Squashed 'nx-X11/extras/Mesa_6.4.2/' content from commit 475b1f7

git-subtree-dir: nx-X11/extras/Mesa_6.4.2
git-subtree-split: 475b1f7b56fa36ef4f3b22a749f88a98ddc0d502

1 files changed, 253 insertions, 0 deletions

diff --git a/progs/demos/trispd.c b/progs/demos/trispd.c
new file mode 100644
index 000000000..165d088e3
--- /dev/null
+++ b/progs/demos/trispd.c
@@ -0,0 +1,253 @@
+
+/*
+ * Simple GLUT program to measure triangle strip rendering speed.
+ * Brian Paul  February 15, 1997  This file is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+
+static float MinPeriod = 2.0;   /* 2 seconds */
+static float Width = 400.0;
+static float Height = 400.0;
+static int Loops = 1;
+static int Size = 50;
+static int Texture = 0;
+
+
+
+static void Idle( void )
+{
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   float x, y;
+   float xStep;
+   float yStep;
+   double t0, t1;
+   double triRate;
+   double pixelRate;
+   int triCount;
+   int i;
+   float red[3] = { 1.0, 0.0, 0.0 };
+   float blue[3] = { 0.0, 0.0, 1.0 };
+
+   xStep = yStep = sqrt( 2.0 * Size );
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   triCount = 0;
+   t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   if (Texture) {
+      float uStep = xStep / Width;
+      float vStep = yStep / Height;
+      float u, v;
+      for (i=0; i<Loops; i++) {
+	 for (y=1.0, v=0.0f; y<Height-yStep; y+=yStep, v+=vStep) {
+	    glBegin(GL_TRIANGLE_STRIP);
+	    for (x=1.0, u=0.0f; x<Width; x+=xStep, u+=uStep) {
+	       glColor3fv(red);
+	       glTexCoord2f(u, v);	    
+	       glVertex2f(x, y);
+	       glColor3fv(blue);
+	       glTexCoord2f(u, v+vStep);
+	       glVertex2f(x, y+yStep);
+	       triCount += 2;
+	    }
+	    glEnd();
+	    triCount -= 2;
+	 }
+      }
+   }
+   else {
+      for (i=0; i<Loops; i++) {
+	 for (y=1.0; y<Height-yStep; y+=yStep) {
+	    glBegin(GL_TRIANGLE_STRIP);
+	    for (x=1.0; x<Width; x+=xStep) {
+	       glColor3fv(red);
+	       glVertex2f(x, y);
+	       glColor3fv(blue);
+	       glVertex2f(x, y+yStep);
+	       triCount += 2;
+	    }
+	    glEnd();
+	    triCount -= 2;
+	 }
+      }
+   }
+   glFinish();
+   t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   
+   if (t1-t0 < MinPeriod) {
+      /* Next time draw more triangles to get longer elapsed time */
+      Loops *= 2;
+      return;
+   }
+
+   triRate = triCount / (t1-t0);
+   pixelRate = triRate * Size;
+   printf("Rate: %d tri in %gs = %g tri/s  %d pixels/s\n",
+          triCount, t1-t0, triRate, (int)pixelRate);
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   Width = width;
+   Height = height;
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void LoadTex(int comp, int filter)
+{
+   GLubyte *pixels;
+   int x, y;
+   pixels = (GLubyte *) malloc(4*256*256);
+   for (y = 0; y < 256; ++y)
+      for (x = 0; x < 256; ++x) {
+	 pixels[(y*256+x)*4+0] = (int)(128.5 + 127.0 * cos(0.024544 * x));
+	 pixels[(y*256+x)*4+1] = 255;
+	 pixels[(y*256+x)*4+2] = (int)(128.5 + 127.0 * cos(0.024544 * y));
+	 pixels[(y*256+x)*4+3] = 255;
+      }
+   glEnable(GL_TEXTURE_2D);
+   glTexImage2D(GL_TEXTURE_2D, 0, comp, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   printf("Texture: GL_MODULATE, %d comps, %s\n", comp, filter == GL_NEAREST ? "GL_NEAREST" : "GL_LINEAR");
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLint shade;
+   GLint rBits, gBits, bBits;
+   int filter = GL_NEAREST, comp = 3;
+
+   int i;
+   for (i=1; i<argc; i++) {
+      if (strcmp(argv[i],"-dither")==0)
+         glDisable(GL_DITHER);
+      else if (strcmp(argv[i],"+dither")==0)
+         glEnable(GL_DITHER);
+      else if (strcmp(argv[i],"+smooth")==0)
+         glShadeModel(GL_SMOOTH);
+      else if (strcmp(argv[i],"+flat")==0)
+         glShadeModel(GL_FLAT);
+      else if (strcmp(argv[i],"+depth")==0)
+         glEnable(GL_DEPTH_TEST);
+      else if (strcmp(argv[i],"-depth")==0)
+         glDisable(GL_DEPTH_TEST);
+      else if (strcmp(argv[i],"-size")==0) {
+         Size = atoi(argv[i+1]);
+         i++;
+      }
+      else if (strcmp(argv[i],"-texture")==0)
+	 Texture = 0;
+      else if (strcmp(argv[i],"+texture")==0)
+	 Texture = 1;
+      else if (strcmp(argv[i],"-linear")==0)
+	 filter = GL_NEAREST;
+      else if (strcmp(argv[i],"+linear")==0)
+	 filter = GL_LINEAR;
+      else if (strcmp(argv[i],"-persp")==0)
+	 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+      else if (strcmp(argv[i],"+persp")==0)
+	 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+      else if (strcmp(argv[i],"-comp")==0) {
+	 comp = atoi(argv[i+1]);
+	 i++;
+      }
+      else
+         printf("Unknown option: %s\n", argv[i]);
+   }
+
+   glGetIntegerv(GL_SHADE_MODEL, &shade);
+
+   printf("Dither: %s\n", glIsEnabled(GL_DITHER) ? "on" : "off");
+   printf("ShadeModel: %s\n", (shade==GL_FLAT) ? "flat" : "smooth");
+   printf("DepthTest: %s\n", glIsEnabled(GL_DEPTH_TEST) ? "on" : "off");
+   printf("Size: %d pixels\n", Size);
+
+   if (Texture)
+      LoadTex(comp, filter);
+
+   glGetIntegerv(GL_RED_BITS, &rBits);
+   glGetIntegerv(GL_GREEN_BITS, &gBits);
+   glGetIntegerv(GL_BLUE_BITS, &bBits);
+   printf("RedBits: %d  GreenBits: %d  BlueBits: %d\n", rBits, gBits, bBits);
+}
+
+
+static void Help( const char *program )
+{
+   printf("%s options:\n", program);
+   printf("  +/-dither      enable/disable dithering\n");
+   printf("  +/-depth       enable/disable depth test\n");
+   printf("  +flat          flat shading\n");
+   printf("  +smooth        smooth shading\n");
+   printf("  -size pixels   specify pixels/triangle\n");
+   printf("  +/-texture     enable/disable texture\n");
+   printf("  -comp n        texture format\n");
+   printf("  +/-linear      bilinear texture filter\n");
+   printf("  +/-persp       perspective correction hint\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   printf("For options:  %s -help\n", argv[0]);
+   glutInit( &argc, argv );
+   glutInitWindowSize( (int) Width, (int) Height );
+   glutInitWindowPosition( 0, 0 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   glutCreateWindow( argv[0] );
+
+   if (argc==2 && strcmp(argv[1],"-help")==0) {
+      Help(argv[0]);
+      return 0;
+   }
+
+   Init( argc, argv );
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}