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annotate README.PicoGUI @ 1543:98f9b16f565c

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From: "Alex Volkov" Date: Thu, 10 Nov 2005 21:53:40 -0500 Subject: [SDL] BUG[?]: 32bpp RGBA->RGB colorkey blit, no SDL_SRCALPHA It seems there is either a documentation vs. reality mismatch or a real bug in SDL_blit_N.c:BlitNtoNKey(). The exact blit in question is a 32bpp RGBA->RGB, where RGBA has SDL_COLORKEY and *no* SDL_SRCALPHA flags. The doc in SDL_video.h states: * RGBA->RGB: * SDL_SRCALPHA not set: * copy RGB. * if SDL_SRCCOLORKEY set, only copy the pixels matching the * RGB values of the source colour key, ignoring alpha in the * comparison. BlitNtoNKey(), however, forgets to "ignore alpha in the comparison". The documentation makes perfect sense, so I think it is the code that is faulty. The attached patch corrects the code.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Mar 2006 15:43:15 +0000
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1 ========================
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2 Using SDL with PicoGUI
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3 ========================
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4
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5 - Originally contributed by Micah Dowty <micahjd@users.sourceforge.net>
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7 PicoGUI is a scalable GUI system with a unique architecture, primarily focused
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8 on scalability to various embedded systems. You can find more information
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9 including a FAQ at http://picogui.org
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11 To use the patch:
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13 1. When compiling, add the "--enable-video-picogui" switch to ./configure
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15 2. When running your program, ensure that the picogui driver for SDL
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16 is in use by setting the SDL_VIDEODRIVER environment variable
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17 to "picogui".
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19 3. The program must also be linked to the C client library for PicoGUI
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20 (libpgui.so). If the program is being compiled with a patched SDL
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21 installed this should be done automatically. If you want to use an
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22 existing binary with PicoGUI, you can set the LD_PRELOAD environment
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23 variable to the path of your libpgui.so file.
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24
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25 Capabilities:
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26
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27 So far only basic functionality is provided on true color (linear16/24/32)
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28 devices. Accessing a memory mapped bitmap, updating the display, and handling
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29 mouse/keyboard input. This functionality has been tested with several
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30 applications, including mplayer, Xine, sldroids, and Abuse.
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31
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32 TODO list:
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33
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34 - YUV overlays will be helpful for watching video on set top boxes or other
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35 embedded devices that have some graphics acceleration hardware
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36
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37 - Account for rotated bitmap storage in pgserver
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38
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39 - Support for hiding or changing the cursor
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40
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41 - The display should be centered when the SDL application is smaller
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42 than the PicoGUI panel
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43
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44 - Fullscreen or any other special modes
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45
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46 - Support for indexed and grayscale modes
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47
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48 - Probably much more...
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50 --- The End ---