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https://github.com/scratchfoundation/bgfx.git
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2819f93f26
The D3D11 shader compiler doesn't remove unused constants because it would change the size of buffers uploaded by the application. This means that all of the default unused bgfx uniforms take up a huge amount of space that forces the app to waste a ton of time uploading zeroes. This change is a bit of a hack but removes the unused constants and improves performance a great deal.
147 lines
3 KiB
C++
147 lines
3 KiB
C++
/*
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* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#ifndef SHADERC_H_HEADER_GUARD
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#define SHADERC_H_HEADER_GUARD
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#define _BX_TRACE(_format, ...) \
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BX_MACRO_BLOCK_BEGIN \
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if (g_verbose) \
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{ \
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fprintf(stderr, BX_FILE_LINE_LITERAL "" _format "\n", ##__VA_ARGS__); \
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} \
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BX_MACRO_BLOCK_END
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#define _BX_WARN(_condition, _format, ...) \
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BX_MACRO_BLOCK_BEGIN \
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if (!(_condition) ) \
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{ \
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BX_TRACE("WARN " _format, ##__VA_ARGS__); \
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} \
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BX_MACRO_BLOCK_END
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#define _BX_CHECK(_condition, _format, ...) \
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BX_MACRO_BLOCK_BEGIN \
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if (!(_condition) ) \
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{ \
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BX_TRACE("CHECK " _format, ##__VA_ARGS__); \
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bx::debugBreak(); \
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} \
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BX_MACRO_BLOCK_END
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#define BX_TRACE _BX_TRACE
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#define BX_WARN _BX_WARN
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#define BX_CHECK _BX_CHECK
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#ifndef SHADERC_CONFIG_HLSL
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# define SHADERC_CONFIG_HLSL BX_PLATFORM_WINDOWS
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#endif // SHADERC_CONFIG_HLSL
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extern bool g_verbose;
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#include <alloca.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <algorithm>
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#include <string>
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#include <vector>
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#include <unordered_map>
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#include <bx/bx.h>
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#include <bx/debug.h>
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#include <bx/commandline.h>
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#include <bx/endian.h>
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#include <bx/uint32_t.h>
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#include <bx/readerwriter.h>
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#include <bx/string.h>
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#include <bx/hash.h>
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#include "../../src/vertexdecl.h"
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class LineReader
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{
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public:
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LineReader(const char* _str)
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: m_str(_str)
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, m_pos(0)
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, m_size((uint32_t)strlen(_str))
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{
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}
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std::string getLine()
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{
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const char* str = &m_str[m_pos];
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skipLine();
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const char* eol = &m_str[m_pos];
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std::string tmp;
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tmp.assign(str, eol - str);
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return tmp;
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}
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bool isEof() const
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{
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return m_str[m_pos] == '\0';
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}
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void skipLine()
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{
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const char* str = &m_str[m_pos];
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const char* nl = bx::strnl(str);
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m_pos += (uint32_t)(nl - str);
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}
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const char* m_str;
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uint32_t m_pos;
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uint32_t m_size;
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};
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struct UniformType
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{
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enum Enum
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{
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Uniform1i,
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Uniform1f,
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End,
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Uniform1iv,
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Uniform1fv,
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Uniform2fv,
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Uniform3fv,
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Uniform4fv,
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Uniform3x3fv,
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Uniform4x4fv,
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Count
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};
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};
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#define BGFX_UNIFORM_FRAGMENTBIT UINT8_C(0x10)
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const char* getUniformTypeName(UniformType::Enum _enum);
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UniformType::Enum nameToUniformTypeEnum(const char* _name);
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struct Uniform
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{
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std::string name;
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UniformType::Enum type;
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uint8_t num;
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uint16_t regIndex;
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uint16_t regCount;
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};
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typedef std::vector<Uniform> UniformArray;
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void printCode(const char* _code, int32_t _line = 0, int32_t _start = 0, int32_t _end = INT32_MAX);
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void strreplace(char* _str, const char* _find, const char* _replace);
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int32_t writef(bx::WriterI* _writer, const char* _format, ...);
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void writeFile(const char* _filePath, const void* _data, int32_t _size);
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bool compileHLSLShader(bx::CommandLine& _cmdLine, uint32_t _d3d, const std::string& _code, bx::WriterI* _writer, bool firstPass = true);
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bool compileGLSLShader(bx::CommandLine& _cmdLine, uint32_t _gles, const std::string& _code, bx::WriterI* _writer);
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#endif // SHADERC_H_HEADER_GUARD
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