Exemplo n.º 1
0
GrXferBarrierType GrXferProcessor::xferBarrierType(const GrRenderTarget* rt,
                                                   const GrCaps& caps) const {
    SkASSERT(rt);
    if (static_cast<const GrSurface*>(rt) == this->getDstTexture()) {
        // Texture barriers are required when a shader reads and renders to the same texture.
        SkASSERT(caps.textureBarrierSupport());
        return kTexture_GrXferBarrierType;
    }
    return this->onXferBarrier(rt, caps);
}
Exemplo n.º 2
0
GrXPFactory::AnalysisProperties GrXPFactory::GetAnalysisProperties(
        const GrXPFactory* factory,
        const GrProcessorAnalysisColor& color,
        const GrProcessorAnalysisCoverage& coverage,
        const GrCaps& caps) {
    AnalysisProperties result;
    if (factory) {
        result = factory->analysisProperties(color, coverage, caps);
    } else {
        result = GrPorterDuffXPFactory::SrcOverAnalysisProperties(color, coverage, caps);
    }
    SkASSERT(!(result & AnalysisProperties::kRequiresDstTexture));
    if ((result & AnalysisProperties::kReadsDstInShader) &&
        !caps.shaderCaps()->dstReadInShaderSupport()) {
        result |= AnalysisProperties::kRequiresDstTexture;
        if (caps.textureBarrierSupport()) {
            result |= AnalysisProperties::kRequiresBarrierBetweenOverlappingDraws;
        }
    }
    return result;
}