author | William Roberts <williamr@symbian.org> |
Fri, 07 Aug 2009 11:20:16 +0100 | |
changeset 7 | b016402e601c |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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1 |
/* |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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2 |
SDL - Simple DirectMedia Layer |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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3 |
Copyright (C) 1997-2006 Sam Lantinga |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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4 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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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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Initial QEMU (symbian-qemu-0.9.1-12) import
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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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Initial QEMU (symbian-qemu-0.9.1-12) import
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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 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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13 |
Lesser General Public License for more details. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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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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Initial QEMU (symbian-qemu-0.9.1-12) import
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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 |
/* Gamma correction support */ |
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25 |
|
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#ifdef HAVE_MATH_H |
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#include <math.h> /* Used for calculating gamma ramps */ |
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#else |
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/* Math routines from uClibc: http://www.uclibc.org */ |
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#include "math_private.h" |
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#include "e_sqrt.h" |
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#include "e_pow.h" |
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#include "e_log.h" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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#define pow(x, y) __ieee754_pow(x, y) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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#define log(x) __ieee754_log(x) |
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#endif |
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37 |
|
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#include "SDL_sysvideo.h" |
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39 |
|
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40 |
|
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static void CalculateGammaRamp(float gamma, Uint16 *ramp) |
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42 |
{ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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43 |
int i; |
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44 |
|
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45 |
/* 0.0 gamma is all black */ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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46 |
if ( gamma <= 0.0f ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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47 |
for ( i=0; i<256; ++i ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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48 |
ramp[i] = 0; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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49 |
} |
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50 |
return; |
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51 |
} else |
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52 |
/* 1.0 gamma is identity */ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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53 |
if ( gamma == 1.0f ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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54 |
for ( i=0; i<256; ++i ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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55 |
ramp[i] = (i << 8) | i; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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56 |
} |
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57 |
return; |
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58 |
} else |
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59 |
/* Calculate a real gamma ramp */ |
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60 |
{ int value; |
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61 |
gamma = 1.0f / gamma; |
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62 |
for ( i=0; i<256; ++i ) { |
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63 |
value = (int)(pow((double)i/256.0, gamma)*65535.0+0.5); |
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64 |
if ( value > 65535 ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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65 |
value = 65535; |
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66 |
} |
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67 |
ramp[i] = (Uint16)value; |
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68 |
} |
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69 |
} |
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70 |
} |
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static void CalculateGammaFromRamp(float *gamma, Uint16 *ramp) |
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72 |
{ |
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/* The following is adapted from a post by Garrett Bass on OpenGL |
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74 |
Gamedev list, March 4, 2000. |
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75 |
*/ |
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float sum = 0.0f; |
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int i, count = 0; |
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78 |
|
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*gamma = 1.0; |
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80 |
for ( i = 1; i < 256; ++i ) { |
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parents:
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81 |
if ( (ramp[i] != 0) && (ramp[i] != 65535) ) { |
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82 |
double B = (double)i / 256.0; |
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83 |
double A = ramp[i] / 65535.0; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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84 |
sum += (float) ( log(A) / log(B) ); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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85 |
count++; |
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parents:
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86 |
} |
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87 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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88 |
if ( count && sum > 0.0f ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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89 |
*gamma = 1.0f / (sum / count); |
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parents:
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90 |
} |
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parents:
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91 |
} |
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92 |
|
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93 |
int SDL_SetGamma(float red, float green, float blue) |
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94 |
{ |
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parents:
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95 |
int succeeded; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
96 |
SDL_VideoDevice *video = current_video; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
97 |
SDL_VideoDevice *this = current_video; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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98 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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99 |
succeeded = -1; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
100 |
/* Prefer using SetGammaRamp(), as it's more flexible */ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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101 |
{ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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102 |
Uint16 ramp[3][256]; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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103 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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104 |
CalculateGammaRamp(red, ramp[0]); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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105 |
CalculateGammaRamp(green, ramp[1]); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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106 |
CalculateGammaRamp(blue, ramp[2]); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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107 |
succeeded = SDL_SetGammaRamp(ramp[0], ramp[1], ramp[2]); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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108 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
109 |
if ( (succeeded < 0) && video->SetGamma ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
110 |
SDL_ClearError(); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
111 |
succeeded = video->SetGamma(this, red, green, blue); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
112 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
113 |
return succeeded; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
114 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
115 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
116 |
/* Calculating the gamma by integrating the gamma ramps isn't exact, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
117 |
so this function isn't officially supported. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
118 |
*/ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
119 |
int SDL_GetGamma(float *red, float *green, float *blue) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
120 |
{ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
121 |
int succeeded; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
122 |
SDL_VideoDevice *video = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
123 |
SDL_VideoDevice *this = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
124 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
125 |
succeeded = -1; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
126 |
/* Prefer using GetGammaRamp(), as it's more flexible */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
127 |
{ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
128 |
Uint16 ramp[3][256]; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
129 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
130 |
succeeded = SDL_GetGammaRamp(ramp[0], ramp[1], ramp[2]); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
131 |
if ( succeeded >= 0 ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
132 |
CalculateGammaFromRamp(red, ramp[0]); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
133 |
CalculateGammaFromRamp(green, ramp[1]); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
134 |
CalculateGammaFromRamp(blue, ramp[2]); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
135 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
136 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
137 |
if ( (succeeded < 0) && video->GetGamma ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
138 |
SDL_ClearError(); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
139 |
succeeded = video->GetGamma(this, red, green, blue); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
140 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
141 |
return succeeded; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
142 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
143 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
144 |
int SDL_SetGammaRamp(const Uint16 *red, const Uint16 *green, const Uint16 *blue) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
145 |
{ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
146 |
int succeeded; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
147 |
SDL_VideoDevice *video = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
148 |
SDL_VideoDevice *this = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
149 |
SDL_Surface *screen = SDL_PublicSurface; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
150 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
151 |
/* Verify the screen parameter */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
152 |
if ( !screen ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
153 |
SDL_SetError("No video mode has been set"); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
154 |
return -1; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
155 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
156 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
157 |
/* Lazily allocate the gamma tables */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
158 |
if ( ! video->gamma ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
159 |
SDL_GetGammaRamp(0, 0, 0); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
160 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
161 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
162 |
/* Fill the gamma table with the new values */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
163 |
if ( red ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
164 |
SDL_memcpy(&video->gamma[0*256], red, 256*sizeof(*video->gamma)); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
165 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
166 |
if ( green ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
167 |
SDL_memcpy(&video->gamma[1*256], green, 256*sizeof(*video->gamma)); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
168 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
169 |
if ( blue ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
170 |
SDL_memcpy(&video->gamma[2*256], blue, 256*sizeof(*video->gamma)); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
171 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
172 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
173 |
/* Gamma correction always possible on split palettes */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
174 |
if ( (screen->flags & SDL_HWPALETTE) == SDL_HWPALETTE ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
175 |
SDL_Palette *pal = screen->format->palette; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
176 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
177 |
/* If physical palette has been set independently, use it */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
178 |
if(video->physpal) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
179 |
pal = video->physpal; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
180 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
181 |
SDL_SetPalette(screen, SDL_PHYSPAL, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
182 |
pal->colors, 0, pal->ncolors); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
183 |
return 0; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
184 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
185 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
186 |
/* Try to set the gamma ramp in the driver */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
187 |
succeeded = -1; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
188 |
if ( video->SetGammaRamp ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
189 |
succeeded = video->SetGammaRamp(this, video->gamma); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
190 |
} else { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
191 |
SDL_SetError("Gamma ramp manipulation not supported"); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
192 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
193 |
return succeeded; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
194 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
195 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
196 |
int SDL_GetGammaRamp(Uint16 *red, Uint16 *green, Uint16 *blue) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
197 |
{ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
198 |
SDL_VideoDevice *video = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
199 |
SDL_VideoDevice *this = current_video; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
200 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
201 |
/* Lazily allocate the gamma table */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
202 |
if ( ! video->gamma ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
203 |
video->gamma = SDL_malloc(3*256*sizeof(*video->gamma)); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
204 |
if ( ! video->gamma ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
205 |
SDL_OutOfMemory(); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
206 |
return -1; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
207 |
} |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
208 |
if ( video->GetGammaRamp ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
209 |
/* Get the real hardware gamma */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
210 |
video->GetGammaRamp(this, video->gamma); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
211 |
} else { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
212 |
/* Assume an identity gamma */ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
213 |
int i; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
214 |
for ( i=0; i<256; ++i ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
215 |
video->gamma[0*256+i] = (i << 8) | i; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
216 |
video->gamma[1*256+i] = (i << 8) | i; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
217 |
video->gamma[2*256+i] = (i << 8) | i; |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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218 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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219 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
changeset
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221 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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/* Just copy from our internal table */ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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223 |
if ( red ) { |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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SDL_memcpy(red, &video->gamma[0*256], 256*sizeof(*red)); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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225 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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226 |
if ( green ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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SDL_memcpy(green, &video->gamma[1*256], 256*sizeof(*green)); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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228 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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229 |
if ( blue ) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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SDL_memcpy(blue, &video->gamma[2*256], 256*sizeof(*blue)); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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changeset
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231 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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232 |
return 0; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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233 |
} |