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implement SetGammaRamp on WGL (d1x r1.14)

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Bradley Bell 2004-05-20 02:13:13 +00:00
parent 130ac9dfb4
commit b49dc3439f
2 changed files with 18 additions and 6 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2004-05-19 Matthew Mueller <donut@dakotacom.net>
* arch/ogl/wgl.c: implement SetGammaRamp on WGL (d1x r1.14)
* arch/ogl/gr.c, arch/ogl/internal.h, arch/ogl/sdlgl.c,
arch/ogl/wgl.c, include/ogl_init.h: implement brightness/palette
effects in OGL using SetGammaRamp, much faster than the hack that

22
arch/ogl/wgl.c
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@ -1,4 +1,4 @@
/* $Id: wgl.c,v 1.6 2004-05-20 02:04:29 btb Exp $ */
/* $Id: wgl.c,v 1.7 2004-05-20 02:13:13 btb Exp $ */
/*
*
* opengl platform specific functions for WGL - added by Peter Hawkins
@ -53,7 +53,8 @@ static int GLSTATE_width,GLSTATE_height;
static bool GLPREF_windowed;
static HGLRC GL_ResourceContext=NULL;
//static WORD Saved_gamma_values[256*3];
static WORD Saved_gamma_values[256 * 3];
static WORD gammaramp[256 * 3];
bool OpenGL_Initialize(void);
void OpenGL_Shutdown(void);
@ -159,7 +160,16 @@ long PASCAL DescentWndProc(HWND hWnd,UINT message,
int ogl_setbrightness_internal(void)
{
return -1; // TODO: not yet implemented
int i;
for (i = 0; i < 256; ++i)
gammaramp[i] = min((i + ogl_brightness_r * 4) * 256, 0xffff);
for (i = 0; i < 256; ++i)
gammaramp[i + 256] = min((i + ogl_brightness_g * 4) * 256, 0xffff);
for (i = 0; i < 256; ++i)
gammaramp[i + 512] = min((i + ogl_brightness_b * 4) * 256, 0xffff);
return SetDeviceGammaRamp(hDC, (LPVOID)gammaramp) ? 0 : -1;
}
void ogl_swap_buffers_internal(void){
@ -488,7 +498,7 @@ bool OpenGL_Initialize(void)
// Save our gamma values because we'll probably be changing them,
// this way we can restore them on exit
// GetDeviceGammaRamp(hDC,(LPVOID)Saved_gamma_values);
GetDeviceGammaRamp(hDC, (LPVOID)Saved_gamma_values);
return true;
@ -517,7 +527,7 @@ void OpenGL_Shutdown(void)
// Restore gamma values
// SetDeviceGammaRamp(hDC,(LPVOID)Saved_gamma_values);
SetDeviceGammaRamp(hDC, (LPVOID)Saved_gamma_values);
ReleaseDC(g_hWnd,hDC);
}