Mercurial > sdl-ios-xcode
view src/video/xbios/SDL_xbios_sb3.h @ 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> |
|---|---|
| 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 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 */ #include "SDL_config.h" /* ScreenBlaster 3 definitions Patrice Mandin */ #ifndef _SDL_xbios_sb3_h_ #define _SDL_xbios_sb3_h_ /*--- Defines ---*/ #ifndef C_SCPN #define C_SCPN 0x5343504EL #endif #define SCPN_DEV_1BPP 0 #define SCPN_DEV_2BPP 1 #define SCPN_DEV_4BPP 2 #define SCPN_DEV_8BPP 3 #define SCPN_DEV_16BPP 4 extern const int SDL_XBIOS_scpn_planes_device[]; /*--- Types ---*/ typedef struct { unsigned short virtual_width; /* Virtual screen width */ unsigned short virtual_height; /* Virtual screen height */ unsigned short visible_width; /* Visible width */ unsigned short visible_height; /* Visible height */ unsigned short h_pos; /* Horizontal position in virtual screen */ unsigned short v_pos; /* Vertical position in virtual screen */ unsigned short dummy; unsigned long size; /* Size of screen in bytes */ unsigned short device; /* Device number to find planes = getRez() */ /* = Index in scpn_planes_device[] */ } __attribute__ ((packed)) scpn_screeninfo_t; typedef struct { unsigned long magic; /* just a BRA assembler jump */ unsigned short version; void *dummy1; unsigned short ptsout0_1; unsigned short ptsout0_2; unsigned short dummy3; unsigned char date[8]; /* Date of program build */ unsigned char asm_string[30]; /* 10 times the 'ASM' string */ unsigned short dummy4; scpn_screeninfo_t *screen_info; unsigned short dummy6; } __attribute__ ((packed)) scpn_cookie_t; /*--- Function prototypes ---*/ int SDL_XBIOS_SB3Usable(scpn_cookie_t * cookie_scpn); void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t * cookie_scpn); #endif /* _SDL_xbios_sb3_h_ */ /* vi: set ts=4 sw=4 expandtab: */