Method TextureBuffer

Source/Main/engine.cpp:203–277

    Sizei texSize;

    TextureBuffer(ovrSession session, bool rendertarget, bool displayableOnHmd, Sizei size, int mipLevels, unsigned char* data, int sampleCount) : Session(session),
                                                                                                                                                   TextureChain(NULL),
                                                                                                                                                   texId(0),
                                                                                                                                                   fboId(0),
                                                                                                                                                   texSize(0, 0) {
        UNREFERENCED_PARAMETER(sampleCount);

        assert(sampleCount <= 1);  // The code doesn't currently handle MSAA textures.

        texSize = size;

        if (displayableOnHmd) {
            // This texture isn't necessarily going to be a rendertarget, but it usually is.
            assert(session);           // No HMD? A little odd.
            assert(sampleCount == 1);  // ovr_CreateSwapTextureSetD3D11 doesn't support MSAA.

            ovrTextureSwapChainDesc desc = {};
            desc.Type = ovrTexture_2D;
            desc.ArraySize = 1;
            desc.Width = size.w;
            desc.Height = size.h;
            desc.MipLevels = 1;
            desc.Format = OVR_FORMAT_R8G8B8A8_UNORM_SRGB;
            desc.SampleCount = 1;
            desc.StaticImage = ovrFalse;

            ovrResult result = ovr_CreateTextureSwapChainGL(Session, &desc, &TextureChain);

            int length = 0;
            ovr_GetTextureSwapChainLength(session, TextureChain, &length);

            if (OVR_SUCCESS(result)) {
                for (int i = 0; i < length; ++i) {
                    GLuint chainTexId;
                    ovr_GetTextureSwapChainBufferGL(Session, TextureChain, i, &chainTexId);
                    glBindTexture(GL_TEXTURE_2D, chainTexId);

                    if (rendertarget) {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
                    } else {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
                    }
                }
            }
        } else {
            glGenTextures(1, &texId);
            glBindTexture(GL_TEXTURE_2D, texId);

            if (rendertarget) {
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);