public WebGL2Framebuffer(int width, int height, int colourTextures, TextureFormat textureColourFormat, TextureFormat?textureDepthFormat = null)
{
if (colourTextures < 1)
{
throw new CKGLException("Must have at least 1 colour texture.");
}
if (colourTextures > (int)GL.getParameter(MAX_COLOR_ATTACHMENTS_Static) || colourTextures > (int)GL.getParameter(MAX_DRAW_BUFFERS_Static))
{
throw new CKGLException("Too many colour textures.");
}
if (textureColourFormat.ToWebGL2PixelFormat() == DEPTH_COMPONENT || textureColourFormat.ToWebGL2PixelFormat() == DEPTH_STENCIL)
{
throw new CKGLException("textureColourFormat cannot be a depth(stencil) texture.");
}
if (textureDepthFormat.HasValue && !(textureDepthFormat.Value.ToWebGL2PixelFormat() == DEPTH_COMPONENT || textureDepthFormat.Value.ToWebGL2PixelFormat() == DEPTH_STENCIL))
{
throw new CKGLException("textureDepthFormat is not a depth(stencil) texture.");
}
this.width = width;
this.height = height;
camera2D.Width = width;
camera2D.Height = height;
id = GL.createFramebuffer();
Bind();
Textures = new Texture[colourTextures];
double[] drawBuffers = new double[colourTextures];
for (int i = 0; i < colourTextures; i++)
{
Textures[i] = Texture.Create2D(Width, Height, textureColourFormat);
drawBuffers[i] = COLOR_ATTACHMENT0 + i;
GL.framebufferTexture2D(FRAMEBUFFER, COLOR_ATTACHMENT0 + i, (Textures[i] as WebGL2Texture).TextureTarget, (Textures[i] as WebGL2Texture).ID, 0);
Textures[i].Unbind();
CheckStatus();
}
GL.drawBuffers(drawBuffers);
CheckStatus();
if (textureDepthFormat.HasValue)
{
DepthStencilTexture = Texture.Create2D(Width, Height, textureDepthFormat.Value);
GL.framebufferTexture2D(FRAMEBUFFER, textureDepthFormat.Value.ToWebGL2TextureAttachment(), (DepthStencilTexture as WebGL2Texture).TextureTarget, (DepthStencilTexture as WebGL2Texture).ID, 0);
DepthStencilTexture.Unbind();
CheckStatus();
}
}
