protected override void Create()
{
// Not needed on newer OpenGL
if (!GlHelper.HasExtension("GL_ARB_texture_non_power_of_two"))
{
if (!IsPowerOf2(width) || !IsPowerOf2(height))
{
throw new Exception("Texture size must be power of 2");
}
}
GlUtil.Assert("before creating texture");
CreateTexture();
try {
gl.BindTexture(gl.TEXTURE_2D, Handle);
gl.TexImage2D(gl.TEXTURE_2D, 0, (int)gl.RGBA,
(int)width, (int)height, 0, (pixbuf.HasAlpha ? gl.RGBA : gl.RGB),
gl.UNSIGNED_BYTE, pixbuf.Pixels);
GlUtil.Assert("creating texture (too big?)");
SetTextureParams();
this.pixbuf = null; //gc can take it now
} catch (Exception) {
uint[] handles = { Handle };
gl.DeleteTextures(1, handles);
throw;
}
}
protected virtual void Create()
{
LogManager.Log(LogLevel.Debug, "Texture.Create()");
// Not needed on newer OpenGL
if (!GlHelper.HasExtension("GL_ARB_texture_non_power_of_two"))
{
if (!IsPowerOf2(width) || !IsPowerOf2(height))
{
throw new Exception("Texture size must be power of 2");
}
}
GlUtil.Assert("before creating texture");
CreateTexture();
try {
gl.BindTexture(gl.TEXTURE_2D, Handle);
gl.TexImage2D(gl.TEXTURE_2D, 0, (int)glformat,
(int)width, (int)height, 0,
gl.RGBA, gl.UNSIGNED_BYTE, IntPtr.Zero);
GlUtil.Assert("creating texture (too big?)");
SetTextureParams();
} catch (Exception) {
uint[] handles = { Handle };
gl.DeleteTextures(1, handles);
throw;
}
}
public ImageTexture(Stream input)
{
Gdk.Pixbuf pixbuf = new Gdk.Pixbuf(input);
uint width = (uint)pixbuf.Width;
uint height = (uint)pixbuf.Height;
// Round to next power-of-two isn't needed with newer OpenGL versions
if (!GlHelper.HasExtension("GL_ARB_texture_non_power_of_two"))
{
width = NextPowerOfTwo((uint)width);
height = NextPowerOfTwo((uint)height);
}
Gdk.Pixbuf target = new Gdk.Pixbuf(Gdk.Colorspace.Rgb, true, 8, (int)width, (int)height);
pixbuf.CopyArea(0, 0, pixbuf.Width, pixbuf.Height, target, 0, 0);
ImageWidth = (float)pixbuf.Width;
ImageHeight = (float)pixbuf.Height;
this.width = (uint)target.Width;
this.height = (uint)target.Height;
this.pixbuf = target;
}
