skia/renderer/include/skia_factory.hpp

/*
 * Copyright 2022 Rive
 */

#ifndef _RIVE_SKIA_FACTORY_HPP_
#define _RIVE_SKIA_FACTORY_HPP_

#include "rive/factory.hpp"
#include <vector>

namespace rive
{

class SkiaFactory : public Factory
{
public:
    rcp<RenderBuffer> makeRenderBuffer(RenderBufferType,
                                       RenderBufferFlags,
                                       size_t) override;

    rcp<RenderShader> makeLinearGradient(float sx,
                                         float sy,
                                         float ex,
                                         float ey,
                                         const ColorInt colors[], // [count]
                                         const float stops[],     // [count]
                                         size_t count) override;

    rcp<RenderShader> makeRadialGradient(float cx,
                                         float cy,
                                         float radius,
                                         const ColorInt colors[], // [count]
                                         const float stops[],     // [count]
                                         size_t count) override;

    rcp<RenderPath> makeRenderPath(RawPath&, FillRule) override;

    rcp<RenderPath> makeEmptyRenderPath() override;

    rcp<RenderPaint> makeRenderPaint() override;

    rcp<RenderImage> decodeImage(Span<const uint8_t>) override;

    //
    // New virtual for access the platform's codecs
    //

    enum class ColorType
    {
        rgba,
        bgra,
    };
    enum class AlphaType
    {
        premul,
        opaque,
    };
    struct ImageInfo
    {
        size_t rowBytes; // number of bytes between rows
        uint32_t width;  // logical width in pixels
        uint32_t height; // logical height in pixels
        ColorType colorType;
        AlphaType alphaType;
    };

    // Clients can override this to provide access to the platform's decoders,
    // rather than solely relying on the codecs built into Skia. This allows for
    // the Skia impl to not have to duplicate the code for codecs that the
    // platform may already have.
    virtual std::vector<uint8_t> platformDecode(Span<const uint8_t>,
                                                ImageInfo* info)
    {
        return std::vector<uint8_t>(); // empty vector means decode failed
    }
};

} // namespace rive
#endif