i tried to profile mesa by adding -pg to the cflags and then run gears
but only calls in gears are listed in gmon.out.. what did i do wrong ?
and..
culling looks like broken.. i wrote this little (attached) test prog and
nearly all polys are drawn.. the polygon line mode looks broken too
compared to the output from mesa 3.0 .. :(
--
ralf willenbacher ([EMAIL PROTECTED])
/* $Id: glxdemo.c,v 3.0 1998/02/21 02:16:54 brianp Exp $ */
/*
* A demonstration of using the GLX functions. This program is in the
* public domain.
*
* Brian Paul
*/
/*
* $Log: glxdemo.c,v $
* Revision 3.0 1998/02/21 02:16:54 brianp
* initial rev
*
*/
#include <GL/gl.h>
#include <GL/glx.h>
#include <stdio.h>
#include <stdlib.h>
unsigned char texture[] = { 0, 0, 0, 63, 63, 63, 127, 127, 127, 255, 255, 255,
0, 0, 0, 63, 0, 63, 127, 0, 127, 255, 0, 255,
0, 0, 0, 0, 63, 63, 0, 127, 127, 0, 255, 255,
0, 0, 0, 63, 63, 0, 127, 127, 0, 255, 255, 0};
void draw_clockwise_polygon(float x, float y, float scale)
{
glBegin(GL_POLYGON);
glTexCoord2f(0.0, 0.0);
glVertex2f((-1.0*scale)+x, (1.0*scale)+y);
glTexCoord2f(1.0, 0.0);
glVertex2f((1.0*scale)+x, (1.0*scale)+y);
glTexCoord2f(1.0, 1.0);
glVertex2f((1.0*scale)+x, (-1.0*scale)+y);
glTexCoord2f(0.0, 1.0);
glVertex2f((-1.0*scale)+x, (-1.0*scale)+y);
glEnd();
}
void draw_counterclockwise_polygon(float x, float y, float scale)
{
glBegin(GL_POLYGON);
glTexCoord2f(0.0, 0.0);
glVertex2f((-1.0*scale)+x, (1.0*scale)+y);
glTexCoord2f(0.0, 1.0);
glVertex2f((-1.0*scale)+x, (-1.0*scale)+y);
glTexCoord2f(1.0, 1.0);
glVertex2f((1.0*scale)+x, (-1.0*scale)+y);
glTexCoord2f(1.0, 0.0);
glVertex2f((1.0*scale)+x, (1.0*scale)+y);
glEnd();
}
static void redraw( Display *dpy, Window w )
{
printf("Redraw event\n");
glClear( GL_COLOR_BUFFER_BIT );
glTexImage2D(GL_TEXTURE_2D, 0, 3, 4, 4, 0, GL_RGB, GL_UNSIGNED_BYTE, &texture);
glShadeModel(GL_NONE);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glColor3f(1.0, 1.0, 1.0);
glFrontFace(GL_CCW);
glEnable(GL_TEXTURE_2D);
/* draw a row of counterclockwise textured polygons in the upper row*/
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glDisable(GL_CULL_FACE);
draw_counterclockwise_polygon(-0.8, 0.8, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
draw_counterclockwise_polygon(-0.4, 0.8, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_counterclockwise_polygon(0.0, 0.8, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT_AND_BACK);
draw_counterclockwise_polygon(0.4, 0.8, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_clockwise_polygon(0.8, 0.8, 0.18);
/* draw a row of polygons with front filled and back lined */
glPolygonMode(GL_FRONT, GL_FILL);
glPolygonMode(GL_BACK, GL_LINE);
glDisable(GL_CULL_FACE);
draw_counterclockwise_polygon(-0.8, 0.4, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
draw_counterclockwise_polygon(-0.4, 0.4, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_counterclockwise_polygon(0.0, 0.4, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT_AND_BACK);
draw_counterclockwise_polygon(0.4, 0.4, 0.18);
glDisable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_clockwise_polygon(0.8, 0.4, 0.18);
/* front lined, back filled */
glPolygonMode(GL_FRONT, GL_LINE);
glPolygonMode(GL_BACK, GL_FILL);
glDisable(GL_CULL_FACE);
draw_counterclockwise_polygon(-0.8, 0.0, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
draw_counterclockwise_polygon(-0.4, 0.0, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_counterclockwise_polygon(0.0, 0.0, 0.18);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT_AND_BACK);
draw_counterclockwise_polygon(0.4, 0.0, 0.18);
glDisable(GL_CULL_FACE);
glCullFace(GL_FRONT);
draw_clockwise_polygon(0.8, 0.0, 0.18);
/* disable culling und draw a row of clockwise / counterclockwise polys */
glDisable(GL_CULL_FACE);
glPolygonMode(GL_FRONT, GL_FILL);
glPolygonMode(GL_BACK, GL_LINE);
draw_counterclockwise_polygon(-0.8, -0.4, 0.18);
draw_clockwise_polygon(-0.4, -0.4, 0.18);
glPolygonMode(GL_FRONT, GL_LINE);
glPolygonMode(GL_BACK, GL_FILL);
draw_counterclockwise_polygon(0.0, -0.4, 0.18);
draw_clockwise_polygon(0.4, -0.4, 0.18);
glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
draw_counterclockwise_polygon(0.8, -0.4, 0.18);
/* try to draw the same row with culling enabled and set to GL_FRONT_AND_BACK */
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT_AND_BACK);
glPolygonMode(GL_FRONT, GL_FILL);
glPolygonMode(GL_BACK, GL_LINE);
draw_counterclockwise_polygon(-0.8, -0.8, 0.18);
draw_clockwise_polygon(-0.4, -0.8, 0.18);
glPolygonMode(GL_FRONT, GL_LINE);
glPolygonMode(GL_BACK, GL_FILL);
draw_counterclockwise_polygon(0.0, -0.8, 0.18);
draw_clockwise_polygon(0.4, -0.8, 0.18);
glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
draw_counterclockwise_polygon(0.8, -0.8, 0.18);
glXSwapBuffers( dpy, w );
}
static void resize( unsigned int width, unsigned int height )
{
printf("Resize event\n");
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
}
static Window make_rgb_db_window( Display *dpy,
unsigned int width, unsigned int height )
{
int attrib[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
GLXContext ctx;
XVisualInfo *visinfo;
scrnum = DefaultScreen( dpy );
root = RootWindow( dpy, scrnum );
visinfo = glXChooseVisual( dpy, scrnum, attrib );
if (!visinfo) {
printf("Error: couldn't get an RGB, Double-buffered visual\n");
exit(1);
}
/* window attributes */
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow( dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
ctx = glXCreateContext( dpy, visinfo, NULL, True );
glXMakeCurrent( dpy, win, ctx );
return win;
}
static void event_loop( Display *dpy )
{
XEvent event;
while (1) {
XNextEvent( dpy, &event );
switch (event.type) {
case Expose:
redraw( dpy, event.xany.window );
break;
case ConfigureNotify:
resize( event.xconfigure.width, event.xconfigure.height );
break;
}
}
}
int main( int argc, char *argv[] )
{
Display *dpy;
Window win;
dpy = XOpenDisplay(NULL);
win = make_rgb_db_window( dpy, 300, 300 );
glShadeModel( GL_FLAT );
glClearColor( 0.5, 0.2, 0.4, 1.0 );
XMapWindow( dpy, win );
event_loop( dpy );
return 0;
}
