releaseRenderedTexture(_:forCGLContext:)

Declaration

optional func releaseRenderedTexture(_ name: GLuint, forCGLContext cgl_ctx: CGLContextObj!)

Parameters

• name:

  The name of the previously bound texture.

• cgl_ctx:

  The CGL context.

Discussion

Your OpenGL code should save and restore all states except for those that are part of GL_CURRENT_BIT (vertex position, color, texture, and so on). Also use CGL macros instead of changing the current context, by including this statement:

#import <OpenGL/CGLMacro.h>

For more details, see Quartz Composer Custom Patch Programming Guide.

See Also

Rendering an Image to a Destination

• render(toBuffer:withBytesPerRow:pixelFormat:forBounds:)
• copyRenderedTexture(forCGLContext:pixelFormat:bounds:isFlipped:)
• render(withCGLContext:forBounds:)