99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
/*
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* <Short Description>
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* Copyright (C) 2025 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <vao.h>
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#include <blt/gfx/window.h>
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#include <blt/std/assert.h>
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#include <blt/std/hashmap.h>
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namespace blt::gfx
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{
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#define ENSURE_CONTEXT_BOUND BLT_CONTRACT(glfwGetCurrentContext() != nullptr, "Expected active OpenGL context!")
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#if blt_debug_has_flag(BLT_DEBUG_CONTRACTS)
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GLuint bound_vao_id;
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#endif
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detail::vao_vbo_context_t& detail::vao_vbo_context_t::attribute_ptr(const int attribute_number, const int coordinate_size, const GLenum type,
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const int stride, const long offset)
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{
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if (auto& vec = vbo.attribute_numbers)
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{
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for (const auto& v : *vec)
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{
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if (static_cast<i32>(v) == attribute_number)
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goto use;
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}
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vec->push_back(attribute_number);
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}
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use:
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glEnableVertexAttribArray(attribute_number);
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glVertexAttribPointer(attribute_number, coordinate_size, type, GL_FALSE, stride < 0 ? 0 : stride, reinterpret_cast<void*>(offset));
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attributed = true;
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return *this;
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}
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detail::vao_vbo_context_t::~vao_vbo_context_t()
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{
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#if blt_debug_has_flag(BLT_DEBUG_CONTRACTS)
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if (!(vbo.is_element() || attributed))
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{
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BLT_WARN("VBO is not an element array buffer or been assigned to an attribute, are you sure this is what you want?");
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BLT_WARN("You can silence this warning by calling .silence()");
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}
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#endif
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}
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detail::vao_context_t& detail::vao_context_t::bind()
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{
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ENSURE_CONTEXT_BOUND;
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BLT_CONTRACT(vao.vaoID, "Expected VAO to have an associated VAO ID!");
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glBindVertexArray(*vao.vaoID);
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bound_vao_id = *vao.vaoID;
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return *this;
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}
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detail::vao_context_t& detail::vao_context_t::unbind() // NOLINT
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{
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glBindVertexArray(0);
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bound_vao_id = 0;
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return *this;
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}
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detail::vao_vbo_context_t detail::vao_context_t::attach_vbo(unique_vbo_t&& vbo) const
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{
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ENSURE_CONTEXT_BOUND;
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BLT_CONTRACT(vao.vaoID, "Expected VAO to have an associated VAO ID!");
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BLT_CONTRACT(is_bound(), "Expected VAO to be bound before attaching VBO! (If you are using this API correctly, this has been done for you!)");
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auto& vbo_storage = vao.vbo_list.emplace_back(std::move(vbo));
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vbo_storage.vbo->bind();
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return vao_vbo_context_t{vao, vbo_storage};
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}
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bool detail::vao_context_t::is_bound() const
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{
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return *vao.vaoID == bound_vao_id;
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}
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detail::vao_context_t unique_vao_t::bind()
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{
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ENSURE_CONTEXT_BOUND;
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return detail::vao_context_t{*this};
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}
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}
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