private void LoadShaders()
{
var vShader = BuiltinShaderRepository.GetBuiltinShader(typeof(VertexPositionColorTexture), ShaderStages.Vertex);
vertexShader = vShader.CreateDeviceShader(device);
var fShader = BuiltinShaderRepository.GetBuiltinShader(typeof(VertexPositionColorTexture), ShaderStages.Fragment);
fragmentShader = fShader.CreateDeviceShader(device);
}
private Shader(Type t, GraphicsDevice graphicsDevice)
{
var shaderType = t;
var shaderName = shaderType.Name;
_vertexShader = LoadShader(graphicsDevice.ResourceFactory, shaderName, ShaderStages.Vertex, "VS");
_fragmentShader =
LoadShader(graphicsDevice.ResourceFactory, shaderName, ShaderStages.Fragment, "PS");
_hash = _vertexHash + _fragmentHash;
}
//TODO: REMOVE
public ShaderTechnique(GraphicsDevice device, byte[] vert, byte[] frag, string name)
{
GraphicsDevice = device;
_assetPath = name;
//Loads a SPIR-V binary from the byte[], and attempts to use SPIR-V cross to cross compile it for other platforms if the current platform isn't Vulkan
Programs = device.veldridGraphicsDevice.ResourceFactory.CreateFromSpirv(
new ShaderDescription(ShaderStages.Vertex, vert, "main", VesselEngine.DebugMode),
new ShaderDescription(ShaderStages.Fragment, frag, "main", VesselEngine.DebugMode));
InternalVertexShader = Programs[0];
InternalFragmentShader = Programs[1];
}
/// <summary>
/// Loads the shader from the binary object
/// </summary>
/// <param name="bytes">The byte stream</param>
private void LoadFromShaderBinary(GraphicsDevice device, byte[] bytes)
{
GraphicsDevice = device;
//TODO: Read ShaderTechnique
/*
* ENCODED USING LITTLE ENDIAN
*
* ShaderTable
* {
* byte availablePrograms = A|B|C|D|E|F|G|H; //each bit in this byte represents a specific shader stage. the order of bits is the order of the following 4 longs
* ulong vertexShader; //pointer to the start of the vertex shader program
* ulong fragmentShader; //pointer to the start of the fragment shader program
* //etc, repeat for each shader stage
* }
* Shader []
* {
* int nameLength; // length in bytes of name character; size = 4b
* byte[] name; // ASCII encoded byte[] representing the name
* ulong offset; // pointer to the start of the byte[] in the file stream
* ulong length; // how long the byte[] is in bytes, used to determine when to stop reading
* }
*
* availablePrograms
*
*
*/
int pointer = 0;
byte availableProgramFlags = bytes[pointer++];
int shaderCount = 0;
//Determine which shaders are included in the binary
bool hasVertexProgram = (availableProgramFlags & (1 << 1 - 1)) != 0;
bool hasGeometryProgram = (availableProgramFlags & (1 << 2 - 1)) != 0;
bool hasTesselationControlProgram = (availableProgramFlags & (1 << 3 - 1)) != 0;
bool hasTesselationEvaluationProgram = (availableProgramFlags & (1 << 4 - 1)) != 0;
bool hasFragmentProgram = (availableProgramFlags & (1 << 5 - 1)) != 0;
bool hasComputeProgram = (availableProgramFlags & (1 << 6 - 1)) != 0;
//Count the number of shaders
if (hasVertexProgram)
{
shaderCount++;
}
if (hasGeometryProgram)
{
shaderCount++;
}
if (hasTesselationControlProgram)
{
shaderCount++;
}
if (hasTesselationEvaluationProgram)
{
shaderCount++;
}
if (hasFragmentProgram)
{
shaderCount++;
}
if (hasComputeProgram)
{
shaderCount++;
}
byte[] vertShader = new byte[] { };
byte[] fragShader = new byte[] { };
byte[] computeShader = new byte[] { };
ulong vertShaderPtr = ulong.MaxValue;
ulong fragShaderPtr = ulong.MaxValue;
ulong compShaderPtr = ulong.MaxValue;
//Determine the addresses of the shader programs included in the shader binary
if (hasVertexProgram)
{
vertShaderPtr = BinaryUtils.ReadIntFromByteArray(bytes, pointer, 8, true);
pointer += 8;
}
if (hasFragmentProgram)
{
fragShaderPtr = BinaryUtils.ReadIntFromByteArray(bytes, pointer, 8, true);
pointer += 8;
}
if (hasComputeProgram)
{
compShaderPtr = BinaryUtils.ReadIntFromByteArray(bytes, pointer, 8, true);
pointer += 8;
}
//Loads a SPIR-V binary from the byte[], and attempts to use SPIR-V cross to cross compile it for other platforms if the current platform isn't Vulkan
Programs = device.veldridGraphicsDevice.ResourceFactory.CreateFromSpirv(
new ShaderDescription(ShaderStages.Vertex, vertShader, "main", VesselEngine.DebugMode),
new ShaderDescription(ShaderStages.Fragment, fragShader, "main", VesselEngine.DebugMode));
InternalVertexShader = Programs[0];
InternalFragmentShader = Programs[1];
GraphicsPipelineDescription pipelineDescription = new GraphicsPipelineDescription();
pipelineDescription.BlendState = BlendStateDescription.SingleOverrideBlend;
pipelineDescription.DepthStencilState = new DepthStencilStateDescription(
depthTestEnabled: true,
depthWriteEnabled: true,
comparisonKind: ComparisonKind.LessEqual);
pipelineDescription.RasterizerState = new RasterizerStateDescription(
cullMode: FaceCullMode.Back,
fillMode: PolygonFillMode.Solid,
frontFace: FrontFace.Clockwise,
depthClipEnabled: true,
scissorTestEnabled: false);
pipelineDescription.PrimitiveTopology = PrimitiveTopology.TriangleStrip;
pipelineDescription.ResourceLayouts = System.Array.Empty <ResourceLayout>();
pipelineDescription.Outputs = device.veldridGraphicsDevice.SwapchainFramebuffer.OutputDescription;
pipelineDescription.ShaderSet = new ShaderSetDescription(
vertexLayouts: new VertexLayoutDescription[]
{
VertexPositionColor.VertexLayout,
},
shaders: Programs);
shaderPipeline = device.veldridGraphicsDevice.ResourceFactory.CreateGraphicsPipeline(pipelineDescription);
}
