Mercurial > sdl-ios-xcode
annotate README.Watcom @ 3100:7dc982143c06
Date: Sun, 22 Mar 2009 12:52:29 +0000
From: Luke Benstead
Subject: OpenGL 3.0 Context Creation
I've attached a patch which implements OpenGL 3.x context creation on
the latest SVN. I've added two options to SDL_GL_SetAttribute, these
are SDL_GL_CONTEXT_MAJOR_VERSION and SDL_GL_CONTEXT_MINOR_VERSION.
These default to 2 and 1 respectively. If the major version is less
than 3 then the current context creation method is used, otherwise the
appropriate new context creation function is called (depending on the
platform).
Sample code:
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); //Without these 2 lines, SDL will create a GL 2.x context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL | SDL_FULLSCREEN );
I've implemented context creation on both Win32 and X and run basic
tests on both. This patch doesn't provide access to all the options
allowed by the new context creation (e.g. shared contexts, forward
compatible contexts) but they can be added pretty easily.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 24 Mar 2009 10:43:53 +0000 |
| parents | 488eba319a25 |
| children | 8c72321542f6 |
| rev | line source |
|---|---|
| 1773 | 1 |
| 2 Using SDL under Windows with the OpenWatcom compiler | |
| 3 ==================================================== | |
| 4 | |
| 5 Prerequisites | |
| 6 ------------- | |
| 7 | |
| 8 I have done the port under Windows XP Home with SP2 installed. Windows | |
| 9 2000 should also be working. I'm not so sure about ancient Windows NT, | |
| 10 since only DirectX 3 is available there. Building should be possible, | |
| 11 but running the compiled applications will probalbly fail with | |
| 12 SDL_VIDEODRIVER=directx. The windib driver should work, though. | |
| 13 | |
| 14 To compile and use the SDL with Open Watcom you will need the following: | |
| 15 - Open Watcom compiler. I used version 1.5. The environment variables | |
| 16 PATH, WATCOM and INCLUDE need to be set appropriately - please consult | |
| 17 the OpenWatcom documentation and instructions given during the | |
| 18 installation of the compiler. | |
| 19 My setup looks like this in owvars.bat: | |
| 20 set WATCOM=C:\watcom | |
| 21 set INCLUDE=%WATCOM%\h;%WATCOM%\h\nt | |
| 22 set PATH=%PATH%;%WATCOM%\binnt;%WATCOM%\binw | |
| 23 - A fairly recent DirectX SDK. The original unmodified DX8 SDK works, as | |
| 24 well as the minimal DirectX 7 SDK from the Allegro download site | |
| 25 (<http://alleg.sourceforge.net/files/dx70_min.zip>). | |
| 26 - The SDL sources from Subversion | |
| 27 - The file Watcom-Win32.zip (now available in Subversion) | |
| 28 | |
| 29 | |
| 30 Building the Library | |
| 31 -------------------- | |
| 32 | |
| 33 1) In the SDL base directory extract the archive Watcom-Win32.zip. This | |
| 34 creates a subdirectory named 'watcom'. | |
| 35 2) The makefile expects the environment variable DXDIR to be set to the | |
| 36 base directory of a DirectX SDK. I have tried a stock DX8 SDK from | |
| 37 Microsoft as well as the minimal DirectX 7 SDK from the Allegro | |
| 38 download site. | |
| 39 You can also edit the makefile directly and hard code your path to | |
| 40 the SDK on your system. | |
| 41 I have this in my setup: | |
| 42 set DXDIR=D:\devel\DX8_SDK | |
| 43 3) Enter the watcom directory and run | |
| 44 wmake sdl | |
| 45 4) All tests from the test directory are working and can be built by | |
| 46 running | |
| 47 wmake tests | |
| 48 | |
| 49 Notes: | |
| 50 | |
| 51 The makefile offers some options to tweak the way the library is built. | |
| 52 You have at your disposal the option to build a static (default) | |
| 53 library, or a DLL (with tgt=dll). You can also choose whether to build | |
| 54 a Release (default) or a Debug version (with build=debug) of the tests | |
| 55 and library. Please consult the usage comment at the top of the | |
| 56 makefile for usage instructions. | |
| 57 | |
| 58 If you specify a test target (i.e. 'wmake tests' for all tests, or | |
| 59 selected targets like 'wmake testgl testvidinfo testoverlay2'), the | |
| 60 tests are always freshly compiled and linked. This is done to | |
| 61 minimise hassle when switching between library versions (static vs. | |
| 62 DLL), because they require subtly different options. | |
| 63 Also, the test executables are put directly into the test directory, | |
| 64 so they can find their data files. The clean target of the makefile | |
| 65 removes the test executables and the SDL.dll file from the test | |
| 66 directory. | |
| 67 | |
| 68 To use the library in your own projects with Open Watcom, you can use | |
| 69 the way the tests are built as base of your own build environment. | |
| 70 | |
|
1888
488eba319a25
------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] -------
Sam Lantinga <slouken@libsdl.org>
parents:
1773
diff
changeset
|
71 The library can also be built with the stack calling convention of the |
|
488eba319a25
------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] -------
Sam Lantinga <slouken@libsdl.org>
parents:
1773
diff
changeset
|
72 compiler (-6s instead of -6r). |
|
488eba319a25
------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] -------
Sam Lantinga <slouken@libsdl.org>
parents:
1773
diff
changeset
|
73 |
| 1773 | 74 |
| 75 Test applications | |
| 76 ----------------- | |
| 77 | |
| 78 I've tried to make all tests work. The following table gives an overview | |
| 79 of the current status. | |
| 80 | |
| 81 Testname Status | |
| 82 ~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
| 83 checkkeys + | |
| 84 graywin + | |
| 85 loopwave + | |
| 86 testalpha + | |
| 87 testbitmap + | |
| 88 testdyngl + | |
| 89 testerror + | |
| 90 testfile + | |
| 91 testgamma + | |
| 92 testgl + | |
| 93 testhread + | |
| 94 testiconv - (all failed) | |
| 95 testkeys + | |
| 96 testlock + | |
| 97 testoverlay + (needs 'set SDL_VIDEODRIVER=directx') | |
| 98 testoverlay2 + (needs 'set SDL_VIDEODRIVER=directx') | |
| 99 testpalette + | |
| 100 testplatform + | |
| 101 testsem + | |
| 102 testsprite + | |
| 103 testtimer + | |
| 104 testver + | |
| 105 testvidinfo + | |
|
1888
488eba319a25
------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] -------
Sam Lantinga <slouken@libsdl.org>
parents:
1773
diff
changeset
|
106 testwin ? (fading doesn't seem right) |
| 1773 | 107 testwm + |
| 108 torturethread + | |
| 109 testcdrom + | |
| 110 testjoystick not tested | |
| 111 threadwin + | |
|
1888
488eba319a25
------- Comment #5 From Marc Peter 2006-06-25 18:03 [reply] -------
Sam Lantinga <slouken@libsdl.org>
parents:
1773
diff
changeset
|
112 testcursor + |
| 1773 | 113 |
| 114 | |
| 115 TODO | |
| 116 ---- | |
| 117 | |
| 118 There is room for further improvement: | |
| 119 - Test joystick functionality. | |
| 120 - Investigate fading issue in 'testwin' test. | |
| 121 - Fix the UTF-8 support. | |
| 122 - Adapt the makefile/object file list to support more target systems | |
| 123 - Use "#pragma aux" syntax for the CPU info functions. | |
| 124 | |
| 125 | |
| 126 Questions and Comments | |
| 127 ---------------------- | |
| 128 | |
| 129 Please direct any questions or comments to me: <mailto:macpete@gmx.de> | |
| 130 | |
| 131 Happy Coding! | |
| 132 | |
| 133 Marc Peter |