diff options
| -rw-r--r-- | progs/tests/bufferobj.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/progs/tests/bufferobj.c b/progs/tests/bufferobj.c index 50ab5cdfa8..d1a85392e1 100644 --- a/progs/tests/bufferobj.c +++ b/progs/tests/bufferobj.c @@ -22,6 +22,8 @@ struct object GLuint NumVerts; GLuint VertexOffset; GLuint ColorOffset; + GLuint VertexStride; + GLuint ColorStride; GLuint NumElements; }; @@ -46,7 +48,7 @@ static void CheckError(int line) static void DrawObject( const struct object *obj ) { glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->BufferID); - glVertexPointer(3, GL_FLOAT, 0, (void *) obj->VertexOffset); + glVertexPointer(3, GL_FLOAT, obj->VertexStride, (void *) obj->VertexOffset); glEnable(GL_VERTEX_ARRAY); /* test push/pop attrib */ @@ -60,7 +62,7 @@ static void DrawObject( const struct object *obj ) glPopClientAttrib(); } #endif - glColorPointer(3, GL_FLOAT, 0, (void *) obj->ColorOffset); + glColorPointer(3, GL_FLOAT, obj->ColorStride, (void *) obj->ColorOffset); glEnable(GL_COLOR_ARRAY); if (obj->NumElements > 0) { @@ -241,6 +243,8 @@ static void MakeObject1(struct object *obj) obj->NumVerts = 4; obj->VertexOffset = 0; obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + obj->VertexStride = 0; + obj->ColorStride = 0; obj->NumElements = 0; glUnmapBufferARB(GL_ARRAY_BUFFER_ARB); @@ -255,24 +259,28 @@ static void MakeObject1(struct object *obj) static void MakeObject2(struct object *obj) { - GLfloat *v, *c; + GLfloat *v; + int start = 40; /* bytes, to test non-zero array offsets */ 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); - /* 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; + v += start / sizeof(GLfloat); + + /* Make triangle: interleaved colors, then positions */ + /* R G B X Y Z */ + v[0] = 0; v[1] = 1; v[2] = 0; v[3] = -1; v[4] = -1; v[5] = 0; + v[6] = 0; v[7] = 1; v[8] = 0; v[9] = 1; v[10] = -1; v[11] = 0; + v[12] = 1; v[13] = 1; v[14] = 0; v[15] = 0; v[16] = 1; v[17] = 0; + obj->NumVerts = 3; - obj->VertexOffset = 0; - obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + obj->VertexOffset = start + 3 * sizeof(GLfloat); + obj->ColorOffset = start; + obj->VertexStride = 6 * sizeof(GLfloat); + obj->ColorStride = 6 * sizeof(GLfloat); + obj->NumElements = 0; glUnmapBufferARB(GL_ARRAY_BUFFER_ARB); @@ -300,6 +308,8 @@ static void MakeObject3(struct object *obj) obj->NumVerts = 4; obj->VertexOffset = 0; obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts; + obj->VertexStride = 0; + obj->ColorStride = 0; bytes = obj->NumVerts * (3 + 3) * sizeof(GLfloat); |