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#include "Framebuffer.hpp"
#include "OpenGL.hpp"
CFramebuffer::CFramebuffer() {
;
}
bool CFramebuffer::alloc(int w, int h, uint32_t drmFormat) {
bool firstAlloc = false;
RASSERT((w > 0 && h > 0), "cannot alloc a FB with negative / zero size! (attempted {}x{})", w, h);
uint32_t glFormat = NFormatUtils::drmFormatToGL(drmFormat);
uint32_t glType = NFormatUtils::glFormatToType(glFormat);
if (drmFormat != m_drmFormat || m_size != Vector2D{w, h})
release();
m_drmFormat = drmFormat;
if (!m_tex) {
m_tex = makeShared<CTexture>();
m_tex->allocate();
m_tex->bind();
m_tex->setTexParameter(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
m_tex->setTexParameter(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
m_tex->setTexParameter(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
m_tex->setTexParameter(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
firstAlloc = true;
}
if (!m_fbAllocated) {
glGenFramebuffers(1, &m_fb);
m_fbAllocated = true;
firstAlloc = true;
}
if (firstAlloc || m_size != Vector2D(w, h)) {
m_tex->bind();
glTexImage2D(GL_TEXTURE_2D, 0, glFormat, w, h, 0, GL_RGBA, glType, nullptr);
glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_tex->m_texID, 0);
if (m_stencilTex) {
m_stencilTex->bind();
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, w, h, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
}
auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
RASSERT((status == GL_FRAMEBUFFER_COMPLETE), "Framebuffer incomplete, couldn't create! (FB status: {}, GL Error: 0x{:x})", status, (int)glGetError());
Debug::log(LOG, "Framebuffer created, status {}", status);
}
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
m_size = Vector2D(w, h);
return true;
}
void CFramebuffer::addStencil(SP<CTexture> tex) {
m_stencilTex = tex;
m_stencilTex->bind();
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, m_size.x, m_size.y, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);
glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
RASSERT((status == GL_FRAMEBUFFER_COMPLETE), "Failed adding a stencil to fbo!", status);
m_stencilTex->unbind();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void CFramebuffer::bind() {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fb);
if (g_pHyprOpenGL)
g_pHyprOpenGL->setViewport(0, 0, g_pHyprOpenGL->m_renderData.pMonitor->m_pixelSize.x, g_pHyprOpenGL->m_renderData.pMonitor->m_pixelSize.y);
else
glViewport(0, 0, m_size.x, m_size.y);
}
void CFramebuffer::unbind() {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
}
void CFramebuffer::release() {
if (m_fbAllocated) {
glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &m_fb);
m_fbAllocated = false;
m_fb = 0;
}
if (m_tex)
m_tex.reset();
m_size = Vector2D();
}
CFramebuffer::~CFramebuffer() {
release();
}
bool CFramebuffer::isAllocated() {
return m_fbAllocated && m_tex;
}
SP<CTexture> CFramebuffer::getTexture() {
return m_tex;
}
GLuint CFramebuffer::getFBID() {
return m_fbAllocated ? m_fb : 0;
}
SP<CTexture> CFramebuffer::getStencilTex() {
return m_stencilTex;
}
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