1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_SHADERTECHNIQUE
#define INCLUDED_SHADERTECHNIQUE
#include "graphics/ShaderDefines.h"
#include "graphics/ShaderProgram.h"
#include "graphics/ShaderTechniquePtr.h"
#include "lib/file/vfs/vfs_path.h"
#include "renderer/backend/PipelineState.h"
#include <vector>
/**
* Implements a render pass consisting of various GL state changes and a shader,
* used by CShaderTechnique.
*/
class CShaderPass
{
public:
CShaderPass(const Renderer::Backend::GraphicsPipelineStateDesc& pipelineStateDesc, const CShaderProgramPtr& shader);
Renderer::Backend::IShaderProgram* GetShader() const { return m_Shader->GetBackendShaderProgram(); }
const Renderer::Backend::GraphicsPipelineStateDesc&
GetPipelineStateDesc() const { return m_PipelineStateDesc; }
private:
CShaderProgramPtr m_Shader;
Renderer::Backend::GraphicsPipelineStateDesc m_PipelineStateDesc{};
};
/**
* Implements a render technique consisting of a sequence of passes.
* CShaderManager loads these from shader effect XML files.
*/
class CShaderTechnique
{
public:
CShaderTechnique(const VfsPath& path, const CShaderDefines& defines);
void SetPasses(std::vector<CShaderPass>&& passes);
int GetNumPasses() const;
Renderer::Backend::IShaderProgram* GetShader(int pass = 0) const;
const Renderer::Backend::GraphicsPipelineStateDesc&
GetGraphicsPipelineStateDesc(int pass = 0) const;
/**
* Whether this technique uses alpha blending that requires objects to be
* drawn from furthest to nearest.
*/
bool GetSortByDistance() const;
void SetSortByDistance(bool enable);
const VfsPath& GetPath() { return m_Path; }
const CShaderDefines& GetShaderDefines() { return m_Defines; }
private:
std::vector<CShaderPass> m_Passes;
bool m_SortByDistance = false;
// We need additional data to reload the technique.
VfsPath m_Path;
CShaderDefines m_Defines;
};
#endif // INCLUDED_SHADERTECHNIQUE
|
