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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2005 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Brecht Van Lommel.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file GPU_buffers.h
* \ingroup gpu
*/
#ifndef _GPU_BUFFERS_H_
#define _GPU_BUFFERS_H_
#include "BKE_DerivedMesh.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _DEBUG
/*#define DEBUG_VBO(X) printf(X)*/
#define DEBUG_VBO(X)
#else
#define DEBUG_VBO(X)
#endif
struct BMesh;
struct GHash;
struct GSet;
typedef struct GPUBuffer {
int size; /* in bytes */
void *pointer; /* used with vertex arrays */
unsigned int id; /* used with vertex buffer objects */
} GPUBuffer;
typedef struct GPUBufferMaterial {
/* range of points used for this material */
int start;
int totpoint;
/* original material index */
short mat_nr;
} GPUBufferMaterial;
/* meshes are split up by material since changing materials requires
* GL state changes that can't occur in the middle of drawing an
* array.
*
* some simplifying assumptions are made:
* - all quads are treated as two triangles.
* - no vertex sharing is used; each triangle gets its own copy of the
* vertices it uses (this makes it easy to deal with a vertex used
* by faces with different properties, such as smooth/solid shading,
* different MCols, etc.)
*
* to avoid confusion between the original MVert vertices and the
* arrays of OpenGL vertices, the latter are referred to here and in
* the source as `points'. similarly, the OpenGL triangles generated
* for MFaces are referred to as triangles rather than faces.
*/
typedef struct GPUDrawObject {
GPUBuffer *points;
GPUBuffer *normals;
GPUBuffer *uv;
GPUBuffer *colors;
GPUBuffer *edges;
GPUBuffer *uvedges;
/* for each triangle, the original MFace index */
int *triangle_to_mface;
/* for each original vertex, the list of related points */
struct GPUVertPointLink *vert_points;
/* see: USE_GPU_POINT_LINK define */
#if 0
/* storage for the vert_points lists */
struct GPUVertPointLink *vert_points_mem;
int vert_points_usage;
#endif
int colType;
GPUBufferMaterial *materials;
int totmaterial;
int tot_triangle_point;
int tot_loose_point;
/* caches of the original DerivedMesh values */
int totvert;
int totedge;
/* if there was a failure allocating some buffer, use old
* rendering code */
bool legacy;
} GPUDrawObject;
/* used for GLSL materials */
typedef struct GPUAttrib {
int index;
int size;
int type;
} GPUAttrib;
void GPU_global_buffer_pool_free(void);
void GPU_global_buffer_pool_free_unused(void);
GPUBuffer *GPU_buffer_alloc(int size);
void GPU_buffer_free(GPUBuffer *buffer);
GPUDrawObject *GPU_drawobject_new(struct DerivedMesh *dm);
void GPU_drawobject_free(struct DerivedMesh *dm);
/* called before drawing */
void GPU_vertex_setup(struct DerivedMesh *dm);
void GPU_normal_setup(struct DerivedMesh *dm);
void GPU_uv_setup(struct DerivedMesh *dm);
/* colType is the cddata MCol type to use! */
void GPU_color_setup(struct DerivedMesh *dm, int colType);
void GPU_edge_setup(struct DerivedMesh *dm); /* does not mix with other data */
void GPU_uvedge_setup(struct DerivedMesh *dm);
int GPU_attrib_element_size(GPUAttrib data[], int numdata);
void GPU_interleaved_attrib_setup(GPUBuffer *buffer, GPUAttrib data[], int numdata);
/* can't lock more than one buffer at once */
void *GPU_buffer_lock(GPUBuffer *buffer);
void *GPU_buffer_lock_stream(GPUBuffer *buffer);
void GPU_buffer_unlock(GPUBuffer *buffer);
/* switch color rendering on=1/off=0 */
void GPU_color_switch(int mode);
/* used for drawing edges */
void GPU_buffer_draw_elements(GPUBuffer *elements, unsigned int mode, int start, int count);
/* called after drawing */
void GPU_buffer_unbind(void);
/* used to check whether to use the old (without buffers) code */
bool GPU_buffer_legacy(struct DerivedMesh *dm);
/* Buffers for non-DerivedMesh drawing */
typedef struct GPU_PBVH_Buffers GPU_PBVH_Buffers;
/* build */
GPU_PBVH_Buffers *GPU_build_mesh_pbvh_buffers(int (*face_vert_indices)[4],
struct MFace *mface, struct MVert *mvert,
int *face_indices, int totface);
GPU_PBVH_Buffers *GPU_build_grid_pbvh_buffers(int *grid_indices, int totgrid,
unsigned int **grid_hidden, int gridsize);
GPU_PBVH_Buffers *GPU_build_bmesh_pbvh_buffers(int smooth_shading);
/* update */
void GPU_update_mesh_pbvh_buffers(GPU_PBVH_Buffers *buffers, MVert *mvert,
int *vert_indices, int totvert, const float *vmask,
int (*face_vert_indices)[4], bool show_diffuse_color);
void GPU_update_bmesh_pbvh_buffers(GPU_PBVH_Buffers *buffers,
struct BMesh *bm,
struct GSet *bm_faces,
struct GSet *bm_unique_verts,
struct GSet *bm_other_verts,
bool show_diffuse_color);
void GPU_update_grid_pbvh_buffers(GPU_PBVH_Buffers *buffers, struct CCGElem **grids,
const struct DMFlagMat *grid_flag_mats,
int *grid_indices, int totgrid, const struct CCGKey *key,
bool show_diffuse_color);
/* draw */
void GPU_draw_pbvh_buffers(GPU_PBVH_Buffers *buffers, DMSetMaterial setMaterial,
bool wireframe);
/* debug PBVH draw*/
void GPU_draw_pbvh_BB(float min[3], float max[3], bool leaf);
void GPU_end_draw_pbvh_BB(void);
void GPU_init_draw_pbvh_BB(void);
bool GPU_pbvh_buffers_diffuse_changed(GPU_PBVH_Buffers *buffers, struct GSet *bm_faces, bool show_diffuse_color);
void GPU_free_pbvh_buffers(GPU_PBVH_Buffers *buffers);
#ifdef __cplusplus
}
#endif
#endif
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