static void GLSL_PrintInfoLog(GLhandleARB object, qboolean developerOnly)
{
char *msg;
static char msgPart[1024];
int maxLength = 0;
int i;
int printLevel = developerOnly ? PRINT_DEVELOPER : PRINT_ALL;
qglGetObjectParameterivARB(object, GL_OBJECT_INFO_LOG_LENGTH_ARB, &maxLength);
if (maxLength <= 0)
{
ri.Printf(printLevel, "No compile log.\n");
return;
}
ri.Printf(printLevel, "compile log:\n");
if (maxLength < 1023)
{
qglGetInfoLogARB(object, maxLength, &maxLength, msgPart);
msgPart[maxLength + 1] = '\0';
ri.Printf(printLevel, "%s\n", msgPart);
}
else
{
msg = ri.Malloc(maxLength);
qglGetInfoLogARB(object, maxLength, &maxLength, msg);
for(i = 0; i < maxLength; i += 1024)
{
Q_strncpyz(msgPart, msg + i, sizeof(msgPart));
ri.Printf(printLevel, "%s\n", msgPart);
}
ri.Free(msg);
}
}
static void printGlslLog( GLhandleARB obj ) {
int infoLogLength = 0;
char infoLog[1024];
int len;
qglGetObjectParameterivARB(obj, GL_OBJECT_INFO_LOG_LENGTH_ARB, &infoLogLength);
if (infoLogLength > 0) {
qglGetInfoLogARB(obj, 1024, &len, infoLog);
Com_VPrintf( "%s\n", infoLog );
}
}
static GLhandleARB R_CompileGLSLShader( GLhandleARB programObject, GLenum shaderType, unsigned int sourceStringCount, const char *sourceStrings[] ) {
GLhandleARB shaderObject;
GLint shaderCompiled;
const char *shaderName;
int i;
char compileLog[ 4096 ];
if( shaderType == GL_VERTEX_SHADER_ARB ) {
shaderName = "vertex shader";
} else {
shaderName = "fragment shader";
}
// run a basic error check
for (i = 0 ; i < sourceStringCount ; i++)
{
if (sourceStrings[i] == 0)
{
Con_Printf("R_CompileGLSLShader: string #%i of %s is NULL!\n", i, shaderName);
return 0;
}
}
// R_CheckError();
shaderObject = qglCreateShaderObjectARB( shaderType );
if( shaderObject == 0 )
{
// R_CheckError();
return 0;
}
if( sourceStringCount != 0 ) {
qglShaderSourceARB( shaderObject, sourceStringCount, sourceStrings, NULL);
qglCompileShaderARB( shaderObject );
// R_CheckError();
qglGetObjectParameterivARB( shaderObject, GL_OBJECT_COMPILE_STATUS_ARB, &shaderCompiled );
qglGetInfoLogARB( shaderObject, sizeof(compileLog), NULL, compileLog);
if( *compileLog ) {
Con_Printf("%s compile log:\n%s\n", shaderName, compileLog);
}
if( !shaderCompiled ) {
qglDeleteObjectARB( shaderObject );
// R_CheckError();
return 0;
}
}
// TODO: check whether an empty shader object can be compiled!
qglAttachObjectARB( programObject, shaderObject);
qglDeleteObjectARB( shaderObject );
//R_CheckError();
return shaderObject;
}
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;
}