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package d3d12_backend
import d3d12 "vendor:directx/d3d12"
import dxgi "vendor:directx/dxgi"
import bk ".."
// --- Format conversion ---
@(private)
to_dxgi_format :: proc(fmt: bk.Format) -> dxgi.FORMAT {
switch fmt {
case .Undefined:
return .UNKNOWN
case .R8G8B8A8_SRGB:
return .R8G8B8A8_UNORM_SRGB
case .R8G8B8A8_UNORM:
return .R8G8B8A8_UNORM
case .B8G8R8A8_SRGB:
return .B8G8R8A8_UNORM_SRGB
case .D32_SFLOAT:
return .D32_FLOAT
case .D32_SFLOAT_S8_UINT:
return .D32_FLOAT_S8X24_UINT
case .D24_UNORM_S8_UINT:
return .D24_UNORM_S8_UINT
}
return .UNKNOWN
}
@(private)
from_dxgi_format :: proc(fmt: dxgi.FORMAT) -> bk.Format {
#partial switch fmt {
case .R8G8B8A8_UNORM_SRGB:
return .R8G8B8A8_SRGB
case .R8G8B8A8_UNORM:
return .R8G8B8A8_UNORM
case .B8G8R8A8_UNORM_SRGB:
return .B8G8R8A8_SRGB
case .D32_FLOAT:
return .D32_SFLOAT
case .D32_FLOAT_S8X24_UINT:
return .D32_SFLOAT_S8_UINT
case .D24_UNORM_S8_UINT:
return .D24_UNORM_S8_UINT
case:
return .Undefined
}
}
// --- Topology conversion (PSO type) ---
@(private)
to_d3d12_topology_type :: proc(t: bk.Topology) -> d3d12.PRIMITIVE_TOPOLOGY_TYPE {
switch t {
case .Triangle_List, .Triangle_Strip:
return .TRIANGLE
case .Line_List:
return .LINE
case .Point_List:
return .POINT
}
return .TRIANGLE
}
// --- Topology conversion (draw-time) ---
@(private)
to_d3d12_topology :: proc(t: bk.Topology) -> d3d12.PRIMITIVE_TOPOLOGY {
switch t {
case .Triangle_List:
return .TRIANGLELIST
case .Triangle_Strip:
return .TRIANGLESTRIP
case .Line_List:
return .LINELIST
case .Point_List:
return .POINTLIST
}
return .TRIANGLELIST
}
// --- Cull mode conversion ---
@(private)
to_d3d12_cull_mode :: proc(c: bk.Cull_Mode) -> d3d12.CULL_MODE {
switch c {
case .None:
return .NONE
case .Front:
return .FRONT
case .Back:
return .BACK
case .Front_And_Back:
return .BACK
}
return .NONE
}
// --- Filter conversion ---
@(private)
to_d3d12_filter :: proc(mag, min, mip: bk.Filter) -> d3d12.FILTER {
mag_linear := mag == .Linear
min_linear := min == .Linear
mip_linear := mip == .Linear
if mag_linear && min_linear && mip_linear {
return .MIN_MAG_MIP_LINEAR
} else if mag_linear && min_linear && !mip_linear {
return .MIN_MAG_LINEAR_MIP_POINT
} else if !mag_linear && !min_linear && !mip_linear {
return .MIN_MAG_MIP_POINT
} else if !mag_linear && !min_linear && mip_linear {
return .MIN_MAG_POINT_MIP_LINEAR
} else if mag_linear && !min_linear {
return .MIN_POINT_MAG_LINEAR_MIP_POINT
} else if !mag_linear && min_linear {
return .MIN_LINEAR_MAG_MIP_POINT
}
return .MIN_MAG_MIP_LINEAR
}
// --- Address mode conversion ---
@(private)
to_d3d12_address_mode :: proc(m: bk.Address_Mode) -> d3d12.TEXTURE_ADDRESS_MODE {
switch m {
case .Repeat:
return .WRAP
case .Clamp_To_Edge:
return .CLAMP
case .Clamp_To_Border:
return .BORDER
}
return .WRAP
}
// --- Compare op conversion ---
@(private)
to_d3d12_compare_func :: proc(op: bk.Compare_Op) -> d3d12.COMPARISON_FUNC {
switch op {
case .Never:
return .NEVER
case .Less:
return .LESS
case .Less_Or_Equal:
return .LESS_EQUAL
case .Equal:
return .EQUAL
case .Greater_Or_Equal:
return .GREATER_EQUAL
case .Greater:
return .GREATER
case .Not_Equal:
return .NOT_EQUAL
case .Always:
return .ALWAYS
}
return .ALWAYS
}
@(private)
to_d3d12_stencil_op :: proc(op: bk.Stencil_Op) -> d3d12.STENCIL_OP {
switch op {
case .Keep:
return .KEEP
case .Zero:
return .ZERO
case .Replace:
return .REPLACE
case .Increment_Clamp:
return .INCR_SAT
case .Decrement_Clamp:
return .DECR_SAT
case .Invert:
return .INVERT
}
return .KEEP
}
@(private)
to_d3d12_stencil_face :: proc(face: bk.Stencil_Face_State) -> d3d12.DEPTH_STENCILOP_DESC {
return {
StencilFailOp = to_d3d12_stencil_op(face.fail_op),
StencilDepthFailOp = to_d3d12_stencil_op(face.depth_fail_op),
StencilPassOp = to_d3d12_stencil_op(face.pass_op),
StencilFunc = to_d3d12_compare_func(face.compare_op),
}
}
// --- Vertex format conversion ---
@(private)
to_dxgi_vertex_format :: proc(fmt: bk.Vertex_Format) -> dxgi.FORMAT {
switch fmt {
case .Float2:
return .R32G32_FLOAT
case .Float3:
return .R32G32B32_FLOAT
case .Float4:
return .R32G32B32A32_FLOAT
}
return .UNKNOWN
}
// --- Helpers ---
@(private)
format_pixel_size :: proc(fmt: bk.Format) -> u32 {
switch fmt {
case .R8G8B8A8_SRGB, .R8G8B8A8_UNORM, .B8G8R8A8_SRGB:
return 4
case .D32_SFLOAT:
return 4
case .D32_SFLOAT_S8_UINT:
return 8
case .D24_UNORM_S8_UINT:
return 4
case .Undefined:
return 0
}
return 0
}
@(private)
depth_format_to_typeless :: proc(fmt: dxgi.FORMAT) -> dxgi.FORMAT {
#partial switch fmt {
case .D32_FLOAT:
return .R32_TYPELESS
case .D32_FLOAT_S8X24_UINT:
return .R32G8X24_TYPELESS
case .D24_UNORM_S8_UINT:
return .R24G8_TYPELESS
case:
return fmt
}
}
@(private)
depth_format_to_srv :: proc(fmt: dxgi.FORMAT) -> dxgi.FORMAT {
#partial switch fmt {
case .D32_FLOAT:
return .R32_FLOAT
case .D32_FLOAT_S8X24_UINT:
return .R32_FLOAT_X8X24_TYPELESS
case .D24_UNORM_S8_UINT:
return .R24_UNORM_X8_TYPELESS
case:
return fmt
}
}