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exercise more vertex buffer object functions

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This commit is contained in:
Brian Paul 2003-10-14 15:49:12 +00:00
parent 0bb281ba21
commit 4524274377
1 changed files with 34 additions and 7 deletions
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41
progs/tests/bufferobj.c
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@ -159,12 +159,30 @@ static void SpecialKey( int key, int x, int y )
static void MakeObject1(struct object *obj)
{
GLfloat *v, *c;
void *p;
int i;
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_WRITE_ONLY_ARB);
/* do some sanity tests */
glGetBufferPointervARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAP_POINTER_ARB, &p);
assert(p == v);
glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_SIZE_ARB, &i);
assert(i == 1000);
glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_ACCESS_ARB, &i);
assert(i == GL_WRITE_ONLY_ARB);
glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_USAGE_ARB, &i);
assert(i == GL_STATIC_DRAW_ARB);
glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &i);
assert(i);
/* Make rectangle */
v[0] = -1; v[1] = -1; v[2] = 0;
v[3] = 1; v[4] = -1; v[5] = 0;
@ -181,6 +199,12 @@ static void MakeObject1(struct object *obj)
obj->NumElements = 0;
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
glGetBufferPointervARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAP_POINTER_ARB, &p);
assert(!p);
glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &i);
assert(!i);
}
@ -212,20 +236,18 @@ static void MakeObject2(struct object *obj)
static void MakeObject3(struct object *obj)
{
GLfloat vertexData[1000];
GLfloat *v, *c;
GLuint *i;
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_WRITE_ONLY_ARB);
int bytes;
/* Make rectangle */
v = vertexData;
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 = vertexData + 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;
@ -234,7 +256,12 @@ static void MakeObject3(struct object *obj)
obj->VertexOffset = 0;
obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts;
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
bytes = obj->NumVerts * (3 + 3) * sizeof(GLfloat);
/* Don't use glMap/UnmapBuffer for this object */
glGenBuffersARB(1, &obj->BufferID);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID);
glBufferDataARB(GL_ARRAY_BUFFER_ARB, bytes, vertexData, GL_STATIC_DRAW_ARB);
/* Setup a buffer of indices to test the ELEMENTS path */
glGenBuffersARB(1, &obj->ElementsBufferID);