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source: OGRE/trunk/ogrenew/RenderSystems/GL/src/OgreWin32GLSupport.cpp @ 657

Revision 657, 15.8 KB checked in by mattausch, 19 years ago (diff)
added ogre dependencies and patched ogre sources

Line
1	#include "OgreRoot.h"
2	#include "OgreException.h"
3	#include "OgreLogManager.h"
4	#include "OgreStringConverter.h"
5
6	#include <algorithm>
7
8	#include "OgreWin32GLSupport.h"
9	#include "OgreGLTexture.h"
10	#include "OgreWin32Window.h"
11
12	#define HW_RTT
13
14	#ifdef HW_RTT
15	#include "OgreWin32RenderTexture.h"
16	#endif
17
18	using namespace Ogre;
19
20	namespace Ogre {
21	Win32GLSupport::Win32GLSupport():
22	mInitialWindow(0), mHasPixelFormatARB(0)
23	{
24	// immediately test WGL_ARB_pixel_format and FSAA support
25	// so we can set configuration options appropriately
26	initialiseWGL();
27	}
28
29	template<class C> void remove_duplicates(C& c)
30	{
31	std::sort(c.begin(), c.end());
32	typename C::iterator p = std::unique(c.begin(), c.end());
33	c.erase(p, c.end());
34	}
35
36	void Win32GLSupport::addConfig()
37	{
38	//TODO: EnumDisplayDevices http://msdn.microsoft.com/library/en-us/gdi/devcons_2303.asp
39	/*vector<string> DisplayDevices;
40	DISPLAY_DEVICE DisplayDevice;
41	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
42	DWORD i=0;
43	while (EnumDisplayDevices(NULL, i++, &DisplayDevice, 0) {
44	DisplayDevices.push_back(DisplayDevice.DeviceName);
45	}*/
46
47	ConfigOption optFullScreen;
48	ConfigOption optVideoMode;
49	ConfigOption optColourDepth;
50	ConfigOption optDisplayFrequency;
51	ConfigOption optVSync;
52	ConfigOption optFSAA;
53
54	// FS setting possiblities
55	optFullScreen.name = "Full Screen";
56	optFullScreen.possibleValues.push_back("Yes");
57	optFullScreen.possibleValues.push_back("No");
58	optFullScreen.currentValue = "Yes";
59	optFullScreen.immutable = false;
60
61	// Video mode possiblities
62	DEVMODE DevMode;
63	DevMode.dmSize = sizeof(DEVMODE);
64	optVideoMode.name = "Video Mode";
65	optVideoMode.immutable = false;
66	for (DWORD i = 0; EnumDisplaySettings(NULL, i, &DevMode); ++i)
67	{
68	if (DevMode.dmBitsPerPel < 16 \|\| DevMode.dmPelsHeight < 480)
69	continue;
70	mDevModes.push_back(DevMode);
71	char szBuf[16];
72	snprintf(szBuf, 16, "%d x %d", DevMode.dmPelsWidth, DevMode.dmPelsHeight);
73	optVideoMode.possibleValues.push_back(szBuf);
74	}
75	remove_duplicates(optVideoMode.possibleValues);
76	optVideoMode.currentValue = optVideoMode.possibleValues.front();
77
78	optColourDepth.name = "Colour Depth";
79	optColourDepth.immutable = false;
80	optColourDepth.currentValue = "";
81
82	optDisplayFrequency.name = "Display Frequency";
83	optDisplayFrequency.immutable = false;
84	optDisplayFrequency.currentValue = "";
85
86	optVSync.name = "VSync";
87	optVSync.immutable = false;
88	optVSync.possibleValues.push_back("No");
89	optVSync.possibleValues.push_back("Yes");
90	optVSync.currentValue = "No";
91
92	optFSAA.name = "FSAA";
93	optFSAA.immutable = false;
94	optFSAA.possibleValues.push_back("0");
95	for (std::vector<int>::iterator it = mFSAALevels.begin(); it != mFSAALevels.end(); ++it)
96	optFSAA.possibleValues.push_back(StringConverter::toString(*it));
97	optFSAA.currentValue = "0";
98
99	mOptions[optFullScreen.name] = optFullScreen;
100	mOptions[optVideoMode.name] = optVideoMode;
101	mOptions[optColourDepth.name] = optColourDepth;
102	mOptions[optDisplayFrequency.name] = optDisplayFrequency;
103	mOptions[optVSync.name] = optVSync;
104	mOptions[optFSAA.name] = optFSAA;
105
106	refreshConfig();
107	}
108
109	void Win32GLSupport::refreshConfig()
110	{
111	ConfigOptionMap::iterator optVideoMode = mOptions.find("Video Mode");
112	ConfigOptionMap::iterator moptColourDepth = mOptions.find("Colour Depth");
113	ConfigOptionMap::iterator moptDisplayFrequency = mOptions.find("Display Frequency");
114	if(optVideoMode == mOptions.end() \|\| moptColourDepth == mOptions.end() \|\| moptDisplayFrequency == mOptions.end())
115	OGRE_EXCEPT(999, "Can't find mOptions!", "Win32GLSupport::refreshConfig");
116	ConfigOption* optColourDepth = &moptColourDepth->second;
117	ConfigOption* optDisplayFrequency = &moptDisplayFrequency->second;
118
119	const String& val = optVideoMode->second.currentValue;
120	String::size_type pos = val.find('x');
121	if (pos == String::npos)
122	OGRE_EXCEPT(999, "Invalid Video Mode provided", "Win32GLSupport::refreshConfig");
123	DWORD width = StringConverter::parseUnsignedInt(val.substr(0, pos));
124	DWORD height = StringConverter::parseUnsignedInt(val.substr(pos+1, String::npos));
125
126	for(std::vector<DEVMODE>::const_iterator i = mDevModes.begin(); i != mDevModes.end(); ++i)
127	{
128	if (i->dmPelsWidth != width \|\| i->dmPelsHeight != height)
129	continue;
130	optColourDepth->possibleValues.push_back(StringConverter::toString(i->dmBitsPerPel));
131	optDisplayFrequency->possibleValues.push_back(StringConverter::toString(i->dmDisplayFrequency));
132	}
133	remove_duplicates(optColourDepth->possibleValues);
134	remove_duplicates(optDisplayFrequency->possibleValues);
135	optColourDepth->currentValue = optColourDepth->possibleValues.back();
136	if (optDisplayFrequency->currentValue != "N/A")
137	optDisplayFrequency->currentValue = optDisplayFrequency->possibleValues.front();
138	}
139
140	void Win32GLSupport::setConfigOption(const String &name, const String &value)
141	{
142	ConfigOptionMap::iterator it = mOptions.find(name);
143
144	// Update
145	if(it != mOptions.end())
146	it->second.currentValue = value;
147	else
148	{
149	StringUtil::StrStreamType str;
150	str << "Option named '" << name << "' does not exist.";
151	OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS, str.str(), "Win32GLSupport::setConfigOption" );
152	}
153
154	if( name == "Video Mode" )
155	refreshConfig();
156
157	if( name == "Full Screen" )
158	{
159	it = mOptions.find( "Display Frequency" );
160	if( value == "No" )
161	{
162	it->second.currentValue = "N/A";
163	it->second.immutable = true;
164	}
165	else
166	{
167	it->second.currentValue = it->second.possibleValues.front();
168	it->second.immutable = false;
169	}
170	}
171	}
172
173	String Win32GLSupport::validateConfig()
174	{
175	// TODO, DX9
176	return String("");
177	}
178
179	RenderWindow* Win32GLSupport::createWindow(bool autoCreateWindow, GLRenderSystem* renderSystem, const String& windowTitle)
180	{
181	if (autoCreateWindow)
182	{
183	ConfigOptionMap::iterator opt = mOptions.find("Full Screen");
184	if (opt == mOptions.end())
185	OGRE_EXCEPT(999, "Can't find full screen options!", "Win32GLSupport::createWindow");
186	bool fullscreen = (opt->second.currentValue == "Yes");
187
188	opt = mOptions.find("Video Mode");
189	if (opt == mOptions.end())
190	OGRE_EXCEPT(999, "Can't find video mode options!", "Win32GLSupport::createWindow");
191	String val = opt->second.currentValue;
192	String::size_type pos = val.find('x');
193	if (pos == String::npos)
194	OGRE_EXCEPT(999, "Invalid Video Mode provided", "Win32GLSupport::createWindow");
195
196	unsigned int w = StringConverter::parseUnsignedInt(val.substr(0, pos));
197	unsigned int h = StringConverter::parseUnsignedInt(val.substr(pos + 1));
198
199	// Parse optional parameters
200	NameValuePairList winOptions;
201	opt = mOptions.find("Colour Depth");
202	if (opt == mOptions.end())
203	OGRE_EXCEPT(999, "Can't find Colour Depth options!", "Win32GLSupport::createWindow");
204	unsigned int colourDepth =
205	StringConverter::parseUnsignedInt(opt->second.currentValue);
206	winOptions["colourDepth"] = StringConverter::toString(colourDepth);
207
208	opt = mOptions.find("VSync");
209	if (opt == mOptions.end())
210	OGRE_EXCEPT(999, "Can't find VSync options!", "Win32GLSupport::createWindow");
211	bool vsync = (opt->second.currentValue == "Yes");
212	winOptions["vsync"] = StringConverter::toString(vsync);
213	renderSystem->setWaitForVerticalBlank(vsync);
214
215	opt = mOptions.find("FSAA");
216	if (opt == mOptions.end())
217	OGRE_EXCEPT(999, "Can't find FSAA options!", "Win32GLSupport::createWindow");
218	unsigned int multisample =
219	StringConverter::parseUnsignedInt(opt->second.currentValue);
220	winOptions["FSAA"] = StringConverter::toString(multisample);
221
222	return renderSystem->createRenderWindow(windowTitle, w, h, fullscreen, &winOptions);
223	}
224	else
225	{
226	// XXX What is the else?
227	return NULL;
228	}
229	}
230
231	RenderWindow* Win32GLSupport::newWindow(const String &name, unsigned int width,
232	unsigned int height, bool fullScreen, const NameValuePairList *miscParams)
233	{
234	ConfigOptionMap::iterator opt = mOptions.find("Display Frequency");
235	if (opt == mOptions.end())
236	OGRE_EXCEPT(999, "Can't find Colour Depth options!", "Win32GLSupport::newWindow");
237	unsigned int displayFrequency = StringConverter::parseUnsignedInt(opt->second.currentValue);
238
239	Win32Window* window = new Win32Window(*this);
240	window->create(name, width, height, fullScreen, miscParams);
241
242	if(!mInitialWindow)
243	mInitialWindow = window;
244	return window;
245	}
246
247	void Win32GLSupport::start()
248	{
249	LogManager::getSingleton().logMessage("* Starting Win32GL Subsystem *");
250	}
251
252	void Win32GLSupport::stop()
253	{
254	LogManager::getSingleton().logMessage("* Stopping Win32GL Subsystem *");
255	}
256
257	void Win32GLSupport::initialiseExtensions() {
258	assert(mInitialWindow);
259	// First, initialise the normal extensions
260	GLSupport::initialiseExtensions();
261	// Check for W32 specific extensions probe function
262	PFNWGLGETEXTENSIONSSTRINGARBPROC _wglGetExtensionsStringARB =
263	(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
264	if(!_wglGetExtensionsStringARB)
265	return;
266	const char *wgl_extensions = _wglGetExtensionsStringARB(mInitialWindow->getHDC());
267	StringUtil::StrStreamType str;
268	str << "Supported WGL extensions: " << wgl_extensions;
269	LogManager::getSingleton().logMessage(
270	LML_NORMAL, str.str());
271	// Parse them, and add them to the main list
272	std::stringstream ext;
273	String instr;
274	ext << wgl_extensions;
275	while(ext >> instr)
276	{
277	extensionList.insert(instr);
278	}
279	}
280
281	void Win32GLSupport::initialiseCapabilities(RenderSystemCapabilities &caps)
282	{
283	if( checkExtension("WGL_ARB_pbuffer") )
284	{
285	// If yes, add rendersystem flag RSC_HWRENDER_TO_TEXTURE
286	caps.setCapability(RSC_HWRENDER_TO_TEXTURE);
287	}
288	}
289
290	void* Win32GLSupport::getProcAddress(const String& procname)
291	{
292	return (void*)wglGetProcAddress( procname.c_str() );
293	}
294
295	RenderTexture * Win32GLSupport::createRenderTexture( const String & name,
296	unsigned int width, unsigned int height,
297	TextureType texType, PixelFormat internalFormat,
298	const NameValuePairList *miscParams )
299	{
300	#ifdef HW_RTT
301	bool useBind = checkExtension("WGL_ARB_render_texture");
302
303	if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_HWRENDER_TO_TEXTURE))
304	return new Win32RenderTexture(*this, name, width, height, texType,
305	internalFormat, miscParams, useBind);
306	else
307	#endif
308	return new GLRenderTexture(name, width, height, texType, internalFormat, miscParams);
309	}
310
311	void Win32GLSupport::initialiseWGL()
312	{
313	// wglGetProcAddress does not work without an active OpenGL context,
314	// but we need wglChoosePixelFormatARB's address before we can
315	// create our main window. Thank you very much, Microsoft!
316	//
317	// The solution is to create a dummy OpenGL window first, and then
318	// test for WGL_ARB_pixel_format support. If it is not supported,
319	// we make sure to never call the ARB pixel format functions.
320	//
321	// If is is supported, we call the pixel format functions at least once
322	// to initialise them (pointers are stored by glprocs.h). We can also
323	// take this opportunity to enumerate the valid FSAA modes.
324
325	LPCSTR dummyText = "OgreWglDummy";
326	HINSTANCE hinst = GetModuleHandle("RenderSystem_GL.dll");
327
328	WNDCLASS dummyClass;
329	memset(&dummyClass, 0, sizeof(WNDCLASS));
330	dummyClass.style = CS_OWNDC;
331	dummyClass.hInstance = hinst;
332	dummyClass.lpfnWndProc = dummyWndProc;
333	dummyClass.lpszClassName = dummyText;
334	RegisterClass(&dummyClass);
335
336	HWND hwnd = CreateWindow(dummyText, dummyText,
337	WS_POPUP \| WS_CLIPCHILDREN \| WS_CLIPSIBLINGS,
338	0, 0, 32, 32, 0, 0, hinst, 0);
339
340	// if a simple CreateWindow fails, then boy are we in trouble...
341	if (hwnd == NULL)
342	OGRE_EXCEPT(0, "CreateWindow() failed", "Win32GLSupport::initializeWGL");
343
344
345	// no chance of failure and no need to release thanks to CS_OWNDC
346	HDC hdc = GetDC(hwnd);
347
348	// assign a simple OpenGL pixel format that everyone supports
349	PIXELFORMATDESCRIPTOR pfd;
350	memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
351	pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
352	pfd.nVersion = 1;
353	pfd.cColorBits = 16;
354	pfd.cDepthBits = 15;
355	pfd.dwFlags = PFD_DRAW_TO_WINDOW\|PFD_SUPPORT_OPENGL\|PFD_DOUBLEBUFFER;
356	pfd.iPixelType = PFD_TYPE_RGBA;
357
358	// if these fail, wglCreateContext will also quietly fail
359	int format;
360	if ((format = ChoosePixelFormat(hdc, &pfd)) != 0)
361	SetPixelFormat(hdc, format, &pfd);
362
363	HGLRC hrc = wglCreateContext(hdc);
364	if (hrc)
365	{
366	// if wglMakeCurrent fails, wglGetProcAddress will return null
367	wglMakeCurrent(hdc, hrc);
368
369	PFNWGLGETEXTENSIONSSTRINGARBPROC _wglGetExtensionsStringARB =
370	(PFNWGLGETEXTENSIONSSTRINGARBPROC)
371	wglGetProcAddress("wglGetExtensionsStringARB");
372
373	// check for pixel format and multisampling support
374	bool hasMultisample = false;
375
376	if (_wglGetExtensionsStringARB)
377	{
378	std::istringstream wglexts(_wglGetExtensionsStringARB(hdc));
379	std::string ext;
380	while (wglexts >> ext)
381	{
382	if (ext == "WGL_ARB_pixel_format")
383	mHasPixelFormatARB = true;
384	else if (ext == "WGL_ARB_multisample")
385	hasMultisample = true;
386	}
387	}
388
389	if (mHasPixelFormatARB && hasMultisample)
390	{
391	// enumerate all 32-bit formats w/ multisampling
392	int iattr[] = {
393	WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
394	WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
395	WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
396	WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
397	WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
398	WGL_COLOR_BITS_ARB, 24,
399	WGL_ALPHA_BITS_ARB, 8,
400	WGL_DEPTH_BITS_ARB, 24,
401	WGL_STENCIL_BITS_ARB, 8,
402	WGL_SAMPLES_ARB, 2,
403	0
404	};
405	int formats[256];
406	unsigned int count;
407	wglChoosePixelFormatARB(hdc, iattr, 0, 256, formats, &count);
408
409	// determine what multisampling levels are offered
410	int query = WGL_SAMPLES_ARB, samples;
411	for (unsigned int i = 0; i < count; ++i)
412	{
413	if (wglGetPixelFormatAttribivARB(hdc, formats[i],
414	0, 1, &query, &samples))
415	mFSAALevels.push_back(samples);
416	}
417	remove_duplicates(mFSAALevels);
418	}
419
420	wglMakeCurrent(0, 0);
421	wglDeleteContext(hrc);
422	}
423
424	// clean up our dummy window and class
425	DestroyWindow(hwnd);
426	UnregisterClass(dummyText, hinst);
427	}
428
429	LRESULT Win32GLSupport::dummyWndProc(HWND hwnd, UINT umsg, WPARAM wp, LPARAM lp)
430	{
431	return DefWindowProc(hwnd, umsg, wp, lp);
432	}
433
434	bool Win32GLSupport::selectPixelFormat(HDC hdc, int colourDepth, int multisample)
435	{
436	PIXELFORMATDESCRIPTOR pfd;
437	memset(&pfd, 0, sizeof(pfd));
438	pfd.nSize = sizeof(pfd);
439	pfd.nVersion = 1;
440	pfd.dwFlags = PFD_DRAW_TO_WINDOW \| PFD_SUPPORT_OPENGL \| PFD_DOUBLEBUFFER;
441	pfd.iPixelType = PFD_TYPE_RGBA;
442	pfd.cColorBits = (colourDepth > 16)? 24 : colourDepth;
443	pfd.cAlphaBits = (colourDepth > 16)? 8 : 0;
444	pfd.cDepthBits = 24;
445	pfd.cStencilBits = 8;
446
447	int format = 0;
448
449	if (multisample)
450	{
451	// only available at 32bpp with driver support
452	if (colourDepth < 32 \|\| !mHasPixelFormatARB)
453	return false;
454
455	int iattr[] = {
456	WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
457	WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
458	WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
459	WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
460	WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
461	WGL_COLOR_BITS_ARB, 24,
462	WGL_ALPHA_BITS_ARB, 8,
463	WGL_DEPTH_BITS_ARB, 24,
464	WGL_STENCIL_BITS_ARB, 8,
465	WGL_SAMPLES_ARB, multisample,
466	0
467	};
468
469	UINT nformats;
470	wglChoosePixelFormatARB(hdc, iattr, NULL, 1, &format, &nformats);
471	}
472	else
473	{
474	format = ChoosePixelFormat(hdc, &pfd);
475	}
476
477	return (format != 0 && SetPixelFormat(hdc, format, &pfd));
478	}
479	}

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