Mercurial > sdl-ios-xcode
view src/loadso/beos/SDL_sysloadso.c @ 2359:b70b96e615d2 gsoc2008_iphone
These files are the OpenGL ES render driver. You should be able to use them on any platform that supports OpenGL ES -- not just iPhone. The driver is based off the OpenGL render driver.
There are a few differences between OpenGL and OpenGL ES that present difficulties for this driver:
- OpenGL ES does NOT support many pixel formats (for example, no GL_BGR). Also, when using texture functions format and internalFormat must be the same -- this means 32 bit packed formats like SDL_PIXELFORMAT_BGR888 cannot be automatically converted to GL_RGB (which is 24bpp).
- OpenGL ES doesn't have GL_PACK_ROW_LENGTH, which means data must be reformatted before uploading changes to dirty rects. This change has been added.
- OpenGL ES doesn't support paletted textures, though there is an extension. I'm looking into this.
Some other notable differences:
- OpenGL ES has an extension called GL_OES_draw_texture which allows for quicker 2D sprite-type drawing. I use this in GL_RenderCopy when it is available. The iPhone supports the extension, but the iPhone Simulator does not (presently).
- No glBegin() / glEnd() and no GL_QUADS! I'm using glDrawArrays with GL_TRIANGLE_STRIP instead!
author | Holmes Futrell <hfutrell@umail.ucsb.edu> |
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date | Thu, 17 Jul 2008 23:31:42 +0000 |
parents | 2c835d58faad |
children | 99210400e8b9 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #ifdef SDL_LOADSO_BEOS /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* System dependent library loading routines */ #include <stdio.h> #include <be/kernel/image.h> #include "SDL_loadso.h" void * SDL_LoadObject(const char *sofile) { void *handle = NULL; image_id library_id = load_add_on(sofile); if (library_id < 0) { SDL_SetError(strerror((int) library_id)); } else { handle = (void *) (library_id); } return (handle); } void * SDL_LoadFunction(void *handle, const char *name) { void *sym = NULL; image_id library_id = (image_id) handle; status_t rc = get_image_symbol(library_id, name, B_SYMBOL_TYPE_TEXT, &sym); if (rc != B_NO_ERROR) { SDL_SetError(strerror(rc)); } return (sym); } void SDL_UnloadObject(void *handle) { image_id library_id; if (handle != NULL) { library_id = (image_id) handle; unload_add_on(library_id); } } #endif /* SDL_LOADSO_BEOS */ /* vi: set ts=4 sw=4 expandtab: */