From Seven Kingdoms
Git repo
https://github.com/7k2/7k2
Compiling 7K2 with MSVC in Wine
- Wine 1.5.2
- Windows SDK 7.0 (installed via winetricks)
- DirectX SDK (April 2006)
- libjpeg 8c
- USE_FLIP isn’t supported in Wine (see http://wine.1045685.n5.nabble.com/DX6-more-compatibility-td1823921.html for a more technical discussion)
- Screen doesn’t redraw properly
- Need to define DEBUG and have a debug.sys file for game to work properly
- “SpyArray[] is deleted” occurs after a while when playing new games. It seems to be caused by an abnormally large value in inn_unit_count (14000+ to 24000+). The maximum value expected by the game is 12 (MAX_INN_UNIT).
- Cause: Accessing uninitialized variables (inn_unit_count in FirmInn and spy_count in UnitWagon) before
init_derived() is called.
- Fix/Workaround: Initialize them in the constructors.
- Need to add
GetInputState() to Sys::yield() for mouse to work in menus (see http://bugs.winehq.org/show_bug.cgi?id=8854#c48 )
- Need to compile with structure packing (/Zp) for tutorials to work
- JPEG decompression error when starting new campaign or viewing hall of fame
- Workaround: Specify default packing when including jpeglib.h
- Tutorial instructions don’t display
- Music and sound effects work
- When using ddr=opengl in Wine, there's a delay when clicking on buildings and units. Mouse movement is smooth, except when click-dragging. When ddr=gdi, mouse movement seems ok.
- No apparent issues with keyboard input (repeat rate seems ok)
- Multiplayer untested; needs native dplay dlls
- Cannot build non-English exe because of missing functions
- Screenshot: http://imgur.com/mrYza
- Download: sk2-wine-wip-toaster-20120320.exe
Compiling 7K2 with g++
- Debian wheezy/sid
- g++ 4.6.1-4
- Wine 1.5.2
- JWasm 2.04c
- binutils-2.21-5 (more recent versions of ld like 2.21.52.20110606 cause 7K2 to segfault at startup): 7k2.exe.so[3528]: segfault at 0 ip (null) sp bfb22e2c error 4
- Need to comment out functions that have inline asm in omagic.cpp, otherwise the game will hang when it tries to draw the lightning bolt
- Campaign works if calls to jpeg functions are commented out
7K2 tasks
- Convert inline asm to C++
- Convert external asm to C++
- Pack structures for binary compatibility
- Factor out code shared by 7kaa and 7k2
- Prepare for SDL+OpenAL backends
- Add OpenAL backend
- Add SDL backend
- Add SDL_net backend
- Fix 64-bit portability
- Add autoconf build system
- Add i18n support
7K2 SDL Port (WIP)
7K2 codebase notes
- MapMatrix::draw_map(): asm simply colors the minimap black. See it in action by enabling “world map unexplored” option.
- MapMatrix::disp(): Redraws minimap
- LocationCorners::render_special(Blob2DW *...): Draws a valid/invalid box on the map when placing a building
- LocationCorners::render_special(BitmapW *...): Called when “unexplored world map” option is on
- LocationCorners::render(BitmapW *...): Renders terrain
- draw_cubic_plane(): unused function
7kaa notes
- segfault when compiled with “-march=native”
bt:
in Town::update_resistance at OTOWN.cpp:1516
race_resistance_array[i][j] = (float) 0;
disas:
movaps %xmm0,(%edi)
info reg:
edi: 0x9c489b2
- Probable cause: unaligned access
- Workaround: Don’t pack Town class (breaks binary compatibility)
- SDL port: Black screenshot when debug enabled and debug.sys exists
- Cause: Wrong vga buffer used to save screenshot
- Fix/workaround: Use
vga_front instead of vga_true_front
- 7kaa_glsdl.patch
- no eol: resave in Vim
- last hunk rejected (vga_sdl.cpp): can be ignored
- no support for out-of-tree builds: Duplicate CXXFLAGS and rename CXXFLAGS to CFLAGS in configure.ac
- SDL 1.3 port
- SDL_NO_COMPAT
- not using 2D accelerated rendering
- unhandled events? 0x200, 0x1, 0x2, 0x4
- colors messed up (hall of fame, encyclopedia and credits)
- black screen when in fullscreen mode
