ddnet/src/engine/client/opengl_sl.cpp

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#include "opengl_sl.h"
#include <engine/shared/linereader.h>
#include <engine/storage.h>
#include <stdio.h>
#include <string>
#include <vector>
bool CGLSL::LoadShader(CGLSLCompiler *pCompiler, IStorage *pStorage, const char *pFile, int Type)
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{
if(m_IsLoaded)
return true;
IOHANDLE f = pStorage->OpenFile(pFile, IOFLAG_READ, IStorage::TYPE_ALL);
std::vector<std::string> Lines;
if(f)
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{
bool IsNewOpenGL = pCompiler->m_OpenGLVersionMajor >= 4 || (pCompiler->m_OpenGLVersionMajor == 3 && pCompiler->m_OpenGLVersionMinor == 3);
//add compiler specific values
if(IsNewOpenGL)
Lines.push_back(std::string("#version ") + std::string(std::to_string(pCompiler->m_OpenGLVersionMajor)) + std::string(std::to_string(pCompiler->m_OpenGLVersionMinor)) + std::string(std::to_string(pCompiler->m_OpenGLVersionPatch)) + std::string(" core\r\n"));
else
{
if(pCompiler->m_OpenGLVersionMajor == 3)
{
if(pCompiler->m_OpenGLVersionMinor == 0)
Lines.push_back(std::string("#version 130 \r\n"));
if(pCompiler->m_OpenGLVersionMinor == 1)
Lines.push_back(std::string("#version 140 \r\n"));
if(pCompiler->m_OpenGLVersionMinor == 2)
Lines.push_back(std::string("#version 150 \r\n"));
}
else if(pCompiler->m_OpenGLVersionMajor == 2)
{
if(pCompiler->m_OpenGLVersionMinor == 0)
Lines.push_back(std::string("#version 110 \r\n"));
if(pCompiler->m_OpenGLVersionMinor == 1)
Lines.push_back(std::string("#version 120 \r\n"));
}
}
for(CGLSLCompiler::SGLSLCompilerDefine &Define : pCompiler->m_Defines)
{
Lines.push_back(std::string("#define ") + Define.m_DefineName + std::string(" ") + Define.m_DefineValue + std::string("\r\n"));
}
if(Type == GL_FRAGMENT_SHADER && !IsNewOpenGL && pCompiler->m_OpenGLVersionMajor <= 3 && pCompiler->m_HasTextureArray)
{
Lines.push_back(std::string("#extension GL_EXT_texture_array : enable\r\n"));
}
CLineReader LineReader;
LineReader.Init(f);
char *ReadLine = NULL;
while((ReadLine = LineReader.Get()))
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{
std::string Line;
pCompiler->ParseLine(Line, ReadLine, Type);
Line.append("\r\n");
Lines.push_back(Line);
}
io_close(f);
const char **ShaderCode = new const char *[Lines.size()];
for(size_t i = 0; i < Lines.size(); ++i)
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{
ShaderCode[i] = Lines[i].c_str();
}
GLuint shader = glCreateShader(Type);
glShaderSource(shader, Lines.size(), ShaderCode, NULL);
glCompileShader(shader);
delete[] ShaderCode;
int CompilationStatus;
glGetShaderiv(shader, GL_COMPILE_STATUS, &CompilationStatus);
if(CompilationStatus == GL_FALSE)
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{
char buff[3000];
GLint maxLength = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength);
glGetShaderInfoLog(shader, maxLength, &maxLength, buff);
dbg_msg("glsl", "%s: %s", pFile, buff);
glDeleteShader(shader);
return false;
}
m_Type = Type;
m_IsLoaded = true;
m_ShaderID = shader;
return true;
}
else
return false;
}
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void CGLSL::DeleteShader()
{
if(!IsLoaded())
return;
m_IsLoaded = false;
glDeleteShader(m_ShaderID);
}
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bool CGLSL::IsLoaded()
{
return m_IsLoaded;
}
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GLuint CGLSL::GetShaderID()
{
return m_ShaderID;
}
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CGLSL::CGLSL()
{
m_IsLoaded = false;
}
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CGLSL::~CGLSL()
{
DeleteShader();
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}
CGLSLCompiler::CGLSLCompiler(int OpenGLVersionMajor, int OpenGLVersionMinor, int OpenGLVersionPatch)
{
m_OpenGLVersionMajor = OpenGLVersionMajor;
m_OpenGLVersionMinor = OpenGLVersionMinor;
m_OpenGLVersionPatch = OpenGLVersionPatch;
m_HasTextureArray = false;
m_TextureReplaceType = 0;
}
void CGLSLCompiler::AddDefine(const std::string &DefineName, const std::string &DefineValue)
{
m_Defines.emplace_back(SGLSLCompilerDefine(DefineName, DefineValue));
}
void CGLSLCompiler::AddDefine(const char *pDefineName, const char *pDefineValue)
{
AddDefine(std::string(pDefineName), std::string(pDefineValue));
}
void CGLSLCompiler::ClearDefines()
{
m_Defines.clear();
}
void CGLSLCompiler::ParseLine(std::string &Line, const char *pReadLine, int Type)
{
bool IsNewOpenGL = m_OpenGLVersionMajor >= 4 || (m_OpenGLVersionMajor == 3 && m_OpenGLVersionMinor == 3);
if(!IsNewOpenGL)
{
const char *pBuff = pReadLine;
char aTmpStr[1024];
size_t TmpStrSize = 0;
while(*pBuff)
{
while(*pBuff && str_isspace(*pBuff))
{
Line.append(1, *pBuff);
++pBuff;
}
while(*pBuff && !str_isspace(*pBuff) && *pBuff != '(' && *pBuff != '.')
{
aTmpStr[TmpStrSize++] = *pBuff;
++pBuff;
}
if(TmpStrSize > 0)
{
aTmpStr[TmpStrSize] = 0;
TmpStrSize = 0;
if(str_comp(aTmpStr, "layout") == 0)
{
//search for ' in'
while(*pBuff && (*pBuff != ' ' || (*(pBuff + 1) && *(pBuff + 1) != 'i') || *(pBuff + 2) != 'n'))
{
++pBuff;
}
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if(*pBuff == ' ' && *(pBuff + 1) && *(pBuff + 1) == 'i' && *(pBuff + 2) == 'n')
{
pBuff += 3;
Line.append("attribute");
Line.append(pBuff);
return;
}
else
{
dbg_msg("shadercompiler", "Fix shader for older OpenGL versions.");
}
}
else if(str_comp(aTmpStr, "noperspective") == 0 || str_comp(aTmpStr, "smooth") == 0 || str_comp(aTmpStr, "flat") == 0)
{
//search for 'in' or 'out'
while(*pBuff && ((*pBuff != 'i' || *(pBuff + 1) != 'n') && (*pBuff != 'o' || (*(pBuff + 1) && *(pBuff + 1) != 'u') || *(pBuff + 2) != 't')))
{
++pBuff;
}
bool Found = false;
if(*pBuff)
{
if(*pBuff == 'i' && *(pBuff + 1) == 'n')
{
pBuff += 2;
Found = true;
}
else if(*pBuff == 'o' && *(pBuff + 1) && *(pBuff + 1) == 'u' && *(pBuff + 2) == 't')
{
pBuff += 3;
Found = true;
}
}
if(!Found)
{
dbg_msg("shadercompiler", "Fix shader for older OpenGL versions.");
}
Line.append("varying");
Line.append(pBuff);
return;
}
else if(str_comp(aTmpStr, "out") == 0 || str_comp(aTmpStr, "in") == 0)
{
if(Type == GL_FRAGMENT_SHADER && str_comp(aTmpStr, "out") == 0)
return;
Line.append("varying");
Line.append(pBuff);
return;
}
else if(str_comp(aTmpStr, "FragClr") == 0)
{
Line.append("gl_FragColor");
Line.append(pBuff);
return;
}
else if(str_comp(aTmpStr, "texture") == 0)
{
if(m_TextureReplaceType == GLSL_COMPILER_TEXTURE_REPLACE_TYPE_2D)
Line.append("texture2D");
else if(m_TextureReplaceType == GLSL_COMPILER_TEXTURE_REPLACE_TYPE_3D)
Line.append("texture3D");
else if(m_TextureReplaceType == GLSL_COMPILER_TEXTURE_REPLACE_TYPE_2D_ARRAY)
Line.append("texture2DArray");
std::string RestLine;
ParseLine(RestLine, pBuff, Type);
Line.append(RestLine);
return;
}
else
{
Line.append(aTmpStr);
}
}
if(*pBuff)
{
Line.append(1, *pBuff);
++pBuff;
}
}
}
else
{
Line = pReadLine;
}
}