digitalmars.D - *trying* to starting using D
I'm new to D, and I'm trying to port a very small win32 opengl app (~100 lines) from C++ to D but the bindings just don't seem up to it... Firstly a significant portion of wingdi.h seems to be missing from the default windows bindings which come with phobos, enough to make initialising an opengl context impossible. Eventually I found the bindings project - "http://www.dsource.org/projects/bindings" - which appears to have the relevant definitions but compilation still fails with a series of errors such as "Error 42: Symbol Undefined _ChoosePixelFormat 8" I assume this is a linker problem but I have no idea what I'm supposed to link in, and only a rough idea of how I'd actually do it? The opengl bindings from that same binding project seem to be written for an old version of D as they don't compile. I replaced all the "typedef"s with "alias" and moved it into a directory named "c" to match the module name and that seemed to work although I then got more errors like above. I found the opengl bindings in "derelict" but that has too many dependencies for my liking.
Apr 19 2013
kraybit <stdin kraybit.com> On 4/20/13 01:40 , Diggory wrote:I'm new to D, and I'm trying to port a very small win32 opengl app (~100 lines) from C++ to D but the bindings just don't seem up to it... [...]I don't know if I can help, but would it be possible to post the code you have so far? (I believe something like http://pastebin.com is preferred.) /k
Apr 19 2013
On Friday, 19 April 2013 at 23:40:58 UTC, Diggory wrote:I found the opengl bindings in "derelict" but that has too many dependencies for my liking.The dsource website confuses people new to D, it's not maintained anymore and applies to the D1 era. For some reason it just won't go away. I think derelict is your best bet right now, however look in here for recent bindings that may apply. https://github.com/D-Programming-Deimos Finally, you should post questions like this in the D learn section http://forum.dlang.org/group/digitalmars.D.learn --rt
Apr 19 2013
Ah I didn't see that board, could a moderator move this please?
The problem is that neither "derelict" or "deimos" define a
specific "windows" binding. "deimos" has some parts of the
windows api in "wintypes.d" but it conflicts with the built in
windows api.
When importing under an alias, aside from the obvious downside of
having two copies of certain structures which are not
interchangeable (eg. PIXELFORMATDESCRIPTOR) some of the necessary
functions are still not declared in either (eg. SetPixelFormat)
Here's my original C++ code, the idea is that I can compile this
code into a static library, and then I can link some platform
independent code into it which defines "gloopMain()" and start
making opengl calls to draw stuff. To get it to run on linux all
I have to do is link against the linux version. It's pretty
similar to GLUT except it works the way I want...
Header
[code]
enum GloopFlags {
gloop_fullScreen = 1,
gloop_resizable = 2,
gloop_depthBuffer = 4
};
struct GloopParams {
int x, y, width, height;
LPCTSTR title;
int flags;
};
extern GloopParams gloopParams;
void gloopMain();
#define GLOOP(x, y, w, h, title, flags) GloopParams gloopParams =
{x, y, w, h, title, flags}; void gloopMain()
bool GloopLoop();
[/code]
Source
[code]
#include "stdafx.h"
#include "Gloop.h"
#define CLASS_NAME _T("GloopWindow")
HDC hdc = 0;
bool GloopLoop() {
SwapBuffers(hdc);
Sleep(0);
MSG msg;
while (PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE)) {
switch (msg.message) {
case WM_QUIT:
return false;
default:
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return true;
}
LRESULT CALLBACK wndProc(HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam) {
switch (message) {
case WM_SIZE:
glViewport(0, 0, LOWORD(lParam), HIWORD(lParam));
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
bool setupPixelFormat(HDC hdc)
{
PIXELFORMATDESCRIPTOR pfd, *ppfd;
int pixelformat;
ppfd = &pfd;
ppfd->nSize = sizeof(PIXELFORMATDESCRIPTOR);
ppfd->nVersion = 1;
ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER;
ppfd->dwLayerMask = PFD_MAIN_PLANE;
ppfd->iPixelType = PFD_TYPE_RGBA;
ppfd->cColorBits = 24;
ppfd->cDepthBits = (gloopParams.flags & gloop_depthBuffer) ? 16
: 0;
ppfd->cAccumBits = 0;
ppfd->cStencilBits = 0;
pixelformat = ChoosePixelFormat(hdc, ppfd);
if ( (pixelformat = ChoosePixelFormat(hdc, ppfd)) == 0 ) {
MessageBox(NULL, _T("ChoosePixelFormat failed"), _T("Error"),
MB_OK);
return false;
}
if (SetPixelFormat(hdc, pixelformat, ppfd) == FALSE) {
MessageBox(NULL, _T("SetPixelFormat failed"), _T("Error"),
MB_OK);
return false;
}
return true;
}
int APIENTRY WinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
WNDCLASSEX wndClass = {0};
wndClass.cbSize = sizeof(wndClass);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = &wndProc;
wndClass.lpszClassName = CLASS_NAME;
wndClass.hCursor = LoadCursor(nullptr, IDC_ARROW);
RegisterClassEx(&wndClass);
DWORD styles =
WS_OVERLAPPED|WS_CLIPCHILDREN|WS_CLIPSIBLINGS|WS_VISIBLE;
if (gloopParams.flags & gloop_resizable)
styles |= WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
if (gloopParams.flags & gloop_fullScreen)
styles |= WS_MAXIMIZE | WS_POPUP;
else
styles |= WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU;
RECT rc = {
gloopParams.x, gloopParams.y,
gloopParams.x + gloopParams.width, gloopParams.y +
gloopParams.height
};
AdjustWindowRectEx(&rc, styles, FALSE, 0);
HWND hwnd = CreateWindowEx(
0,
CLASS_NAME,
gloopParams.title,
styles,
rc.left,
rc.top,
rc.right - rc.left,
rc.bottom - rc.top,
nullptr,
nullptr,
hInstance,
nullptr
);
hdc = GetDC(hwnd);
if (!setupPixelFormat(hdc))
return 0;
HGLRC hrc = wglCreateContext(hdc);
wglMakeCurrent(hdc, hrc);
gloopMain();
return 0;
}
[/code]
(no idea if these code tags will work...)
Apr 19 2013
On Saturday, 20 April 2013 at 00:44:20 UTC, Diggory wrote:Ah I didn't see that board, could a moderator move this please?This forum is actually a news group run through the nntp system and as such there's no moderator and no way to move a thread. Your best bet for answers it to repost in d.learn.The problem is that neither "derelict" or "deimos" define a specific "windows" binding. "deimos" has some parts of the windows api in "wintypes.d" but it conflicts with the built in windows api.You may also get some answers in the derelict forums http://dblog.aldacron.net/forum/index.php --rt
Apr 19 2013