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annotate README.QNX @ 3241:08c5964f2a34

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Fixed a few issues compiling with Mac OS X 10.6 Unfortunately the audio and cdrom systems do not build at all, and if you disable those, SDL still fails to link with these errors: Undefined symbols: "_OBJC_IVAR_$_NSScreen._frame", referenced from: -[NSScreen(NSScreenAccess) setFrame:] in SDL_cocoamodes.o "_KLGetKeyboardLayoutProperty", referenced from: _UpdateKeymap in SDL_cocoakeyboard.o _UpdateKeymap in SDL_cocoakeyboard.o "_KLGetCurrentKeyboardLayout", referenced from: _UpdateKeymap in SDL_cocoakeyboard.o ld: symbol(s) not found
author Sam Lantinga <slouken@libsdl.org>
date Sat, 05 Sep 2009 07:33:54 +0000
parents ec126b077b96
children 7c73d5b5a0d6
rev   line source
886
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1 README.QNX by Mike Gorchak <mike@malva.ua>, <lestat@i.com.ua>
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2 Last changed at 10 Jun 2009.
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3
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4 QNX Photon and GF drivers are being constructed, OpenGL ES support is
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5 finished. Still no 2D renderer support in GF and Photon drivers.
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6 QNX QSA (QNX Sound Architecture) driver is ready.
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7 QNX CDROM driver is ready.
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8 QNX HID input driver is finished.
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9
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10 ----------------------
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11 -- SDL QSA driver --
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12 ----------------------
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13
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14 Due to QNX Sound Architecture limitations software could not determine
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15 what playback channels are designed for, so some casus can be. For example,
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16 output after testmultiaudio test utility execution:
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17
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18 Using audio driver: qsa
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19 playing on device #0: ('Vortex 8820 @ fb000000 d0')...done.
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20 playing on device #1: ('Vortex 8820 @ fb000000 d1')...done.
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21 playing on device #2: ('i8x0 @ d800 d0')...done.
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22 playing on device #3: ('i8x0 @ d800 d1')...done.
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23 playing on all devices...
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24 Open device 3 failed: QSA: snd_pcm_channel_params failed: Invalid argument
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25
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26 If speakers are connected to both audio cards: Vortex 8820 and Intel
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27 Integrated Audio we can hear sound playback on device #0 and devices #2, #3
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28 only. Device #1 is an unknown PCM channel which does not produce any sound.
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29
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30 As for error during device #3 opening, it's caused by QSA software mixer
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31 channel, because it can't open real hardware device #2, since it's already
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32 opened by SDL.
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33
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34 After simultaneous sound playback on all devices utility testmultiaudio
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35 stays running waiting for sound playback finish on device #1, which is
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36 locked up due to some Aureal Vortex 8820 driver limitations.
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37
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38 ---------------------
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39 -- SDL GF driver --
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40 ---------------------
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41
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42 Here is an additional information about SDL GF driver:
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43 * 0. Introduction.
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44 * 1. Environment variables which SDL GF driver supports.
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45 * 2. Custom video modes.
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46 * 3. Limitations.
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47
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48 0. Introduction.
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49
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50 SDL GF driver is a layer between SDL and QNX Graphics Framework (GF).
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51 SDL GF driver also supports OpenGL ES through the QNX Graphics Framework.
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52 Hardware accelerated features which SDL can support depend on real hardware
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53 capabilities.
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54
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55 1. Environment variables which GF driver supports.
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56
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57 GF driver supports the following environment variables for QNX GF
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58 specific customization options:
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59 a) SDL_VIDEO_GF_REFRESH_RATE - refresh rate of video output in Hz.
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60 Without this environment variable declaration SDL controls refresh
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61 rate of your display. If this enironment variable is set to 0, SDL
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62 will control refresh rate of display, otherwise value of flag
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63 SDL_VIDEO_GF_REFRESH_RATE is used for all screen resolutions as
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64 refresh rate. This example will set 60Hz refresh rate as refresh rate
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65 for all graphics modes:
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66
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67 export SDL_VIDEO_GF_REFRESH_RATE=60
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68
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69 2. Custom video modes.
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70
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71 Since most QNX graphics drivers support GENERIC video modes, i.e. you
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72 can specify any horizontal and vertical resolution and any refresh rate,
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73 SDL GF driver uses its own fullscreen modes list, which can be incomplete.
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74 You can add any custom video mode, which your QNX graphics driver supports
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75 by editing file ./src/video/qnxgf/SDL_qnxgf.c. Custom graphics mode
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76 definition looks like this:
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77
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78 {0, 1024, 640, 60, NULL}, /* 1024x640 mode is 60Hz only */
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79
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80 You must specify horizontal resolution as the second parameter, vertical
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81 resolution as the third one and refresh rate as the fourth parameter.
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82 Please leave the first and the last parameters as 0 and NULL. Then send me
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83 your changes to e-mail address which is specified in the header of this
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84 document.
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85
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86 3. Limitations.
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87
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88 There are few limitations while using SDL GF driver:
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89
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90 a) Since GF driver supports fullscreen modes only, when flag
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91 SDL_WINDOW_FULLSCREEN is not specified, SDL GF driver will try to find the
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92 fullscreen graphics mode which corresponds to SDL window size. Refresh rate
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93 will be the lowest available, if SDL_VIDEO_GF_REFRESH_RATE environment
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94 variable is not set.
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95 b) As confirmed by QSSL none of existing video drivers has support of
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96 doublescan low-resolution video modes. So modes below 640x480 are not
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97 supported. If your video driver supports low-resolution video modes, please
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98 add SDL_GF_LOWRESOLUTION flag to the gf_devicename array in the SDL_qnxgf.c
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99 source file.
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100 c) Since GF framework supports hardware mouse cursor only, you'll get
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101 hardware mouse cursor in case of specific graphics driver supports it.
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102
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103 -------------------------
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104 -- SDL Photon driver --
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105 -------------------------
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106
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107 ----------------------------
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108 -- SDL HID input driver --
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109 ----------------------------