README.Epoc
author Patrice Mandin <patmandin@gmail.com>
Thu, 19 Jan 2006 21:28:52 +0000
changeset 1257 448a9a64537b
parent 250 74a8f672f2f8
permissions -rw-r--r--
[PATCH] SDL_GetVideoMode() does not find best mode, part 2

Following commit 1.51, I come accross a problem when SDL must choose between
several video modes that could suit the one asked.

If I ask 320x240 with this list:
768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200

The smallest selectables modes are 384x240 and 320x400. And SDL choose the later
in this list, but 384x240 is more suitable. So I added a check to compare
the pixel count (surface) of modes, and select the one which has the smallest
pixel count.

In my example, 384x240 has 92160 pixels, and 320x400 has 128000 pixels. So now
SDL will choose 384x240 for the asked 320x240 mode.
     1 
     2 ==============================================================================
     3 Using the Simple DirectMedia Layer with EPOC/SymbianOS 6.0
     4 ==============================================================================
     5 
     6 ==============================================================================
     7 I.  Building the Simple DirectMedia Layer libraries:
     8 
     9   You can get Symbian SDK from: 
    10     http://www.symbian.com.
    11  
    12   First create "Epoc" directory under SDL main directory and unpack 
    13   EpocBuildFiles.zip in it.
    14    
    15   To build the librarys goto "epoc" directory and type:
    16     bldmake bldfiles
    17     abld makefile vc6 (for creating Microsoft Visual C++ makefiles)
    18     abld build wins udeb (building for wins emulator)
    19     abld build armi urel (building for real device)
    20 
    21 ==============================================================================
    22 II. Building the Simple DirectMedia Layer programs:
    23 
    24   Building SDL test programs is easy once you have built the libraries:
    25     abld test build wins udeb
    26     abld test build armi urel
    27 
    28   Supported real screen resolutions
    29     320 x 200 x  8 bit
    30     320 x 200 x 12 bit
    31     640 x 200 x  8 bit
    32     640 x 200 x 12 bit
    33   Supported "emulated" screen resolutions 
    34     640 x 400 x  8 bit
    35     640 x 400 x 12 bit
    36     640 x 480 x  8 bit
    37     640 x 480 x 12 bit
    38   "Emulated" resolutions are implemented by by shrinking the screen vertically 
    39   i.e. only every second scanline is drawn. This is mainly ment to be used for 
    40   testing quick ports of programs. Using faked resolutions is a waste of memory 
    41   and cpu power!
    42 
    43 ==============================================================================
    44 III. Running test programs
    45 
    46   Copy executable to the device and run it from the File manager.   The Esc 
    47   key quits demo programs. In Crystal, Exe programs do not appear in task list 
    48   nor in Extras :-(. Test programs are tested in Nokia 9210 Communicator.
    49 
    50   Special keys used in SDL:
    51     The Caps lock key enables or disables the virtual cursor. 
    52     Function keys are mapped as follows: 
    53     F1=chr+q, F2=chr+w,..., F8=chr+i, 
    54     F9=chr+a,..., F12=chr+d.
    55 
    56 ==============================================================================
    57 IV.  Enjoy! :)
    58 
    59   If you have a project you'd like me to know about, or want to ask questions,
    60   go ahead and join the SDL developer's mailing list by sending e-mail to:
    61 
    62 	sdl-request@libsdl.org
    63 
    64   and put "subscribe" into the subject of the message. Or alternatively you
    65   can use the web interface:
    66 
    67 	http://www.libsdl.org/mailman/listinfo/sdl
    68 
    69   You can find more info about Epoc version of SDL from Hannu Viitala's 
    70   homepage
    71     http://www.mbnet.fi/~haviital
    72   
    73 ==============================================================================
    74 
    75