Mercurial > sdl-ios-xcode

annotate src/video/win32/SDL_win32video.c @ 2042:3908e1f808e1

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:56:36 +0000
parents 420716272158
children 44e49d3fa6cf abc8acb8e3d7
rev   line source
1895
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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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_main.h"
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25 #include "SDL_video.h"
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26 #include "SDL_mouse.h"
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27 #include "../SDL_sysvideo.h"
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28 #include "../SDL_pixels_c.h"
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29
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30 #include "SDL_win32video.h"
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31 #include "SDL_d3drender.h"
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32 #include "SDL_gdirender.h"
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33
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34 /* Initialization/Query functions */
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35 static int WIN_VideoInit(_THIS);
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36 static void WIN_VideoQuit(_THIS);
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37
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38 /* WIN32 driver bootstrap functions */
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39
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40 static int
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41 WIN_Available(void)
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42 {
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43 return (1);
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44 }
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45
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46 static void
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47 WIN_DeleteDevice(SDL_VideoDevice * device)
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48 {
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49 SDL_VideoData *data = (SDL_VideoData *) device->driverdata;
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50
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51 SDL_UnregisterApp();
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52 #if SDL_VIDEO_RENDER_D3D
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53 if (data->d3d) {
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54 IDirect3D9_Release(data->d3d);
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55 FreeLibrary(data->d3dDLL);
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56 }
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57 #endif
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58 SDL_free(device->driverdata);
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59 SDL_free(device);
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60 }
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61
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62 static SDL_VideoDevice *
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63 WIN_CreateDevice(int devindex)
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64 {
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65 SDL_VideoDevice *device;
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66 SDL_VideoData *data;
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67
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68 SDL_RegisterApp(NULL, 0, NULL);
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69
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70 /* Initialize all variables that we clean on shutdown */
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71 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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72 if (device) {
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73 data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
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74 }
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75 if (!device || !data) {
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76 SDL_OutOfMemory();
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77 if (device) {
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78 SDL_free(device);
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79 }
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80 return NULL;
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81 }
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82 device->driverdata = data;
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83
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84 #if SDL_VIDEO_RENDER_D3D
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85 data->d3dDLL = LoadLibrary(TEXT("D3D9.DLL"));
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86 if (data->d3dDLL) {
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87 IDirect3D9 *(WINAPI * D3DCreate) (UINT SDKVersion);
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88
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89 D3DCreate =
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90 (IDirect3D9 * (WINAPI *) (UINT)) GetProcAddress(data->d3dDLL,
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91 "Direct3DCreate9");
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92 if (D3DCreate) {
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93 data->d3d = D3DCreate(D3D_SDK_VERSION);
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94 }
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95 if (!data->d3d) {
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96 FreeLibrary(data->d3dDLL);
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97 data->d3dDLL = NULL;
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98 }
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99 }
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100 #endif /* SDL_VIDEO_RENDER_D3D */
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101
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102 /* Set the function pointers */
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103 device->VideoInit = WIN_VideoInit;
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104 device->VideoQuit = WIN_VideoQuit;
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105 device->GetDisplayModes = WIN_GetDisplayModes;
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106 device->SetDisplayMode = WIN_SetDisplayMode;
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107 device->SetDisplayGammaRamp = WIN_SetDisplayGammaRamp;
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108 device->GetDisplayGammaRamp = WIN_GetDisplayGammaRamp;
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109 device->PumpEvents = WIN_PumpEvents;
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110
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111 #undef CreateWindow
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112 device->CreateWindow = WIN_CreateWindow;
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113 device->CreateWindowFrom = WIN_CreateWindowFrom;
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114 device->SetWindowTitle = WIN_SetWindowTitle;
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115 device->SetWindowPosition = WIN_SetWindowPosition;
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116 device->SetWindowSize = WIN_SetWindowSize;
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117 device->ShowWindow = WIN_ShowWindow;
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118 device->HideWindow = WIN_HideWindow;
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119 device->RaiseWindow = WIN_RaiseWindow;
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120 device->MaximizeWindow = WIN_MaximizeWindow;
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121 device->MinimizeWindow = WIN_MinimizeWindow;
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122 device->RestoreWindow = WIN_RestoreWindow;
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123 device->SetWindowGrab = WIN_SetWindowGrab;
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124 device->DestroyWindow = WIN_DestroyWindow;
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125 device->GetWindowWMInfo = WIN_GetWindowWMInfo;
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420716272158 Implemented X11 OpenGL support.
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126 #ifdef SDL_VIDEO_OPENGL_WGL
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127 device->GL_LoadLibrary = WIN_GL_LoadLibrary;
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128 device->GL_GetProcAddress = WIN_GL_GetProcAddress;
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129 device->GL_CreateContext = WIN_GL_CreateContext;
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130 device->GL_MakeCurrent = WIN_GL_MakeCurrent;
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131 device->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
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132 device->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
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133 device->GL_SwapWindow = WIN_GL_SwapWindow;
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134 device->GL_DeleteContext = WIN_GL_DeleteContext;
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135 #endif
1895
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136
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137 device->free = WIN_DeleteDevice;
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138
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139 return device;
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140 }
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141
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142 VideoBootStrap WIN32_bootstrap = {
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143 "win32", "SDL Win32/64 video driver",
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144 WIN_Available, WIN_CreateDevice
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145 };
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146
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147
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148 int
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149 WIN_VideoInit(_THIS)
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150 {
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151 WIN_InitModes(_this);
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152
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36d52b1f0504 Prefer the D3D renderer over GDI, at least for testing.
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153 #if SDL_VIDEO_RENDER_D3D
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154 D3D_AddRenderDriver(_this);
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155 #endif
1895
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156 #if SDL_VIDEO_RENDER_GDI
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157 GDI_AddRenderDriver(_this);
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158 #endif
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159
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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160 WIN_InitKeyboard(_this);
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161 WIN_InitMouse(_this);
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162
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163 return 0;
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164 }
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165
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166 void
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167 WIN_VideoQuit(_THIS)
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168 {
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169 WIN_QuitModes(_this);
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170 WIN_QuitKeyboard(_this);
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171 WIN_QuitMouse(_this);
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172 }
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173
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174 /* vim: set ts=4 sw=4 expandtab: */