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STR 1373: adds vsync control to OpenGL contexts on macOS

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Windows and X11 to follow, no idea about Wayland.
This commit is contained in:
Matthias Melcher 2023-11-26 12:37:59 +01:00
parent 102437f1ee
commit 6817e821af
5 changed files with 36 additions and 0 deletions
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2
FL/Fl_Gl_Window.H
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@ -199,6 +199,8 @@ public:
void context(GLContext, int destroy_flag = 0);
void make_current();
void swap_buffers();
void swap_interval(int);
int swap_interval() const;
void ortho();
int can_do_overlay();

15
src/Fl_Gl_Window.cxx
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@ -161,6 +161,21 @@ void Fl_Gl_Window::swap_buffers() {
pGlWindowDriver->swap_buffers();
}
/**
Sets the rate at which the GL windows swaps buffers.
*/
void Fl_Gl_Window::swap_interval(int frames) {
pGlWindowDriver->swap_interval(frames);
}
/**
Gets the rate at which the GL windows swaps buffers.
*/
int Fl_Gl_Window::swap_interval() const {
return pGlWindowDriver->swap_interval();
}
void Fl_Gl_Window::flush() {
if (!shown()) return;
uchar save_valid = valid_f_ & 1;

2
src/Fl_Gl_Window_Driver.H
View File

@ -69,6 +69,8 @@ public:
virtual void swap_buffers() {}
virtual void resize(int /*is_a_resize*/, int /*w*/, int /*h*/) {}
virtual char swap_type();
virtual void swap_interval(int) { }
virtual int swap_interval() { return -1; }
virtual int flush_begin(char&) {return 0;}
virtual void gl_hide_before(void *&) {} // the default implementation may be enough
static Fl_Gl_Choice *find_begin(int m, const int *alistp);

2
src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.H
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@ -38,6 +38,8 @@ class Fl_Cocoa_Gl_Window_Driver : public Fl_Gl_Window_Driver {
void swap_buffers() FL_OVERRIDE;
void resize(int is_a_resize, int w, int h) FL_OVERRIDE;
char swap_type() FL_OVERRIDE;
void swap_interval(int) FL_OVERRIDE;
int swap_interval() FL_OVERRIDE;
Fl_Gl_Choice *find(int m, const int *alistp) FL_OVERRIDE;
GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g) FL_OVERRIDE;
void set_gl_context(Fl_Window* w, GLContext context) FL_OVERRIDE;

15
src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm
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@ -355,6 +355,21 @@ void Fl_Cocoa_Gl_Window_Driver::swap_buffers() {
char Fl_Cocoa_Gl_Window_Driver::swap_type() {return copy;}
void Fl_Cocoa_Gl_Window_Driver::swap_interval(int n) {
GLint interval = (GLint)n;
NSOpenGLContext* ctx = (NSOpenGLContext*)pWindow->context();
if (ctx)
[ctx setValues:&interval forParameter:NSOpenGLContextParameterSwapInterval];
}
int Fl_Cocoa_Gl_Window_Driver::swap_interval() {
GLint interval = (GLint)-1;
NSOpenGLContext* ctx = (NSOpenGLContext*)pWindow->context();
if (ctx)
[ctx getValues:&interval forParameter:NSOpenGLContextParameterSwapInterval];
return interval;
}
void Fl_Cocoa_Gl_Window_Driver::resize(int is_a_resize, int w, int h) {
if (pWindow->shown()) apply_scissor();
[(NSOpenGLContext*)pWindow->context() update];