static void ExtractShaderStages(CompiledShader compiled, out CompiledShader compiledVertex, out CompiledShader compiledFragment)
{
using (var stream = new MemoryStream(compiled.shader.outputCode))
{
BinaryFormatter bin = new BinaryFormatter();
ShaderSetHeader shaderHeader = (ShaderSetHeader)bin.Deserialize(stream);
var headerVertex = shaderHeader.shaders[(int)VKShaderType.kVKShaderVertex];
if (headerVertex.offsetBytes == 0 || headerVertex.size == 0)
{
}
}
compiledVertex = new CompiledShader();
compiledVertex.Init();
compiledVertex.attributes = compiled.attributes;
//compiledVertex.constantBuffers = compiled.constantBuffers;
compiledVertex.shader = new Shader { /*outputCode = Encoding.UTF8.GetBytes(vertSrc)*/
};
compiledFragment = new CompiledShader();
compiledFragment.Init();
//compiledFragment.constantBuffers = compiled.constantBuffers;
compiledFragment.shader = new Shader { /*outputCode = Encoding.UTF8.GetBytes(fragSrc)*/
};
}
// TODO can determine which uniform buffers are used in which stage based on binding index (see 'Create' in GpuProgramsVk.cpp)
// if (binding.GetShaderStageFlags() != VK_SHADER_STAGE_FRAGMENT_BIT) // *only* used in fragment shader
static uint SerializeUniforms(CompiledShader compiled, BinaryWriter writer)
{
int totalConstants = 0;
foreach (var constantBuffer in compiled.constantBuffers)
{
totalConstants += constantBuffer.usedConstants;
}
writer.Write((ushort)totalConstants);
int size = 0;
foreach (var constantBuffer in compiled.constantBuffers)
{
for (int i = 0; i < constantBuffer.usedConstants; i++)
{
var constant = constantBuffer.constants[i];
UnityToBgfx.ConvertBuiltInUniform(constant.name, out string uniformName);
writer.Write((byte)uniformName.Length);
writer.Write(Encoding.UTF8.GetBytes(uniformName));
if (constant.dataType != UnityHelper.ShaderParamType.kShaderParamFloat)
{
throw new NotSupportedException("Only float types are supported for uniforms.");
}
// Data type
var type = UnityToBgfx.GetBgfxUniformDataType(constant);
writer.Write((byte)type); // TODO bx::write(_writer, uint8_t(un.type | fragmentBit));
// array size
writer.Write((byte)constant.arraySize); // Should be 0 if not an array
// regIndex - bgfx puts all constants into a single buffer
writer.Write((ushort)(size + constant.idx)); // TODO
// regCount
var regCount = constant.arraySize;
if (type == BgfxHelper.UniformType.Mat3)
{
regCount *= 3;
}
else if (type == BgfxHelper.UniformType.Mat4)
{
regCount *= 4;
}
writer.Write((ushort)regCount);
// TODO this is only used in renderer_webgpu.cpp?
// texComponent
// texDimension
// writer.Write((byte)0);
// writer.Write((byte)0);
}
size += constantBuffer.size;
}
return((uint)size);
}
internal static byte[] CreateSerializedBgfxShader(CompiledShader compiled, Stage stage)
{
// TODO SMOL-V compression and shader stage extraction
throw new NotImplementedException();
#if false
// Export bgfx file
bool isVertexShader = stage == Stage.Vertex;
using (var ms = new MemoryStream())
using (var bw = new BinaryWriter(ms))
{
// Header
bw.Write(isVertexShader ? BgfxHelper.BGFX_CHUNK_MAGIC_VSH : BgfxHelper.BGFX_CHUNK_MAGIC_FSH);
// Input/output hashes used for validating that vertex output matches fragment input
bw.Write(0u);
bw.Write(0u);
uint uniformBufferSize = SerializeUniforms(compiled, bw);
bw.Write((uint)compiled.shader.outputCode.Length);
bw.Write(compiled.shader.outputCode);
byte nul = 0;
bw.Write(nul);
// vertex attributes
if (isVertexShader)
{
bw.Write((byte)compiled.inputs.Count);
foreach (var input in compiled.inputs)
{
BgfxHelper.Attrib attrib = UnityToBgfx.ConvertAttribute(input.src);
if (attrib != BgfxHelper.Attrib.Count)
{
bw.Write(BgfxHelper.s_attribToId[attrib]);
}
else
{
bw.Write(ushort.MaxValue);
}
}
}
else
{
bw.Write((byte)0);
}
// constant buffer size
bw.Write(uniformBufferSize);
return(ms.ToArray());
}
#endif
}