private void GenerateTextures(Dictionary <Bitmap, IEnumerable <GlyphInfo> > glyphData)
{
var imageSettings = new GorgonImageInfo(ImageType.Image2D, BufferFormat.R8G8B8A8_UNorm)
{
Width = Info.TextureWidth,
Height = Info.TextureHeight,
Depth = 1
};
var textureSettings = new GorgonTexture2DInfo
{
Format = BufferFormat.R8G8B8A8_UNorm,
Width = Info.TextureWidth,
Height = Info.TextureHeight,
Usage = ResourceUsage.Default,
Binding = TextureBinding.ShaderResource,
IsCubeMap = false,
MipLevels = 1,
MultisampleInfo = GorgonMultisampleInfo.NoMultiSampling
};
GorgonImage image = null;
GorgonTexture2D texture = null;
int arrayIndex = 0;
int bitmapCount = glyphData.Count;
try
{
// We copy each bitmap into a texture array index until we've hit the max texture array size, and then
// we move to a new texture. This will keep our glyph textures inside of a single texture object until
// it is absolutely necessary to change and should improve performance when rendering.
foreach (KeyValuePair <Bitmap, IEnumerable <GlyphInfo> > glyphBitmap in glyphData)
{
if ((image == null) || (arrayIndex >= Graphics.VideoAdapter.MaxTextureArrayCount))
{
textureSettings.ArrayCount = imageSettings.ArrayCount = bitmapCount.Min(Graphics.VideoAdapter.MaxTextureArrayCount);
arrayIndex = 0;
image?.Dispose();
image = new GorgonImage(imageSettings);
texture = image.ToTexture2D(Graphics, new GorgonTexture2DLoadOptions
{
Name = $"GorgonFont_{Name}_Internal_Texture_{Guid.NewGuid():N}"
});
_internalTextures.Add(texture);
}
CopyBitmap(glyphBitmap.Key, image, arrayIndex);
// Send to our texture.
texture.SetData(image.Buffers[0, arrayIndex], destArrayIndex: arrayIndex);
foreach (GlyphInfo info in glyphBitmap.Value)
{
info.Texture = texture;
info.TextureArrayIndex = arrayIndex;
}
bitmapCount--;
arrayIndex++;
}
}
finally
{
image?.Dispose();
}
}