public static void Draw(BeginMode beginMode, PositionTexture[] vertexData, uint handleTexture)
{
int primativeCount;
switch (beginMode)
{
case BeginMode.Triangles: primativeCount = vertexData.Length / 3; break;
case BeginMode.TriangleStrip: primativeCount = vertexData.Length - 2; break;
default: throw new ArgumentException();
}
if (primativeCount == 0) return;
GL.ActiveTexture(TextureUnit.Texture0);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, handleTexture);
GL.EnableClientState(EnableCap.VertexArray);
GL.ClientActiveTexture(TextureUnit.Texture0);
GL.EnableClientState(EnableCap.TextureCoordArray);
shader.Use();
shader.SetSamplerUniform("sampler0", 0);
unsafe
{
fixed (float* pData = &vertexData[0].x)
{
GL.VertexPointer(3, VertexPointerType.Float, PositionTexture.stride, (IntPtr)pData);
GL.TexCoordPointer(2, TexCoordPointerType.Float, PositionTexture.stride, (IntPtr)(pData + 3));
GL.DrawArrays(beginMode, 0, vertexData.Length);
}
}
GL.DisableClientState(EnableCap.VertexArray);
GL.DisableClientState(EnableCap.TextureCoordArray);
//GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
//GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.Disable(EnableCap.Texture2D);
}
private void UpdateFrameBuffer()
{
int texWidth = Width + 1;
int texHeight = Height + titleRectangle.Height + 1;
if(Extentions.IsAvailable(Extentions.ArbTextureNonPowerOfTwo) == false)
{
texWidth = (int)Math.Pow(2, Math.Ceiling(Math.Log(texWidth, 2)));
texHeight = (int)Math.Pow(2, Math.Ceiling(Math.Log(texHeight, 2)));
}
int maxTextureSize;
GL.GetInteger(GetPName.MaxTextureSize, out maxTextureSize);
if (texWidth > maxTextureSize) texWidth = maxTextureSize;
if (texHeight > maxTextureSize) texHeight = maxTextureSize;
bool requiresSquareTexture = false; //TODO Find the proper cap to test.
if (requiresSquareTexture)
{
texWidth = texHeight = Math.Max(texWidth, texHeight);
}
if (frameBuffer == null || frameBuffer.width != texWidth || frameBuffer.height != texHeight)
{
SafeDispose<FrameBuffer>(ref frameBuffer);
frameBuffer = new FrameBuffer(texWidth, texHeight);
modelViewProjection = Matrix4Helper.CreateOrthographicProjection(0, texWidth, 0, texHeight, 0, 1);
}
int top = titleRectangle.Y;
int left = titleRectangle.X;
int right = titleRectangle.X + texWidth - 1;
int bottom = titleRectangle.Y + texHeight - 1;
frameBufferQuad[0] = new PositionTexture(left, top, 0, 0, 1);
frameBufferQuad[1] = new PositionTexture(left, bottom, 0, 0, 0);
frameBufferQuad[2] = new PositionTexture(right, top, 0, 1, 1);
frameBufferQuad[3] = new PositionTexture(right, bottom, 0, 1, 0);
}