/// <summary>
/// Allocates texture storage. Does not bind the texture to the specified target, it needs to be bound by the user in advance.
/// </summary>
/// <param name="format">The internal format of the texture data</param>
/// <param name="width">Texture image width</param>
/// <param name="height">Texture image height</param>
/// <param name="levels">The number of levels. Use 0 to automatically compute level count.</param>
protected void TexStorage2D(SizedInternalFormatGlob format, int width, int height, int levels = 0)
{
if (levels < 1)
{
levels = CountLevels(width, height);
}
GL.TexStorage2D((TextureTarget2d)Target, levels, (SizedInternalFormat)format, width, height);
OnTextureStorage(format, levels, 1, width, height);
}
void OnTextureStorage(SizedInternalFormatGlob format, int levels, int samples, int width, int height = 0, int depth = 0)
{
Format = format;
Levels = levels;
Samples = samples;
StorageWidth = width;
StorageHeight = height;
StorageDepth = depth;
ViewBase = null;
ViewMinLevel = -1;
ViewNumLevels = -1;
ViewMinLayer = -1;
ViewNumLayers = -1;
Utils.SetObjectLabel(ObjectLabelIdentifier.Texture, Handle, Name);
}
// TODO: test texture views
/// <summary>
/// Important: do not assign a TextureTarget to the texture before calling TextureView // TODO: proč?
/// </summary>
/// <param name="origTexture"></param>
/// <param name="format"></param>
/// <param name="minLevel"></param>
/// <param name="numLevels"></param>
/// <param name="minLayer"></param>
/// <param name="numLayers"></param>
protected void TextureView(Texture origTexture, SizedInternalFormatGlob format, int minLevel, int numLevels,
int minLayer, int numLayers)
{
GL.TextureView(Handle, Target, origTexture.Handle, (PixelInternalFormat)format, minLevel, numLevels, minLayer, numLayers);
Format = format;
Levels = numLevels;
Samples = origTexture.Samples;
StorageWidth = origTexture.StorageWidth >> minLevel;
StorageHeight = origTexture.StorageHeight >> minLevel;
StorageDepth = origTexture.StorageDepth >> minLevel;
ViewBase = origTexture;
ViewMinLevel = minLevel;
ViewNumLevels = numLevels;
ViewMinLayer = minLayer;
ViewNumLayers = numLayers;
}
/// <summary>
/// Allocates multisample texture storage. Does not bind the texture to the specified target, it needs to be bound by the user in advance.
/// </summary>
/// <param name="format">The internal format of the texture data</param>
/// <param name="samples">The sample count of each texture texel</param>
/// <param name="width">Texture image width</param>
/// <param name="height">Texture image height</param>
/// <param name="depth">Texture image depth</param>
protected void TexStorage3DMultisample(SizedInternalFormatGlob format, int samples, int width, int height, int depth, bool fixedLocations)
{
GL.TexStorage3DMultisample((TextureTargetMultisample3d)Target, samples, (SizedInternalFormat)format, width, height, depth, fixedLocations);
OnTextureStorage(format, 1, samples, width, height, depth);
}
// TODO: texture views
public Texture2D(Device device, string name, SizedInternalFormatGlob format, Texture origTexture, int minLevel, int numLevels, int minLayer = 0)
: base(TextureTarget.Texture2D, name)
{
// Texture view - no need to bind
TextureView(origTexture, format, minLevel, numLevels, minLayer, 1);
}
// TODO
/// <summary>
/// Creates a Texture2D using immutable storage.
/// </summary>
/// <param name="device">Glob device</param>
/// <param name="name">Debug label</param>
/// <param name="format">Texture internal format</param>
/// <param name="width">Width in texels</param>
/// <param name="height">Height in texels</param>
/// <param name="levels">Number of mip level. Special values: 1 for the base level only, 0 to compute number of mip levels automatically from texture dimensions.</param>
public Texture2D(Device device, string name, SizedInternalFormatGlob format, int width, int height, int levels = 0)
: base(TextureTarget.Texture2D, name)
{
device.BindTexture(Target, Handle);
TexStorage2D(format, width, height, levels);
}
public Texture3D(Device device, string name, SizedInternalFormatGlob format, Texture origTexture, int minLevel, int numLevels, int minLayer = 0, int numLayers = 1)
: base(TextureTarget.Texture3D, name)
{
//state.TextureUnit.BindTexture(Target, Handle);
TextureView(origTexture, format, minLevel, numLevels, minLayer, numLayers);
}
