < height; ++y) {
        const png_bytep src = rgba + y * width * 4;
        rows[y] = pixels + y * width * 3;
        // convert from RGBA to RGB
        for (png_size_t x = 0; x < width; ++x) {
            rows[y][x * 3] = src[x * 4];
            rows[y][x * 3 + 1] = src[x * 4 + 1];
            rows[y][x * 3 + 2] = src[x * 4 + 2];
        }
    }
    png_set_filter(png, 0, PNG_NO_FILTERS);
    png_set_rows(png, info_ptr, &rows[0]);
    png_set_write_fn(png, &out, write_png_callback, NULL);
    png_write_png(png, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
    png_destroy_write_struct(&png, NULL);
    sk_free(rows);
}

static void update_degenerate_test(DegenerateTestData* data, const SkPoint& pt) {
    switch (data->fStage) {
        case DegenerateTestData::kInitial:
            data->fFirstPoint = pt;
            data->fStage = DegenerateTestData::kPoint;
            break;
        case DegenerateTestData::kPoint:
            if (pt.distanceToSqd(data->fFirstPoint) > kCloseSqd) {
                data->fLineNormal = pt - data->fFirstPoint;
                data->fLineNormal.normalize();
                data->fLineNormal.setOrthog(data->fLineNormal);
                data->fLineC = -data->fLineNormal.dot(data->fFirstPoint);
                data->fStage = DegenerateTestData::kLine;
            }
            break;
        case DegenerateTestData::kLine:
            if (SkScalarAbs(data->fLineNormal.dot(pt) + data->fLineC) > kClose) {
                data->fStage = DegenerateTestData::kNonDegenerate;
            }
        case DegenerateTestData::kNonDegenerate:
            break;
        default:
            SkFAIL("Unexpected degenerate test stage.");
    }
}

void drawTestCase(SkCanvas* canvas, const char* text, SkScalar y, const SkPaint& paint) {
        SkScalar widths[kMaxStringLength];
        SkScalar posX[kMaxStringLength];
        SkPoint pos[kMaxStringLength];
        int length = SkToInt(strlen(text));
        SkASSERT(length <= kMaxStringLength);

        paint.getTextWidths(text, length, widths);

        float originX;
        switch (paint.getTextAlign()) {
            case SkPaint::kRight_Align: originX = 1; break;
            case SkPaint::kCenter_Align: originX = 0.5f; break;
            case SkPaint::kLeft_Align: originX = 0; break;
            default: SkFAIL("Invalid paint origin"); return;
        }

        float x = kTextHeight;
        for (int i = 0; i < length; ++i) {
            posX[i] = x + originX * widths[i];
            pos[i].set(posX[i], i ? pos[i - 1].y() + 3 : y + kTextHeight);
            x += widths[i];
        }

        canvas->drawPosTextH(text, length, posX, y, paint);
        canvas->drawPosText(text, length, pos, paint);
}