private void LoadShaderAsset(BasicShaderAssetData shaderAsset)
{
if (shaderAsset.IsLoaded)
{
return;
}
string vs = Utils.LoadEmbeddedResourceAsString(shaderAsset.VertexShaderName);
string fs = Utils.LoadEmbeddedResourceAsString(shaderAsset.FragmentShaderName);
int status_code;
string info;
int vertexObject = GL.CreateShader(ShaderType.VertexShader);
int fragmentObject = GL.CreateShader(ShaderType.FragmentShader);
shaderAsset.VertexObjectHandle = vertexObject;
shaderAsset.FragmentObjectHandle = fragmentObject;
GL.ShaderSource(vertexObject, vs);
GL.CompileShader(vertexObject);
GL.GetShaderInfoLog(vertexObject, out info);
GL.GetShader(vertexObject, ShaderParameter.CompileStatus, out status_code);
if (status_code != 1)
{
throw new ApplicationException(info);
}
GL.ShaderSource(fragmentObject, fs);
GL.CompileShader(fragmentObject);
GL.GetShaderInfoLog(fragmentObject, out info);
GL.GetShader(fragmentObject, ShaderParameter.CompileStatus, out status_code);
if (status_code != 1)
{
throw new ApplicationException(info);
}
int program = GL.CreateProgram();
GL.AttachShader(program, fragmentObject);
GL.AttachShader(program, vertexObject);
shaderAsset.ProgramHandle = program;
GL.BindAttribLocation(program, VertexAttribIndex.Vertex, "in_position");
GL.BindAttribLocation(program, VertexAttribIndex.Normal, "in_normal");
GL.BindAttribLocation(program, VertexAttribIndex.Uv, "in_uv");
GL.LinkProgram(program);
shaderAsset.ModelviewProjectionMatrixLocation = GL.GetUniformLocation(
program,
"modelview_projection_matrix");
shaderAsset.IsLoaded = true;
}
private void UnloadShaderAsset(BasicShaderAssetData shaderAsset)
{
if (shaderAsset.IsLoaded)
{
GL.DeleteProgram(shaderAsset.ProgramHandle);
GL.DeleteShader(shaderAsset.FragmentObjectHandle);
GL.DeleteShader(shaderAsset.VertexObjectHandle);
}
shaderAsset.IsLoaded = false;
}