diff options
Diffstat (limited to 'src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx')
| -rw-r--r-- | src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx index 7952dfdc1..ca72d3e92 100644 --- a/src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx +++ b/src/drivers/WinAPI/Fl_WinAPI_Gl_Window_Driver.cxx @@ -25,6 +25,10 @@ #include "../GDI/Fl_Font.H" extern void fl_save_dc(HWND, HDC); +#ifndef GL_CURRENT_PROGRAM +# define GL_CURRENT_PROGRAM 0x8B8D // from glew.h +#endif + // STR #3119: select pixel format with composition support // ... and no more than 32 color bits (8 bits/color) // Ref: PixelFormatDescriptor Object @@ -368,6 +372,22 @@ void Fl_WinAPI_Gl_Window_Driver::get_list(Fl_Font_Descriptor *fd, int r) { } +typedef void (WINAPI *glUseProgram_type)(GLint); +static glUseProgram_type glUseProgram_f = NULL; + +void Fl_WinAPI_Gl_Window_Driver::switch_to_GL1() { + if (!glUseProgram_f) { + glUseProgram_f = (glUseProgram_type)GetProcAddress("glUseProgram"); + } + glGetIntegerv(GL_CURRENT_PROGRAM, ¤t_prog); + if (current_prog) glUseProgram_f(0); +} + +void Fl_WinAPI_Gl_Window_Driver::switch_back() { + if (current_prog) glUseProgram_f((GLuint)current_prog); +} + + FL_EXPORT HGLRC fl_win32_glcontext(GLContext rc) { return (HGLRC)rc; } #endif // HAVE_GL |