tests: Add test for huge client arrays that has to be split.

When running this test case in valgrind report includes read of unitialized
value in _tnl_draw_prims. The bug doesn't cause any vissible errors.

Bug is caused by vbo_split_copy that is calling draw function with max_index
one past the end instead of the end.

2 files changed, 237 insertions, 0 deletions

diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 67efc3b7a9c..6bb0249e171 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -41,6 +41,7 @@ SOURCES = \
 	copypixrate.c \
 	crossbar.c \
 	cva.c \
+	cva_huge.c \
 	cylwrap.c \
 	drawbuffers.c \
 	drawbuffers2.c \
diff --git a/progs/tests/cva_huge.c b/progs/tests/cva_huge.c
new file mode 100644
index 00000000000..da63596d486
--- /dev/null
+++ b/progs/tests/cva_huge.c
@@ -0,0 +1,236 @@
+/*
+ * Copyright © 2010 Pauli Nieminen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Test case for huge cva arrays. Mesa code has to split this to multiple VBOs
+ * which had memory access error.
+ * This test case doesn't render incorrectly but valgrind showed the memory
+ * access error.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef __VMS
+# include <stddef.h>	/* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
+#else
+# include <malloc.h>	/* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
+#endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_LEGACY
+#include <GL/glut.h>
+
+GLfloat *verts;
+
+GLubyte *color;
+
+GLuint *indices;
+
+#define rows 1000 /* Create 1000x1000 vertex grid */
+#define row_width 5000.0
+#define grid_depth -50.0
+GLuint nr_verts_in_row = rows; 
+GLuint nr_indices_in_strip = rows * 2;
+
+GLboolean double_buffer;
+GLboolean compiled = GL_TRUE;
+
+static void generate_verts( void )
+{
+	unsigned x, y;
+	GLfloat step = row_width /(GLfloat)(nr_verts_in_row - 1); 
+	verts = malloc(sizeof(verts[0]) * 4 * nr_verts_in_row * nr_verts_in_row);
+
+	for (y = 0; y < nr_verts_in_row; ++y) {
+		for (x = 0; x < nr_verts_in_row; ++x) {
+			unsigned idx = 4*(x + y * nr_verts_in_row);
+			verts[idx + 0] = step * x - row_width/2.0;
+			verts[idx + 1] = step * y - row_width/2.0;
+			/* deep enough not to be vissible */
+			verts[idx + 2] = grid_depth;
+			verts[idx + 3] = 0.0;
+		}
+	}
+	glVertexPointer( 3, GL_FLOAT, sizeof(verts[0])*4, verts );
+}
+
+static void generate_colors( void )
+{
+	unsigned x, y;
+	GLfloat step = 255.0/(GLfloat)(nr_verts_in_row - 1);
+	color = malloc(sizeof(color[0]) * 4 * nr_verts_in_row *	nr_verts_in_row);
+
+	for (y = 0; y < nr_verts_in_row; ++y) {
+		for (x = 0; x < nr_verts_in_row; ++x) {
+			unsigned idx = 4*(x + y * nr_verts_in_row);
+			color[idx + 0] = (GLubyte)(step * x);
+			color[idx + 1] = 0x00;
+			color[idx + 2] = (GLubyte)(step * y);
+			color[idx + 3] = 0x00;
+		}
+	}
+	glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color );
+}
+
+static void generate_indices( void )
+{
+	unsigned strip, i;
+
+	/* indice size * number of strips * number of indices in strip */
+	indices = malloc(sizeof(indices[0]) * (nr_verts_in_row - 1) *
+			(nr_indices_in_strip));
+
+	for (strip = 0; strip < nr_verts_in_row - 1; strip += 2) {
+		for (i = 0; i < nr_indices_in_strip; i+=2) {
+			unsigned idx = i + strip * nr_indices_in_strip;
+			unsigned idx2 = (nr_indices_in_strip - i - 2) + (strip +
+					1) * (nr_indices_in_strip);
+			indices[idx + 1] = i/2 + strip*nr_verts_in_row;
+			indices[idx] = i/2 + (strip + 1)*nr_verts_in_row;
+			if (strip + 1 < nr_verts_in_row - 1) {
+				indices[idx2] = i/2 + (strip + 1)*nr_verts_in_row;
+				indices[idx2 + 1] = i/2 + (strip + 2)*nr_verts_in_row;
+			}
+		}
+	}
+}
+
+static void init( void )
+{
+
+
+	generate_verts();
+	generate_colors();
+	generate_indices();
+
+	glClearColor( 0.0, 0.0, 0.0, 0.0 );
+	glShadeModel( GL_SMOOTH );
+
+	glEnableClientState( GL_VERTEX_ARRAY );
+	glEnableClientState( GL_COLOR_ARRAY );
+
+	glMatrixMode( GL_PROJECTION );
+	glLoadIdentity();
+	glFrustum( -100.0, 100.0, -100.0, 100.0, 1.0, 100.0 );
+	glMatrixMode( GL_MODELVIEW );
+	glLoadIdentity();
+
+#ifdef GL_EXT_compiled_vertex_array
+	if ( compiled ) {
+		glLockArraysEXT( 0, rows * rows );
+	}
+#endif
+}
+
+static void display( void )
+{
+	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+	glDrawElements( GL_TRIANGLE_STRIP, nr_indices_in_strip * (nr_verts_in_row - 1) , GL_UNSIGNED_INT, indices );
+
+	if ( double_buffer )
+		glutSwapBuffers();
+	else
+		glFlush();
+}
+
+static void keyboard( unsigned char key, int x, int y )
+{
+	switch ( key ) {
+	case 27:
+		exit( 0 );
+		break;
+	}
+
+	glutPostRedisplay();
+}
+
+static GLboolean args( int argc, char **argv )
+{
+    GLint i;
+
+    double_buffer = GL_TRUE;
+
+    for ( i = 1 ; i < argc ; i++ ) {
+	if ( strcmp( argv[i], "-sb" ) == 0 ) {
+	    double_buffer = GL_FALSE;
+	} else if ( strcmp( argv[i], "-db" ) == 0 ) {
+	    double_buffer = GL_TRUE;
+	} else {
+	    fprintf( stderr, "%s (Bad option).\n", argv[i] );
+	    return GL_FALSE;
+	}
+    }
+    return GL_TRUE;
+}
+
+int main( int argc, char **argv )
+{
+   GLenum type;
+   char *string;
+   double version;
+
+   glutInit( &argc, argv );
+
+   if ( args( argc, argv ) == GL_FALSE ) {
+      exit( 1 );
+   }
+
+   type = GLUT_RGB | GLUT_DEPTH;
+   type |= ( double_buffer ) ? GLUT_DOUBLE : GLUT_SINGLE;
+
+   glutInitDisplayMode( type );
+   glutInitWindowSize( 250, 250 );
+   glutInitWindowPosition( 100, 100 );
+   glutCreateWindow( "CVA Test" );
+
+   /* Make sure the server supports GL 1.2 vertex arrays.
+    */
+   string = (char *) glGetString( GL_VERSION );
+
+   version = atof(string);
+   if ( version < 1.2 ) {
+      fprintf( stderr, "This program requires OpenGL 1.2 vertex arrays.\n" );
+      exit( -1 );
+   }
+
+   /* See if the server supports compiled vertex arrays.
+    */
+   string = (char *) glGetString( GL_EXTENSIONS );
+
+   if ( !strstr( string, "GL_EXT_compiled_vertex_array" ) ) {
+      fprintf( stderr, "Compiled vertex arrays not supported by this renderer.\n" );
+      compiled = GL_FALSE;
+   }
+
+   init();
+
+   glutDisplayFunc( display );
+   glutKeyboardFunc( keyboard );
+   glutMainLoop();
+
+   return 0;
+}