GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
const char* title,
GLFWmonitor* monitor,
GLFWwindow* share)
{
_GLFWfbconfig fbconfig;
_GLFWwndconfig wndconfig;
_GLFWwindow* window;
_GLFWwindow* previous;
if (!_glfwInitialized)
{
_glfwInputError(GLFW_NOT_INITIALIZED, NULL);
return NULL;
}
if (width <= 0 || height <= 0)
{
_glfwInputError(GLFW_INVALID_VALUE, "Invalid window size");
return GL_FALSE;
}
// Set up desired framebuffer config
fbconfig.redBits = Max(_glfw.hints.redBits, 0);
fbconfig.greenBits = Max(_glfw.hints.greenBits, 0);
fbconfig.blueBits = Max(_glfw.hints.blueBits, 0);
fbconfig.alphaBits = Max(_glfw.hints.alphaBits, 0);
fbconfig.depthBits = Max(_glfw.hints.depthBits, 0);
fbconfig.stencilBits = Max(_glfw.hints.stencilBits, 0);
fbconfig.accumRedBits = Max(_glfw.hints.accumRedBits, 0);
fbconfig.accumGreenBits = Max(_glfw.hints.accumGreenBits, 0);
fbconfig.accumBlueBits = Max(_glfw.hints.accumBlueBits, 0);
fbconfig.accumAlphaBits = Max(_glfw.hints.accumAlphaBits, 0);
fbconfig.auxBuffers = Max(_glfw.hints.auxBuffers, 0);
fbconfig.stereo = _glfw.hints.stereo ? GL_TRUE : GL_FALSE;
fbconfig.samples = Max(_glfw.hints.samples, 0);
fbconfig.sRGB = _glfw.hints.sRGB ? GL_TRUE : GL_FALSE;
// Set up desired window config
wndconfig.title = title;
wndconfig.resizable = _glfw.hints.resizable ? GL_TRUE : GL_FALSE;
wndconfig.visible = _glfw.hints.visible ? GL_TRUE : GL_FALSE;
wndconfig.positionX = _glfw.hints.positionX;
wndconfig.positionY = _glfw.hints.positionY;
wndconfig.clientAPI = _glfw.hints.clientAPI;
wndconfig.glMajor = _glfw.hints.glMajor;
wndconfig.glMinor = _glfw.hints.glMinor;
wndconfig.glForward = _glfw.hints.glForward ? GL_TRUE : GL_FALSE;
wndconfig.glDebug = _glfw.hints.glDebug ? GL_TRUE : GL_FALSE;
wndconfig.glProfile = _glfw.hints.glProfile;
wndconfig.glRobustness = _glfw.hints.glRobustness;
wndconfig.monitor = (_GLFWmonitor*) monitor;
wndconfig.share = (_GLFWwindow*) share;
// Check the OpenGL bits of the window config
if (!_glfwIsValidContextConfig(&wndconfig))
return GL_FALSE;
window = (_GLFWwindow*) calloc(1, sizeof(_GLFWwindow));
if (!window)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
window->next = _glfw.windowListHead;
_glfw.windowListHead = window;
if (wndconfig.monitor)
{
wndconfig.resizable = GL_TRUE;
wndconfig.visible = GL_TRUE;
window->videoMode.width = width;
window->videoMode.height = height;
window->videoMode.redBits = fbconfig.redBits;
window->videoMode.greenBits = fbconfig.greenBits;
window->videoMode.blueBits = fbconfig.blueBits;
}
window->width = width;
window->height = height;
window->monitor = wndconfig.monitor;
window->resizable = wndconfig.resizable;
window->cursorMode = GLFW_CURSOR_NORMAL;
// Save the currently current context so it can be restored later
previous = (_GLFWwindow*) glfwGetCurrentContext();
// Open the actual window and create its context
if (!_glfwPlatformCreateWindow(window, &wndconfig, &fbconfig))
{
glfwDestroyWindow((GLFWwindow*) window);
glfwMakeContextCurrent((GLFWwindow*) previous);
return GL_FALSE;
}
glfwMakeContextCurrent((GLFWwindow*) window);
// Cache the actual (as opposed to requested) context parameters
if (!_glfwRefreshContextParams())
{
glfwDestroyWindow((GLFWwindow*) window);
glfwMakeContextCurrent((GLFWwindow*) previous);
return GL_FALSE;
}
// Verify the context against the requested parameters
if (!_glfwIsValidContext(&wndconfig))
{
glfwDestroyWindow((GLFWwindow*) window);
glfwMakeContextCurrent((GLFWwindow*) previous);
return GL_FALSE;
}
// Clearing the front buffer to black to avoid garbage pixels left over
// from previous uses of our bit of VRAM
glClear(GL_COLOR_BUFFER_BIT);
_glfwPlatformSwapBuffers(window);
// Restore the previously current context (or NULL)
glfwMakeContextCurrent((GLFWwindow*) previous);
// The GLFW specification states that fullscreen windows have the cursor
// captured by default
if (wndconfig.monitor)
glfwSetInputMode((GLFWwindow*) window, GLFW_CURSOR_MODE, GLFW_CURSOR_CAPTURED);
if (wndconfig.monitor == NULL && wndconfig.visible)
glfwShowWindow((GLFWwindow*) window);
return (GLFWwindow*) window;
}
GLFWAPI int GLFWAPIENTRY glfwOpenWindow( int width, int height,
int redbits, int greenbits, int bluebits, int alphabits,
int depthbits, int stencilbits, int mode )
{
_GLFWfbconfig fbconfig;
_GLFWwndconfig wndconfig;
if( !_glfwInitialized || _glfwWin.opened )
{
return GL_FALSE;
}
// Set up desired framebuffer config
fbconfig.redBits = Max( redbits, 0 );
fbconfig.greenBits = Max( greenbits, 0 );
fbconfig.blueBits = Max( bluebits, 0 );
fbconfig.alphaBits = Max( alphabits, 0 );
fbconfig.depthBits = Max( depthbits, 0 );
fbconfig.stencilBits = Max( stencilbits, 0 );
fbconfig.accumRedBits = Max( _glfwLibrary.hints.accumRedBits, 0 );
fbconfig.accumGreenBits = Max( _glfwLibrary.hints.accumGreenBits, 0 );
fbconfig.accumBlueBits = Max( _glfwLibrary.hints.accumBlueBits, 0 );
fbconfig.accumAlphaBits = Max( _glfwLibrary.hints.accumAlphaBits, 0 );
fbconfig.auxBuffers = Max( _glfwLibrary.hints.auxBuffers, 0 );
fbconfig.stereo = _glfwLibrary.hints.stereo ? GL_TRUE : GL_FALSE;
fbconfig.samples = Max( _glfwLibrary.hints.samples, 0 );
// Set up desired window config
wndconfig.mode = mode;
wndconfig.refreshRate = Max( _glfwLibrary.hints.refreshRate, 0 );
wndconfig.windowNoResize = _glfwLibrary.hints.windowNoResize ? GL_TRUE : GL_FALSE;
wndconfig.glMajor = Max( _glfwLibrary.hints.glMajor, 1 );
wndconfig.glMinor = Max( _glfwLibrary.hints.glMinor, 0 );
wndconfig.glForward = _glfwLibrary.hints.glForward ? GL_TRUE : GL_FALSE;
wndconfig.glDebug = _glfwLibrary.hints.glDebug ? GL_TRUE : GL_FALSE;
wndconfig.glProfile = _glfwLibrary.hints.glProfile;
if( wndconfig.glMajor == 1 && wndconfig.glMinor > 5 )
{
// OpenGL 1.x series ended with version 1.5
return GL_FALSE;
}
else if( wndconfig.glMajor == 2 && wndconfig.glMinor > 1 )
{
// OpenGL 2.x series ended with version 2.1
return GL_FALSE;
}
else if( wndconfig.glMajor == 3 && wndconfig.glMinor > 3 )
{
// OpenGL 3.x series ended with version 3.3
return GL_FALSE;
}
else
{
// For now, let everything else through
}
if( wndconfig.glProfile &&
( wndconfig.glMajor < 3 || ( wndconfig.glMajor == 3 && wndconfig.glMinor < 2 ) ) )
{
// Context profiles are only defined for OpenGL version 3.2 and above
return GL_FALSE;
}
if( wndconfig.glForward && wndconfig.glMajor < 3 )
{
// Forward-compatible contexts are only defined for OpenGL version 3.0 and above
return GL_FALSE;
}
// Clear for next open call
_glfwClearWindowHints();
// Check input arguments
if( mode != GLFW_WINDOW && mode != GLFW_FULLSCREEN )
{
return GL_FALSE;
}
// Clear GLFW window state
_glfwWin.active = GL_TRUE;
_glfwWin.iconified = GL_FALSE;
_glfwWin.mouseLock = GL_FALSE;
_glfwWin.autoPollEvents = GL_TRUE;
_glfwClearInput();
// Unregister all callback functions
_glfwWin.windowSizeCallback = NULL;
_glfwWin.windowCloseCallback = NULL;
_glfwWin.windowRefreshCallback = NULL;
_glfwWin.keyCallback = NULL;
_glfwWin.charCallback = NULL;
_glfwWin.mousePosCallback = NULL;
_glfwWin.mouseButtonCallback = NULL;
_glfwWin.mouseWheelCallback = NULL;
// Check width & height
if( width > 0 && height <= 0 )
{
// Set the window aspect ratio to 4:3
height = (width * 3) / 4;
}
else if( width <= 0 && height > 0 )
{
// Set the window aspect ratio to 4:3
width = (height * 4) / 3;
}
else if( width <= 0 && height <= 0 )
{
// Default window size
width = 640;
height = 480;
}
// Remember window settings
_glfwWin.width = width;
_glfwWin.height = height;
_glfwWin.fullscreen = (mode == GLFW_FULLSCREEN ? GL_TRUE : GL_FALSE);
// Platform specific window opening routine
if( !_glfwPlatformOpenWindow( width, height, &wndconfig, &fbconfig ) )
{
glfwCloseWindow();
return GL_FALSE;
}
// Flag that window is now opened
_glfwWin.opened = GL_TRUE;
// Read back window and context parameters
_glfwPlatformRefreshWindowParams();
_glfwRefreshContextParams();
if( _glfwWin.glMajor < wndconfig.glMajor ||
( _glfwWin.glMajor == wndconfig.glMajor &&
_glfwWin.glMinor < wndconfig.glMinor ) )
{
glfwCloseWindow();
return GL_FALSE;
}
// Do we have non-power-of-two textures (added to core in version 2.0)?
_glfwWin.has_GL_ARB_texture_non_power_of_two =
( _glfwWin.glMajor >= 2 ) ||
glfwExtensionSupported( "GL_ARB_texture_non_power_of_two" );
// Do we have automatic mipmap generation (added to core in version 1.4)?
_glfwWin.has_GL_SGIS_generate_mipmap =
( _glfwWin.glMajor >= 2 ) || ( _glfwWin.glMinor >= 4 ) ||
glfwExtensionSupported( "GL_SGIS_generate_mipmap" );
if( _glfwWin.glMajor > 2 )
{
_glfwWin.GetStringi = (PFNGLGETSTRINGIPROC) glfwGetProcAddress( "glGetStringi" );
if( !_glfwWin.GetStringi )
{
// This is a very common problem among people who compile GLFW
// on X11/GLX using custom build systems, as the glfwGetProcAddress
// code path selection needs explicit configuration
//
// See readme.html section 2.2 for details
glfwCloseWindow();
return GL_FALSE;
}
}
// If full-screen mode was requested, disable mouse cursor
if( mode == GLFW_FULLSCREEN )
{
glfwDisable( GLFW_MOUSE_CURSOR );
}
// Start by clearing the front buffer to black (avoid ugly desktop
// remains in our OpenGL window)
glClear( GL_COLOR_BUFFER_BIT );
_glfwPlatformSwapBuffers();
return GL_TRUE;
}
