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dxgsg9: don't attempt to restore gamma if it wasn't modified

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This commit is contained in:
rdb 2019-12-28 18:04:55 +01:00
parent b656b0bbf9
commit e13719132b
1 changed files with 5 additions and 1 deletions
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4
panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
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@ -5269,6 +5269,7 @@ calc_fb_properties(DWORD cformat, DWORD dformat,
#define GAMMA_1 (255.0 * 256.0)
static bool _gamma_table_initialized = false;
static bool _gamma_changed = false;
static unsigned short _original_gamma_table [256 * 3];
void _create_gamma_table_dx9 (PN_stdfloat gamma, unsigned short *original_red_table, unsigned short *original_green_table, unsigned short *original_blue_table, unsigned short *red_table, unsigned short *green_table, unsigned short *blue_table) {
@ -5366,6 +5367,7 @@ static_set_gamma(bool restore, PN_stdfloat gamma) {
if (SetDeviceGammaRamp (hdc, ramp)) {
set = true;
_gamma_changed = !restore;
}
ReleaseDC (nullptr, hdc);
@ -5403,7 +5405,9 @@ restore_gamma() {
void DXGraphicsStateGuardian9::
atexit_function(void) {
set_cg_device(nullptr);
if (_gamma_changed) {
static_set_gamma(true, 1.0f);
}
}
/**