84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
#include <glad/gl.h>
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#include <renderer/gl/framebuffers.hpp>
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namespace lt {
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glFramebuffer::glFramebuffer(const FramebufferSpecification &specification)
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: m_specification(specification)
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, m_buffer_id()
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, m_color_attachment_id()
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, m_depth_stencil_attachment_id()
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{
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resize({ specification.width, specification.height });
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}
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glFramebuffer::~glFramebuffer()
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{
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glDeleteFramebuffers(1, &m_buffer_id);
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glDeleteTextures(1, &m_color_attachment_id);
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// glDeleteTextures(1, &m_depth_stencil_attachment_id);
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}
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void glFramebuffer::bind_as_target(const math::vec4 &clearColor)
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{
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// #todo: use viewport instead of default x=0, y=0
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glBindFramebuffer(GL_FRAMEBUFFER, m_buffer_id);
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glViewport(0, 0, m_specification.width, m_specification.height);
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glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);
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glClear(GL_COLOR_BUFFER_BIT);
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}
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void glFramebuffer::bind_as_resource()
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{
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log_err("NO_IMPLEMENT!");
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}
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void glFramebuffer::resize(const math::uvec2 &size)
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{
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if (m_buffer_id)
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{
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glDeleteFramebuffers(1, &m_buffer_id);
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glDeleteTextures(1, &m_color_attachment_id);
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// glDeleteTextures(1, &m_depth_stencil_attachment_id);
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}
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m_specification.width = std::clamp(size.x, 1u, (unsigned int)GL_MAX_TEXTURE_SIZE);
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m_specification.height = std::clamp(size.y, 1u, (unsigned int)GL_MAX_TEXTURE_SIZE);
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glCreateFramebuffers(1, &m_buffer_id);
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glBindFramebuffer(GL_FRAMEBUFFER, m_buffer_id);
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// create color attachment
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glCreateTextures(GL_TEXTURE_2D, 1, &m_color_attachment_id);
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glBindTexture(GL_TEXTURE_2D, m_color_attachment_id);
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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GL_RGBA8,
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m_specification.width,
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m_specification.height,
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{},
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GL_RGBA,
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GL_UNSIGNED_BYTE,
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nullptr
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);
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glTextureParameteri(m_color_attachment_id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTextureParameteri(m_color_attachment_id, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(
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GL_FRAMEBUFFER,
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GL_COLOR_ATTACHMENT0,
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GL_TEXTURE_2D,
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m_color_attachment_id,
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0
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);
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ensure(
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(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE),
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"Framebuffer is incomplete"
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);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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} // namespace lt
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