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mirror of synced 2024-12-13 16:31:07 +01:00
ImHex/lib/libimhex/include/hex/helpers/opengl.hpp

120 lines
2.4 KiB
C++

#pragma once
#include <hex.hpp>
#include <hex/helpers/concepts.hpp>
#include <span>
#include <string>
#include <imgui_impl_opengl3_loader.h>
namespace hex::gl {
namespace {
template<typename T>
GLuint getType() {
if constexpr (std::is_same_v<T, float>)
return GL_FLOAT;
else if constexpr (std::is_same_v<T, u32>)
return GL_UNSIGNED_INT;
else
static_assert(hex::always_false<T>::value, "Unsupported type");
}
}
class Shader {
public:
Shader(const std::string &vertexSource, const std::string &fragmentSource);
~Shader();
void bind() const;
void unbind() const;
private:
void compile(GLuint shader, const std::string &source);
private:
GLuint m_program;
};
enum class BufferType {
Vertex = GL_ARRAY_BUFFER,
Index = GL_ELEMENT_ARRAY_BUFFER
};
template<typename T>
class Buffer {
public:
Buffer(BufferType type, std::span<T> data);
~Buffer();
void bind() const;
void unbind() const;
void draw() const;
size_t getSize() const;
private:
GLuint m_buffer;
size_t m_size;
GLuint m_type;
};
extern template class Buffer<float>;
extern template class Buffer<u32>;
class VertexArray {
public:
VertexArray();
~VertexArray();
template<typename T>
void addBuffer(const Buffer<T> &buffer) const {
glVertexAttribPointer(0, buffer.getSize() / sizeof(T), getType<T>(), GL_FALSE, 3 * sizeof(T), nullptr);
glEnableVertexAttribArray(0);
}
void bind() const;
void unbind() const;
private:
GLuint m_array;
};
class Texture {
public:
Texture(u32 width, u32 height);
~Texture();
void bind() const;
void unbind() const;
GLuint getTexture() const;
u32 getWidth() const;
u32 getHeight() const;
void release();
private:
GLuint m_texture;
u32 m_width, m_height;
};
class FrameBuffer {
public:
FrameBuffer();
~FrameBuffer();
void bind() const;
void unbind() const;
void attachTexture(const Texture &texture) const;
private:
GLuint m_frameBuffer, m_renderBuffer;
};
}