_glthread_Mutex Mutex; /**< for thread safety */
GLuint Name; /* if zero, this is a window system framebuffer */
GLint RefCount;
+ GLboolean DeletePending;
GLvisual Visual; /**< The framebuffer's visual.
Immutable if this is a window system buffer.
#define IMAGE_HISTOGRAM_BIT 0x200
#define IMAGE_MIN_MAX_BIT 0x400
#define IMAGE_CLAMP_BIT 0x800 /* extra */
+#define IMAGE_RED_TO_LUMINANCE 0x1000
/** Pixel Transfer ops up to convolution */