135 lines
2.9 KiB
C++
135 lines
2.9 KiB
C++
#include <engine/platform/graphics/opengl/buffers.hpp>
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#include <glad/gl.h>
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namespace Light {
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//==================== CONSTANT_BUFFER ====================//
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glConstantBuffer::glConstantBuffer(ConstantBufferIndex index, unsigned int size)
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: m_buffer_id(NULL)
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, m_index(static_cast<int>(index))
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{
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glCreateBuffers(1, &m_buffer_id);
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glNamedBufferData(m_buffer_id, size, nullptr, GL_DYNAMIC_DRAW);
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bind();
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}
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glConstantBuffer::~glConstantBuffer()
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{
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glDeleteBuffers(1, &m_buffer_id);
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}
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void glConstantBuffer::bind()
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{
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glBindBufferBase(GL_UNIFORM_BUFFER, m_index, m_buffer_id);
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}
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auto glConstantBuffer::map() -> void *
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{
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auto *map = glMapNamedBuffer(m_buffer_id, GL_WRITE_ONLY);
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return map;
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}
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void glConstantBuffer::un_map()
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{
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glUnmapNamedBuffer(m_buffer_id);
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}
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//==================== CONSTANT_BUFFER ====================//
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//==================== VERTEX_BUFFER ====================//
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glVertexBuffer::glVertexBuffer(float *vertices, unsigned int stride, unsigned int count)
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: m_buffer_id(NULL)
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{
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glCreateBuffers(1, &m_buffer_id);
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glNamedBufferData(m_buffer_id, stride * count, vertices, GL_DYNAMIC_DRAW);
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}
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glVertexBuffer::~glVertexBuffer()
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{
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glDeleteBuffers(1, &m_buffer_id);
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}
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void glVertexBuffer::bind()
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{
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glBindBuffer(GL_ARRAY_BUFFER, m_buffer_id);
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}
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void glVertexBuffer::un_bind()
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{
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glBindBuffer(GL_ARRAY_BUFFER, NULL);
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}
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auto glVertexBuffer::map() -> void *
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{
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return glMapNamedBuffer(m_buffer_id, GL_WRITE_ONLY);
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}
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void glVertexBuffer::un_map()
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{
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glUnmapNamedBuffer(m_buffer_id);
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}
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//==================== VERTEX_BUFFER ====================//
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//==================== INDEX_BUFFER ====================//
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glIndexBuffer::glIndexBuffer(unsigned int *indices, unsigned int count): m_buffer_id(NULL)
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{
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// generate indices if not provided
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auto hasIndices = !!indices;
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if (!hasIndices)
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{
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// check
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if (count % 6 != 0)
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{
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lt_log(warn, "'indices' can only be null if count is multiple of 6");
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lt_log(
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warn,
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"Adding {} to 'count' -> {}",
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(6 - (count % 6)),
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count + (6 - (count % 6))
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);
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count = count + (6 - (count % 6));
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}
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// create indices
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indices = new unsigned int[count];
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auto offset = 0u;
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for (auto i = 0u; i < count; i += 6u)
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{
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indices[i + 0] = offset + 0u;
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indices[i + 1] = offset + 1u;
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indices[i + 2] = offset + 2u;
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indices[i + 3] = offset + 2u;
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indices[i + 4] = offset + 3u;
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indices[i + 5] = offset + 0u;
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offset += 4u;
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}
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}
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// create buffer
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glCreateBuffers(1, &m_buffer_id);
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glNamedBufferData(m_buffer_id, count * sizeof(unsigned int), indices, GL_STATIC_DRAW);
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// delete indices
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if (!hasIndices)
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delete[] indices;
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}
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glIndexBuffer::~glIndexBuffer()
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{
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glDeleteBuffers(1, &m_buffer_id);
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}
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void glIndexBuffer::bind()
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer_id);
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}
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void glIndexBuffer::un_bind()
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, NULL);
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}
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//==================== INDEX_BUFFER ====================//
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} // namespace Light
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