vbo.h - Android社区 - https://www.androidos.net.cn/

/*
 * mesa 3-D graphics library
 *
 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \file vbo_context.h
 * \brief VBO builder module datatypes and definitions.
 * \author Keith Whitwell
 */


#ifndef _VBO_H
#define _VBO_H

#include <stdbool.h>
#include "main/glheader.h"

#ifdef __cplusplus
extern "C" {
#endif

struct gl_vertex_array;
struct gl_context;
struct gl_transform_feedback_object;

struct _mesa_prim {
   GLuint mode:8;    /**< GL_POINTS, GL_LINES, GL_QUAD_STRIP, etc */
   GLuint indexed:1;
   GLuint begin:1;
   GLuint end:1;
   GLuint weak:1;
   GLuint no_current_update:1;
   GLuint is_indirect:1;
   GLuint pad:18;

   GLuint start;
   GLuint count;
   GLint basevertex;
   GLuint num_instances;
   GLuint base_instance;
   GLuint draw_id;

   GLsizeiptr indirect_offset;
};

/* Would like to call this a "vbo_index_buffer", but this would be
 * confusing as the indices are not neccessarily yet in a non-null
 * buffer object.
 */
struct _mesa_index_buffer {
   GLuint count;
   GLenum type;
   struct gl_buffer_object *obj;
   const void *ptr;
};



GLboolean _vbo_CreateContext( struct gl_context *ctx );
void _vbo_DestroyContext( struct gl_context *ctx );
void _vbo_InvalidateState( struct gl_context *ctx, GLbitfield new_state );


void
vbo_initialize_exec_dispatch(const struct gl_context *ctx,
                             struct _glapi_table *exec);

void
vbo_initialize_save_dispatch(const struct gl_context *ctx,
                             struct _glapi_table *exec);

void vbo_exec_FlushVertices(struct gl_context *ctx, GLuint flags);
void vbo_save_SaveFlushVertices(struct gl_context *ctx);
GLboolean vbo_save_NotifyBegin(struct gl_context *ctx, GLenum mode);
void vbo_save_NewList(struct gl_context *ctx, GLuint list, GLenum mode);
void vbo_save_EndList(struct gl_context *ctx);
void vbo_save_BeginCallList(struct gl_context *ctx, struct gl_display_list *list);
void vbo_save_EndCallList(struct gl_context *ctx);


typedef void (*vbo_draw_func)( struct gl_context *ctx,
			       const struct _mesa_prim *prims,
			       GLuint nr_prims,
			       const struct _mesa_index_buffer *ib,
			       GLboolean index_bounds_valid,
			       GLuint min_index,
			       GLuint max_index,
			       struct gl_transform_feedback_object *tfb_vertcount,
                               unsigned stream,
			       struct gl_buffer_object *indirect);


typedef void (*vbo_indirect_draw_func)(
   struct gl_context *ctx,
   GLuint mode,
   struct gl_buffer_object *indirect_data,
   GLsizeiptr indirect_offset,
   unsigned draw_count,
   unsigned stride,
   struct gl_buffer_object *indirect_params,
   GLsizeiptr indirect_params_offset,
   const struct _mesa_index_buffer *ib);




/* Utility function to cope with various constraints on tnl modules or
 * hardware.  This can be used to split an incoming set of arrays and
 * primitives against the following constraints:
 *    - Maximum number of indices in index buffer.
 *    - Maximum number of vertices referenced by index buffer.
 *    - Maximum hardware vertex buffer size.
 */
struct split_limits {
   GLuint max_verts;
   GLuint max_indices;
   GLuint max_vb_size;		/* bytes */
};


void vbo_split_prims( struct gl_context *ctx,
		      const struct gl_vertex_array *arrays[],
		      const struct _mesa_prim *prim,
		      GLuint nr_prims,
		      const struct _mesa_index_buffer *ib,
		      GLuint min_index,
		      GLuint max_index,
		      vbo_draw_func draw,
		      const struct split_limits *limits );


/* Helpers for dealing translating away non-zero min_index.
 */
GLboolean vbo_all_varyings_in_vbos( const struct gl_vertex_array *arrays[] );
GLboolean vbo_any_varyings_in_vbos( const struct gl_vertex_array *arrays[] );

void vbo_rebase_prims( struct gl_context *ctx,
		       const struct gl_vertex_array *arrays[],
		       const struct _mesa_prim *prim,
		       GLuint nr_prims,
		       const struct _mesa_index_buffer *ib,
		       GLuint min_index,
		       GLuint max_index,
		       vbo_draw_func draw );

static inline int
vbo_sizeof_ib_type(GLenum type)
{
   switch (type) {
   case GL_UNSIGNED_INT:
      return sizeof(GLuint);
   case GL_UNSIGNED_SHORT:
      return sizeof(GLushort);
   case GL_UNSIGNED_BYTE:
      return sizeof(GLubyte);
   default:
      assert(!"unsupported index data type");
      /* In case assert is turned off */
      return 0;
   }
}

void
vbo_delete_minmax_cache(struct gl_buffer_object *bufferObj);

void
vbo_get_minmax_indices(struct gl_context *ctx, const struct _mesa_prim *prim,
                       const struct _mesa_index_buffer *ib,
                       GLuint *min_index, GLuint *max_index, GLuint nr_prims);

void vbo_use_buffer_objects(struct gl_context *ctx);

void vbo_always_unmap_buffers(struct gl_context *ctx);

void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func);

void vbo_set_indirect_draw_func(struct gl_context *ctx,
                                vbo_indirect_draw_func func);

void vbo_bind_arrays(struct gl_context *ctx);

size_t
vbo_count_tessellated_primitives(GLenum mode, GLuint count,
                                 GLuint num_instances);

void
vbo_try_prim_conversion(struct _mesa_prim *p);

bool
vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);

void
vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1);

void
vbo_sw_primitive_restart(struct gl_context *ctx,
                         const struct _mesa_prim *prim,
                         GLuint nr_prims,
                         const struct _mesa_index_buffer *ib,
                         struct gl_buffer_object *indirect);

void GLAPIENTRY
_es_Color4f(GLfloat r, GLfloat g, GLfloat b, GLfloat a);

void GLAPIENTRY
_es_Normal3f(GLfloat x, GLfloat y, GLfloat z);

void GLAPIENTRY
_es_MultiTexCoord4f(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);

void GLAPIENTRY
_es_Materialfv(GLenum face, GLenum pname, const GLfloat *params);

void GLAPIENTRY
_es_Materialf(GLenum face, GLenum pname, GLfloat param);

void GLAPIENTRY
_es_VertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);

void GLAPIENTRY
_es_VertexAttrib1f(GLuint indx, GLfloat x);

void GLAPIENTRY
_es_VertexAttrib1fv(GLuint indx, const GLfloat* values);

void GLAPIENTRY
_es_VertexAttrib2f(GLuint indx, GLfloat x, GLfloat y);

void GLAPIENTRY
_es_VertexAttrib2fv(GLuint indx, const GLfloat* values);

void GLAPIENTRY
_es_VertexAttrib3f(GLuint indx, GLfloat x, GLfloat y, GLfloat z);

void GLAPIENTRY
_es_VertexAttrib3fv(GLuint indx, const GLfloat* values);

void GLAPIENTRY
_es_VertexAttrib4fv(GLuint indx, const GLfloat* values);

#ifdef __cplusplus
} // extern "C"
#endif

#endif