GLVertexBuffer::GLVertexBuffer(GraphicBuffer::Access access,
GraphicBuffer::Usage usage,
uint32 desired_count,
const void* initData,
const vertex_elements_type& format):
GraphicBuffer(access, usage),
mFormat(format),
mMaped(false) {
glGenBuffers(1, &mId);
glBindBuffer(GL_ARRAY_BUFFER, mId);
if(initData) {
CHECK_GL_CALL(glBufferData(GL_ARRAY_BUFFER,
static_cast<GLsizeiptr>(desired_count * GetVertexElementsTotalSize(format)),
static_cast<const GLvoid*>(initData),
_usage_to_gl(usage)));
} else {
CHECK_GL_CALL(glBufferData(GL_ARRAY_BUFFER,
static_cast<GLsizeiptr>(desired_count * GetVertexElementsTotalSize(format)),
0,
_usage_to_gl(usage)));
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
mCount = desired_count;
}
void GLVertexBuffer::resize(uint32 desired_count) {
glBindBuffer(GL_ARRAY_BUFFER, mId);
CHECK_GL_CALL(glBufferData(GL_ARRAY_BUFFER,
static_cast<GLsizeiptr>(desired_count * GetVertexElementsTotalSize(mFormat)),
0,
usage() == Dynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW));
mCount = desired_count;
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
VertexMapper::VertexMapper(const GraphicBufferPtr& _buffer, const vertex_elements_type& _elements):
buffer(_buffer),
elements(_elements) {
if(buffer)
data = buffer->map();
else
log_error(L"VertexMapper: invalid graphic buffer ptr");
if(!data)
log_error(L"VertexMapper:: failed to map vertex data");
element_size = GetVertexElementsTotalSize(elements);
}
void GLVertexBuffer::copyBuffer(const GraphicBufferPtr& to) {
if(to) {
GLVertexBuffer* dest = checked_cast<GLVertexBuffer*>(to.get());
if(glCopyBufferSubData) {
glBindBuffer(GL_COPY_READ_BUFFER, this->getGLBuffer());
glBindBuffer(GL_COPY_WRITE_BUFFER, dest->getGLBuffer());
CHECK_GL_CALL(glCopyBufferSubData(GL_COPY_READ_BUFFER,
GL_COPY_WRITE_BUFFER,
0,
0,
this->count() * GetVertexElementsTotalSize(this->format())));
glBindBuffer(GL_COPY_READ_BUFFER, 0);
glBindBuffer(GL_COPY_WRITE_BUFFER, 0);
} else {
log_error(L"GLVertexBuffer::copyBuffer: GL Copy Buffer Sub Data not supported");
}
}
}
