//-----------------------------------------------------------------------------
int vlWin32::choosePixelFormat(const vl::OpenGLContextFormat& fmt, bool verbose)
{
if (!registerClass())
return false;
// this is true only under Win32
// VL_CHECK( sizeof(wchar_t) == sizeof(short int) )
HWND hWnd = CreateWindowEx(
WS_EX_APPWINDOW | WS_EX_ACCEPTFILES,
gWin32WindowClassName,
L"Temp GL Window",
WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, GetModuleHandle(NULL), NULL);
if (!hWnd)
{
if (verbose) MessageBox(NULL, L"choosePixelFormat() critical failure: could not create window.", L"Visualization Library error", MB_OK);
return -1;
}
HDC hDC = GetDC(hWnd);
if (!hDC)
{
if (verbose) MessageBox(NULL, L"choosePixelFormat() critical failure: could not create HDC.", L"Visualization Library error", MB_OK);
DestroyWindow(hWnd);
return -1;
}
PIXELFORMATDESCRIPTOR pfd;
memset(&pfd, 0, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
pfd.dwFlags |= fmt.doubleBuffer() ? PFD_DOUBLEBUFFER : 0;
pfd.dwFlags |= fmt.stereo() ? PFD_STEREO : 0;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 0;
pfd.cRedBits = (BYTE)fmt.rgbaBits().r();
pfd.cGreenBits = (BYTE)fmt.rgbaBits().g();
pfd.cBlueBits = (BYTE)fmt.rgbaBits().b();
pfd.cAlphaBits = (BYTE)fmt.rgbaBits().a();
pfd.cAccumRedBits = (BYTE)fmt.accumRGBABits().r();
pfd.cAccumGreenBits = (BYTE)fmt.accumRGBABits().g();
pfd.cAccumBlueBits = (BYTE)fmt.accumRGBABits().b();
pfd.cAccumAlphaBits = (BYTE)fmt.accumRGBABits().a();
pfd.cDepthBits = (BYTE)fmt.depthBufferBits();
pfd.cStencilBits = (BYTE)fmt.stencilBufferBits();
pfd.iLayerType = PFD_MAIN_PLANE;
int pixel_format_index = ChoosePixelFormat(hDC, &pfd);
if (pixel_format_index == 0)
{
if (verbose) MessageBox(NULL, L"choosePixelFormat() critical failure: could not choose temporary format.", L"Visualization Library error", MB_OK);
DeleteDC(hDC);
DestroyWindow(hWnd);
return -1;
}
if (SetPixelFormat(hDC, pixel_format_index, &pfd) == FALSE)
{
if (verbose) MessageBox(NULL, L"choosePixelFormat() critical failure: could not set temporary format.", L"Visualization Library error", MB_OK);
DeleteDC(hDC);
DestroyWindow(hWnd);
return -1;
}
// OpenGL Rendering Context
HGLRC hGLRC = wglCreateContext(hDC);
if (!hGLRC)
{
if (verbose) MessageBox(NULL, L"choosePixelFormat() critical failure: could not create temporary OpenGL context.", L"Visualization Library error", MB_OK);
DeleteDC(hDC);
DestroyWindow(hWnd);
return -1;
}
wglMakeCurrent(hDC, hGLRC);
if (!initializeOpenGL())
{
fprintf(stderr, "Error initializing OpenGL!\n");
DeleteDC(hDC);
DestroyWindow(hWnd);
return -1;
}
// if this is not supported we use the current 'pixel_format_index' returned by ChoosePixelFormat above.
int samples = 0;
if(Has_WGL_ARB_pixel_format && fmt.multisample())
{
float fAttributes[] = { 0, 0 };
int iAttributes[] =
{
// multi sampling
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, -1, // this is set below
// generic
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
// color buffer
WGL_RED_BITS_ARB, pfd.cRedBits,
WGL_GREEN_BITS_ARB, pfd.cGreenBits,
WGL_BLUE_BITS_ARB, pfd.cBlueBits,
WGL_ALPHA_BITS_ARB, pfd.cAlphaBits,
// accumulation buffer
WGL_ACCUM_RED_BITS_ARB, pfd.cAccumRedBits,
WGL_ACCUM_GREEN_BITS_ARB, pfd.cAccumGreenBits,
WGL_ACCUM_BLUE_BITS_ARB, pfd.cAccumBlueBits,
WGL_ACCUM_ALPHA_BITS_ARB, pfd.cAccumAlphaBits,
// depth buffer
WGL_DEPTH_BITS_ARB, pfd.cDepthBits,
WGL_DOUBLE_BUFFER_ARB, fmt.doubleBuffer() ? GL_TRUE : GL_FALSE,
// stencil buffer
WGL_STENCIL_BITS_ARB, pfd.cStencilBits,
// stereo
WGL_STEREO_ARB, fmt.stereo() ? GL_TRUE : GL_FALSE,
0,0
};
for(samples = fmt.multisampleSamples(); samples > 1; samples/=2)
{
// sets WGL_SAMPLES_ARB value
iAttributes[3] = samples;
pixel_format_index = -1;
UINT num_formats = 0;
if ( wglChoosePixelFormatARB(hDC,iAttributes,fAttributes,1,&pixel_format_index,&num_formats) && num_formats >= 1 )
break;
else
pixel_format_index = -1;
}
}
// destroy temporary HWND, HDC, HGLRC
if ( wglDeleteContext(hGLRC) == FALSE )
if (verbose) MessageBox(NULL, L"Error deleting temporary OpenGL context, wglDeleteContext(hGLRC) failed.", L"Visualization Library error", MB_OK);
DeleteDC(hDC);
DestroyWindow(hWnd);
if (verbose)
{
if(pixel_format_index == -1)
vl::Log::error("No suitable pixel format found.\n");
else
{
// check the returned pixel format
#if defined(DEBUG) || !defined(NDEBUG)
DescribePixelFormat(hDC, pixel_format_index, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
vl::Log::debug(" --- vlWin32::choosePixelFormat() ---\n");
// This one returns "not supported" even when its supported...
// vl::Log::print( vl::Say(" OpenGL = %s\n") << (pfd.dwFlags & PFD_SUPPORT_OPENGL ? "Supported" : "Not supported") );
vl::Log::debug( vl::Say("RGBA Bits = %n %n %n %n\n") << pfd.cRedBits << pfd.cGreenBits << pfd.cBlueBits << pfd.cAlphaBits);
vl::Log::debug( vl::Say("Depth Bits = %n\n") << pfd.cDepthBits );
vl::Log::debug( vl::Say("Stencil Bits = %n \n") << pfd.cStencilBits);
vl::Log::debug( vl::Say("Double Buffer = %s\n") << (pfd.dwFlags & PFD_DOUBLEBUFFER ? "Yes" : "No") );
vl::Log::debug( vl::Say("Stereo = %s\n") << (pfd.dwFlags & PFD_STEREO ? "Yes" : "No") );
vl::Log::debug( vl::Say("Samples = %n\n") << samples );
vl::Log::debug("\n");
#endif
}
}
return pixel_format_index;
}
//-----------------------------------------------------------------------------
bool SDLWindow::initSDLWindow(const vl::String& title, const vl::OpenGLContextFormat& info, int x, int y, int width, int height)
{
if (mScreen || mSDLWindow)
{
vl::Log::error("SDL supports only one window at a time.\n");
VL_TRAP();
return false;
}
framebuffer()->setWidth(width);
framebuffer()->setHeight(height);
mSDLWindow = this;
// init key translation map
for(int i=0; key_translation_vec[i]; i+=2)
key_translation_map[ key_translation_vec[i] ] = (vl::EKey)key_translation_vec[i+1];
// SDL_VIDEO_WINDOW_POS
char win_pos[32] = {0};
sprintf ( win_pos, "SDL_VIDEO_WINDOW_POS=%d,%d", x, y );
SDL_putenv(win_pos);
// setenv("SDL_VIDEO_CENTERED", "YES", 0);
// init SDL
if ( SDL_Init(SDL_INIT_VIDEO) < 0 )
{
printf("Unable to init SDL: %s\n", SDL_GetError());
return false;
}
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, info.rgbaBits().r());
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, info.rgbaBits().g());
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, info.rgbaBits().b());
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, info.rgbaBits().a());
SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE, info.accumRGBABits().r());
SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE, info.accumRGBABits().g());
SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE, info.accumRGBABits().b());
SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE, info.accumRGBABits().a());
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, info.depthBufferBits());
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, info.stencilBufferBits());
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, info.doubleBuffer()?1:0);
SDL_GL_SetAttribute(SDL_GL_STEREO, info.stereo());
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, info.multisample()?1:0);
if (info.multisample())
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, info.multisampleSamples());
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, info.vSync());
int bpp = SDL_GetVideoInfo()->vfmt->BitsPerPixel;
Uint32 flags = SDL_OPENGL | (info.fullscreen() ? SDL_FULLSCREEN : 0);
width = width !=0 ? width : SDL_GetVideoInfo()->current_w;
height = height !=0 ? height : SDL_GetVideoInfo()->current_h;
mScreen = SDL_SetVideoMode( width, height, bpp, flags );
if (mScreen == 0)
{
vl::Log::print( vl::Say("\n error: SDL_SetVideoMode(%n, %n, %n, %hn) failed: %s\n") << width << height << bpp << flags << SDL_GetError() );
exit(1);
}
// window size problem
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
VL_CHECK(viewport[0] == 0);
VL_CHECK(viewport[1] == 0);
if (viewport[2] != mScreen->w || viewport[3] != mScreen->h)
{
vl::Log::print( vl::Say("\n warning: OpenGL reported %nx%n as video size but SDL says %nx%n\n") << viewport[2] << viewport[3] << mScreen->w << mScreen->h );
VL_TRAP()
}
