DepthmapRenderer::DepthmapRenderer(int resx, int resy)
{
//First of all: create opengl context:
//res=glm::ivec2(resx,resy);
res=Eigen::Vector2i(resx,resy);
if(counter==0){
//BEGIN OF COPYCAT CODE
static int visual_attribs[] = {
None
};
int context_attribs[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
None
};
dpy = XOpenDisplay(0);
int fbcount = 0;
GLXFBConfig* fbc = NULL;
GLXPbuffer pbuf;
/* open display */
if ( ! (dpy = XOpenDisplay(0)) ){
fprintf(stderr, "Failed to open display\n");
exit(1);
}
/* get framebuffer configs, any is usable (might want to add proper attribs) */
if ( !(fbc = glXChooseFBConfig(dpy, DefaultScreen(dpy), visual_attribs, &fbcount) ) ){
fprintf(stderr, "Failed to get FBConfig\n");
exit(1);
}
/* get the required extensions */
glXCreateContextAttribsARB = (glXCreateContextAttribsARBProc)glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB");
glXMakeContextCurrentARB = (glXMakeContextCurrentARBProc)glXGetProcAddressARB( (const GLubyte *) "glXMakeContextCurrent");
if ( !(glXCreateContextAttribsARB && glXMakeContextCurrentARB) ){
fprintf(stderr, "missing support for GLX_ARB_create_context\n");
XFree(fbc);
exit(1);
}
/* create a context using glXCreateContextAttribsARB */
if ( !( ctx = glXCreateContextAttribsARB(dpy, fbc[0], 0, True, context_attribs)) ){
fprintf(stderr, "Failed to create opengl context\n");
XFree(fbc);
exit(1);
}
/* create temporary pbuffer */
int pbuffer_attribs[] = {
GLX_PBUFFER_WIDTH, 800,
GLX_PBUFFER_HEIGHT, 600,
None
};
pbuf = glXCreatePbuffer(dpy, fbc[0], pbuffer_attribs);
XFree(fbc);
XSync(dpy, False);
/* try to make it the current context */
if ( !glXMakeContextCurrent(dpy, pbuf, pbuf, ctx) ){
/* some drivers does not support context without default framebuffer, so fallback on
* using the default window.
*/
if ( !glXMakeContextCurrent(dpy, DefaultRootWindow(dpy), DefaultRootWindow(dpy), ctx) ){
fprintf(stderr, "failed to make current\n");
exit(1);
}
}
/* try it out */
// printf("vendor: %s\n", (const char*)glGetString(GL_VENDOR));
//END OF COPYCATCODE
}
counter++;
GLenum err=glewInit();
if(err!=GLEW_OK){
std::stringstream s; s << "glewInit failed, aborting. " << err;
throw std::runtime_error(s.str());
}
glGetError();
//create framebuffer:
//Hardcoded shader:
const char *vertex=
"#version 450 \n\
in vec4 pos;\n\
out vec4 colorIn;\n\
void main(){\n\
gl_Position=vec4(pos.xyz,1);\n\
colorIn=unpackUnorm4x8(floatBitsToUint(pos.w));\n\
}";
void PacketData::write32f(float value)
{
write32(floatBitsToUint(value));
}