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annotate test/testdyngl.c @ 4391:07b330419439 SDL-1.2

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Fixed bug #849 some more: Tim Angus 2009-11-26 14:41:04 PST Fix to the cursor not being responsive when the app doesn't have SDL_APPINPUTFOCUS The problems with the directx driver are similar to the ones I introduced in the windib driver with r4478. Basically if the application did not have focus, the mouse position is not updated. It's not really that the mouse cursor was invisible, it's that it is stuck underneath another window where you can't see it. This behaviour predates my r4478 changes and is the reason I unwittingly broke the windib driver as I had been replicating the way the directx driver deals with focus. Prior to r4478 the directx driver could not be used in windowed mode, so the broken focusing would not have actually been observable. Anyway, the attached patch makes the directx driver behaves like the windib driver in terms of focus. Time for 1.2.15? ;) I've added an additional change of moving the calls to WIN_GrabInput that are made on WM_ACTIVATE messages so that they only occur when the state is SDL_APPINPUTFOCUS. When a fullscreen application is minimised using alt-tab, it still receives WM_ACTIVATE messages when other applications are selected. If WIN_GrabInput is called when the SDL application doesn't have input focus, bad things happen; it shouldn't be being called at all. I've also added a line to make sure that SDL_APPMOUSEFOCUS state is dropped when the application is minimised following an alt-tab.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 15:24:53 +0000
parents 871090feb7ad
children 782fd950bd46 c121d94672cb
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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 __MACOS__
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23 #define HAVE_OPENGL
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24 #endif
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25
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26 #ifdef HAVE_OPENGL
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27
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28 #include "SDL_opengl.h"
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29
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30 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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31 static void quit(int rc)
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32 {
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33 SDL_Quit();
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34 exit(rc);
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35 }
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36
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37 void* get_funcaddr(const char* p)
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38 {
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39 void* f=SDL_GL_GetProcAddress(p);
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40 if (f)
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41 {
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42 return f;
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43 }
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44 else
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45 {
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46 printf("Unable to get function pointer for %s\n",p);
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47 quit(1);
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48 }
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49 return NULL;
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50 }
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51
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52 typedef struct
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53 {
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54 void(APIENTRY*glBegin)(GLenum);
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55 void(APIENTRY*glEnd)();
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56 void(APIENTRY*glVertex3f)(GLfloat, GLfloat, GLfloat);
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57 void(APIENTRY*glClearColor)(GLfloat, GLfloat, GLfloat, GLfloat);
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58 void(APIENTRY*glClear)(GLbitfield);
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59 void(APIENTRY*glDisable)(GLenum);
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60 void(APIENTRY*glEnable)(GLenum);
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61 void(APIENTRY*glColor4ub)(GLubyte,GLubyte,GLubyte,GLubyte);
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62 void(APIENTRY*glPointSize)(GLfloat);
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63 void(APIENTRY*glHint)(GLenum,GLenum);
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64 void(APIENTRY*glBlendFunc)(GLenum,GLenum);
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65 void(APIENTRY*glMatrixMode)(GLenum);
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66 void(APIENTRY*glLoadIdentity)();
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67 void(APIENTRY*glOrtho)(GLdouble,GLdouble,GLdouble,GLdouble,GLdouble,GLdouble);
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68 void(APIENTRY*glRotatef)(GLfloat,GLfloat,GLfloat,GLfloat);
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69 void(APIENTRY*glViewport)(GLint,GLint,GLsizei,GLsizei);
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70 void(APIENTRY*glFogf)(GLenum,GLfloat);
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71 }
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72 glfuncs;
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73
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74 void init_glfuncs(glfuncs* f)
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75 {
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76 f->glBegin=get_funcaddr("glBegin");
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77 f->glEnd=get_funcaddr("glEnd");
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78 f->glVertex3f=get_funcaddr("glVertex3f");
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79 f->glClearColor=get_funcaddr("glClearColor");
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80 f->glClear=get_funcaddr("glClear");
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81 f->glDisable=get_funcaddr("glDisable");
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82 f->glEnable=get_funcaddr("glEnable");
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83 f->glColor4ub=get_funcaddr("glColor4ub");
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84 f->glPointSize=get_funcaddr("glPointSize");
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85 f->glHint=get_funcaddr("glHint");
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86 f->glBlendFunc=get_funcaddr("glBlendFunc");
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87 f->glMatrixMode=get_funcaddr("glMatrixMode");
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88 f->glLoadIdentity=get_funcaddr("glLoadIdentity");
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89 f->glOrtho=get_funcaddr("glOrtho");
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90 f->glRotatef=get_funcaddr("glRotatef");
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91 f->glViewport=get_funcaddr("glViewport");
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92 f->glFogf=get_funcaddr("glFogf");
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93 }
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94
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95 #define NB_PIXELS 1000
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96
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97 int main(int argc,char *argv[])
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98 {
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99 glfuncs f;
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100 int i;
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101 SDL_Event event;
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102 int done=0;
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103 GLfloat pixels[NB_PIXELS*3];
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104 const char *gl_library = NULL; /* Use the default GL library */
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105
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106 if (argv[1]) {
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107 gl_library = argv[1];
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108 }
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109
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110 if (SDL_Init(SDL_INIT_VIDEO)<0)
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111 {
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112 printf("Unable to init SDL : %s\n",SDL_GetError());
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113 return(1);
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114 }
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115
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116 if (SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1)<0)
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117 {
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118 printf("Unable to set GL attribute : %s\n",SDL_GetError());
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119 quit(1);
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120 }
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121
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122 if (SDL_GL_LoadLibrary(gl_library)<0)
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123 {
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124 printf("Unable to dynamically open GL lib : %s\n",SDL_GetError());
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125 quit(1);
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126 }
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127
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128 if (SDL_SetVideoMode(640,480,0,SDL_OPENGL)==NULL)
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129 {
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130 printf("Unable to open video mode : %s\n",SDL_GetError());
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131 quit(1);
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132 }
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133
910
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134 /* Set the window manager title bar */
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135 SDL_WM_SetCaption( "SDL Dynamic OpenGL Loading Test", "testdyngl" );
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136
839
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137 init_glfuncs(&f);
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138
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139 for(i=0;i<NB_PIXELS;i++)
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140 {
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141 pixels[3*i]=rand()%250-125;
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142 pixels[3*i+1]=rand()%250-125;
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143 pixels[3*i+2]=rand()%250-125;
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144 }
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145
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146 f.glViewport(0,0,640,480);
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147
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148 f.glMatrixMode(GL_PROJECTION);
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149 f.glLoadIdentity();
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150 f.glOrtho(-100,100,-100,100,-500,500);
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151
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152 f.glMatrixMode(GL_MODELVIEW);
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153 f.glLoadIdentity();
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154
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155 f.glEnable(GL_DEPTH_TEST);
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156 f.glDisable(GL_TEXTURE_2D);
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157 f.glEnable(GL_BLEND);
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158 f.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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159
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160 f.glClearColor(0.0f,0.0f,0.0f,0.0f);
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161 f.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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162
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163 f.glEnable(GL_POINT_SMOOTH);
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164 f.glHint(GL_POINT_SMOOTH_HINT,GL_NICEST);
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165 f.glPointSize(5.0f);
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166 f.glEnable(GL_FOG);
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167 f.glFogf(GL_FOG_START,-500);
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168 f.glFogf(GL_FOG_END,500);
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169 f.glFogf(GL_FOG_DENSITY,0.005);
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170
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171 do
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172 {
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173 f.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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174
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175 f.glRotatef(2.0,1.0,1.0,1.0);
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176 f.glRotatef(1.0,0.0,1.0,1.0);
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177
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178 f.glColor4ub(255,255,255,255);
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179 f.glBegin(GL_POINTS);
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180 for(i=0;i<NB_PIXELS;i++)
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181 {
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182 f.glVertex3f(pixels[3*i],pixels[3*i+1],pixels[3*i+2]);
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183 }
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184 f.glEnd();
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185 SDL_GL_SwapBuffers();
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186
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187 while(SDL_PollEvent(&event))
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188 {
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189 if(event.type & SDL_KEYDOWN)
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190 done=1;
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191 }
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192
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193 SDL_Delay(20);
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194 }
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195 while(!done);
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196
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197 SDL_Quit();
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198 return 0;
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199 }
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200
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201 #else /* HAVE_OPENGL */
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202
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203 int main(int argc, char *argv[])
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204 {
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205 printf("No OpenGL support on this system\n");
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206 return 1;
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207 }
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208
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209 #endif /* HAVE_OPENGL */