tests: new mapvbo.c test
Test that glDrawArrays() isn't effected by a glMapBuffer()/modify/glUnmapBuffer() immediately afterward.
This commit is contained in:
parent
c28298855b
commit
b6e2dd6e06
|
@ -54,6 +54,7 @@ SOURCES = \
|
|||
jkrahntest.c \
|
||||
lineclip.c \
|
||||
manytex.c \
|
||||
mapvbo.c \
|
||||
minmag.c \
|
||||
mipmap_limits.c \
|
||||
mipmap_view.c \
|
||||
|
|
|
@ -0,0 +1,138 @@
|
|||
/*
|
||||
* Test glMapBuffer() call immediately after glDrawArrays().
|
||||
* See details below.
|
||||
*
|
||||
* NOTE: Do not use freeglut with this test! It calls the Display()
|
||||
* callback twice right away instead of just once.
|
||||
*
|
||||
* Brian Paul
|
||||
* 27 Feb 2009
|
||||
*/
|
||||
|
||||
|
||||
#define GL_GLEXT_PROTOTYPES
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <GL/glut.h>
|
||||
|
||||
static GLuint BufferID;
|
||||
|
||||
|
||||
static GLuint Win;
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Create VBO (position and color) and load with data.
|
||||
*/
|
||||
static void
|
||||
SetupBuffers(void)
|
||||
{
|
||||
static const GLfloat data[] = {
|
||||
/* vertex */ /* color */
|
||||
0, -1, 0, 1, 1, 0,
|
||||
1, 0, 0, 1, 1, 0,
|
||||
0, 1, 0, 1, 1, 0,
|
||||
-1, 0, 0, 1, 1, 0
|
||||
};
|
||||
|
||||
glGenBuffersARB(1, &BufferID);
|
||||
glBindBufferARB(GL_ARRAY_BUFFER_ARB, BufferID);
|
||||
glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(data), data,
|
||||
GL_STATIC_DRAW_ARB);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
Draw(void)
|
||||
{
|
||||
static int count = 1;
|
||||
|
||||
printf("Draw Frame %d\n", count);
|
||||
count++;
|
||||
|
||||
glBindBufferARB(GL_ARRAY_BUFFER_ARB, BufferID);
|
||||
glVertexPointer(3, GL_FLOAT, 24, 0);
|
||||
glEnable(GL_VERTEX_ARRAY);
|
||||
|
||||
glColorPointer(3, GL_FLOAT, 24, (void*) 12);
|
||||
glEnable(GL_COLOR_ARRAY);
|
||||
|
||||
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
|
||||
|
||||
if (0)
|
||||
glFinish();
|
||||
|
||||
/* Immediately map the color buffer and change something.
|
||||
* This should not effect the first glDrawArrays above, but the
|
||||
* next time we draw we should see a black vertex.
|
||||
*/
|
||||
if (1) {
|
||||
GLfloat *m = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB,
|
||||
GL_WRITE_ONLY_ARB);
|
||||
m[3] = m[4] = m[5] = 0.0f; /* black vertex */
|
||||
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void Display( void )
|
||||
{
|
||||
glClear( GL_COLOR_BUFFER_BIT );
|
||||
Draw();
|
||||
glutSwapBuffers();
|
||||
}
|
||||
|
||||
|
||||
static void Reshape( int width, int height )
|
||||
{
|
||||
float ar = (float) width / (float) height;
|
||||
glViewport( 0, 0, width, height );
|
||||
glMatrixMode( GL_PROJECTION );
|
||||
glLoadIdentity();
|
||||
glFrustum( -ar, ar, -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;
|
||||
if (key == 27) {
|
||||
glutDestroyWindow(Win);
|
||||
exit(0);
|
||||
}
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void Init( void )
|
||||
{
|
||||
if (!glutExtensionSupported("GL_ARB_vertex_buffer_object")) {
|
||||
printf("GL_ARB_vertex_buffer_object not found!\n");
|
||||
exit(0);
|
||||
}
|
||||
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
|
||||
|
||||
SetupBuffers();
|
||||
}
|
||||
|
||||
|
||||
int main( int argc, char *argv[] )
|
||||
{
|
||||
glutInit( &argc, argv );
|
||||
glutInitWindowPosition( 0, 0 );
|
||||
glutInitWindowSize( 300, 300 );
|
||||
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
|
||||
Win = glutCreateWindow(argv[0]);
|
||||
glutReshapeFunc( Reshape );
|
||||
glutKeyboardFunc( Key );
|
||||
glutDisplayFunc( Display );
|
||||
Init();
|
||||
glutMainLoop();
|
||||
return 0;
|
||||
}
|
Loading…
Reference in New Issue