From d13c603e37bf7fb4c84b215775eb547761c1e2ec Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michel=20D=C3=A4nzer?= <daenzer@vmware.com>
Date: Sat, 5 Dec 2009 17:20:03 +0100
Subject: [PATCH] Add 'texture leak' test.

---
 progs/tests/Makefile  |   1 +
 progs/tests/texleak.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100644 progs/tests/texleak.c

diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 197e14d..3e25411 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -98,6 +98,7 @@ SOURCES = \
 	texdown \
 	texfilt.c \
 	texgenmix.c \
+	texleak.c \
 	texline.c \
 	texobj.c \
 	texobjshare.c \
diff --git a/progs/tests/texleak.c b/progs/tests/texleak.c
new file mode 100644
index 0000000..5cf4ff3
--- /dev/null
+++ b/progs/tests/texleak.c
@@ -0,0 +1,140 @@
+/*
+ * 'Texture leak' test
+ *
+ * Allocates and uses an additional texture of the maximum supported size for
+ * each frame. This tests the system's ability to cope with using increasing
+ * amounts of texture memory.
+ *
+ * Michel Dänzer  July 2009  This program is in the public domain.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+
+GLint size;
+GLvoid *image;
+static GLuint numTexObj;
+static GLuint *texObj;
+
+
+static void Idle( void )
+{
+   glutPostRedisplay();
+}
+
+
+static void DrawObject(void)
+{
+   static const GLfloat tex_coords[] = {  0.0,  0.0,  1.0,  1.0,  0.0 };
+   static const GLfloat vtx_coords[] = { -1.0, -1.0,  1.0,  1.0, -1.0 };
+   GLint i, j;
+
+   glEnable(GL_TEXTURE_2D);
+
+   for (i = 0; i < numTexObj; i++) {
+      glBindTexture(GL_TEXTURE_2D, texObj[i]);
+      glBegin(GL_QUADS);
+      for (j = 0; j < 4; j++ ) {
+         glTexCoord2f(tex_coords[j], tex_coords[j+1]);
+         glVertex2f( vtx_coords[j], vtx_coords[j+1] );
+      }
+      glEnd();
+   }
+}
+
+
+static void Display( void )
+{
+   struct timeval start, end;
+
+   texObj = realloc(texObj, ++numTexObj * sizeof(*texObj));
+
+   /* allocate a texture object */
+   glGenTextures(1, texObj + (numTexObj - 1));
+
+   glBindTexture(GL_TEXTURE_2D, texObj[numTexObj - 1]);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   memset(image, (16 * numTexObj) & 0xff, 4 * size * size);
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size, size, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+
+   gettimeofday(&start, NULL);
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+      glScalef(5.0, 5.0, 5.0);
+      DrawObject();
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   glFinish();
+   gettimeofday(&end, NULL);
+   printf("Rendering frame took %lu ms using %u MB of textures\n",
+	  end.tv_sec * 1000 + end.tv_usec / 1000 - start.tv_sec * 1000 -
+	  start.tv_usec / 1000, numTexObj * 4 * size / 1024 * size / 1024);
+
+   sleep(1);
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -6.0, 6.0, -6.0, 6.0, 10.0, 100.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
+   printf("%d x %d max texture size\n", size, size);
+
+   image = malloc(4 * size * size);
+   if (!image) {
+      fprintf(stderr, "Failed to allocate %u bytes of memory\n", 4 * size * size);
+      exit(1);
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.3, 0.3, 0.4, 1.0);
+
+   Idle();
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowSize( 300, 300 );
+   glutInitWindowPosition( 0, 0 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0] );
+   glewInit();
+
+   Init( argc, argv );
+
+   glutReshapeFunc( Reshape );
+   glutDisplayFunc( Display );
+   glutIdleFunc(Idle);
+
+   glutMainLoop();
+   return 0;
+}
-- 
2.7.4