Mercurial > sdl-ios-xcode
annotate include/SDL_endian.h @ 821:30168104389f
Date: Sat, 14 Feb 2004 14:52:40 +0200
From: "Mike Gorchak"
Subject: Batch of the QNX6 fixes for the SDL
1. Updated readme.QNX
2. Fixed crashes during intensive window updating under fast machines (got over 200 rectangles for update).
3. Fixed double-buffered fullscreen modes, now it works as needed.
4. Fixed Photon detection algorithm.
5. Fixed HWSURFACE update function.
6. Added SDL_PHOTON_FULLSCREEN_REFRESH environment variable support for control refresh rates under Photon.
7. Added 640x400 fullscreen mode emulation via 640x480 (if videodriver not supports original 640x400 mode of course) shifted by 40 vertical pixels from begin, to center it. It's needed for some old DOS games which ran in doubled 320x200 mode.
8. Added available video ram amount support.
8. Added hardware surface allocation/deallocation support if current videomode and videodriver supports it.
9. Added hardware filling support.
10. Added hardware blits support (simple and colorkeyed).
And I've added to testvidinfo test color-keyed blits benchmark (maybe need to add alpha blits benchmark too ?). Currently Photon not supporting any alpha hardware blittings (all drivers lack of alpha blitting code support, only software alpha blitting exist in photon, which is hundreds times slowest than the SDL's one). So I've not added the alpha support. I suppose new QNX 6.3 will have the hardware alpha support, so when it will be done, I'll add alpha support.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 14 Feb 2004 20:22:21 +0000 |
| parents | b8d311d90021 |
| children | 85af65457959 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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Updated the headers with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Functions for reading and writing endian-specific values */ | |
| 29 | |
| 30 #ifndef _SDL_endian_h | |
| 31 #define _SDL_endian_h | |
| 32 | |
| 33 /* These functions read and write data of the specified endianness, | |
| 34 dynamically translating to the host machine endianness. | |
| 35 | |
| 36 e.g.: If you want to read a 16 bit value on big-endian machine from | |
| 37 an open file containing little endian values, you would use: | |
| 38 value = SDL_ReadLE16(rp); | |
| 39 Note that the read/write functions use SDL_RWops pointers | |
| 40 instead of FILE pointers. This allows you to read and write | |
| 41 endian values from large chunks of memory as well as files | |
| 42 and other data sources. | |
| 43 */ | |
| 44 | |
| 45 #include <stdio.h> | |
| 46 | |
| 47 #include "SDL_types.h" | |
| 48 #include "SDL_rwops.h" | |
| 49 #include "SDL_byteorder.h" | |
| 50 | |
| 51 #include "begin_code.h" | |
| 52 /* Set up for C function definitions, even when using C++ */ | |
| 53 #ifdef __cplusplus | |
| 54 extern "C" { | |
| 55 #endif | |
| 56 | |
| 57 /* The macros used to swap values */ | |
| 58 /* Try to use superfast macros on systems that support them */ | |
| 59 #ifdef linux | |
| 60 #include <asm/byteorder.h> | |
| 61 #ifdef __arch__swab16 | |
| 62 #define SDL_Swap16 __arch__swab16 | |
| 63 #endif | |
| 64 #ifdef __arch__swab32 | |
| 65 #define SDL_Swap32 __arch__swab32 | |
| 66 #endif | |
| 67 #endif /* linux */ | |
| 68 /* Use inline functions for compilers that support them, and static | |
| 69 functions for those that do not. Because these functions become | |
| 70 static for compilers that do not support inline functions, this | |
| 71 header should only be included in files that actually use them. | |
| 72 */ | |
| 73 #ifndef SDL_Swap16 | |
| 74 static __inline__ Uint16 SDL_Swap16(Uint16 D) { | |
| 75 return((D<<8)|(D>>8)); | |
| 76 } | |
| 77 #endif | |
| 78 #ifndef SDL_Swap32 | |
| 79 static __inline__ Uint32 SDL_Swap32(Uint32 D) { | |
| 80 return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24)); | |
| 81 } | |
| 82 #endif | |
| 83 #ifdef SDL_HAS_64BIT_TYPE | |
| 84 #ifndef SDL_Swap64 | |
| 85 static __inline__ Uint64 SDL_Swap64(Uint64 val) { | |
| 86 Uint32 hi, lo; | |
| 87 | |
| 88 /* Separate into high and low 32-bit values and swap them */ | |
| 89 lo = (Uint32)(val&0xFFFFFFFF); | |
| 90 val >>= 32; | |
| 91 hi = (Uint32)(val&0xFFFFFFFF); | |
| 92 val = SDL_Swap32(lo); | |
| 93 val <<= 32; | |
| 94 val |= SDL_Swap32(hi); | |
| 95 return(val); | |
| 96 } | |
| 97 #endif | |
| 98 #else | |
| 99 #ifndef SDL_Swap64 | |
| 100 /* This is mainly to keep compilers from complaining in SDL code. | |
| 101 If there is no real 64-bit datatype, then compilers will complain about | |
| 102 the fake 64-bit datatype that SDL provides when it compiles user code. | |
| 103 */ | |
| 104 #define SDL_Swap64(X) (X) | |
| 105 #endif | |
| 106 #endif /* SDL_HAS_64BIT_TYPE */ | |
| 107 | |
| 108 | |
| 109 /* Byteswap item from the specified endianness to the native endianness */ | |
| 110 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 111 #define SDL_SwapLE16(X) (X) | |
| 112 #define SDL_SwapLE32(X) (X) | |
| 113 #define SDL_SwapLE64(X) (X) | |
| 114 #define SDL_SwapBE16(X) SDL_Swap16(X) | |
| 115 #define SDL_SwapBE32(X) SDL_Swap32(X) | |
| 116 #define SDL_SwapBE64(X) SDL_Swap64(X) | |
| 117 #else | |
| 118 #define SDL_SwapLE16(X) SDL_Swap16(X) | |
| 119 #define SDL_SwapLE32(X) SDL_Swap32(X) | |
| 120 #define SDL_SwapLE64(X) SDL_Swap64(X) | |
| 121 #define SDL_SwapBE16(X) (X) | |
| 122 #define SDL_SwapBE32(X) (X) | |
| 123 #define SDL_SwapBE64(X) (X) | |
| 124 #endif | |
| 125 | |
| 126 /* Read an item of the specified endianness and return in native format */ | |
|
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127 extern DECLSPEC Uint16 SDLCALL SDL_ReadLE16(SDL_RWops *src); |
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Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
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128 extern DECLSPEC Uint16 SDLCALL SDL_ReadBE16(SDL_RWops *src); |
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9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
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129 extern DECLSPEC Uint32 SDLCALL SDL_ReadLE32(SDL_RWops *src); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
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130 extern DECLSPEC Uint32 SDLCALL SDL_ReadBE32(SDL_RWops *src); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
131 extern DECLSPEC Uint64 SDLCALL SDL_ReadLE64(SDL_RWops *src); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
132 extern DECLSPEC Uint64 SDLCALL SDL_ReadBE64(SDL_RWops *src); |
| 0 | 133 |
| 134 /* Write an item of native format to the specified endianness */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
135 extern DECLSPEC int SDLCALL SDL_WriteLE16(SDL_RWops *dst, Uint16 value); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
136 extern DECLSPEC int SDLCALL SDL_WriteBE16(SDL_RWops *dst, Uint16 value); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
137 extern DECLSPEC int SDLCALL SDL_WriteLE32(SDL_RWops *dst, Uint32 value); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
138 extern DECLSPEC int SDLCALL SDL_WriteBE32(SDL_RWops *dst, Uint32 value); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
139 extern DECLSPEC int SDLCALL SDL_WriteLE64(SDL_RWops *dst, Uint64 value); |
|
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
140 extern DECLSPEC int SDLCALL SDL_WriteBE64(SDL_RWops *dst, Uint64 value); |
| 0 | 141 |
| 142 | |
| 143 /* Ends C function definitions when using C++ */ | |
| 144 #ifdef __cplusplus | |
| 145 } | |
| 146 #endif | |
| 147 #include "close_code.h" | |
| 148 | |
| 149 #endif /* _SDL_endian_h */ |