diff options
| -rw-r--r-- | progs/tests/Makefile.X11 | 1 | ||||
| -rw-r--r-- | progs/tests/bufferobj.c | 259 |
2 files changed, 260 insertions, 0 deletions
diff --git a/progs/tests/Makefile.X11 b/progs/tests/Makefile.X11 index 23b9309776..f568c342c9 100644 --- a/progs/tests/Makefile.X11 +++ b/progs/tests/Makefile.X11 @@ -8,6 +8,7 @@ TOP = ../.. LIBS = $(APP_LIB_DEPS) SOURCES = antialias.c \ + bufferobj.c \ cva.c \ dinoshade.c \ fogcoord.c \ diff --git a/progs/tests/bufferobj.c b/progs/tests/bufferobj.c new file mode 100644 index 0000000000..4da8058ae7 --- /dev/null +++ b/progs/tests/bufferobj.c @@ -0,0 +1,259 @@ +/* + * Test GL_ARB_vertex_buffer_object + * + * Brian Paul + * 16 Sep 2003 + */ + + +#define GL_GLEXT_PROTOTYPES +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#include <GL/glut.h> + +#define NUM_OBJECTS 10 + +struct object +{ + GLuint BufferID; + GLuint NumVerts; + GLuint VertexOffset; + GLuint ColorOffset; +}; + +static struct object Objects[NUM_OBJECTS]; +static GLuint NumObjects; + +static GLfloat Xrot = 0, Yrot = 0, Zrot = 0; +static GLboolean Anim = GL_TRUE; + + +static void CheckError(int line) +{ + GLenum err = glGetError(); + if (err) { + printf("GL Error %d at line %d\n", (int) err, line); + } +} + + +static void DrawObject( const struct object *obj ) +{ + glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID); + glVertexPointer(3, GL_FLOAT, 0, (void *) obj->VertexOffset); + glEnable(GL_VERTEX_ARRAY); + glColorPointer(3, GL_FLOAT, 0, (void *) obj->ColorOffset); + glEnable(GL_COLOR_ARRAY); + glDrawArrays(GL_LINE_LOOP, 0, obj->NumVerts); +} + + +static void Idle( void ) +{ + Zrot = 0.05 * glutGet(GLUT_ELAPSED_TIME); + glutPostRedisplay(); +} + + +static void Display( void ) +{ + int i; + + glClear( GL_COLOR_BUFFER_BIT ); + + for (i = 0; i < NumObjects; i++) { + float x = 5.0 * ((float) i / (NumObjects-1) - 0.5); + glPushMatrix(); + glTranslatef(x, 0, 0); + glRotatef(Xrot, 1, 0, 0); + glRotatef(Yrot, 0, 1, 0); + glRotatef(Zrot, 0, 0, 1); + + DrawObject(Objects + i); + + glPopMatrix(); + } + + CheckError(__LINE__); + 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 ) +{ + const GLfloat step = 3.0; + (void) x; + (void) y; + switch (key) { + case 'a': + Anim = !Anim; + if (Anim) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + break; + case 'z': + Zrot -= step; + break; + case 'Z': + Zrot += step; + break; + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void SpecialKey( int key, int x, int y ) +{ + const GLfloat step = 3.0; + (void) x; + (void) y; + switch (key) { + case GLUT_KEY_UP: + Xrot -= step; + break; + case GLUT_KEY_DOWN: + Xrot += step; + break; + case GLUT_KEY_LEFT: + Yrot -= step; + break; + case GLUT_KEY_RIGHT: + Yrot += step; + break; + } + glutPostRedisplay(); +} + + + +static void MakeObject1(struct object *obj) +{ + GLfloat *v, *c; + + glGenBuffersARB(1, &obj->BufferID); + glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID); + glBufferDataARB(GL_ARRAY_BUFFER_ARB, 1000, NULL, GL_STATIC_DRAW_ARB); + v = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_READ_WRITE_ARB); + + /* Make rectangle */ + v[0] = -1; v[1] = -1; v[2] = 0; + v[3] = 1; v[4] = -1; v[5] = 0; + v[6] = 1; v[7] = 1; v[8] = 0; + v[9] = -1; v[10] = 1; v[11] = 0; + c = v + 12; + c[0] = 1; c[1] = 0; c[2] = 0; + c[3] = 1; c[4] = 0; c[5] = 0; + c[6] = 1; c[7] = 0; c[8] = 1; + c[9] = 1; c[10] = 0; c[11] = 1; + obj->NumVerts = 4; + obj->VertexOffset = 0; + obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + + glUnmapBufferARB(GL_ARRAY_BUFFER_ARB); +} + + +static void MakeObject2(struct object *obj) +{ + GLfloat *v, *c; + + glGenBuffersARB(1, &obj->BufferID); + glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID); + glBufferDataARB(GL_ARRAY_BUFFER_ARB, 1000, NULL, GL_STATIC_DRAW_ARB); + v = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_READ_WRITE_ARB); + + /* Make triangle */ + v[0] = -1; v[1] = -1; v[2] = 0; + v[3] = 1; v[4] = -1; v[5] = 0; + v[6] = 0; v[7] = 1; v[8] = 0; + c = v + 9; + c[0] = 0; c[1] = 1; c[2] = 0; + c[3] = 0; c[4] = 1; c[5] = 0; + c[6] = 1; c[7] = 1; c[8] = 0; + obj->NumVerts = 3; + obj->VertexOffset = 0; + obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + + glUnmapBufferARB(GL_ARRAY_BUFFER_ARB); +} + + +static void MakeObject3(struct object *obj) +{ + GLfloat *v, *c; + + glGenBuffersARB(1, &obj->BufferID); + glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID); + glBufferDataARB(GL_ARRAY_BUFFER_ARB, 1000, NULL, GL_STATIC_DRAW_ARB); + v = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_READ_WRITE_ARB); + + /* Make rectangle */ + v[0] = -1; v[1] = -0.5; v[2] = 0; + v[3] = 1; v[4] = -0.5; v[5] = 0; + v[6] = 1; v[7] = 0.5; v[8] = 0; + v[9] = -1; v[10] = 0.5; v[11] = 0; + c = v + 12; + c[0] = 0; c[1] = 0; c[2] = 1; + c[3] = 0; c[4] = 0; c[5] = 1; + c[6] = 0; c[7] = 1; c[8] = 1; + c[9] = 0; c[10] = 1; c[11] = 1; + obj->NumVerts = 4; + obj->VertexOffset = 0; + obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + + glUnmapBufferARB(GL_ARRAY_BUFFER_ARB); +} + + + +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)); + + MakeObject1(Objects + 0); + MakeObject2(Objects + 1); + MakeObject3(Objects + 2); + NumObjects = 3; +} + + +int main( int argc, char *argv[] ) +{ + glutInit( &argc, argv ); + glutInitWindowPosition( 0, 0 ); + glutInitWindowSize( 600, 300 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); + glutCreateWindow(argv[0]); + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + if (Anim) + glutIdleFunc(Idle); + Init(); + glutMainLoop(); + return 0; +} |