OOShaderMaterial.m File Reference

import "OOShaderMaterial.h"

Include dependency graph for OOShaderMaterial.m:

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Functions
static BOOL	GetShaderSource (NSString *fileName, NSString *shaderType, NSString *prefix, NSString **outResult)

Function Documentation

GetShaderSource()

static BOOL GetShaderSource ( NSString * fileName, NSString * shaderType, NSString * prefix, NSString ** outResult )

static

Definition at line 860 of file OOShaderMaterial.m.

{
    NSString                *result = nil;
    NSArray                 *extensions = nil;
    NSEnumerator            *extEnum = nil;
    NSString                *extension = nil;
    NSString                *nameWithExtension = nil;
    
    if (fileName == nil)  return YES;   // It's OK for one or the other of the shaders to be undefined.
    
    result = [ResourceManager stringFromFilesNamed:fileName inFolder:@"Shaders"];
    if (result == nil)
    {
        extensions = [NSArray arrayWithObjects:shaderType, [shaderType substringToIndex:4], nil];   // vertex and vert, or fragment and frag
        
        // Futureproofing -- in future, we may wish to support automatic selection between supported shader languages.
        if (![fileName pathHasExtensionInArray:extensions])
        {
            for (extEnum = [extensions objectEnumerator]; (extension = [extEnum nextObject]); )
            {
                nameWithExtension = [fileName stringByAppendingPathExtension:extension];
                result = [ResourceManager stringFromFilesNamed:nameWithExtension
                                                      inFolder:@"Shaders"];
                if (result != nil) break;
            }
        }
        if (result == nil)
        {
            OOLog(kOOLogFileNotFound, @"GLSL ERROR: failed to find %@ program %@.", shaderType, fileName);
            return NO;
        }
    }
    
    if (outResult != NULL) *outResult = result;
    return YES;
}

References kOOLogFileNotFound, nil, OOLog, and ResourceManager::stringFromFilesNamed:inFolder:.

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