protected override void createInternalResources()
{
//Conver to nearest power of two size if require
this.width = GLES2PixelUtil.OptionalPO2(Width);
this.height = GLES2PixelUtil.OptionalPO2(Height);
this.depth = GLES2PixelUtil.OptionalPO2(Depth);
//Adjust format if required
format = TextureManager.Instance.GetNativeFormat(textureType, Format, usage);
//Check requested number of mipmaps
int maxMips = GLES2PixelUtil.GetMaxMipmaps(this.width, this.height, this.depth, format);
if (PixelUtil.IsCompressed(format) && (mipmapCount == 0))
{
requestedMipmapCount = 0;
}
mipmapCount = requestedMipmapCount;
if (mipmapCount > maxMips)
{
mipmapCount = maxMips;
}
//Generate texture name
GL.GenTextures(1, ref this.textureID);
GLES2Config.GlCheckError(this);
//Set texture name
GL.BindTexture(this.GLES2TextureTarget, this.textureID);
GLES2Config.GlCheckError(this);
//Set some misc default parameters, tehse can of course be changed later
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureMinFilter, (int)GLenum.Nearest);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureMagFilter, (int)GLenum.Nearest);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureWrapS, (int)GLenum.ClampToEdge);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureWrapT, (int)GLenum.ClampToEdge);
GLES2Config.GlCheckError(this);
//If we can do automip generation and the user desires this, do so
mipmapsHardwareGenerated = Root.Instance.RenderSystem.Capabilities.HasCapability(Capabilities.HardwareMipMaps) && !PixelUtil.IsCompressed(format);
//Ogre FIXME: For some reason this is crashing on iOS 5
#if !MONOTOUCH && ANDROID
if ((usage & TextureUsage.AutoMipMap) == TextureUsage.AutoMipMap && requestedMipmapCount > 0 && mipmapsHardwareGenerated && (textureType != Graphics.TextureType.CubeMap))
{
GL.GenerateMipmap(this.GLES2TextureTarget);
GLES2Config.GlCheckError(this);
}
#endif
//Allocate internal buffer so that glTexSubImageXD can be used
//INternal format
GLenum glformat = GLES2PixelUtil.GetClosestGLInternalFormat(format, hwGamma);
GLenum dataType = GLES2PixelUtil.GetGLOriginDataType(format);
int width = Width;
int height = Height;
int depth = Depth;
if (PixelUtil.IsCompressed(format))
{
//Compressed formats
int size = PixelUtil.GetMemorySize(Width, Height, Depth, Format);
// Provide temporary buffer filled with zeroes as glCompressedTexImageXD does not
// accept a 0 pointer like normal glTexImageXD
// Run through this process for every mipmap to pregenerate mipmap pyramid
var tmpData = new IntPtr();
for (int mip = 0; mip < mipmapCount; mip++)
{
size = PixelUtil.GetMemorySize(width, height, depth, Format);
switch (textureType)
{
case TextureType.OneD:
case TextureType.TwoD:
GL.CompressedTexImage2D(GLenum.Texture2D, mip, glformat, width, height, 0, size, tmpData);
GLES2Config.GlCheckError(this);
break;
case TextureType.CubeMap:
for (int face = 0; face < 6; face++)
{
GL.CompressedTexImage2D((GLenum)((int)GLenum.TextureCubeMapPositiveX + face), mip, glformat, width, height, 0, size, tmpData);
GLES2Config.GlCheckError(this);
}
break;
case TextureType.ThreeD:
break;
default:
break;
}
if (width > 1)
{
width = width / 2;
}
if (height > 1)
{
height = height / 2;
}
if (depth > 1)
{
depth = depth / 2;
}
}
tmpData = IntPtr.Zero;
}
else
{
//Run through this process to pregenerate mipmap pyramid
for (int mip = 0; mip < mipmapCount; mip++)
{
//Normal formats
switch (textureType)
{
case TextureType.OneD:
case TextureType.TwoD:
GL.TexImage2D(GLenum.Texture2D, mip, (int)glformat, width, height, 0, glformat, dataType, new IntPtr());
GLES2Config.GlCheckError(this);
break;
case TextureType.CubeMap:
for (int face = 0; face < 6; face++)
{
GL.TexImage2D(GLenum.TextureCubeMapPositiveX + face, mip, (int)glformat, width, height, 0, glformat, dataType, new IntPtr());
GLES2Config.GlCheckError(this);
}
break;
case TextureType.ThreeD:
default:
break;
}
if (width > 1)
{
width /= 2;
}
if (height > 1)
{
height /= 2;
}
}
}
this.CreateSurfaceList();
//Get final internal format
base.format = this.GetBuffer(0, 0).Format;
}