diff options
| -rw-r--r-- | src/gamma-w32gdi.c | 36 | ||||
| -rw-r--r-- | src/gamma-w32gdi.h | 1 |
2 files changed, 30 insertions, 7 deletions
diff --git a/src/gamma-w32gdi.c b/src/gamma-w32gdi.c index c07ce91..c518fe6 100644 --- a/src/gamma-w32gdi.c +++ b/src/gamma-w32gdi.c @@ -43,6 +43,7 @@ int w32gdi_init(w32gdi_state_t *state) { state->saved_ramps = NULL; + state->preserve = 0; return 0; } @@ -102,12 +103,26 @@ w32gdi_print_help(FILE *f) { fputs(_("Adjust gamma ramps with the Windows GDI.\n"), f); fputs("\n", f); + + /* TRANSLATORS: Windows GDI help output + left column must not be translated */ + fputs(_(" preserve={0,1}\tWhether existing gamma should be" + " preserved\n"), + f); + fputs("\n", f); } int w32gdi_set_option(w32gdi_state_t *state, const char *key, const char *value) { - return -1; + if (strcasecmp(key, "preserve") == 0) { + state->preserve = atoi(value); + } else { + fprintf(stderr, _("Unknown method parameter: `%s'.\n"), key); + return -1; + } + + return 0; } void @@ -153,12 +168,19 @@ w32gdi_set_temperature(w32gdi_state_t *state, WORD *gamma_g = &gamma_ramps[1*GAMMA_RAMP_SIZE]; WORD *gamma_b = &gamma_ramps[2*GAMMA_RAMP_SIZE]; - /* Initialize gamma ramps to pure state */ - for (int i = 0; i < GAMMA_RAMP_SIZE; i++) { - WORD value = (double)i/GAMMA_RAMP_SIZE * (UINT16_MAX+1); - gamma_r[i] = value; - gamma_g[i] = value; - gamma_b[i] = value; + if (state->preserve) { + /* Initialize gamma ramps from saved state */ + memcpy(gamma_ramps, state->saved_ramps, + 3*GAMMA_RAMP_SIZE*sizeof(WORD)); + } else { + /* Initialize gamma ramps to pure state */ + for (int i = 0; i < GAMMA_RAMP_SIZE; i++) { + WORD value = (double)i/GAMMA_RAMP_SIZE * + (UINT16_MAX+1); + gamma_r[i] = value; + gamma_g[i] = value; + gamma_b[i] = value; + } } colorramp_fill(gamma_r, gamma_g, gamma_b, GAMMA_RAMP_SIZE, diff --git a/src/gamma-w32gdi.h b/src/gamma-w32gdi.h index 1f985c8..6e73cd1 100644 --- a/src/gamma-w32gdi.h +++ b/src/gamma-w32gdi.h @@ -28,6 +28,7 @@ typedef struct { WORD *saved_ramps; + int preserve; } w32gdi_state_t; |