void Vao_SetVertexPointers(vao_t *vao)
{
int attribIndex;
// set vertex pointers
for (attribIndex = 0; attribIndex < ATTR_INDEX_COUNT; attribIndex++)
{
uint32_t attribBit = 1 << attribIndex;
vaoAttrib_t *vAtb = &vao->attribs[attribIndex];
if (vAtb->enabled)
{
qglVertexAttribPointer(attribIndex, vAtb->count, vAtb->type, vAtb->normalized, vAtb->stride, BUFFER_OFFSET(vAtb->offset));
if (glRefConfig.vertexArrayObject || !(glState.vertexAttribsEnabled & attribBit))
qglEnableVertexAttribArray(attribIndex);
if (!glRefConfig.vertexArrayObject || vao == tess.vao)
glState.vertexAttribsEnabled |= attribBit;
}
else
{
// don't disable vertex attribs when using vertex array objects
// Vao_SetVertexPointers is only called during init when using VAOs, and vertex attribs start disabled anyway
if (!glRefConfig.vertexArrayObject && (glState.vertexAttribsEnabled & attribBit))
qglDisableVertexAttribArray(attribIndex);
if (!glRefConfig.vertexArrayObject || vao == tess.vao)
glState.vertexAttribsEnabled &= ~attribBit;
}
}
}
void R_EnableAttribute (const char* name)
{
r_progvar_t* v;
if (!(v = R_ProgramVariable(GL_ATTRIBUTE, name)))
return;
qglEnableVertexAttribArray(v->location);
}
/*
* @brief
*/
void R_EnableAttribute(r_attribute_t *attribute) {
if (!attribute || attribute->location == -1) {
Com_Warn("NULL or invalid attribute\n");
return;
}
if (attribute->value.i != 1) {
qglEnableVertexAttribArray(attribute->location);
attribute->value.i = 1;
}
R_GetError(attribute->name);
}
/*
==============
RB_UpdateTessVao
Adapted from Tess_UpdateVBOs from xreal
Update the default VAO to replace the client side vertex arrays
==============
*/
void RB_UpdateTessVao(unsigned int attribBits)
{
GLimp_LogComment("--- RB_UpdateTessVao ---\n");
backEnd.pc.c_dynamicVaoDraws++;
// update the default VAO
if(tess.numVertexes > 0 && tess.numVertexes <= SHADER_MAX_VERTEXES && tess.numIndexes > 0 && tess.numIndexes <= SHADER_MAX_INDEXES)
{
int attribIndex;
int attribUpload;
R_BindVao(tess.vao);
// orphan old vertex buffer so we don't stall on it
qglBufferData(GL_ARRAY_BUFFER, tess.vao->vertexesSize, NULL, GL_DYNAMIC_DRAW);
// if nothing to set, set everything
if(!(attribBits & ATTR_BITS))
attribBits = ATTR_BITS;
attribUpload = attribBits;
if((attribUpload & ATTR_TEXCOORD) || (attribUpload & ATTR_LIGHTCOORD))
{
// these are interleaved, so we update both if either need it
// this translates to updating ATTR_TEXCOORD twice as large as it needs
attribUpload &= ~ATTR_LIGHTCOORD;
attribUpload |= ATTR_TEXCOORD;
}
for (attribIndex = 0; attribIndex < ATTR_INDEX_COUNT; attribIndex++)
{
uint32_t attribBit = 1 << attribIndex;
vaoAttrib_t *vAtb = &tess.vao->attribs[attribIndex];
if (attribUpload & attribBit)
{
// note: tess has a VBO where stride == size
qglBufferSubData(GL_ARRAY_BUFFER, vAtb->offset, tess.numVertexes * vAtb->stride, tess.attribPointers[attribIndex]);
}
if (attribBits & attribBit)
{
if (!glRefConfig.vertexArrayObject)
qglVertexAttribPointer(attribIndex, vAtb->count, vAtb->type, vAtb->normalized, vAtb->stride, BUFFER_OFFSET(vAtb->offset));
if (!(glState.vertexAttribsEnabled & attribBit))
{
qglEnableVertexAttribArray(attribIndex);
glState.vertexAttribsEnabled |= attribBit;
}
}
else
{
if ((glState.vertexAttribsEnabled & attribBit))
{
qglDisableVertexAttribArray(attribIndex);
glState.vertexAttribsEnabled &= ~attribBit;
}
}
}
// orphan old index buffer so we don't stall on it
qglBufferData(GL_ELEMENT_ARRAY_BUFFER, tess.vao->indexesSize, NULL, GL_DYNAMIC_DRAW);
qglBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, tess.numIndexes * sizeof(tess.indexes[0]), tess.indexes);
}
}
