public OpenGLTextureSamplerManager(OpenGLExtensions extensions)
{
_dsaAvailable = extensions.ARB_DirectStateAccess;
_maxTextureUnits = GL.GetInteger(GetPName.MaxCombinedTextureImageUnits);
_maxTextureUnits = Math.Max(_maxTextureUnits, 8); // OpenGL spec indicates that implementations must support at least 8.
_textureUnitTextures = new OpenGLTextureBinding[_maxTextureUnits];
_textureUnitSamplers = new BoundSamplerStateInfo[_maxTextureUnits];
}
public OpenGLRenderContext(Window window, OpenGLPlatformContextInfo platformContext)
{
_resourceFactory = new OpenGLResourceFactory();
RenderCapabilities = new RenderCapabilities(true, true);
_swapBufferFunc = platformContext.SwapBuffer;
GraphicsContext.GetAddressDelegate getAddressFunc = s => platformContext.GetProcAddress(s);
GraphicsContext.GetCurrentContextDelegate getCurrentContextFunc = () => new ContextHandle(platformContext.GetCurrentContext());
_openGLGraphicsContext = new GraphicsContext(new ContextHandle(platformContext.ContextHandle), getAddressFunc, getCurrentContextFunc);
_openGLGraphicsContext.LoadAll();
// NOTE: I am binding a single VAO globally.
_vertexArrayID = GL.GenVertexArray();
GL.BindVertexArray(_vertexArrayID);
_defaultFramebuffer = new OpenGLDefaultFramebuffer(window.Width, window.Height);
OnWindowResized(window.Width, window.Height);
SetInitialStates();
PostContextCreated();
int extensionCount = GL.GetInteger(GetPName.NumExtensions);
HashSet <string> extensions = new HashSet <string>();
for (int i = 0; i < extensionCount; i++)
{
extensions.Add(GL.GetString(StringNameIndexed.Extensions, i));
}
_extensions = new OpenGLExtensions(extensions);
_textureSamplerManager = new OpenGLTextureSamplerManager(_extensions);
_maxConstantBufferSlots = GL.GetInteger(GetPName.MaxUniformBufferBindings);
_constantBuffersBySlot = new OpenGLConstantBuffer[_maxConstantBufferSlots];
_newConstantBuffersBySlot = new OpenGLConstantBuffer[_maxConstantBufferSlots];
_maxTextureUnits = GL.GetInteger(GetPName.MaxTextureImageUnits);
_maxVertexAttributeSlots = GL.GetInteger(GetPName.MaxVertexAttribs);
_vertexAttribDivisors = new int[_maxVertexAttributeSlots];
}