public GlRenderTarget(OpenGLRenderer renderer, int width, int height)
{
// generate the FBO
GL.GenFramebuffers(1, out _fbo);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, _fbo);
// generate a depth buffer
GL.GenRenderbuffers(1, out _depthBuffer);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, _depthBuffer);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent16, width, height);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, _depthBuffer);
// generate a color buffer
GL.GenTextures(1, out _colorBuffer);
GL.BindTexture(TextureTarget.Texture2D, _colorBuffer);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba8, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMaxLevel, 0);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, _colorBuffer, 0);
// all done... or are we...?
FramebufferErrorCode status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
throw new Exception("Unable to create RenderTarget: " + status.ToString());
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
_width = width;
_height = height;
}
public GlTexture(OpenGLRenderer renderer, string name, BitmapSurface surface, bool mipmapped, bool premultiplyAlpha)
: base(name, surface)
{
_renderer = renderer;
if (premultiplyAlpha)
{
this.premultiplyAlpha();
}
convertToOpenGlTexture(true, false, mipmapped);
}
/// <summary>
/// Creates a 1x1 white texture
/// </summary>
internal GlTexture(OpenGLRenderer renderer, bool loaded)
: base("default_white", loaded)
{
_renderer = renderer;
// create a 1x1 white pixel
_pixels = new byte[] { 255, 255, 255, 255 };
_width = 1;
_height = 1;
convertToOpenGlTexture(false, true, true);
}
public GlUpdatableTexture(OpenGLRenderer renderer, string name, int width, int height)
: base(name, width, height)
{
if (Gk3Main.Utils.IsPowerOfTwo(width) == false ||
Gk3Main.Utils.IsPowerOfTwo(height) == false)
{
throw new ArgumentException("Width and height must be power-of-two");
}
_renderer = renderer;
GL.Enable(EnableCap.Texture2D);
GL.GenTextures(1, out _glTexture);
GL.BindTexture(TextureTarget.Texture2D, _glTexture);
//GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
// GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMaxLevel, 0);
}
internal GlTexture(OpenGLRenderer renderer, string name, int glTexture, int width, int height, bool loaded)
: base(name, loaded)
{
_renderer = renderer;
_glTexture = glTexture;
_width = width;
_height = height;
_actualPixelWidth = width;
_actualPixelHeight = height;
_actualWidth = 1.0f;
_actualHeight = 1.0f;
_pixels = new byte[_width * _height * 4];
GL.BindTexture(TextureTarget.Texture2D, _glTexture);
GL.GetTexImage(TextureTarget.Texture2D, 0, PixelFormat.Rgba, PixelType.UnsignedByte, _pixels);
//Gl.glTexImage2D(TextureTarget.Texture2D, 0, Gl.GL_RGBA, width, height, 0, Gl.GL_RGBA, Gl.GL_UNSIGNED_BYTE, _pixels);
}
public GlCubeMap(OpenGLRenderer renderer, string name, BitmapSurface front, BitmapSurface back, BitmapSurface left, BitmapSurface right,
BitmapSurface up, BitmapSurface down)
: base(name)
{
_renderer = renderer;
GL.GetError();
GL.GenTextures(1, out _glTexture);
GL.BindTexture(TextureTarget.TextureCubeMap, _glTexture);
const PixelFormat format = PixelFormat.Rgba;
GL.TexImage2D(TextureTarget.TextureCubeMapPositiveX, 0, PixelInternalFormat.Rgba, front.Width, front.Height, 0, format, PixelType.UnsignedByte, front.Pixels);
GL.TexImage2D(TextureTarget.TextureCubeMapNegativeX, 0, PixelInternalFormat.Rgba, back.Width, back.Height, 0, format, PixelType.UnsignedByte, back.Pixels);
GL.TexImage2D(TextureTarget.TextureCubeMapPositiveZ, 0, PixelInternalFormat.Rgba, right.Width, right.Height, 0, format, PixelType.UnsignedByte, right.Pixels);
GL.TexImage2D(TextureTarget.TextureCubeMapNegativeZ, 0, PixelInternalFormat.Rgba, left.Width, left.Height, 0, format, PixelType.UnsignedByte, left.Pixels);
GL.TexImage2D(TextureTarget.TextureCubeMapPositiveY, 0, PixelInternalFormat.Rgba, up.Width, up.Height, 0, format, PixelType.UnsignedByte, up.Pixels);
if (down != null)
{
GL.TexImage2D(TextureTarget.TextureCubeMapNegativeY, 0, PixelInternalFormat.Rgba, down.Width, down.Height, 0, format, PixelType.UnsignedByte, down.Pixels);
}
else
{
// apparently the "down" face isn't needed. we'll just reuse the top.
GL.TexImage2D(TextureTarget.TextureCubeMapNegativeY, 0, PixelInternalFormat.Rgba, up.Width, up.Height, 0, format, PixelType.UnsignedByte, up.Pixels);
}
GL.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
if (GL.GetError() != ErrorCode.NoError)
{
throw new InvalidOperationException();
}
}