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Experiment in graphics programming, C++, OpenGL, simulation techniques.

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703 Sep 2023 16:015f524c5OpenGL render abstractionsJosh Stockin1930G

Blob @ zydeco / src / render / gl / GLRenderObject.cpp

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1#include <list>
2
3#include "ZydecoCommon.hpp"
4#include "GLRenderObject.hpp"
5#include "GLProgram.hpp"
6
7
8static Logger LOGGER("GLRenderObject");
9
10// static initialize
11std::map<uint64_t, std::list<GLRenderObject*>> GLRenderObject::s_renderObjects = {};
12
13
14GLRenderObject::GLRenderObject(std::string gl_program_name, uint64_t render_priority):
15 m_renderPriority(render_priority),
16 m_renderEnabled(true)
17{
18 m_glProgram = GLProgram::GetGLProgram(gl_program_name);
19 if (m_glProgram == nullptr) { ZydecoFault("GLRenderObject(): Program '{}' is nonexistent", gl_program_name); }
20
21 s_renderObjects.insert(std::pair<uint64_t, std::list<GLRenderObject*>>(render_priority, {}));
22 s_renderObjects.at(render_priority).push_back(this);
23}
24
25GLRenderObject::~GLRenderObject()
26{
27 s_renderObjects.at(m_renderPriority).remove(this);
28 if (s_renderObjects.at(m_renderPriority).empty())
29 {
30 s_renderObjects.erase(m_renderPriority);
31 }
32}
33
34void GLRenderObject::RenderEnable()
35{
36 m_renderEnabled = true;
37}
38
39void GLRenderObject::RenderDisable()
40{
41 m_renderEnabled = false;
42}
43
44void GLRenderObject::GLTargetSetup()
45{
46 glUseProgram(m_glProgram->GetGLProgramID());
47
48 for (std::pair<std::string, glUniform> uniform : m_uniforms)
49 {
50 int location = glGetUniformLocation(m_glProgram->GetGLProgramID(), uniform.first.c_str());
51 if (location == -1)
52 {
53 LOGGER.Log(Logger::ERROR, "Render(): Uniform '{}' does not exist for program '{}'", uniform.first, m_glProgram->GetGLProgramName());
54 continue;
55 }
56
57 if (uniform.second.type == glUniformType::FLOAT)
58 {
59 switch (uniform.second.quantity)
60 {
61 case 1: glUniform1f(location, *(float*)(uniform.second.data[0])); break;
62 case 2: glUniform2f(location, *(float*)(uniform.second.data[0]), *(float*)(uniform.second.data[1])); break;
63 case 3: glUniform3f(location, *(float*)(uniform.second.data[0]), *(float*)(uniform.second.data[1]), *(float*)(uniform.second.data[2])); break;
64 case 4: glUniform4f(location, *(float*)(uniform.second.data[0]), *(float*)(uniform.second.data[1]), *(float*)(uniform.second.data[2]), *(float*)(uniform.second.data[3])); break;
65 }
66 }
67 else if (uniform.second.type == glUniformType::INT)
68 {
69 switch (uniform.second.quantity)
70 {
71 case 1: glUniform1i(location, *(int*)(uniform.second.data[0])); break;
72 case 2: glUniform2i(location, *(int*)(uniform.second.data[0]), *(int*)(uniform.second.data[1])); break;
73 case 3: glUniform3i(location, *(int*)(uniform.second.data[0]), *(int*)(uniform.second.data[1]), *(int*)(uniform.second.data[2])); break;
74 case 4: glUniform4i(location, *(int*)(uniform.second.data[0]), *(int*)(uniform.second.data[1]), *(int*)(uniform.second.data[2]), *(int*)(uniform.second.data[3])); break;
75 }
76 }
77 else if (uniform.second.type == glUniformType::UINT)
78 {
79 switch (uniform.second.quantity)
80 {
81 case 1: glUniform1ui(location, *(unsigned int*)(uniform.second.data[0])); break;
82 case 2: glUniform2ui(location, *(unsigned int*)(uniform.second.data[0]), *(unsigned int*)(uniform.second.data[1])); break;
83 case 3: glUniform3ui(location, *(unsigned int*)(uniform.second.data[0]), *(unsigned int*)(uniform.second.data[1]), *(unsigned int*)(uniform.second.data[2])); break;
84 case 4: glUniform4ui(location, *(unsigned int*)(uniform.second.data[0]), *(unsigned int*)(uniform.second.data[1]), *(unsigned int*)(uniform.second.data[2]), *(unsigned int*)(uniform.second.data[3])); break;
85 }
86 }
87 }
88}
89
90std::map<uint64_t, std::list<GLRenderObject*>>& GLRenderObject::GetRenderObjects()
91{
92 return s_renderObjects;
93}
94