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// d3d-util.h
#pragma once
#include <stdint.h>
#include "../../slang-com-helper.h"
#include "../../slang-com-ptr.h"
#include "../../source/core/list.h"
#include "render.h"
#include <D3Dcommon.h>
#include <DXGIFormat.h>
namespace gfx {
class D3DUtil
{
public:
enum UsageType
{
USAGE_UNKNOWN, ///< Generally used to mark an error
USAGE_TARGET, ///< Format should be used when written as target
USAGE_DEPTH_STENCIL, ///< Format should be used when written as depth stencil
USAGE_SRV, ///< Format if being read as srv
USAGE_COUNT_OF,
};
enum UsageFlag
{
USAGE_FLAG_MULTI_SAMPLE = 0x1, ///< If set will be used form multi sampling (such as MSAA)
USAGE_FLAG_SRV = 0x2, ///< If set means will be used as a shader resource view (SRV)
};
/// Get primitive topology as D3D primitive topology
static D3D_PRIMITIVE_TOPOLOGY getPrimitiveTopology(PrimitiveTopology prim);
/// Calculate size taking into account alignment. Alignment must be a power of 2
static UInt calcAligned(UInt size, UInt alignment) { return (size + alignment - 1) & ~(alignment - 1); }
/// Compile HLSL code to DXBC
static Slang::Result compileHLSLShader(char const* sourcePath, char const* source, char const* entryPointName, char const* dxProfileName, Slang::ComPtr<ID3DBlob>& shaderBlobOut);
/// Given a slang pixel format returns the equivalent DXGI_ pixel format. If the format is not known, will return DXGI_FORMAT_UNKNOWN
static DXGI_FORMAT getMapFormat(Format format);
/// Given the usage, flags, and format will return the most suitable format. Will return DXGI_UNKNOWN if combination is not possible
static DXGI_FORMAT calcFormat(UsageType usage, DXGI_FORMAT format);
/// Calculate appropriate format for creating a buffer for usage and flags
static DXGI_FORMAT calcResourceFormat(UsageType usage, Int usageFlags, DXGI_FORMAT format);
/// True if the type is 'typeless'
static bool isTypeless(DXGI_FORMAT format);
/// Returns number of bits used for color channel for format (for channels with multiple sizes, returns smallest ie RGB565 -> 5)
static Int getNumColorChannelBits(DXGI_FORMAT fmt);
/// Append text in in, into wide char array
static void appendWideChars(const char* in, Slang::List<wchar_t>& out);
};
} // renderer_test
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