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annotate test/testdyngl.c @ 1180:bdcb8bb4c831

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From: Tyler Montbriand <tsm@accesscomm.ca> To: sdl@libsdl.org Date: Fri, 30 Sep 2005 02:24:50 -0600 Subject: [SDL] WinCE timers, continued Here's a strange timer for Windows CE that doesn't ignore time across suspends. It uses GetSystemTime to keep the time continuous, and GetTicks to get finer-grained readings than 1 second. It detects the difference between the GetTicks time and GetSystemTime time on power-on to keep the error within one second max. It's not a patch on the current win32 timer code -- took one look at that and figured it had more than enough #ifdefs already. It's windows-ce specific. Another thing I've noticed is that the Windows CE 4.0 and newer API has functions warn processes about suspends. This is something SDL REALLY needs for audio in particular, because turning it off while it's playing causes anything that uses audio to hardlock the system on power-on. Unfortunately I don't have 4.0 to play with. :(
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 22 Nov 2005 07:10:07 +0000
parents be9c9c8f6d53
children 2b7e0180a72c
rev   line source
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1 /*
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2 * Small SDL example to demonstrate dynamically loading
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3 * OpenGL lib and functions
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4 *
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5 * (FYI it was supposed to look like snow in the wind or something...)
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6 *
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7 * Compile with :
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0afe0e38e02c *** empty log message ***
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8 * gcc testdyngl.c `sdl-config --libs --cflags` -o testdyngl -DHAVE_OPENGL
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9 *
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10 * You can specify a different OpenGL lib on the command line, i.e. :
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11 * ./testdyngl /usr/X11R6/lib/libGL.so.1.2
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12 * or
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13 * ./testdyngl /usr/lib/libGL.so.1.0.4496
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14 *
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15 */
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16
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17 #include <stdio.h>
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18 #include <stdlib.h>
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19
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20 #include "SDL.h"
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21
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22 #ifdef HAVE_OPENGL
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23
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24 #include "SDL_opengl.h"
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25
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26 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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27 static void quit(int rc)
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28 {
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29 SDL_Quit();
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30 exit(rc);
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31 }
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32
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33 void* get_funcaddr(const char* p)
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34 {
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35 void* f=SDL_GL_GetProcAddress(p);
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36 if (f)
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37 {
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38 return f;
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39 }
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40 else
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41 {
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42 printf("Unable to get function pointer for %s\n",p);
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43 quit(1);
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44 }
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45 }
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46
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47 typedef struct
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48 {
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49 void(APIENTRY*glBegin)(GLenum);
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50 void(APIENTRY*glEnd)();
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51 void(APIENTRY*glVertex3f)(GLfloat, GLfloat, GLfloat);
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52 void(APIENTRY*glClearColor)(GLfloat, GLfloat, GLfloat, GLfloat);
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53 void(APIENTRY*glClear)(GLbitfield);
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54 void(APIENTRY*glDisable)(GLenum);
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55 void(APIENTRY*glEnable)(GLenum);
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56 void(APIENTRY*glColor4ub)(GLubyte,GLubyte,GLubyte,GLubyte);
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57 void(APIENTRY*glPointSize)(GLfloat);
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58 void(APIENTRY*glHint)(GLenum,GLenum);
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59 void(APIENTRY*glBlendFunc)(GLenum,GLenum);
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60 void(APIENTRY*glMatrixMode)(GLenum);
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61 void(APIENTRY*glLoadIdentity)();
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62 void(APIENTRY*glOrtho)(GLdouble,GLdouble,GLdouble,GLdouble,GLdouble,GLdouble);
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63 void(APIENTRY*glRotatef)(GLfloat,GLfloat,GLfloat,GLfloat);
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64 void(APIENTRY*glViewport)(GLint,GLint,GLsizei,GLsizei);
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65 void(APIENTRY*glFogf)(GLenum,GLfloat);
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66 }
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67 glfuncs;
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68
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69 void init_glfuncs(glfuncs* f)
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70 {
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71 f->glBegin=get_funcaddr("glBegin");
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72 f->glEnd=get_funcaddr("glEnd");
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73 f->glVertex3f=get_funcaddr("glVertex3f");
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74 f->glClearColor=get_funcaddr("glClearColor");
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75 f->glClear=get_funcaddr("glClear");
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76 f->glDisable=get_funcaddr("glDisable");
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77 f->glEnable=get_funcaddr("glEnable");
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78 f->glColor4ub=get_funcaddr("glColor4ub");
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79 f->glPointSize=get_funcaddr("glPointSize");
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80 f->glHint=get_funcaddr("glHint");
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81 f->glBlendFunc=get_funcaddr("glBlendFunc");
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82 f->glMatrixMode=get_funcaddr("glMatrixMode");
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83 f->glLoadIdentity=get_funcaddr("glLoadIdentity");
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84 f->glOrtho=get_funcaddr("glOrtho");
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85 f->glRotatef=get_funcaddr("glRotatef");
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86 f->glViewport=get_funcaddr("glViewport");
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87 f->glFogf=get_funcaddr("glFogf");
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88 }
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89
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90 #define NB_PIXELS 1000
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91
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92 int main(int argc,char *argv[])
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93 {
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94 glfuncs f;
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95 int i;
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96 SDL_Event event;
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97 int done=0;
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98 GLfloat pixels[NB_PIXELS*3];
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99 #if defined(_WIN32)
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100 char *gl_library = "OpenGL32.DLL";
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101 #elif defined(__QNXNTO__)
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102 char *gl_library = "libGL.so.3";
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103 #else
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104 char *gl_library = "libGL.so.1";
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105 #endif
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106
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107 if (argv[1]) {
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108 gl_library = argv[1];
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109 }
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110
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111 if (SDL_Init(SDL_INIT_VIDEO)<0)
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112 {
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113 printf("Unable to init SDL : %s\n",SDL_GetError());
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114 return(1);
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115 }
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116
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117 if (SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1)<0)
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118 {
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119 printf("Unable to set GL attribute : %s\n",SDL_GetError());
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120 quit(1);
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121 }
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122
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123 if (SDL_GL_LoadLibrary(gl_library)<0)
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124 {
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125 printf("Unable to dynamically open GL lib : %s\n",SDL_GetError());
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126 quit(1);
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127 }
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128
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129 if (SDL_SetVideoMode(640,480,0,SDL_OPENGL)==NULL)
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130 {
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131 printf("Unable to open video mode : %s\n",SDL_GetError());
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132 quit(1);
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133 }
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134
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135 /* Set the window manager title bar */
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136 SDL_WM_SetCaption( "SDL Dynamic OpenGL Loading Test", "testdyngl" );
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137
839
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138 init_glfuncs(&f);
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139
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140 for(i=0;i<NB_PIXELS;i++)
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141 {
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142 pixels[3*i]=rand()%250-125;
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143 pixels[3*i+1]=rand()%250-125;
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144 pixels[3*i+2]=rand()%250-125;
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145 }
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146
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147 f.glViewport(0,0,640,480);
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148
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149 f.glMatrixMode(GL_PROJECTION);
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150 f.glLoadIdentity();
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151 f.glOrtho(-100,100,-100,100,-500,500);
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152
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153 f.glMatrixMode(GL_MODELVIEW);
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154 f.glLoadIdentity();
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155
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156 f.glEnable(GL_DEPTH_TEST);
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157 f.glDisable(GL_TEXTURE_2D);
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158 f.glEnable(GL_BLEND);
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159 f.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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160
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161 f.glClearColor(0.0f,0.0f,0.0f,0.0f);
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162 f.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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163
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164 f.glEnable(GL_POINT_SMOOTH);
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165 f.glHint(GL_POINT_SMOOTH_HINT,GL_NICEST);
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166 f.glPointSize(5.0f);
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167 f.glEnable(GL_FOG);
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168 f.glFogf(GL_FOG_START,-500);
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169 f.glFogf(GL_FOG_END,500);
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170 f.glFogf(GL_FOG_DENSITY,0.005);
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171
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172 do
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173 {
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174 f.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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175
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176 f.glRotatef(2.0,1.0,1.0,1.0);
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177 f.glRotatef(1.0,0.0,1.0,1.0);
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178
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179 f.glColor4ub(255,255,255,255);
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180 f.glBegin(GL_POINTS);
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181 for(i=0;i<NB_PIXELS;i++)
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182 {
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183 f.glVertex3f(pixels[3*i],pixels[3*i+1],pixels[3*i+2]);
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184 }
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185 f.glEnd();
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186 SDL_GL_SwapBuffers();
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187
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188 while(SDL_PollEvent(&event))
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189 {
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190 if(event.type & SDL_KEYDOWN)
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191 done=1;
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192 }
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193
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194 SDL_Delay(20);
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195 }
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196 while(!done);
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197
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198 SDL_Quit();
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199 return 0;
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200 }
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201
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202 #else /* HAVE_OPENGL */
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203
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204 int main(int argc, char *argv[])
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205 {
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206 printf("No OpenGL support on this system\n");
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207 return 1;
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208 }
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209
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210 #endif /* HAVE_OPENGL */