1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/wsys_w32.c	Tue Jun 28 13:52:02 2011 +0300
     1.3 @@ -0,0 +1,481 @@
     1.4 +/* SimplyGL window system module for Win32/WGL */
     1.5 +/* link-with: -lopengl32 */
     1.6 +
     1.7 +#include "config.h"
     1.8 +
     1.9 +#ifdef USE_WSYS_MODULE_W32
    1.10 +
    1.11 +#include <stdlib.h>
    1.12 +#include <assert.h>
    1.13 +#include <windows.h>
    1.14 +#include "sgl.h"
    1.15 +#include "wsys.h"
    1.16 +#include "log.h"
    1.17 +
    1.18 +struct window {
    1.19 +	int id;
    1.20 +	HWND win;
    1.21 +	HDC dc;
    1.22 +	HGLRC ctx;
    1.23 +	int width, height;
    1.24 +	int redisp_pending;
    1.25 +
    1.26 +	struct window *next;
    1.27 +};
    1.28 +
    1.29 +static int init(void);
    1.30 +static void shut_down(void);
    1.31 +
    1.32 +/* video mode switching */
    1.33 +static int set_vidmode(int xsz, int ysz);
    1.34 +static int get_vidmode(int *xsz, int *ysz);
    1.35 +
    1.36 +/* create/destroy windows */
    1.37 +static int create_window(int xsz, int ysz, unsigned int flags);
    1.38 +static void close_window(int id);
    1.39 +
    1.40 +/* window management */
    1.41 +static int set_active(int id);
    1.42 +static struct window *find_window(int id);
    1.43 +static struct window *find_window_handle(HWND wh);
    1.44 +static int activate_window(struct window *win);
    1.45 +static int set_title(const char *str);
    1.46 +static void redisplay(void);
    1.47 +static void swap_buffers(void);
    1.48 +
    1.49 +static int get_modifiers(void);
    1.50 +
    1.51 +/* event handling and friends */
    1.52 +static void set_bits(long *mask, long bits);
    1.53 +static void clear_bits(long *mask, long bits);
    1.54 +static void set_event(int idx, int enable);
    1.55 +static int process_events(void);
    1.56 +
    1.57 +static LRESULT CALLBACK handle_events(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);
    1.58 +static int mouse_button(unsigned int msg);
    1.59 +static void calc_win_size(int w, int h, int *width, int *height, int *posx, int *posy);
    1.60 +
    1.61 +
    1.62 +static struct wsys_module ws = {
    1.63 +	"win32", 0,
    1.64 +	init,
    1.65 +	shut_down,
    1.66 +	set_vidmode,
    1.67 +	get_vidmode,
    1.68 +	create_window,
    1.69 +	close_window,
    1.70 +	set_active,
    1.71 +	set_title,
    1.72 +	redisplay,
    1.73 +	swap_buffers,
    1.74 +	get_modifiers,
    1.75 +	set_event,
    1.76 +	process_events,
    1.77 +	0
    1.78 +};
    1.79 +
    1.80 +static struct window *winlist;
    1.81 +static struct window *active_win, *prev_active;
    1.82 +static int next_id = 1;
    1.83 +
    1.84 +/* this is the only exported function, everything else should be static */
    1.85 +void sgl_register_w32(void)
    1.86 +{
    1.87 +	sgl_register_module(&ws);
    1.88 +}
    1.89 +
    1.90 +
    1.91 +static int init(void)
    1.92 +{
    1.93 +	winlist = 0;
    1.94 +	active_win = prev_active = 0;
    1.95 +	return 0;
    1.96 +}
    1.97 +
    1.98 +static void shut_down(void)
    1.99 +{
   1.100 +	/* TODO */
   1.101 +}
   1.102 +
   1.103 +static int set_vidmode(int xsz, int ysz)
   1.104 +{
   1.105 +	DEVMODE dmode;
   1.106 +	memset(&dmode, 0, sizeof dmode);
   1.107 +	dmode.dmSize = sizeof dmode;
   1.108 +	/*dmode.dmBitsPerPel = 32;*/
   1.109 +	dmode.dmPelsWidth = xsz;
   1.110 +	dmode.dmPelsHeight = ysz;
   1.111 +	dmode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
   1.112 +
   1.113 +	if(ChangeDisplaySettings(&dmode, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL) {
   1.114 +		sgl_log("failed to set video mode: %dx%d\n", xsz, ysz);
   1.115 +		return -1;
   1.116 +	}
   1.117 +	return 0;
   1.118 +}
   1.119 +
   1.120 +static int get_vidmode(int *xsz, int *ysz)
   1.121 +{
   1.122 +	/* TODO */
   1.123 +	return 0;
   1.124 +}
   1.125 +
   1.126 +static int create_window(int xsz, int ysz, unsigned int flags)
   1.127 +{
   1.128 +	WNDCLASS wclass;
   1.129 +	int win_width, win_height, win_x, win_y;
   1.130 +	unsigned int style;
   1.131 +	HINSTANCE pid;
   1.132 +	HWND win;
   1.133 +	PIXELFORMATDESCRIPTOR fmt;
   1.134 +	int pf_id;
   1.135 +	struct window *wnode;
   1.136 +	void (*func)();
   1.137 +
   1.138 +	if(!(wnode = malloc(sizeof *wnode))) {
   1.139 +		return -1;
   1.140 +	}
   1.141 +
   1.142 +	pid = GetModuleHandle(0);
   1.143 +
   1.144 +	memset(&wclass, 0, sizeof wclass);
   1.145 +	wclass.style = CS_VREDRAW | CS_HREDRAW | CS_OWNDC;
   1.146 +	wclass.lpfnWndProc = handle_events;
   1.147 +	wclass.hInstance = pid;
   1.148 +	wclass.lpszClassName = "simplygl";
   1.149 +
   1.150 +	if(!RegisterClass(&wclass)) {
   1.151 +		sgl_log("failed to register window class\n");
   1.152 +		return -1;
   1.153 +	}
   1.154 +
   1.155 +	calc_win_size(xsz, ysz, &win_width, &win_height, &win_x, &win_y);
   1.156 +
   1.157 +	style = WS_BORDER | WS_CAPTION | WS_MINIMIZEBOX | WS_POPUP | WS_SYSMENU | WS_VISIBLE;
   1.158 +
   1.159 +	if(!(win = CreateWindow("simplygl", "OpenGL/Win32", style, win_x, win_y, win_width, win_height, 0, 0, pid, 0))) {
   1.160 +		sgl_log("failed to create window\n");
   1.161 +		return -1;
   1.162 +	}
   1.163 +
   1.164 +	ShowWindow(win, SW_SHOW);
   1.165 +	SetForegroundWindow(win);
   1.166 +	SetActiveWindow(win);
   1.167 +
   1.168 +	wnode->win = win;
   1.169 +	wnode->dc = GetDC(win);
   1.170 +
   1.171 +	memset(&fmt, 0, sizeof fmt);
   1.172 +	fmt.nSize = sizeof fmt;
   1.173 +	fmt.nVersion = 1;
   1.174 +	fmt.cColorBits = PFD_TYPE_RGBA;
   1.175 +	fmt.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
   1.176 +
   1.177 +	if(flags & SGL_DOUBLE) {
   1.178 +		fmt.dwFlags |= PFD_DOUBLEBUFFER;
   1.179 +	}
   1.180 +	if(flags & SGL_DEPTH) {
   1.181 +		fmt.cDepthBits = 24;
   1.182 +	}
   1.183 +	if(flags & SGL_STENCIL) {
   1.184 +		fmt.cStencilBits = 8;
   1.185 +	}
   1.186 +	/* TODO: more... */
   1.187 +
   1.188 +	if(!(pf_id = ChoosePixelFormat(wnode->dc, &fmt))) {
   1.189 +		sgl_log("can't find requested pixel format\n");
   1.190 +		return -1;
   1.191 +	}
   1.192 +	if(!SetPixelFormat(wnode->dc, pf_id, &fmt)) {
   1.193 +		sgl_log("failed to set pixel format\n");
   1.194 +		return -1;
   1.195 +	}
   1.196 +	if(!(wnode->ctx = wglCreateContext(wnode->dc))) {
   1.197 +		sgl_log("failed to create OpenGL context\n");
   1.198 +		return -1;
   1.199 +	}
   1.200 +
   1.201 +	wnode->id = next_id++;
   1.202 +	wnode->width = xsz;
   1.203 +	wnode->height = ysz;
   1.204 +	wnode->redisp_pending = 1;
   1.205 +	wnode->next = winlist;
   1.206 +	winlist = wnode;
   1.207 +
   1.208 +	if(!active_win) {
   1.209 +		set_active(wnode->id);
   1.210 +	} else {
   1.211 +		activate_window(wnode);
   1.212 +	}
   1.213 +
   1.214 +	if((func = sgl_get_callback(SGL_CREATE))) {
   1.215 +		func(wnode->id);
   1.216 +	}
   1.217 +	if((func = sgl_get_callback(SGL_RESHAPE))) {
   1.218 +		func(xsz, ysz);
   1.219 +	}
   1.220 +	activate_window(prev_active);
   1.221 +	return wnode->id;
   1.222 +}
   1.223 +
   1.224 +static void close_window(int id)
   1.225 +{
   1.226 +	struct window dummy, *win, *prev;
   1.227 +	sgl_close_callback_t close_func;
   1.228 +
   1.229 +	dummy.next = winlist;
   1.230 +
   1.231 +	prev = &dummy;
   1.232 +	win = prev->next;
   1.233 +
   1.234 +	while(win) {
   1.235 +		if(win->id == id) {
   1.236 +			if((close_func = sgl_get_callback(SGL_CLOSE))) {
   1.237 +				close_func(id);
   1.238 +			}
   1.239 +			wglDeleteContext(win->ctx);
   1.240 +			ReleaseDC(win->win, win->dc);
   1.241 +			DestroyWindow(win->win);
   1.242 +
   1.243 +			prev->next = win->next;
   1.244 +			free(win);
   1.245 +			return;
   1.246 +		}
   1.247 +		prev = win;
   1.248 +		win = win->next;
   1.249 +	}
   1.250 +}
   1.251 +
   1.252 +static int set_active(int id)
   1.253 +{
   1.254 +	struct window *win = find_window(id);
   1.255 +	if(!win) {
   1.256 +		sgl_log("no such window: %d\n", id);
   1.257 +		return -1;
   1.258 +	}
   1.259 +	/* only the user calls this, so don't revert this selection */
   1.260 +	prev_active = win;
   1.261 +	return activate_window(win);
   1.262 +}
   1.263 +
   1.264 +static struct window *find_window(int id)
   1.265 +{
   1.266 +	struct window *win = winlist;
   1.267 +
   1.268 +	while(win) {
   1.269 +		if(win->id == id) {
   1.270 +			return win;
   1.271 +		}
   1.272 +		win = win->next;
   1.273 +	}
   1.274 +	return 0;
   1.275 +}
   1.276 +
   1.277 +static struct window *find_window_handle(HWND wh)
   1.278 +{
   1.279 +	struct window *win = winlist;
   1.280 +
   1.281 +	while(win) {
   1.282 +		if(win->win == wh) {
   1.283 +			return win;
   1.284 +		}
   1.285 +		win = win->next;
   1.286 +	}
   1.287 +	return 0;
   1.288 +}
   1.289 +
   1.290 +static int activate_window(struct window *win)
   1.291 +{
   1.292 +	if(!wglMakeCurrent(win->dc, win->ctx)) {
   1.293 +		sgl_log("failed to activate window %d\n", (int)win->id);
   1.294 +		return -1;
   1.295 +	}
   1.296 +	active_win = win;
   1.297 +	return 0;
   1.298 +}
   1.299 +
   1.300 +static int set_title(const char *str)
   1.301 +{
   1.302 +	SetWindowText(active_win->win, str);
   1.303 +	return 0;
   1.304 +}
   1.305 +
   1.306 +static void redisplay(void)
   1.307 +{
   1.308 +	InvalidateRect(active_win->win, 0, 0);
   1.309 +}
   1.310 +
   1.311 +static void swap_buffers(void)
   1.312 +{
   1.313 +	SwapBuffers(active_win->dc);
   1.314 +}
   1.315 +
   1.316 +static int get_modifiers(void)
   1.317 +{
   1.318 +	return 0;	/* TODO */
   1.319 +}
   1.320 +
   1.321 +static void set_event(int idx, int enable)
   1.322 +{
   1.323 +	/* not needed */
   1.324 +}
   1.325 +
   1.326 +static int process_events(void)
   1.327 +{
   1.328 +	int ret = 0;
   1.329 +	MSG msg;
   1.330 +	sgl_idle_callback_t idle;
   1.331 +
   1.332 +	idle = sgl_get_callback(SGL_IDLE);
   1.333 +
   1.334 +	prev_active = active_win;
   1.335 +
   1.336 +	if(!idle) {
   1.337 +		if(!GetMessage(&msg, 0, 0, 0)) {
   1.338 +			ret = -1;
   1.339 +			goto end;
   1.340 +		}
   1.341 +	} else {
   1.342 +		if(!PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) {
   1.343 +			ret = 0;
   1.344 +			goto end;
   1.345 +		}
   1.346 +	}
   1.347 +
   1.348 +	do {
   1.349 +		if(msg.message == WM_QUIT) {
   1.350 +			ret = -1;
   1.351 +			break;
   1.352 +		}
   1.353 +		TranslateMessage(&msg);
   1.354 +		DispatchMessage(&msg);
   1.355 +	} while(PeekMessage(&msg, 0, 0, 0, PM_REMOVE));
   1.356 +
   1.357 +end:
   1.358 +	if(ret != -1 && idle) {
   1.359 +		idle();
   1.360 +	}
   1.361 +	activate_window(prev_active);
   1.362 +	return ret;
   1.363 +}
   1.364 +
   1.365 +static LRESULT CALLBACK handle_events(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
   1.366 +{
   1.367 +	static int state;
   1.368 +	struct window *win;
   1.369 +	void (*func)();
   1.370 +
   1.371 +	if((win = find_window_handle(hwnd))) {
   1.372 +		activate_window(win);
   1.373 +	} else {
   1.374 +		return DefWindowProc(hwnd, msg, wparam, lparam);
   1.375 +	}
   1.376 +
   1.377 +	switch(msg) {
   1.378 +	case WM_PAINT:
   1.379 +		if((func = sgl_get_callback(SGL_DISPLAY))) {
   1.380 +			func();
   1.381 +		}
   1.382 +		ValidateRect(hwnd, 0);
   1.383 +		break;
   1.384 +
   1.385 +	case WM_KEYDOWN:
   1.386 +	case WM_KEYUP:
   1.387 +		if((func = sgl_get_callback(SGL_KEYBOARD))) {
   1.388 +			func(MapVirtualKey(wparam, 2), msg == WM_KEYDOWN);
   1.389 +		}
   1.390 +		break;
   1.391 +
   1.392 +	case WM_LBUTTONDOWN:
   1.393 +	case WM_RBUTTONDOWN:
   1.394 +	case WM_MBUTTONDOWN:
   1.395 +		if(1) {
   1.396 +			state++;
   1.397 +		} else {
   1.398 +	case WM_LBUTTONUP:
   1.399 +	case WM_RBUTTONUP:
   1.400 +	case WM_MBUTTONUP:
   1.401 +			state--;
   1.402 +		}
   1.403 +		assert(state >= 0);
   1.404 +		if((func = sgl_get_callback(SGL_MOUSE))) {
   1.405 +			func(mouse_button(msg), state, LOWORD(lparam), HIWORD(lparam));
   1.406 +		}
   1.407 +		break;
   1.408 +
   1.409 +	case WM_MOUSEMOVE:
   1.410 +		if(state) {
   1.411 +			func = sgl_get_callback(SGL_MOTION);
   1.412 +		} else {
   1.413 +			func = sgl_get_callback(SGL_PASSIVE);
   1.414 +		}
   1.415 +		if(func) {
   1.416 +			func(LOWORD(lparam), HIWORD(lparam));
   1.417 +		}
   1.418 +		break;
   1.419 +
   1.420 +	default:
   1.421 +		return DefWindowProc(hwnd, msg, wparam, lparam);
   1.422 +	}
   1.423 +	return 0;
   1.424 +}
   1.425 +
   1.426 +static int mouse_button(unsigned int msg)
   1.427 +{
   1.428 +	switch(msg) {
   1.429 +	case WM_LBUTTONDOWN:
   1.430 +	case WM_LBUTTONUP:
   1.431 +		return SGL_LEFT_BUTTON;
   1.432 +
   1.433 +	case WM_RBUTTONDOWN:
   1.434 +	case WM_RBUTTONUP:
   1.435 +		return SGL_RIGHT_BUTTON;
   1.436 +
   1.437 +	case WM_MBUTTONDOWN:
   1.438 +	case WM_MBUTTONUP:
   1.439 +		return SGL_MIDDLE_BUTTON;
   1.440 +
   1.441 +	default:
   1.442 +		break;
   1.443 +	}
   1.444 +	return -1;
   1.445 +}
   1.446 +
   1.447 +static void calc_win_size(int w, int h, int *width, int *height, int *posx, int *posy)
   1.448 +{
   1.449 +	RECT rect;
   1.450 +	DEVMODE dmode;
   1.451 +	unsigned int style = WS_BORDER | WS_CAPTION | WS_MINIMIZEBOX | WS_POPUP | WS_SYSMENU | WS_VISIBLE;
   1.452 +
   1.453 +	rect.left = rect.top = 0;
   1.454 +	rect.right = w;
   1.455 +	rect.bottom = h;
   1.456 +
   1.457 +	AdjustWindowRect(&rect, style, 0);
   1.458 +
   1.459 +	*width = rect.right - rect.left;
   1.460 +	*height = rect.bottom - rect.top;
   1.461 +
   1.462 +	*posx = *posy = 0;
   1.463 +
   1.464 +	memset(&dmode, 0, sizeof dmode);
   1.465 +	dmode.dmSize = sizeof dmode;
   1.466 +
   1.467 +	if(EnumDisplaySettings(0, ENUM_CURRENT_SETTINGS, &dmode)) {
   1.468 +		int x, y;
   1.469 +
   1.470 +		x = (dmode.dmPelsWidth - *width) / 2;
   1.471 +		if(x > 0) {
   1.472 +			*posx = x;
   1.473 +		}
   1.474 +
   1.475 +		y = (dmode.dmPelsHeight - *height) / 2;
   1.476 +		if(y > 0) {
   1.477 +			*posy = y;
   1.478 +		}
   1.479 +	}
   1.480 +}
   1.481 +
   1.482 +#else
   1.483 +int sgl_wsys_w32_silence_the_fucking_empty_file_warnings;
   1.484 +#endif