internal CubeTexture(
IInternalTexture left,
IInternalTexture right,
IInternalTexture up,
IInternalTexture down,
IInternalTexture front,
IInternalTexture back)
{
if (left == null)
{
throw new ArgumentNullException(nameof(left));
}
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
if (up == null)
{
throw new ArgumentNullException(nameof(up));
}
if (down == null)
{
throw new ArgumentNullException(nameof(down));
}
if (front == null)
{
throw new ArgumentNullException(nameof(front));
}
if (back == null)
{
throw new ArgumentNullException(nameof(back));
}
size = left.Size;
if (right.Size != size || up.Size != size || down.Size != size || front.Size != size || back.Size != size)
{
throw new ArgumentException(
$"[{nameof(CubeTexture)}] All faces of the cube-map need to have the same size",
nameof(size));
}
Format format = left.Format;
if (right.Format != format ||
up.Format != format || down.Format != format ||
front.Format != format || back.Format != format)
{
throw new ArgumentException(
$"[{nameof(CubeTexture)}] All faces of the cube-map need to have the same format",
nameof(size));
}
faces = new IInternalTexture[6];
faces[0] = left;
faces[1] = right;
faces[2] = up;
faces[3] = down;
faces[4] = front;
faces[5] = back;
}
internal static DeviceTexture UploadTexture(
IInternalTexture texture, RenderScene scene, bool generateMipMaps = false)
{
return(UploadTexture(
texture,
scene.LogicalDevice,
scene.MemoryPool,
scene.StagingBuffer,
scene.Executor,
generateMipMaps));
}
internal static DeviceTexture UploadTexture(
IInternalTexture texture,
Device logicalDevice,
Memory.Pool memoryPool,
Memory.HostBuffer stagingBuffer,
TransientExecutor executor,
bool generateMipMaps = false)
{
if (texture == null)
{
throw new ArgumentNullException(nameof(texture));
}
if (logicalDevice == null)
{
throw new ArgumentNullException(nameof(logicalDevice));
}
if (memoryPool == null)
{
throw new ArgumentNullException(nameof(memoryPool));
}
if (stagingBuffer == null)
{
throw new ArgumentNullException(nameof(stagingBuffer));
}
if (executor == null)
{
throw new ArgumentNullException(nameof(executor));
}
int mipLevels = generateMipMaps ? CalculateMipLevels(texture.Size) : 1;
int layers = texture.IsCubeMap ? 6 : 1;
var aspects = ImageAspects.Color;
var image = CreateImage(
logicalDevice,
texture.Format,
texture.Size,
mipLevels,
//Also include 'TransferSrc' because we read from the image to generate the mip-maps
ImageUsages.TransferSrc | ImageUsages.TransferDst | ImageUsages.Sampled,
cubeMap: texture.IsCubeMap);
var memory = memoryPool.AllocateAndBind(image, Chunk.Location.Device);
//Transition the entire image (all mip-levels and layers) to 'TransferDstOptimal'
TransitionImageLayout(image, aspects,
baseMipLevel: 0, mipLevels, baseLayer: 0, layers,
oldLayout: ImageLayout.Undefined,
newLayout: ImageLayout.TransferDstOptimal,
executor: executor);
//Upload the data to mipmap 0
texture.Upload(stagingBuffer, executor, image, aspects);
//Create the other mipmap levels
Int2 prevMipSize = texture.Size;
for (int i = 1; i < mipLevels; i++)
{
Int2 curMipSize = new Int2(
prevMipSize.X > 1 ? prevMipSize.X / 2 : 1,
prevMipSize.Y > 1 ? prevMipSize.Y / 2 : 1);
//Move the previous mip-level to a transfer source layout
TransitionImageLayout(image, aspects,
baseMipLevel: i - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferDstOptimal,
newLayout: ImageLayout.TransferSrcOptimal,
executor: executor);
//Blit the previous mip-level to the current at half the size
BlitImage(aspects,
fromImage: image,
fromRegion: new IntRect(min: Int2.Zero, max: prevMipSize),
fromMipLevel: i - 1,
fromLayerCount: layers,
toImage: image,
toRegion: new IntRect(min: Int2.Zero, max: curMipSize),
toMipLevel: i,
toLayerCount: layers,
executor);
//Transition the previous mip-level to the shader-read layout
TransitionImageLayout(image, aspects,
baseMipLevel: i - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferSrcOptimal,
newLayout: ImageLayout.ShaderReadOnlyOptimal,
executor: executor);
//Update the prev mip-size
prevMipSize = curMipSize;
}
//Transition the last mip-level to the shader-read layout
TransitionImageLayout(image, aspects,
baseMipLevel: mipLevels - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferDstOptimal,
newLayout: ImageLayout.ShaderReadOnlyOptimal,
executor: executor);
var view = CreateView(
image, texture.Format, mipLevels, aspects, cubeMap: texture.IsCubeMap);
return(new DeviceTexture(
texture.Size,
texture.Format,
ImageLayout.ShaderReadOnlyOptimal, //Used for shader reading,
mipLevels,
aspects,
image,
memory,
view));
}