Random state-change / primitive rendering. Good for hammering on a driver...

1 files changed, 457 insertions, 0 deletions

diff --git a/progs/tests/random.c b/progs/tests/random.c
new file mode 100644
index 0000000000..d52c338e0e
--- /dev/null
+++ b/progs/tests/random.c
@@ -0,0 +1,457 @@
+/**
+ * Random rendering, to check for crashes, hangs, etc.
+ *
+ * Brian Paul
+ * 21 June 2007
+ */
+
+#define GL_GLEXT_PROTOTYPES
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+
+static int Win;
+static GLboolean Anim = GL_TRUE;
+static int Width = 200, Height = 200;
+static int DB = 0;
+static int MinVertexCount = 0, MaxVertexCount = 1000;
+static int Count = 0;
+
+struct vertex
+{
+   int type;
+   float v[4];
+};
+
+static int BufferSize = 10000;
+static struct vertex *Vbuffer = NULL;
+static int Vcount, Vprim;
+
+enum {
+   BEGIN,
+   END,
+   VERTEX2,
+   VERTEX3,
+   VERTEX4,
+   COLOR3,
+   COLOR4,
+   TEX2,
+   TEX3,
+   TEX4,
+   SECCOLOR3,
+   NORMAL3
+};
+
+
+
+/**
+ * This can be called from within gdb after a crash:
+ * (gdb) call ReportState()
+ */
+static void
+ReportState(void)
+{
+   static const struct {
+      GLenum token;
+      char *str;
+      GLenum type;
+   } state [] = {
+      { GL_ALPHA_TEST, "GL_ALPHA_TEST", GL_INT },
+      { GL_BLEND, "GL_BLEND", GL_INT },
+      { GL_CLIP_PLANE0, "GL_CLIP_PLANE0", GL_INT },
+      { GL_DEPTH_TEST, "GL_DEPTH_TEST", GL_INT },
+      { GL_LIGHTING, "GL_LIGHTING", GL_INT },
+      { GL_LINE_WIDTH, "GL_LINE_WIDTH", GL_FLOAT },
+      { GL_POINT_SIZE, "GL_POINT_SIZE", GL_FLOAT },
+      { GL_SHADE_MODEL, "GL_SHADE_MODEL", GL_INT },
+      { GL_SCISSOR_TEST, "GL_SCISSOR_TEST", GL_INT },
+      { 0, NULL, 0 }
+   };
+
+   GLint i;
+
+   for (i = 0; state[i].token; i++) {
+      if (state[i].type == GL_INT) {
+         GLint v;
+         glGetIntegerv(state[i].token, &v);
+         printf("%s = %d\n", state[i].str, v);
+      }
+      else {
+         GLfloat v;
+         glGetFloatv(state[i].token, &v);
+         printf("%s = %f\n", state[i].str, v);
+      }
+   }
+}
+
+static void
+PrintVertex(const char *f, const struct vertex *v, int sz)
+{
+   int i;
+   printf("%s(", f);
+   for (i = 0; i < sz; i++) {
+      printf("%g%s", v->v[i], (i == sz-1) ? "" : ", ");
+   }
+   printf(");\n");
+}
+
+/**
+ * This can be called from within gdb after a crash:
+ * (gdb) call ReportState()
+ */
+static void
+LastPrim(void)
+{
+   int i;
+   for (i = 0; i < Vcount; i++) {
+      switch (Vbuffer[i].type) {
+      case BEGIN:
+         printf("glBegin(%d);\n", (int) Vbuffer[i].v[0]);
+         break;
+      case END:
+         printf("glEnd();\n");
+         break;
+      case VERTEX2:
+         PrintVertex("glVertex2f", Vbuffer + i, 2);
+         break;
+      case VERTEX3:
+         PrintVertex("glVertex3f", Vbuffer + i, 3);
+         break;
+      case VERTEX4:
+         PrintVertex("glVertex4f", Vbuffer + i, 4);
+         break;
+      case COLOR3:
+         PrintVertex("glColor3f", Vbuffer + i, 3);
+         break;
+      case COLOR4:
+         PrintVertex("glColor4f", Vbuffer + i, 4);
+         break;
+      case TEX2:
+         PrintVertex("glTexCoord2f", Vbuffer + i, 2);
+         break;
+      case TEX3:
+         PrintVertex("glTexCoord3f", Vbuffer + i, 3);
+         break;
+      case TEX4:
+         PrintVertex("glTexCoord4f", Vbuffer + i, 4);
+         break;
+      case SECCOLOR3:
+         PrintVertex("glSecondaryColor3f", Vbuffer + i, 3);
+         break;
+      case NORMAL3:
+         PrintVertex("glNormal3f", Vbuffer + i, 3);
+         break;
+      default:
+         abort();
+      }
+   }
+}
+
+
+static int
+RandomInt(int max)
+{
+   if (max == 0)
+      return 0;
+   return rand() % max;
+}
+
+static float
+RandomFloat(float min, float max)
+{
+   int k = rand() % 10000;
+   float x = min + (max - min) * k / 10000.0;
+   return x;
+}
+
+/*
+ * Return true if random number in [0,1] is <= percentile.
+ */
+static GLboolean
+RandomChoice(float percentile)
+{
+   return RandomFloat(0.0, 1.0) <= percentile;
+}
+
+static void
+RandomStateChange(void)
+{
+   int k = RandomInt(19);
+   switch (k) {
+   case 0:
+      glEnable(GL_BLEND);
+      break;
+   case 1:
+      glDisable(GL_BLEND);
+      break;
+   case 2:
+      glEnable(GL_ALPHA_TEST);
+      break;
+   case 3:
+      glEnable(GL_ALPHA_TEST);
+      break;
+   case 4:
+      glEnable(GL_DEPTH_TEST);
+      break;
+   case 5:
+      glEnable(GL_DEPTH_TEST);
+      break;
+   case 6:
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+      break;
+   case 7:
+      glPointSize(10.0);
+      break;
+   case 8:
+      glPointSize(1.0);
+      break;
+   case 9:
+      glLineWidth(10.0);
+      break;
+   case 10:
+      glLineWidth(1.0);
+      break;
+   case 11:
+      glEnable(GL_LIGHTING);
+      break;
+   case 12:
+      glDisable(GL_LIGHTING);
+      break;
+   case 13:
+      glEnable(GL_SCISSOR_TEST);
+      break;
+   case 14:
+      glDisable(GL_SCISSOR_TEST);
+      break;
+   case 15:
+      glEnable(GL_CLIP_PLANE0);
+      break;
+   case 16:
+      glDisable(GL_CLIP_PLANE0);
+      break;
+   case 17:
+      glShadeModel(GL_FLAT);
+      break;
+   case 18:
+      glShadeModel(GL_SMOOTH);
+      break;
+   }
+}
+
+
+static void
+RandomPrimitive(void)
+{
+   int i;
+   int len = MinVertexCount + RandomInt(MaxVertexCount - MinVertexCount);
+
+   Vprim = RandomInt(10);
+
+   glBegin(Vprim);
+   Vbuffer[Vcount].type = BEGIN;
+   Vbuffer[Vcount].v[0] = Vprim;
+   Vcount++;
+
+   for (i = 0; i < len; i++) {
+      Vbuffer[Vcount].v[0] = RandomFloat(-3, 3);
+      Vbuffer[Vcount].v[1] = RandomFloat(-3, 3);
+      Vbuffer[Vcount].v[2] = RandomFloat(-3, 3);
+      Vbuffer[Vcount].v[3] = RandomFloat(-3, 3);
+      int k = RandomInt(9);
+      switch (k) {
+      case 0:
+         glVertex2fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = VERTEX2;
+         break;
+      case 1:
+         glVertex3fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = VERTEX3;
+         break;
+      case 2:
+         glVertex4fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = VERTEX4;
+         break;
+      case 3:
+         glColor3fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = COLOR3;
+         break;
+      case 4:
+         glColor4fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = COLOR4;
+         break;
+      case 5:
+         glTexCoord2fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = TEX2;
+         break;
+      case 6:
+         glTexCoord3fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = TEX3;
+         break;
+      case 7:
+         glTexCoord4fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = TEX4;
+         break;
+      case 8:
+         glSecondaryColor3fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = SECCOLOR3;
+         break;
+      case 9:
+         glNormal3fv(Vbuffer[Vcount].v);
+         Vbuffer[Vcount].type = NORMAL3;
+         break;
+      default:
+         abort();
+      }
+      Vcount++;
+
+      if (Vcount >= BufferSize - 2) {
+         /* reset */
+         Vcount = 0;
+      }
+   }
+
+   Vbuffer[Vcount++].type = END;
+
+   glEnd();
+}
+
+
+static void
+RandomDraw(void)
+{
+   int i;
+   GLboolean dlist = RandomChoice(0.1);
+   if (dlist)
+      glNewList(1, GL_COMPILE);
+   for (i = 0; i < 3; i++) {
+      RandomStateChange();
+   }
+   RandomPrimitive();
+
+   if (dlist) {
+      glEndList();
+      glCallList(1);
+   }
+}
+
+
+static void
+Idle(void)
+{
+   glutPostRedisplay();
+}
+
+
+static void
+Draw(void)
+{
+#if 1
+   RandomDraw();
+   Count++;
+#else
+   /* cut & paste temp code here */
+#endif
+
+   assert(glGetError() == 0);
+
+   if (DB)
+      glutSwapBuffers();
+   else
+      glFinish();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   Width = width;
+   Height = height;
+   glViewport(0, 0, width, height);
+   glScissor(20, 20, Width-40, Height-40);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -15.0);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         glutDestroyWindow(Win);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   static const GLdouble plane[4] = {1, 1, 0, 0};
+   glDrawBuffer(GL_FRONT);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   glEnable(GL_LIGHT0);
+   glClipPlane(GL_CLIP_PLANE0, plane);
+
+   Vbuffer = (struct vertex *)
+      malloc(BufferSize * sizeof(struct vertex));
+
+   /* silence warnings */
+   (void) ReportState;
+   (void) LastPrim;
+}
+
+
+static void
+ParseArgs(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-s") == 0) {
+         int j = atoi(argv[i + 1]);
+         printf("Random seed value: %d\n", j);
+         srand(j);
+         i++;
+      }
+      else if (strcmp(argv[i], "-a") == 0) {
+         i++;
+         MinVertexCount = atoi(argv[i]);
+      }
+      else if (strcmp(argv[i], "-b") == 0) {
+         i++;
+         MaxVertexCount = atoi(argv[i]);
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(Width, Height);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   Win = glutCreateWindow(argv[0]);
+   ParseArgs(argc, argv);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}