1#include "opengl_sl.h"
2
3#include <base/detect.h>
4
5#if defined(BACKEND_AS_OPENGL_ES) || !defined(CONF_BACKEND_OPENGL_ES)
6
7#include <cstdio>
8#include <engine/shared/linereader.h>
9#include <engine/storage.h>
10#include <string>
11#include <vector>
12
13#include <engine/client/backend/glsl_shader_compiler.h>
14#include <engine/graphics.h>
15
16#ifndef BACKEND_AS_OPENGL_ES
17#include <GL/glew.h>
18#else
19#include <GLES3/gl3.h>
20#endif
21
22bool CGLSL::LoadShader(CGLSLCompiler *pCompiler, IStorage *pStorage, const char *pFile, int Type)
23{
24 if(m_IsLoaded)
25 return true;
26
27 CLineReader LineReader;
28 std::vector<std::string> vLines;
29 if(LineReader.OpenFile(File: pStorage->OpenFile(pFilename: pFile, Flags: IOFLAG_READ, Type: IStorage::TYPE_ALL)))
30 {
31 EBackendType BackendType = pCompiler->m_IsOpenGLES ? BACKEND_TYPE_OPENGL_ES : BACKEND_TYPE_OPENGL;
32 bool IsNewOpenGL = (BackendType == BACKEND_TYPE_OPENGL ? (pCompiler->m_OpenGLVersionMajor >= 4 || (pCompiler->m_OpenGLVersionMajor == 3 && pCompiler->m_OpenGLVersionMinor == 3)) : pCompiler->m_OpenGLVersionMajor >= 3);
33 std::string GLShaderStringPostfix = std::string(" core\r\n");
34 if(BackendType == BACKEND_TYPE_OPENGL_ES)
35 GLShaderStringPostfix = std::string(" es\r\n");
36 //add compiler specific values
37 if(IsNewOpenGL)
38 vLines.push_back(x: std::string("#version ") + std::string(std::to_string(val: pCompiler->m_OpenGLVersionMajor)) + std::string(std::to_string(val: pCompiler->m_OpenGLVersionMinor)) + std::string(std::to_string(val: pCompiler->m_OpenGLVersionPatch)) + GLShaderStringPostfix);
39 else
40 {
41 if(pCompiler->m_OpenGLVersionMajor == 3)
42 {
43 if(pCompiler->m_OpenGLVersionMinor == 0)
44 vLines.emplace_back(args: "#version 130 \r\n");
45 if(pCompiler->m_OpenGLVersionMinor == 1)
46 vLines.emplace_back(args: "#version 140 \r\n");
47 if(pCompiler->m_OpenGLVersionMinor == 2)
48 vLines.emplace_back(args: "#version 150 \r\n");
49 }
50 else if(pCompiler->m_OpenGLVersionMajor == 2)
51 {
52 if(pCompiler->m_OpenGLVersionMinor == 0)
53 vLines.emplace_back(args: "#version 110 \r\n");
54 if(pCompiler->m_OpenGLVersionMinor == 1)
55 vLines.emplace_back(args: "#version 120 \r\n");
56 }
57 }
58
59 if(BackendType == BACKEND_TYPE_OPENGL_ES)
60 {
61 if(Type == GL_FRAGMENT_SHADER)
62 {
63 vLines.emplace_back(args: "precision highp float; \r\n");
64 vLines.emplace_back(args: "precision highp sampler2D; \r\n");
65 vLines.emplace_back(args: "precision highp sampler3D; \r\n");
66 vLines.emplace_back(args: "precision highp samplerCube; \r\n");
67 vLines.emplace_back(args: "precision highp samplerCubeShadow; \r\n");
68 vLines.emplace_back(args: "precision highp sampler2DShadow; \r\n");
69 vLines.emplace_back(args: "precision highp sampler2DArray; \r\n");
70 vLines.emplace_back(args: "precision highp sampler2DArrayShadow; \r\n");
71 }
72 }
73
74 for(const CGLSLCompiler::SGLSLCompilerDefine &Define : pCompiler->m_vDefines)
75 {
76 vLines.push_back(x: std::string("#define ") + Define.m_DefineName + std::string(" ") + Define.m_DefineValue + std::string("\r\n"));
77 }
78
79 if(Type == GL_FRAGMENT_SHADER && !IsNewOpenGL && pCompiler->m_OpenGLVersionMajor <= 3 && pCompiler->m_HasTextureArray)
80 {
81 vLines.emplace_back(args: "#extension GL_EXT_texture_array : enable\r\n");
82 }
83
84 while(const char *pReadLine = LineReader.Get())
85 {
86 std::string Line;
87 pCompiler->ParseLine(Line, pReadLine, Type: Type == GL_FRAGMENT_SHADER ? GLSL_SHADER_COMPILER_TYPE_FRAGMENT : GLSL_SHADER_COMPILER_TYPE_VERTEX);
88 Line.append(s: "\r\n");
89 vLines.push_back(x: Line);
90 }
91
92 const char **ShaderCode = new const char *[vLines.size()];
93
94 for(size_t i = 0; i < vLines.size(); ++i)
95 {
96 ShaderCode[i] = vLines[i].c_str();
97 }
98
99 TWGLuint shader = glCreateShader(Type);
100
101 glShaderSource(shader, vLines.size(), ShaderCode, NULL);
102 glCompileShader(shader);
103
104 delete[] ShaderCode;
105
106 int CompilationStatus;
107 glGetShaderiv(shader, GL_COMPILE_STATUS, &CompilationStatus);
108
109 if(CompilationStatus == GL_FALSE)
110 {
111 char aBuf[3000];
112
113 TWGLint maxLength = 0;
114 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength);
115
116 glGetShaderInfoLog(shader, maxLength, &maxLength, aBuf);
117
118 dbg_msg(sys: "glsl", fmt: "%s: %s", pFile, aBuf);
119 glDeleteShader(shader);
120 return false;
121 }
122 m_Type = Type;
123 m_IsLoaded = true;
124
125 m_ShaderId = shader;
126
127 return true;
128 }
129 else
130 return false;
131}
132
133void CGLSL::DeleteShader()
134{
135 if(!IsLoaded())
136 return;
137 m_IsLoaded = false;
138 glDeleteShader(m_ShaderId);
139}
140
141bool CGLSL::IsLoaded() const
142{
143 return m_IsLoaded;
144}
145
146TWGLuint CGLSL::GetShaderId() const
147{
148 return m_ShaderId;
149}
150
151CGLSL::CGLSL()
152{
153 m_IsLoaded = false;
154}
155
156CGLSL::~CGLSL()
157{
158 DeleteShader();
159}
160
161#endif
162