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