1 files changed, 185 insertions, 0 deletions
diff --git a/Runtime/GfxDevice/d3d11/InternalShaders/CompileShaderLib/CompileShaderLib.cpp b/Runtime/GfxDevice/d3d11/InternalShaders/CompileShaderLib/CompileShaderLib.cpp
new file mode 100644
index 0000000..f25090b
--- /dev/null
+++ b/Runtime/GfxDevice/d3d11/InternalShaders/CompileShaderLib/CompileShaderLib.cpp
@@ -0,0 +1,185 @@
+// This is a small program to precompile hlsl library to a header file,
+// used only for fixed function shader generation with d3d11 linker. 
+// It also generates 8 * 4 combinations of texture sampling functions.
+//
+// Useful because fxc doesn't support lib_* targets,
+// but once it does it's probably a good idea to deprecate this.
+
+#include <windows.h>
+#include <d3d11.h>
+#include <d3dcommon.h>
+#include <d3dcompiler.h>
+
+#include <cstdio>
+#include <cassert>
+
+typedef HRESULT (WINAPI *D3DCompileFunc)(
+	const void* pSrcData,
+	unsigned long SrcDataSize,
+	const char* pFileName,
+	const D3D10_SHADER_MACRO* pDefines,
+	void* pInclude,
+	const char* pEntrypoint,
+	const char* pTarget,
+	unsigned int Flags1,
+	unsigned int Flags2,
+	ID3DBlob** ppCode,
+	ID3DBlob** ppErrorMsgs
+);
+
+const char* dllName = "D3DCompiler_47.dll";
+
+const char* readFile(const char* path)
+{
+	FILE* f = fopen(path, "rb");
+	if (!f)
+		return NULL;
+
+	fseek(f, 0, SEEK_END);
+	size_t s = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	char* out = (char*)malloc(s+1);
+	fread(out, s, 1, f);
+	out[s] = '\0';
+	fclose(f);
+	return out;
+}
+
+void printCompiledShader(ID3DBlob* shader, const char* name, FILE* out)
+{
+	const unsigned char* data = (const unsigned char*)shader->GetBufferPointer();
+	size_t size = (size_t)shader->GetBufferSize();
+
+	fprintf(out, "const BYTE %s[] = { \n", name);
+	for(int i = 0; i < size; ++i) {
+		fprintf(out, ((i==size-1) ? "%d" : "%d,"), (int)data[i]);
+		if((i+1) % 16 == 0)
+			fprintf(out, "\n");
+	}
+	fprintf(out, "\n};\n");
+}
+
+// type: 0 - 2d, 1 - 2d proj, 2 - 3d, 3 - cube
+const char* generateTextureSamplingLib(int type, int unit)
+{
+	const int maxSize = 2048;
+	static char hlsl[maxSize];
+
+	const char* textureTypes[] = { "Texture2D", "Texture2D", "Texture3D", "TextureCube" };
+	const char* coordTypes[] = {"float2", "float4", "float3", "float3" };
+	const char* coords[] = {"uv.xy", "uv.xy/uv.w", "uv.xyz", "uv.xyz" };
+
+	sprintf(hlsl,
+		"%s<float4> Tex%d : register(t%d);\n"
+		"SamplerState Smp%d : register(s%d);\n"
+		"export float4 LoadTex%d(%s uv) { return Tex%d.Sample(Smp%d, %s); }\n",
+		textureTypes[type], unit, unit, unit, unit, unit,
+		coordTypes[type], unit, unit, coords[type]
+	);
+
+	return hlsl;
+}
+
+const char* textureSamplingLibName(int type, int unit)
+{
+	static const char* typeStr[] = {"2D", "Proj", "3D", "Cube"};
+	static char name[32];
+	sprintf(name, "g_FFSampleTex%s%d", typeStr[type], unit);
+	return name;
+}
+
+// Since we can't bind multiple textures to the same texture register,
+// we'll have to generate 4 * 8 sampling functions and link the correct ones
+// at runtime.
+void printTextureSampling(D3DCompileFunc compileFunc, FILE* out)
+{
+	// Print compiled shaders
+	for (int type = 0; type < 4; ++type)
+	{
+		for (int unit = 0; unit < 8; ++unit)
+		{
+			const char* name = textureSamplingLibName(type, unit);
+			const char* hlsl = generateTextureSamplingLib(type, unit);
+
+			ID3DBlob* errors;
+			ID3DBlob* shader;
+			HRESULT hr = compileFunc(
+				hlsl, strlen(hlsl), name, NULL, NULL, NULL,
+				"lib_4_0_level_9_1", D3DCOMPILE_OPTIMIZATION_LEVEL3, 0, &shader, &errors
+			);
+
+			assert(SUCCEEDED(hr));
+
+			printCompiledShader(shader, name, out);
+
+			shader->Release();
+		}
+	}
+
+	// Print index to all shaders
+	fprintf(out, "const BYTE* g_FFSampleTexLib[] = { \n");
+	for (int type = 0; type < 4; ++type)
+		for (int unit = 0; unit < 8; ++unit)
+			fprintf(out, "%s,\n", textureSamplingLibName(type, unit));
+	fprintf(out, "};\n");
+
+	// Print sizes of all shaders
+	fprintf(out, "const size_t g_FFSampleTexLibSize[] = { \n");
+	for (int type = 0; type < 4; ++type)
+		for (int unit = 0; unit < 8; ++unit)
+			fprintf(out, "sizeof(%s),\n", textureSamplingLibName(type, unit));
+	fprintf(out, "};\n");
+}
+
+int main(int argc, const char** argv)
+{
+	if (argc != 3)
+	{
+		printf("Usage: CompileShaderLib.exe src.hlsl out.h\n");
+		return 1;
+	}
+
+	HMODULE dll = LoadLibraryA (dllName);
+	if (!dll)
+	{
+		printf("Can't load %s\n", dllName);
+		return 1;
+	}
+
+	D3DCompileFunc compileFunc = (D3DCompileFunc) GetProcAddress(dll, "D3DCompile");
+	if (!compileFunc)
+	{
+		printf("Can't get D3DCompile function address\n");
+		return 1;
+	}
+
+	const char* hlsl = readFile(argv[1]);
+
+	ID3DBlob* errors;
+	ID3DBlob* shader;
+	HRESULT hr = compileFunc(
+		hlsl, strlen(hlsl), argv[1], NULL, NULL, NULL,
+		"lib_4_0_level_9_1", D3DCOMPILE_OPTIMIZATION_LEVEL3, 0, &shader, &errors
+	);
+
+	if (FAILED(hr))
+	{
+		printf("Failed to compile, 0x%x:\n%s\n", hr, errors ? errors->GetBufferPointer() : "");
+		return 1;
+	}
+	
+	free((void*)hlsl);
+	FILE* out = fopen(argv[2], "w");
+	
+	fprintf(out, "// File autogenerated by CompileShaderLib.exe\n");
+	
+	printCompiledShader(shader, "g_FFShaderLibrary", out);
+	shader->Release();
+
+	printTextureSampling(compileFunc, out);
+
+	fclose(out);
+
+	return 0;
+}
+