| 95 | } |
| 96 | |
| 97 | bool ShaderProgram::create(const std::string_view v_source, |
| 98 | const std::string_view f_source, |
| 99 | const TexelChannels texel_format, |
| 100 | const std::string& pixel_layout, |
| 101 | const std::vector<std::string>& uniforms) { |
| 102 | if (program_ != 0) { |
| 103 | // Check if the program needs to be recompiled |
| 104 | if (!is_shader_outdated(texel_format, uniforms, pixel_layout)) { |
| 105 | return true; |
| 106 | } |
| 107 | // Delete old program |
| 108 | gl_canvas_.glDeleteProgram(program_); |
| 109 | } |
| 110 | |
| 111 | texel_format_ = texel_format; |
| 112 | pixel_layout_ = pixel_layout.substr(0, 4); |
| 113 | // Convert std::string_view to std::string for OpenGL API (requires |
| 114 | // null-terminated strings) |
| 115 | const auto vertex_shader = |
| 116 | compile(GL_VERTEX_SHADER, std::string(v_source).c_str()); |
| 117 | const auto fragment_shader = |
| 118 | compile(GL_FRAGMENT_SHADER, std::string(f_source).c_str()); |
| 119 | |
| 120 | if (vertex_shader == 0 || fragment_shader == 0) [[unlikely]] { |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | program_ = gl_canvas_.glCreateProgram(); |
| 125 | gl_canvas_.glAttachShader(program_, vertex_shader); |
| 126 | gl_canvas_.glAttachShader(program_, fragment_shader); |
| 127 | gl_canvas_.glLinkProgram(program_); |
| 128 | |
| 129 | // Delete shaders. We don't need them anymore. |
| 130 | gl_canvas_.glDeleteShader(vertex_shader); |
| 131 | gl_canvas_.glDeleteShader(fragment_shader); |
| 132 | |
| 133 | // Check for link errors |
| 134 | auto linked = GLint{}; |
| 135 | gl_canvas_.glGetProgramiv(program_, GL_LINK_STATUS, &linked); |
| 136 | if (!linked) [[unlikely]] { |
| 137 | GLint length; |
| 138 | gl_canvas_.glGetProgramiv(program_, GL_INFO_LOG_LENGTH, &length); |
| 139 | auto log = std::string(length, ' '); |
| 140 | gl_canvas_.glGetProgramInfoLog(program_, length, &length, &log[0]); |
| 141 | std::cerr << "[Error] Failed to link shader program:" << std::endl |
| 142 | << log << std::endl; |
| 143 | gl_canvas_.glDeleteProgram(program_); |
| 144 | program_ = 0; |
| 145 | return false; |
| 146 | } |
| 147 | |
| 148 | // Get uniform locations |
| 149 | for (const auto& name : uniforms) { |
| 150 | const auto loc = |
| 151 | gl_canvas_.glGetUniformLocation(program_, name.c_str()); |
| 152 | uniforms_[name] = loc; |
| 153 | } |
| 154 |
no test coverage detected