1GL_NV_framebuffer_blit 2https://www.khronos.org/registry/OpenGL/extensions/NV/NV_framebuffer_blit.txt 3GL_NV_framebuffer_blit 4 5 GL_DRAW_FRAMEBUFFER_BINDING_NV 0x8CA6 6 GL_READ_FRAMEBUFFER_NV 0x8CA8 7 GL_DRAW_FRAMEBUFFER_NV 0x8CA9 8 GL_READ_FRAMEBUFFER_BINDING_NV 0x8CAA 9 void glBlitFramebufferNV (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) 10