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comparison README.iphoneos @ 4666:52e871f486b8

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Revision 3163 added the following formats for OpenGL ES: SDL_PIXELFORMAT_ABGR4444, SDL_PIXELFORMAT_ABGR1555, SDL_PIXELFORMAT_BGR565
author Sam Lantinga <slouken@libsdl.org>
date Fri, 16 Jul 2010 22:16:05 -0700
parents 64ce267332c6
children f9ab8df6d45a
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4665:c2493813a2f4 4666:52e871f486b8
53 Notes -- OpenGL ES 53 Notes -- OpenGL ES
54 ============================================================================== 54 ==============================================================================
55 55
56 Your SDL application for iPhone uses OpenGL ES for video by default. 56 Your SDL application for iPhone uses OpenGL ES for video by default.
57 57
58 OpenGL ES for iPhone supports two display pixel formats, RGBA8 and RGB565, which provide a 32 bit and 16 bit color buffer respectively. By default, the implementation uses RGB565, but you may use RGBA8 by setting each color component to 8 bits in SDL_GL_SetAttribute. 58 OpenGL ES for iPhone supports several display pixel formats, such as RGBA8 and RGB565, which provide a 32 bit and 16 bit color buffer respectively. By default, the implementation uses RGB565, but you may use RGBA8 by setting each color component to 8 bits in SDL_GL_SetAttribute.
59 59
60 If your application doesn't use OpenGL's depth buffer, you may find significant performance improvement by setting SDL_GL_DEPTH_SIZE to 0. 60 If your application doesn't use OpenGL's depth buffer, you may find significant performance improvement by setting SDL_GL_DEPTH_SIZE to 0.
61 61
62 Finally, if your application completely redraws the screen each frame, you may find significant performance improvement by setting the attribute SDL_GL_RETAINED_BACKING to 1. 62 Finally, if your application completely redraws the screen each frame, you may find significant performance improvement by setting the attribute SDL_GL_RETAINED_BACKING to 1.
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