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Added support WindowingSystemInterface for querring the number of screens, the screen size and creating GraphicsContexts.

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This commit is contained in:
Robert Osfield
2006-12-17 20:49:01 +00:00
parent 982a4db9e2
commit afc77f9b39
5 changed files with 111 additions and 50 deletions
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38
include/osg/GraphicsContext
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@@ -24,12 +24,21 @@ class OSG_EXPORT GraphicsContext : public Referenced
{
public:
struct ScreenIdentifier
{
ScreenIdentifier():
_displayNum(0),
_screenNum(0) {}
std::string _hostName;
unsigned int _displayNum;
unsigned int _screenNum;
};
/** GraphicsContext Traits object provides the specification of what type of graphics context is required.*/
struct Traits : public osg::Referenced
struct Traits : public osg::Referenced, public ScreenIdentifier
{
Traits():
_displayNum(0),
_screenNum(0),
_x(0),
_y(0),
_width(0),
@@ -50,12 +59,7 @@ class OSG_EXPORT GraphicsContext : public Referenced
_face(0),
_mipMapGeneration(false),
_sharedContext() {}
// where graphic context is be hosted.
std::string _hostName;
unsigned int _displayNum;
unsigned int _screenNum;
// graphics context orginal and size
unsigned int _x;
unsigned int _y;
@@ -92,19 +96,23 @@ class OSG_EXPORT GraphicsContext : public Referenced
/** Callback to be implemented to provide access to Windowing API's ability to create Windows/pbuffers.*/
struct CreateGraphicContextCallback : public osg::Referenced
struct WindowingSystemInterface : public osg::Referenced
{
virtual unsigned int getNumScreens(const ScreenIdentifier& screenIdentifier = ScreenIdentifier()) = 0;
virtual void getScreenResolution(const ScreenIdentifier& screenIdentifier, unsigned int& width, unsigned int& height) = 0;
virtual GraphicsContext* createGraphicsContext(Traits* traits) = 0;
virtual ~CreateGraphicContextCallback() {};
virtual ~WindowingSystemInterface() {};
};
/** Set the create graphics context callback - this callback should be supplied by the windows toolkit. */
static void setCreateGraphicsContextCallback(CreateGraphicContextCallback* callback);
/** Set the querry the windowing system for screens and create graphics context - this functor should be supplied by the windows toolkit. */
static void setWindowingSystemInterface(WindowingSystemInterface* wsInterface);
/** Get the create graphics context callback*/
static CreateGraphicContextCallback* getCreateGraphicsContextCallback();
/** Get the WindowingSystemInterface*/
static WindowingSystemInterface* getWindowingSystemInterface();
/** Create a graphics context for a specified set of traits.*/
static GraphicsContext* createGraphicsContext(Traits* traits);