portersky
30ddaf7d39
- Add glm dependency for matrix transformations - Replace triangle with 6-face colored cube - Add MVP shader uniforms (model, view, projection) - Enable depth testing for proper 3D rendering - Spin cube around (1, 0.5, 0.3) axis style: fix trailing return type for move assignment operators - buffer/texture/shader/vao: use auto fn() -> T& style - Document trailing return type convention in AGENTS.md
111 lines
2.3 KiB
C++
111 lines
2.3 KiB
C++
#include "cbt/opengl/shader.hpp"
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#include <iostream>
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#include <string>
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#include "fmt/std.h"
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namespace cbt::opengl {
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shader::shader() {}
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shader::~shader() {
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if (m_id) {
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glDeleteProgram(m_id);
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}
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}
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shader::shader(shader&& other) noexcept
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: m_id(other.m_id) {
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other.m_id = 0;
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}
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auto shader::operator=(shader&& other) noexcept -> shader& {
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if (this != &other) {
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if (m_id) {
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glDeleteProgram(m_id);
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}
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m_id = other.m_id;
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other.m_id = 0;
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}
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return *this;
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}
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auto shader::compile_vertex(char const* source) -> bool {
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auto vert = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(vert, 1, &source, nullptr);
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glCompileShader(vert);
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GLint success;
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glGetShaderiv(vert, GL_COMPILE_STATUS, &success);
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if (!success) {
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GLchar info[512];
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glGetShaderInfoLog(vert, 512, nullptr, info);
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fmt::print("Vertex shader compile error:\n{}\n", info);
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glDeleteShader(vert);
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return false;
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}
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if (m_id) {
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glDeleteProgram(m_id);
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}
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m_id = glCreateProgram();
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glAttachShader(m_id, vert);
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glDeleteShader(vert);
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return true;
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}
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auto shader::compile_fragment(char const* source) -> bool {
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auto frag = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(frag, 1, &source, nullptr);
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glCompileShader(frag);
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GLint success;
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glGetShaderiv(frag, GL_COMPILE_STATUS, &success);
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if (!success) {
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GLchar info[512];
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glGetShaderInfoLog(frag, 512, nullptr, info);
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fmt::print("Fragment shader compile error:\n{}\n", info);
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glDeleteShader(frag);
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return false;
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}
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glAttachShader(m_id, frag);
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glDeleteShader(frag);
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return true;
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}
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auto shader::link() -> bool {
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glLinkProgram(m_id);
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GLint success;
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glGetProgramiv(m_id, GL_LINK_STATUS, &success);
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if (!success) {
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GLchar info[512];
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glGetProgramInfoLog(m_id, 512, nullptr, info);
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fmt::print("Shader link error:\n{}\n", info);
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glDeleteProgram(m_id);
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m_id = 0;
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return false;
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}
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return true;
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}
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auto shader::use() const -> void {
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glUseProgram(m_id);
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}
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auto shader::unuse() const -> void {
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glUseProgram(0);
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}
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auto shader::id() const -> GLuint {
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return m_id;
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}
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auto shader::valid() const -> bool {
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return m_id != 0;
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}
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}
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