From 4524274377f0a9cb088fa9b16105cfb92e3c2d3c Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 14 Oct 2003 15:49:12 +0000 Subject: exercise more vertex buffer object functions --- progs/tests/bufferobj.c | 41 ++++++++++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 7 deletions(-) (limited to 'progs/tests') diff --git a/progs/tests/bufferobj.c b/progs/tests/bufferobj.c index 9653f998d0f..df7d57f8e0a 100644 --- a/progs/tests/bufferobj.c +++ b/progs/tests/bufferobj.c @@ -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); -- cgit v1.2.3