1 | // |
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2 | // Deus Hax (working title) |
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3 | // Copyright (c) 2010 Sam Hocevar <sam@hocevar.net> |
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4 | // |
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5 | |
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6 | #if defined HAVE_CONFIG_H |
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7 | # include "config.h" |
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8 | #endif |
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9 | |
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10 | #include <cstdlib> |
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11 | |
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12 | #include <gtk/gtk.h> |
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13 | #include <gtkgl/gtkglarea.h> |
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14 | |
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15 | #ifdef WIN32 |
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16 | # define WIN32_LEAN_AND_MEAN |
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17 | # include <windows.h> |
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18 | #endif |
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19 | #if defined __APPLE__ && defined __MACH__ |
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20 | # include <OpenGL/gl.h> |
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21 | #else |
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22 | # define GL_GLEXT_PROTOTYPES |
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23 | # include <GL/gl.h> |
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24 | #endif |
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25 | |
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26 | #include "gtkvideo.h" |
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27 | |
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28 | /* |
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29 | * Gtk Video implementation class |
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30 | */ |
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31 | |
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32 | class GtkVideoData |
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33 | { |
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34 | friend class GtkVideo; |
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35 | |
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36 | private: |
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37 | void SetupView() |
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38 | { |
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39 | glViewport(0, 0, widget->allocation.width, |
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40 | widget->allocation.height); |
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41 | |
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42 | glMatrixMode(GL_PROJECTION); |
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43 | glLoadIdentity(); |
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44 | glOrtho(0, widget->allocation.width, |
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45 | widget->allocation.height, 0, -1, 10); |
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46 | glMatrixMode(GL_MODELVIEW); |
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47 | glLoadIdentity(); |
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48 | |
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49 | glEnable(GL_TEXTURE_2D); |
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50 | glShadeModel(GL_SMOOTH); |
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51 | glClearColor(0.0f, 0.0f, 0.0f, 0.0f); |
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52 | glClearDepth(1.0); |
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53 | glEnable(GL_DEPTH_TEST); |
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54 | glDepthFunc(GL_LEQUAL); |
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55 | glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); |
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56 | |
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57 | glEnable(GL_BLEND); |
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58 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
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59 | } |
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60 | |
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61 | static gint init(GtkWidget *widget) |
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62 | { |
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63 | GtkVideoData *data = (GtkVideoData *) |
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64 | gtk_object_get_data(GTK_OBJECT(widget), "data"); |
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65 | |
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66 | /* OpenGL functions can be called only if make_current returns true */ |
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67 | if (gtk_gl_area_make_current(GTK_GL_AREA(widget))) |
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68 | { |
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69 | data->SetupView(); |
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70 | } |
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71 | return TRUE; |
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72 | } |
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73 | |
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74 | static gint draw(GtkWidget *widget, GdkEventExpose *event) |
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75 | { |
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76 | GtkVideoData *data = (GtkVideoData *) |
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77 | gtk_object_get_data(GTK_OBJECT(widget), "data"); |
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78 | |
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79 | if (event->count == 0 && data->drawing == 2 |
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80 | && gtk_gl_area_make_current(GTK_GL_AREA(widget))) |
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81 | { |
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82 | data->drawing = 0; |
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83 | |
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84 | /* Swap backbuffer to front */ |
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85 | gtk_gl_area_swapbuffers(GTK_GL_AREA(widget)); |
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86 | } |
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87 | |
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88 | return TRUE; |
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89 | } |
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90 | |
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91 | static gint reshape(GtkWidget *widget, GdkEventConfigure *event) |
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92 | { |
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93 | GtkVideoData *data = (GtkVideoData *) |
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94 | gtk_object_get_data(GTK_OBJECT(widget), "data"); |
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95 | |
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96 | if (gtk_gl_area_make_current(GTK_GL_AREA(widget))) |
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97 | { |
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98 | data->SetupView(); |
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99 | } |
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100 | return TRUE; |
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101 | } |
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102 | |
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103 | GtkWidget *widget; |
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104 | int drawing; |
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105 | }; |
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106 | |
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107 | /* |
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108 | * Public GtkVideo class |
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109 | */ |
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110 | |
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111 | GtkVideo::GtkVideo(char const *title, int width, int height) |
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112 | { |
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113 | data = new GtkVideoData(); |
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114 | |
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115 | int attrlist[] = |
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116 | { |
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117 | GDK_GL_RGBA, |
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118 | GDK_GL_RED_SIZE, 1, |
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119 | GDK_GL_GREEN_SIZE, 1, |
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120 | GDK_GL_BLUE_SIZE, 1, |
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121 | GDK_GL_DOUBLEBUFFER, |
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122 | GDK_GL_NONE |
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123 | }; |
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124 | |
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125 | if (gdk_gl_query() == FALSE) |
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126 | { |
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127 | // FIXME: implement a panic() mode |
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128 | g_print("OpenGL not supported\n"); |
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129 | exit(1); |
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130 | } |
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131 | |
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132 | data->widget = gtk_gl_area_new(attrlist); |
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133 | data->drawing = 0; |
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134 | |
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135 | gtk_object_set_data(GTK_OBJECT(data->widget), "data", data); |
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136 | gtk_widget_set_events(GTK_WIDGET(data->widget), |
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137 | GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK); |
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138 | |
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139 | gtk_signal_connect(GTK_OBJECT(data->widget), "expose_event", |
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140 | GTK_SIGNAL_FUNC(GtkVideoData::draw), NULL); |
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141 | gtk_signal_connect(GTK_OBJECT(data->widget), "configure_event", |
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142 | GTK_SIGNAL_FUNC(GtkVideoData::reshape), NULL); |
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143 | gtk_signal_connect(GTK_OBJECT(data->widget), "realize", |
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144 | GTK_SIGNAL_FUNC(GtkVideoData::init), NULL); |
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145 | |
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146 | // FIXME: is this needed? |
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147 | gtk_widget_set_usize(GTK_WIDGET(data->widget), 400, 300); |
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148 | } |
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149 | |
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150 | void *GtkVideo::GetWidget() |
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151 | { |
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152 | return data->widget; |
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153 | } |
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154 | |
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155 | int GtkVideo::GetWidth() const |
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156 | { |
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157 | return data->widget->allocation.width; |
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158 | } |
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159 | |
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160 | int GtkVideo::GetHeight() const |
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161 | { |
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162 | return data->widget->allocation.height; |
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163 | } |
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164 | |
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165 | void GtkVideo::PreRender() |
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166 | { |
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167 | /// XXX: is this right? |
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168 | gtk_gl_area_make_current(GTK_GL_AREA(data->widget)); |
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169 | |
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170 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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171 | glLoadIdentity(); |
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172 | |
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173 | data->drawing = 1; |
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174 | } |
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175 | |
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176 | void GtkVideo::PostRender(float milliseconds) |
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177 | { |
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178 | data->drawing = 2; |
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179 | |
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180 | gtk_widget_draw(GTK_WIDGET(data->widget), NULL); |
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181 | #if 0 |
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182 | if (milliseconds > 0.0f) |
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183 | while (SDL_GetTicks() < data->ticks + (milliseconds - 0.5f)) |
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184 | SDL_Delay(1); |
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185 | data->ticks = SDL_GetTicks(); |
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186 | data->frames++; |
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187 | |
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188 | SDL_GL_SwapBuffers(); |
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189 | #endif |
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190 | } |
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191 | |
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192 | void GtkVideo::FullScreen() |
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193 | { |
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194 | // FIXME |
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195 | } |
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196 | |
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197 | GtkVideo::~GtkVideo() |
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198 | { |
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199 | // FIXME |
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200 | } |
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201 | |
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