I tested Xcode 7 with but my cocos2d 2.1 games crash on simulator or on devices:
ccShader_PositionColorLenghtTexture_frag.h
2015-06-15 22:36:13.319 NanoWar[18789:456971] cocos2d: ERROR: 0:12: '' : syntax error: #extension must always be before any non-preprocessor tokens
and
cocos2d: ERROR: 0:26: Invalid call of undeclared identifier 'fwidth'
This class crash the game
#extension GL_OES_standard_derivatives : enable
#ifdef GL_ES
varying mediump vec4 v_color;
varying mediump vec2 v_texcoord;
#else
varying vec4 v_color;
varying vec2 v_texcoord;
#endif
void main()
{
#ifdef GL_OES_standard_derivatives
#if defined GL_OES_standard_derivatives
gl_FragColor = v_color*smoothstep(0.0, length(fwidth(v_texcoord)), 1.0 - length(v_texcoord));
#else
gl_FragColor = v_color*step(0.0, 1.0 - length(v_texcoord));
#endif
#endif
}
I'm "rae" on forum.cocos2d-objc.org and I might as well put my answer here as well, since all roads lead to StackOverflow. :-)
If you are using an older release of Cocos 2D, this may help. I edited CCGLProgram.m to change the beginning of the -(BOOL)compileShader: method thusly:
#define EXTENSION_STRING "#extension GL_OES_standard_derivatives : enable"
static NSString * g_extensionStr = @EXTENSION_STRING;
- (BOOL)compileShader:(GLuint *)shader type:(GLenum)type byteArray:(const GLchar *)source
{
GLint status;
if (!source)
return NO;
// BEGIN workaround for Xcode 7 bug
BOOL hasExtension = NO;
NSString *sourceStr = [NSString stringWithUTF8String:source];
if([sourceStr rangeOfString:g_extensionStr].location != NSNotFound) {
hasExtension = YES;
NSArray *strs = [sourceStr componentsSeparatedByString:g_extensionStr];
assert(strs.count == 2);
sourceStr = [strs componentsJoinedByString:@"\n"];
source = (GLchar *)[sourceStr UTF8String];
}
const GLchar *sources[] = {
(hasExtension ? EXTENSION_STRING "\n" : ""),
#ifdef __CC_PLATFORM_IOS
(type == GL_VERTEX_SHADER ? "precision highp float;\n" : "precision mediump float;\n"),
#endif
"uniform mat4 CC_PMatrix;\n"
"uniform mat4 CC_MVMatrix;\n"
"uniform mat4 CC_MVPMatrix;\n"
"uniform vec4 CC_Time;\n"
"uniform vec4 CC_SinTime;\n"
"uniform vec4 CC_CosTime;\n"
"uniform vec4 CC_Random01;\n"
"//CC INCLUDES END\n\n",
source,
};
// END workaround for Xcode 7 bug
It's a hack, but it works for up to Xcode 7 beta 2. Hope this is helpful to someone googling for this.
Reid