Clément Foucault
efc97b3919
This changes the drawing paradigm a bit. The VAO configuration is done JIT-style and depends on context active shader. This is to allow more flexibility for implementations to do optimization at lower level. The vao cache is now its own class to isolate the concept. It is this class that is reference by the GLContext for ownership of the containing VAO ids.
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/*
|
|
* 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.
|
|
*
|
|
* Copyright 2020, Blender Foundation.
|
|
* All rights reserved.
|
|
*/
|
|
|
|
/** \file
|
|
* \ingroup gpu
|
|
*
|
|
* GPU geometry batch
|
|
* Contains VAOs + VBOs + Shader representing a drawable entity.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "MEM_guardedalloc.h"
|
|
|
|
#include "gpu_batch_private.hh"
|
|
|
|
#include "glew-mx.h"
|
|
|
|
#include "GPU_shader_interface.h"
|
|
|
|
namespace blender {
|
|
namespace gpu {
|
|
|
|
#define GPU_VAO_STATIC_LEN 3
|
|
|
|
/* Vao management: remembers all geometry state (vertex attribute bindings & element buffer)
|
|
* for each shader interface. Start with a static number of vaos and fallback to dynamic count
|
|
* if necessary. Once a batch goes dynamic it does not go back. */
|
|
class GLVaoCache {
|
|
private:
|
|
/** Context for which the vao_cache_ was generated. */
|
|
struct GLContext *context_ = NULL;
|
|
/** Last interface this batch was drawn with. */
|
|
GPUShaderInterface *interface_ = NULL;
|
|
/** Cached vao for the last interface. */
|
|
GLuint vao_id_ = 0;
|
|
/** Used whend arb_base_instance is not supported. */
|
|
GLuint vao_base_instance_ = 0;
|
|
int base_instance_ = 0;
|
|
|
|
bool is_dynamic_vao_count = false;
|
|
union {
|
|
/** Static handle count */
|
|
struct {
|
|
const GPUShaderInterface *interfaces[GPU_VAO_STATIC_LEN];
|
|
GLuint vao_ids[GPU_VAO_STATIC_LEN];
|
|
} static_vaos;
|
|
/** Dynamic handle count */
|
|
struct {
|
|
uint count;
|
|
const GPUShaderInterface **interfaces;
|
|
GLuint *vao_ids;
|
|
} dynamic_vaos;
|
|
};
|
|
|
|
public:
|
|
GLVaoCache();
|
|
~GLVaoCache();
|
|
|
|
GLuint vao_get(GPUBatch *batch);
|
|
GLuint base_instance_vao_get(GPUBatch *batch, int i_first);
|
|
|
|
GLuint lookup(const GPUShaderInterface *interface);
|
|
void insert(const GPUShaderInterface *interface, GLuint vao_id);
|
|
void remove(const GPUShaderInterface *interface);
|
|
void clear(void);
|
|
|
|
private:
|
|
void init(void);
|
|
void context_check(void);
|
|
};
|
|
|
|
class GLBatch : public Batch {
|
|
public:
|
|
/** All vaos corresponding to all the GPUShaderInterface this batch was drawn with. */
|
|
GLVaoCache vao_cache_;
|
|
|
|
public:
|
|
GLBatch();
|
|
~GLBatch();
|
|
|
|
void draw(int v_first, int v_count, int i_first, int i_count) override;
|
|
|
|
private:
|
|
void bind(int i_first);
|
|
|
|
MEM_CXX_CLASS_ALLOC_FUNCS("GLBatch");
|
|
};
|
|
|
|
} // namespace gpu
|
|
} // namespace blender
|