iPhone对OpenGL ES的支持程度！

GLBenchMark的结果：

http://www.glbenchmark.com/phonedetails.jsp?benchmark=pro&D=Apple%20iPhone&testgroup=gl

这个很重要，复制一份，以备不时之需：

OpenGL ES Environment Variables
GL_VENDOR	Imagination Technologies
GL_VERSION	OpenGL ES-CM 1.1
GL_RENDERER	PowerVR MBXLite with VGPLite
GL_EXTENSIONS	GL_OES_byte_coordinates GL_OES_compressed_paletted_texture GL_OES_fixed_point GL_OES_point_size_array GL_OES_point_sprite GL_OES_read_format GL_OES_single_precision GL_ARB_texture_env_combine GL_ARB_texture_env_dot3 GL_OES_draw_texture GL_IMG_texture_format_BGRA8888 GL_APPLE_texture_rectangle GL_APPLE_client_storage
GL_RED_BITS	8
GL_GREEN_BITS	8
GL_BLUE_BITS	8
GL_ALPHA_BITS	8
GL_DEPTH_BITS	24
GL_STENCIL_BITS	0
GL_SUBPIXEL_BITS	4
GL_MAX_LIGHTS	8
GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES	6408
GL_IMPLEMENTATION_COLOR_READ_TYPE_OES	5121
GL_MAX_CLIP_PLANES	1
GL_MAX_MODELVIEW_STACK_DEPTH	16
GL_MAX_TEXTURE_STACK_DEPTH	4
GL_MAX_PROJECTION_STACK_DEPTH	2
GL_MAX_TEXTURE_SIZE	2048
GL_MAX_TEXTURE_UNITS	2
GL_MAX_VIEWPORT_WIDTH	2048
GL_MAX_VIEWPORT_HEIGHT	1024
GL_NUM_COMPRESSED_TEXTURE_FORMATS	14
GL_ALIASED_LINE_WIDTH_MIN	1
GL_ALIASED_LINE_WIDTH_MAX	32
GL_ALIASED_POINT_SIZE_MIN	1
GL_ALIASED_POINT_SIZE_MAX	32
GL_SMOOTH_LINE_WIDTH_MIN	1
GL_SMOOTH_LINE_WIDTH_MAX	1
GL_SMOOTH_POINT_SIZE_MIN	1
GL_SMOOTH_POINT_SIZE_MAX	1

EGL Native Platform Graphics Interface
EGL Vendor	Imagination Technologies
EGL Version	1.1 build 1
EGL Extensions	EGL_IMG_power_management
EGL Selected Configuration	EGL_CONFIG_ID: 9 EGL_BUFFER_SIZE: 32 EGL_ALPHA_SIZE: 8 EGL_BLUE_SIZE: 8 EGL_GREEN_SIZE: 8 EGL_RED_SIZE: 8 EGL_DEPTH_SIZE: 24 EGL_STENCIL_SIZE: 0 EGL_CONFIG_CAVEAT: 12344 EGL_LEVEL: 0 EGL_MAX_PBUFFER_HEIGHT: 1024 EGL_MAX_PBUFFER_PIXELS: 2097152 EGL_MAX_PBUFFER_WIDTH: 2048 EGL_NATIVE_RENDERABLE: 0 EGL_NATIVE_VISUAL_ID: 0 EGL_NATIVE_VISUAL_TYPE: 0 EGL_SAMPLES: 0 EGL_SAMPLE_BUFFERS: 0 EGL_SURFACE_TYPE: 7 EGL_TRANSPARENT_TYPE: 12344 EGL_TRANSPARENT_BLUE_VALUE: 0 EGL_TRANSPARENT_GREEN_VALUE: 0 EGL_TRANSPARENT_RED_VALUE: 0