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annotate src/video/win32/SDL_win32gamma.c @ 2915:deb377097225

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Fixed CPU feature detection on x86_64 platform (registers were being corrupted, causing crashes)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 24 Dec 2008 13:13:38 +0000
parents 99210400e8b9
children 0d12e8f1de3c
rev   line source
1895
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1 /*
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2 SDL - Simple DirectMedia Layer
2859
99210400e8b9 Updated copyright date
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3 Copyright (C) 1997-2009 Sam Lantinga
1895
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_win32video.h"
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25
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26
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27 int
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28 WIN_SetDisplayGammaRamp(_THIS, Uint16 * ramp)
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29 {
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30 SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
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31 HDC hdc;
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32 BOOL succeeded = FALSE;
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33
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34 hdc = CreateDC(data->DeviceName, NULL, NULL, NULL);
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35 if (hdc) {
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36 succeeded = SetDeviceGammaRamp(hdc, ramp);
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37 if (!succeeded) {
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38 WIN_SetError("SetDeviceGammaRamp()");
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39 }
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40 DeleteDC(hdc);
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41 }
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42 return succeeded ? 0 : -1;
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43 }
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44
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45 int
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46 WIN_GetDisplayGammaRamp(_THIS, Uint16 * ramp)
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47 {
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48 SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
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49 HDC hdc;
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50 BOOL succeeded = FALSE;
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51
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52 hdc = CreateDC(data->DeviceName, NULL, NULL, NULL);
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53 if (hdc) {
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54 succeeded = GetDeviceGammaRamp(hdc, ramp);
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55 if (!succeeded) {
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56 WIN_SetError("GetDeviceGammaRamp()");
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57 }
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58 DeleteDC(hdc);
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59 }
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60 return succeeded ? 0 : -1;
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61 }
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62
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63 /* vi: set ts=4 sw=4 expandtab: */