What OS are you using?
Shai
On 3/7/07, jack3 <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I met a problem with GLWindow. My aim is to use GLWindow to rendering Video(
> a serial image). the problem is redraw looks doesn't work as I thought. it
> became very slow and noneupdated.
>
> Basically, my way is inherit a class glCanvas from GLWindow and override the
> function of draw_overlay and draw.
>
> then, I have a thread to continuely read image from network and call
> redraw_overlay.
>
> Finally,draw_overlay should be called to refresh the image on the window.
>
> But I just noticed that window refreshed only when window has focus and mouse
> event on them. And the performance looks really bad.
>
> Can anyone give me a clue?
>
> Thanks first.
>
> ==================my code ==================
>
> #include <stdlib.h>
> #include <assert.h>
> #include "VTGLCanvas.h"
> #include <fltk/gl.h>
> #include <fltk/draw.h>
> using namespace fltk;
> VTGLCanvas::VTGLCanvas(int w,int h,const char *l)
> :GlWindow(0,0,w,h,l)
> { //mode(mode()|fltk::RGB|fltk::NO_AUTO_SWAP|fltk::NO_ERASE_OVERLAY);
> m_nWidth=nWidth;
> m_nHeight=nHeight;
> m_nBitCount=nBitCount;
> m_pFrameData=new char[nFrameSize+1280+1024];
> }
> VTGLCanvas::~VTGLCanvas()
> {
> }
>
>
> void VTGLCanvas::ThreadProcMain(void)
> {
> while (!m_bWantToStop)
> {
> mySleep(30);
> ////////////////////
> {
> CAVAutoLock lock(&m_CritSecList);
> m_pFrameData=readfromnetwork();
> redraw_overlay();
> }
> }
> }
>
> void VTGLCanvas::draw()
> {
> }
> void VTGLCanvas::draw_overlay()
> {
> // the valid() property may be used to avoid reinitializing your
> // GL transformation for each redraw:
> if (!valid())
> {
> valid(1);
> glLoadIdentity();
> glViewport(0,0,w(),h());
> }
> // glBegin();
> glClearColor(0,0,0,0);
> glClear(GL_COLOR_BUFFER_BIT);
> CAVAutoLock lock(&m_CritSecData);
>
> glDrawPixels(m_nWidth,m_nHeight,GL_BGR_EXT,GL_UNSIGNED_BYTE,m_pFrameData);
> swap_buffers();
> // glEnd();
> /*
>
> glTexSubImage2D(GL_TEXTURE_2D,0,0,0,m_nWidth,m_nHeight,GL_RGB,GL_UNSIGNED_BYTE,m_pFrameData);
> */
>
>
> }
>
> _______________________________________________
> fltk-opengl mailing list
> [email protected]
> http://lists.easysw.com/mailman/listinfo/fltk-opengl
>
_______________________________________________
fltk-opengl mailing list
[email protected]
http://lists.easysw.com/mailman/listinfo/fltk-opengl
