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/*
* gxr
* Copyright 2018 Collabora Ltd.
* Author: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
* Author: Christoph Haag <christoph.haag@collabora.com>
* SPDX-License-Identifier: MIT
*/
#include "scene-pointer.h"
#include <gulkan.h>
#include "graphene-ext.h"
#include "gxr-pointer.h"
typedef struct __attribute__((__packed__)) {
float mvp[16];
} ScenePointerUniformBuffer;
static void
scene_pointer_interface_init (GxrPointerInterface *iface);
struct _ScenePointer
{
SceneObject parent;
GulkanVertexBuffer *vertex_buffer;
GxrPointerData data;
};
G_DEFINE_TYPE_WITH_CODE (ScenePointer, scene_pointer, SCENE_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GXR_TYPE_POINTER,
scene_pointer_interface_init))
static void
scene_pointer_finalize (GObject *gobject);
static void
scene_pointer_class_init (ScenePointerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = scene_pointer_finalize;
}
static void
scene_pointer_init (ScenePointer *self)
{
self->vertex_buffer = gulkan_vertex_buffer_new ();
gxr_pointer_init (GXR_POINTER (self));
}
static gboolean
_initialize (ScenePointer *self,
GulkanClient *gulkan,
VkDescriptorSetLayout *layout)
{
gulkan_vertex_buffer_reset (self->vertex_buffer);
graphene_vec4_t start;
graphene_vec4_init (&start, 0, 0, self->data.start_offset, 1);
graphene_matrix_t identity;
graphene_matrix_init_identity (&identity);
gulkan_geometry_append_ray (self->vertex_buffer,
&start, self->data.length, &identity);
GulkanDevice *device = gulkan_client_get_device (gulkan);
if (!gulkan_vertex_buffer_alloc_empty (self->vertex_buffer, device,
GXR_DEVICE_INDEX_MAX))
return FALSE;
gulkan_vertex_buffer_map_array (self->vertex_buffer);
SceneObject *obj = SCENE_OBJECT (self);
VkDeviceSize ubo_size = sizeof (ScenePointerUniformBuffer);
if (!scene_object_initialize (obj, gulkan, layout, ubo_size))
return FALSE;
scene_object_update_descriptors (obj);
return TRUE;
}
ScenePointer *
scene_pointer_new (GulkanClient *gulkan,
VkDescriptorSetLayout *layout)
{
ScenePointer *self =
(ScenePointer*) g_object_new (SCENE_TYPE_POINTER, 0);
_initialize (self, gulkan, layout);
return self;
}
static void
scene_pointer_finalize (GObject *gobject)
{
ScenePointer *self = SCENE_POINTER (gobject);
g_clear_object (&self->vertex_buffer);
G_OBJECT_CLASS (scene_pointer_parent_class)->finalize (gobject);
}
static void
_update_ubo (ScenePointer *self,
GxrEye eye,
graphene_matrix_t *vp)
{
ScenePointerUniformBuffer ub;
graphene_matrix_t m_matrix;
scene_object_get_transformation (SCENE_OBJECT (self), &m_matrix);
graphene_matrix_t mvp_matrix;
graphene_matrix_multiply (&m_matrix, vp, &mvp_matrix);
float mvp[16];
graphene_matrix_to_float (&mvp_matrix, mvp);
for (int i = 0; i < 16; i++)
ub.mvp[i] = mvp[i];
scene_object_update_ubo (SCENE_OBJECT (self), eye, &ub);
}
void
scene_pointer_render (ScenePointer *self,
GxrEye eye,
VkPipeline pipeline,
VkPipelineLayout pipeline_layout,
VkCommandBuffer cmd_buffer,
graphene_matrix_t *vp)
{
if (!gulkan_vertex_buffer_is_initialized (self->vertex_buffer))
return;
SceneObject *obj = SCENE_OBJECT (self);
if (!scene_object_is_visible (obj))
return;
_update_ubo (self, eye, vp);
vkCmdBindPipeline (cmd_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
scene_object_bind (obj, eye, cmd_buffer, pipeline_layout);
gulkan_vertex_buffer_draw (self->vertex_buffer, cmd_buffer);
}
static void
_move (GxrPointer *pointer,
graphene_matrix_t *transform)
{
ScenePointer *self = SCENE_POINTER (pointer);
SceneObject *obj = SCENE_OBJECT (self);
scene_object_set_transformation_direct (obj, transform);
}
static void
_set_length (GxrPointer *pointer,
float length)
{
ScenePointer *self = SCENE_POINTER (pointer);
gulkan_vertex_buffer_reset (self->vertex_buffer);
graphene_matrix_t identity;
graphene_matrix_init_identity (&identity);
graphene_vec4_t start;
graphene_vec4_init (&start, 0, 0, self->data.start_offset, 1);
gulkan_geometry_append_ray (self->vertex_buffer, &start, length, &identity);
gulkan_vertex_buffer_map_array (self->vertex_buffer);
}
static GxrPointerData*
_get_data (GxrPointer *pointer)
{
ScenePointer *self = SCENE_POINTER (pointer);
return &self->data;
}
static void
_set_transformation (GxrPointer *pointer,
graphene_matrix_t *matrix)
{
ScenePointer *self = SCENE_POINTER (pointer);
scene_object_set_transformation (SCENE_OBJECT (self), matrix);
}
static void
_get_transformation (GxrPointer *pointer,
graphene_matrix_t *matrix)
{
ScenePointer *self = SCENE_POINTER (pointer);
graphene_matrix_t transformation;
scene_object_get_transformation (SCENE_OBJECT (self), &transformation);
graphene_matrix_init_from_matrix (matrix, &transformation);
}
static void
_show (GxrPointer *pointer)
{
ScenePointer *self = SCENE_POINTER (pointer);
scene_object_show (SCENE_OBJECT (self));
}
static void
_hide (GxrPointer *pointer)
{
ScenePointer *self = SCENE_POINTER (pointer);
scene_object_hide (SCENE_OBJECT (self));
}
static void
scene_pointer_interface_init (GxrPointerInterface *iface)
{
iface->move = _move;
iface->set_length = _set_length;
iface->get_data = _get_data;
iface->set_transformation = _set_transformation;
iface->get_transformation = _get_transformation;
iface->show = _show;
iface->hide = _hide;
}
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