/*
=================
R_LinkGLSLShader
links the GLSL vertex and fragment shaders together to form a GLSL program
=================
*/
bool R_LinkGLSLShader( shaderProgram_t *shaderProgram, bool needsAttributes ) {
GLint linked;
shaderProgram->program = qglCreateProgramObjectARB( );
qglAttachObjectARB( shaderProgram->program, shaderProgram->vertexShader );
qglAttachObjectARB( shaderProgram->program, shaderProgram->fragmentShader );
if ( needsAttributes ) {
qglBindAttribLocationARB( shaderProgram->program, 8, "attr_TexCoord" );
qglBindAttribLocationARB( shaderProgram->program, 9, "attr_Tangent" );
qglBindAttribLocationARB( shaderProgram->program, 10, "attr_Bitangent" );
qglBindAttribLocationARB( shaderProgram->program, 11, "attr_Normal" );
}
qglLinkProgramARB( shaderProgram->program );
qglGetObjectParameterivARB( shaderProgram->program, GL_OBJECT_LINK_STATUS_ARB, &linked );
if ( !linked ) {
common->Printf( "R_LinkGLSLShader: program failed to link\n" );
return false;
}
return true;
}
static void R_InitFragmentShader( const char *filename, GLhandleARB *fragmentShader, GLhandleARB *program, GLhandleARB vertexShader, const char *fallbackShader ) {
int len;
int slen;
void *shaderSource;
char *text;
qboolean fallback = qfalse;
if ( !glsl ) {
return;
}
Com_VPrintf( "^5%s ->\n", filename );
*fragmentShader = qglCreateShaderObjectARB( GL_FRAGMENT_SHADER_ARB );
len = ri.FS_ReadFile( filename, &shaderSource );
if ( len <= 0 ) {
len = strlen(fallbackShader);
if ( len ) {
Com_VPrintf( "^1using fallback shader\n" );
//ri.FS_FreeFile(shaderSource);
//shaderSource = (void *)fallbackShader;
fallback = qtrue;
} else {
Com_VPrintf( "^1couldn't find file\n" );
R_DeleteGlslShadersAndPrograms();
glsl = qfalse;
return;
}
}
slen = strlen(ShaderExtensions);
text = (char *)malloc(len + slen + 3);
if (!text) {
Com_VPrintf( "R_InitFragmentShader() couldn't allocate memory for GLSL shader file\n" );
if ( !fallbackShader ) ri.FS_FreeFile(shaderSource);
qglDeleteObjectARB(*fragmentShader);
return;
}
Com_sprintf( text, len + slen + 3, "%s\n%s\n", ShaderExtensions, fallback ? fallbackShader : (char *)shaderSource );
qglShaderSourceARB(*fragmentShader, 1, (const char **)&text, NULL);
qglCompileShaderARB(*fragmentShader);
printGlslLog(*fragmentShader);
if ( !fallbackShader ) ri.FS_FreeFile(shaderSource);
free(text);
*program = qglCreateProgramObjectARB();
qglAttachObjectARB(*program, vertexShader);
qglAttachObjectARB(*program, *fragmentShader);
qglLinkProgramARB(*program);
printGlslLog(*program);
//Com_VPrintf("\n");
}
static unsigned int R_CompileGLSLProgram(unsigned int vertexstrings_count, const char **vertexstrings_list, unsigned int fragmentstrings_count, const char **fragmentstrings_list)
{
GLint programLinked;
GLhandleARB programObject = 0;
char compileLog[4096];
//R_CheckError();
// if (!R.ext.ARB_fragment_shader)
if (!gl_support_GLSL_shaders)
return 0;
programObject = qglCreateProgramObjectARB();
//R_CheckError();
if( programObject == 0 ) {
return 0;
}
if( R_CompileGLSLShader( programObject, GL_VERTEX_SHADER_ARB, vertexstrings_count, vertexstrings_list ) == 0 ||
R_CompileGLSLShader( programObject, GL_FRAGMENT_SHADER_ARB, fragmentstrings_count, fragmentstrings_list ) == 0 ) {
qglDeleteObjectARB( programObject );
// R_CheckError();
return 0;
}
qglLinkProgramARB( programObject );
// R_CheckError();
qglGetObjectParameterivARB( programObject, GL_OBJECT_LINK_STATUS_ARB, &programLinked );
qglGetInfoLogARB( programObject, sizeof( compileLog ), NULL, compileLog );
if( *compileLog ) {
Con_Printf("program link log:\n%s\n", compileLog);
// software vertex shader is ok but software fragment shader is WAY
// too slow, fail program if so.
// NOTE: this string might be ATI specific, but that's ok because the
// ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
// software fragment shader due to low instruction and dependent
// texture limits.
if (strstr( compileLog, "fragment shader will run in software" ))
programLinked = false;
}
//R_CheckError();
if( !programLinked ) {
qglDeleteObjectARB( programObject );
return 0;
}
//R_CheckError();
return (unsigned int) programObject;
}
static int GLSL_InitGPUShader2(shaderProgram_t * program, const char *name, int attribs, const char *vpCode, const char *fpCode)
{
ri.Printf(PRINT_DEVELOPER, "------- GPU shader -------\n");
if(strlen(name) >= MAX_QPATH)
{
ri.Error(ERR_DROP, "GLSL_InitGPUShader2: \"%s\" is too long", name);
}
Q_strncpyz(program->name, name, sizeof(program->name));
program->program = qglCreateProgramObjectARB();
program->attribs = attribs;
if (!(GLSL_CompileGPUShader(program->program, &program->vertexShader, vpCode, strlen(vpCode), GL_VERTEX_SHADER_ARB)))
{
ri.Printf(PRINT_ALL, "GLSL_InitGPUShader2: Unable to load \"%s\" as GL_VERTEX_SHADER_ARB\n", name);
qglDeleteObjectARB(program->program);
return 0;
}
if(fpCode)
{
if(!(GLSL_CompileGPUShader(program->program, &program->fragmentShader, fpCode, strlen(fpCode), GL_FRAGMENT_SHADER_ARB)))
{
ri.Printf(PRINT_ALL, "GLSL_InitGPUShader2: Unable to load \"%s\" as GL_FRAGMENT_SHADER_ARB\n", name);
qglDeleteObjectARB(program->program);
return 0;
}
}
if(attribs & ATTR_POSITION)
qglBindAttribLocationARB(program->program, ATTR_INDEX_POSITION, "attr_Position");
if(attribs & ATTR_TEXCOORD)
qglBindAttribLocationARB(program->program, ATTR_INDEX_TEXCOORD, "attr_TexCoord0");
if(attribs & ATTR_LIGHTCOORD)
qglBindAttribLocationARB(program->program, ATTR_INDEX_LIGHTCOORD, "attr_TexCoord1");
// if(attribs & ATTR_TEXCOORD2)
// qglBindAttribLocationARB(program->program, ATTR_INDEX_TEXCOORD2, "attr_TexCoord2");
// if(attribs & ATTR_TEXCOORD3)
// qglBindAttribLocationARB(program->program, ATTR_INDEX_TEXCOORD3, "attr_TexCoord3");
if(attribs & ATTR_TANGENT)
qglBindAttribLocationARB(program->program, ATTR_INDEX_TANGENT, "attr_Tangent");
if(attribs & ATTR_NORMAL)
qglBindAttribLocationARB(program->program, ATTR_INDEX_NORMAL, "attr_Normal");
if(attribs & ATTR_COLOR)
qglBindAttribLocationARB(program->program, ATTR_INDEX_COLOR, "attr_Color");
if(attribs & ATTR_PAINTCOLOR)
qglBindAttribLocationARB(program->program, ATTR_INDEX_PAINTCOLOR, "attr_PaintColor");
if(attribs & ATTR_LIGHTDIRECTION)
qglBindAttribLocationARB(program->program, ATTR_INDEX_LIGHTDIRECTION, "attr_LightDirection");
if(attribs & ATTR_POSITION2)
qglBindAttribLocationARB(program->program, ATTR_INDEX_POSITION2, "attr_Position2");
if(attribs & ATTR_NORMAL2)
qglBindAttribLocationARB(program->program, ATTR_INDEX_NORMAL2, "attr_Normal2");
if(attribs & ATTR_TANGENT2)
qglBindAttribLocationARB(program->program, ATTR_INDEX_TANGENT2, "attr_Tangent2");
GLSL_LinkProgram(program->program);
return 1;
}
