Mercurial > sdl-ios-xcode
view src/video/nanox/SDL_nxmodes.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 | c121d94672cb |
children | 99210400e8b9 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga Copyright (C) 2001 Hsieh-Fu Tsai This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org Hsieh-Fu Tsai clare@setabox.com */ #include "SDL_config.h" #include "SDL_stdinc.h" #include "SDL_nxmodes_c.h" SDL_Rect ** NX_ListModes(_THIS, SDL_PixelFormat * format, Uint32 flags) { if (flags & SDL_FULLSCREEN) return SDL_modelist; if (SDL_Visual.bpp == format->BitsPerPixel) { return ((SDL_Rect **) - 1); } else { return ((SDL_Rect **) 0); } } void NX_FreeVideoModes(_THIS) { int i; if (SDL_modelist) { for (i = 0; SDL_modelist[i]; ++i) { SDL_free(SDL_modelist[i]); } SDL_free(SDL_modelist); SDL_modelist = NULL; } } int NX_EnterFullScreen(_THIS) { if (!currently_fullscreen) { GR_SCREEN_INFO si; GrGetScreenInfo(&si); GrResizeWindow(FSwindow, si.cols, si.rows); GrUnmapWindow(SDL_Window); GrMapWindow(FSwindow); GrRaiseWindow(FSwindow); GrSetFocus(FSwindow); currently_fullscreen = 1; } return 1; } int NX_LeaveFullScreen(_THIS) { if (currently_fullscreen) { GrUnmapWindow(FSwindow); GrMapWindow(SDL_Window); GrRaiseWindow(SDL_Window); GrSetFocus(SDL_Window); currently_fullscreen = 0; } return 0; } /* vi: set ts=4 sw=4 expandtab: */