dri_bo *
intel_bufferobj_buffer(struct intel_context *intel,
struct intel_buffer_object *intel_obj, GLuint flag)
{
if (intel_obj->region) {
if (flag == INTEL_WRITE_PART)
intel_bufferobj_cow(intel, intel_obj);
else if (flag == INTEL_WRITE_FULL) {
intel_bufferobj_release_region(intel, intel_obj);
intel_bufferobj_alloc_buffer(intel, intel_obj);
}
}
if (intel_obj->buffer == NULL) {
void *sys_buffer = intel_obj->sys_buffer;
/* only one of buffer and sys_buffer could be non-NULL */
intel_bufferobj_alloc_buffer(intel, intel_obj);
intel_obj->sys_buffer = NULL;
intel_bufferobj_subdata(&intel->ctx,
GL_ARRAY_BUFFER_ARB,
0,
intel_obj->Base.Size,
sys_buffer,
&intel_obj->Base);
_mesa_free(sys_buffer);
intel_obj->sys_buffer = NULL;
}
return intel_obj->buffer;
}
drm_intel_bo *
intel_bufferobj_buffer(struct intel_context *intel,
struct intel_buffer_object *intel_obj,
GLuint flag)
{
if (intel_obj->region) {
if (flag == INTEL_WRITE_PART)
intel_bufferobj_cow(intel, intel_obj);
else if (flag == INTEL_WRITE_FULL) {
intel_bufferobj_release_region(intel, intel_obj);
intel_bufferobj_alloc_buffer(intel, intel_obj);
}
}
if (intel_obj->source)
release_buffer(intel_obj);
if (intel_obj->buffer == NULL) {
intel_bufferobj_alloc_buffer(intel, intel_obj);
drm_intel_bo_subdata(intel_obj->buffer,
0, intel_obj->Base.Size,
intel_obj->sys_buffer);
free(intel_obj->sys_buffer);
intel_obj->sys_buffer = NULL;
intel_obj->offset = 0;
}
return intel_obj->buffer;
}
/**
* Deallocate/free a vertex/pixel buffer object.
* Called via glDeleteBuffersARB().
*/
static void
intel_bufferobj_free(GLcontext * ctx, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
/* Buffer objects are automatically unmapped when deleting according
* to the spec, but Mesa doesn't do UnmapBuffer for us at context destroy
* (though it does if you call glDeleteBuffers)
*/
if (obj->Pointer)
intel_bufferobj_unmap(ctx, 0, obj);
_mesa_free(intel_obj->sys_buffer);
if (intel_obj->region) {
intel_bufferobj_release_region(intel, intel_obj);
}
else if (intel_obj->buffer) {
dri_bo_unreference(intel_obj->buffer);
}
_mesa_free(intel_obj);
}
/**
* Allocate space for and store data in a buffer object. Any data that was
* previously stored in the buffer object is lost. If data is NULL,
* memory will be allocated, but no copy will occur.
* Called via ctx->Driver.BufferData().
* \return GL_TRUE for success, GL_FALSE if out of memory
*/
static GLboolean
intel_bufferobj_data(struct gl_context * ctx,
GLenum target,
GLsizeiptrARB size,
const GLvoid * data,
GLenum usage, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
intel_obj->Base.Size = size;
intel_obj->Base.Usage = usage;
assert(!obj->Pointer); /* Mesa should have unmapped it */
if (intel_obj->region)
intel_bufferobj_release_region(intel, intel_obj);
if (intel_obj->buffer != NULL)
release_buffer(intel_obj);
free(intel_obj->sys_buffer);
intel_obj->sys_buffer = NULL;
if (size != 0) {
if (usage == GL_DYNAMIC_DRAW
#ifdef I915
/* On pre-965, stick VBOs in system memory, as we're always doing
* swtnl with their contents anyway.
*/
|| target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER
#endif
)
{
intel_obj->sys_buffer = malloc(size);
if (intel_obj->sys_buffer != NULL) {
if (data != NULL)
memcpy(intel_obj->sys_buffer, data, size);
return GL_TRUE;
}
}
intel_bufferobj_alloc_buffer(intel, intel_obj);
if (!intel_obj->buffer)
return GL_FALSE;
if (data != NULL)
drm_intel_bo_subdata(intel_obj->buffer, 0, size, data);
}
return GL_TRUE;
}
