// Inheritance exigences
void TGBufferCanvas::Init()
{
// Drawable data
m_output.width = m_width;
m_output.height = m_height;
// Creating the main frame buffer
m_frameBuffer = CreateFrameBuffer();
BindFrameBuffer(m_frameBuffer);
// Creating the textures
// Memory allocation
m_output.buffers.resize(5);
// The abledo buffer
TTextureInfo& albedo = m_output.buffers[0];
albedo.name = "albedo";
albedo.type = TTextureNature::COLOR;
albedo.offset = 0;
CreateTexture(albedo, m_width, m_height);
BindToFrameBuffer(albedo);
// The normal buffer
TTextureInfo& normal = m_output.buffers[1];
normal.name = "normal";
normal.type = TTextureNature::COLOR;
normal.offset = 1;
CreateTexture(normal, m_width, m_height);
BindToFrameBuffer(normal);
// The specular buffer
TTextureInfo& specular = m_output.buffers[2];
specular.name = "specular";
specular.type = TTextureNature::COLOR;
specular.offset = 2;
CreateTexture(specular, m_width, m_height);
BindToFrameBuffer(specular);
// Position Buffer
TTextureInfo& position = m_output.buffers[3];
position.name = "position";
position.type = TTextureNature::COLOR;
position.offset = 3;
CreateTexture(position, m_width, m_height);
BindToFrameBuffer(position);
// Depth buffer
TTextureInfo& depth = m_output.buffers[4];
depth.name = "depth";
depth.type = TTextureNature::DEPTH;
depth.offset = 4;
CreateTexture(depth, m_width, m_height);
BindToFrameBuffer(depth);
// Making sure everything is OK
CheckFrameBuffer();
UnBindFrameBuffer();
}
void FGLRenderer::BindToFrameBuffer(FMaterial *mat)
{
auto BaseLayer = static_cast<FHardwareTexture*>(mat->GetLayer(0, 0));
if (BaseLayer == nullptr)
{
// must create the hardware texture first
BaseLayer->BindOrCreate(mat->sourcetex, 0, 0, 0, 0);
FHardwareTexture::Unbind(0);
gl_RenderState.ClearLastMaterial();
}
BaseLayer->BindToFrameBuffer(mat->GetWidth(), mat->GetHeight());
}
void FGLRenderer::RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint, double FOV)
{
// This doesn't need to clear the fake flat cache. It can be shared between camera textures and the main view of a scene.
FMaterial * gltex = FMaterial::ValidateTexture(tex, false);
int width = gltex->TextureWidth();
int height = gltex->TextureHeight();
StartOffscreen();
BindToFrameBuffer(gltex);
IntRect bounds;
bounds.left = bounds.top = 0;
bounds.width = FHardwareTexture::GetTexDimension(gltex->GetWidth());
bounds.height = FHardwareTexture::GetTexDimension(gltex->GetHeight());
FRenderViewpoint texvp;
RenderViewpoint(texvp, Viewpoint, &bounds, FOV, (float)width / height, (float)width / height, false, false);
EndOffscreen();
tex->SetUpdated(true);
static_cast<OpenGLFrameBuffer*>(screen)->camtexcount++;
}
