105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
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* Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGL/GL/gl.h>
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#include <LibGL/Shaders/Program.h>
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#include <LibGLSL/Linker.h>
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namespace GL {
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NonnullRefPtr<Program> Program::create()
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{
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return adopt_ref(*new Program());
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}
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bool Program::is_shader_attached(Shader const& shader) const
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{
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switch (shader.type()) {
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case GL_VERTEX_SHADER:
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return m_vertex_shaders.contains_slow(shader);
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case GL_FRAGMENT_SHADER:
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return m_fragment_shaders.contains_slow(shader);
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default:
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VERIFY_NOT_REACHED();
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}
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}
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ErrorOr<void> Program::attach_shader(Shader& shader)
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{
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if (is_shader_attached(shader))
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return Error::from_string_literal("Trying to attach a shader that is already attached");
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switch (shader.type()) {
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case GL_VERTEX_SHADER:
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TRY(m_vertex_shaders.try_append(shader));
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break;
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case GL_FRAGMENT_SHADER:
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TRY(m_fragment_shaders.try_append(shader));
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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return {};
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}
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ErrorOr<void> Program::link(GPU::Device& device)
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{
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m_info_log = String {};
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GLSL::Linker linker;
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// Link vertex shader objects
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Vector<GLSL::ObjectFile const*> vertex_shader_object_files;
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for (auto const& vertex_shader : m_vertex_shaders)
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vertex_shader_object_files.append(vertex_shader->object_file());
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auto linked_vertex_shader_or_error = linker.link(vertex_shader_object_files);
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if (linked_vertex_shader_or_error.is_error()) {
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m_link_status = false;
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m_info_log = linker.messages();
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return linked_vertex_shader_or_error.release_error();
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}
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m_linked_vertex_shader = linked_vertex_shader_or_error.release_value();
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// Link fragment shader objects
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Vector<GLSL::ObjectFile const*> fragment_shader_object_files;
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for (auto fragment_shader : m_fragment_shaders)
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fragment_shader_object_files.append(fragment_shader->object_file());
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auto linked_fragment_shader_or_error = linker.link(fragment_shader_object_files);
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if (linked_fragment_shader_or_error.is_error()) {
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m_link_status = false;
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m_info_log = linker.messages();
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return linked_fragment_shader_or_error.release_error();
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}
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m_linked_fragment_shader = linked_fragment_shader_or_error.release_value();
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m_gpu_vertex_shader = TRY(device.create_shader(m_linked_vertex_shader->intermediate_shader_representation()));
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m_gpu_fragment_shader = TRY(device.create_shader(m_linked_fragment_shader->intermediate_shader_representation()));
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m_link_status = true;
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return {};
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}
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size_t Program::info_log_length() const
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{
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if (!m_info_log.has_value())
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return 0;
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// Per the spec we return the size including the null terminator
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return m_info_log.value().bytes().size() + 1;
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}
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}
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