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annotate README.QNX @ 4467:0baef09fe702

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author Eric Wing <ewing . public |-at-| gmail . com> Wed May 12 12:49:28 2010 -0700 (5 days ago) Added the automated test plist file and modified .hgignore to be less aggressive. Discovered that the new plist file for the automated test was not checked in because the .hgignore file was too aggressive. I changed the .hgignore to not ignore the Xcode directory and instead added a longer list of things to ignore.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 May 2010 23:13:33 -0700
parents 7c73d5b5a0d6
children
rev   line source
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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 HID input driver is finished.
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8
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9 ----------------------
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10 -- SDL QSA driver --
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11 ----------------------
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12
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13 Due to QNX Sound Architecture limitations software could not determine
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14 what playback channels are designed for, so some casus can be. For example,
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15 output after testmultiaudio test utility execution:
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16
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17 Using audio driver: qsa
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18 playing on device #0: ('Vortex 8820 @ fb000000 d0')...done.
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19 playing on device #1: ('Vortex 8820 @ fb000000 d1')...done.
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20 playing on device #2: ('i8x0 @ d800 d0')...done.
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21 playing on device #3: ('i8x0 @ d800 d1')...done.
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22 playing on all devices...
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23 Open device 3 failed: QSA: snd_pcm_channel_params failed: Invalid argument
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24
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25 If speakers are connected to both audio cards: Vortex 8820 and Intel
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26 Integrated Audio we can hear sound playback on device #0 and devices #2, #3
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27 only. Device #1 is an unknown PCM channel which does not produce any sound.
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28
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29 As for error during device #3 opening, it's caused by QSA software mixer
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30 channel, because it can't open real hardware device #2, since it's already
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31 opened by SDL.
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32
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33 After simultaneous sound playback on all devices utility testmultiaudio
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34 stays running waiting for sound playback finish on device #1, which is
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35 locked up due to some Aureal Vortex 8820 driver limitations.
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36
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37 ---------------------
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38 -- SDL GF driver --
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39 ---------------------
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40
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41 Here is an additional information about SDL GF driver:
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42 * 0. Introduction.
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43 * 1. Environment variables which SDL GF driver supports.
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44 * 2. Custom video modes.
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45 * 3. Limitations.
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46
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47 0. Introduction.
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48
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49 SDL GF driver is a layer between SDL and QNX Graphics Framework (GF).
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50 SDL GF driver also supports OpenGL ES through the QNX Graphics Framework.
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51 Hardware accelerated features which SDL can support depend on real hardware
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52 capabilities.
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53
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54 1. Environment variables which GF driver supports.
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55
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56 GF driver supports the following environment variables for QNX GF
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57 specific customization options:
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58 a) SDL_VIDEO_GF_REFRESH_RATE - refresh rate of video output in Hz.
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59 Without this environment variable declaration SDL controls refresh
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60 rate of your display. If this enironment variable is set to 0, SDL
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61 will control refresh rate of display, otherwise value of flag
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62 SDL_VIDEO_GF_REFRESH_RATE is used for all screen resolutions as
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63 refresh rate. This example will set 60Hz refresh rate as refresh rate
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64 for all graphics modes:
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65
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66 export SDL_VIDEO_GF_REFRESH_RATE=60
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67
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68 2. Custom video modes.
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69
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70 Since most QNX graphics drivers support GENERIC video modes, i.e. you
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71 can specify any horizontal and vertical resolution and any refresh rate,
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72 SDL GF driver uses its own fullscreen modes list, which can be incomplete.
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73 You can add any custom video mode, which your QNX graphics driver supports
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74 by editing file ./src/video/qnxgf/SDL_qnxgf.c. Custom graphics mode
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75 definition looks like this:
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76
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77 {0, 1024, 640, 60, NULL}, /* 1024x640 mode is 60Hz only */
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78
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79 You must specify horizontal resolution as the second parameter, vertical
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80 resolution as the third one and refresh rate as the fourth parameter.
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81 Please leave the first and the last parameters as 0 and NULL. Then send me
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82 your changes to e-mail address which is specified in the header of this
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83 document.
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84
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85 3. Limitations.
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86
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87 There are few limitations while using SDL GF driver:
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88
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89 a) Since GF driver supports fullscreen modes only, when flag
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90 SDL_WINDOW_FULLSCREEN is not specified, SDL GF driver will try to find the
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91 fullscreen graphics mode which corresponds to SDL window size. Refresh rate
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92 will be the lowest available, if SDL_VIDEO_GF_REFRESH_RATE environment
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93 variable is not set.
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94 b) As confirmed by QSSL none of existing video drivers has support of
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95 doublescan low-resolution video modes. So modes below 640x480 are not
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96 supported. If your video driver supports low-resolution video modes, please
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97 add SDL_GF_LOWRESOLUTION flag to the gf_devicename array in the SDL_qnxgf.c
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98 source file.
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99 c) Since GF framework supports hardware mouse cursor only, you'll get
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100 hardware mouse cursor in case of specific graphics driver supports it.
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101
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102 -------------------------
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103 -- SDL Photon driver --
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104 -------------------------
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105
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106 ----------------------------
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107 -- SDL HID input driver --
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108 ----------------------------