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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 > 1 && h > 1), "cannot alloc a FB with negative / zero size! (attempted {}x{})", w, h);
uint32_t glFormat = FormatUtils::drmFormatToGL(drmFormat);
uint32_t glType = FormatUtils::glFormatToType(glFormat);
if (!m_cTex)
m_cTex = makeShared<CTexture>();
if (!m_iFbAllocated) {
firstAlloc = true;
glGenFramebuffers(1, &m_iFb);
m_iFbAllocated = true;
}
if (m_cTex->m_iTexID == 0) {
firstAlloc = true;
m_cTex->allocate();
glBindTexture(GL_TEXTURE_2D, m_cTex->m_iTexID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
if (firstAlloc || m_vSize != Vector2D(w, h)) {
glBindTexture(GL_TEXTURE_2D, m_cTex->m_iTexID);
glTexImage2D(GL_TEXTURE_2D, 0, glFormat, w, h, 0, GL_RGBA, glType, 0);
glBindFramebuffer(GL_FRAMEBUFFER, m_iFb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_cTex->m_iTexID, 0);
// TODO: Allow this with gles2
#ifndef GLES2
if (m_pStencilTex) {
glBindTexture(GL_TEXTURE_2D, m_pStencilTex->m_iTexID);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, w, h, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, 0);
glBindFramebuffer(GL_FRAMEBUFFER, m_iFb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_pStencilTex->m_iTexID, 0);
}
#endif
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);
if (g_pHyprOpenGL)
glBindFramebuffer(GL_FRAMEBUFFER, g_pHyprOpenGL->m_iCurrentOutputFb);
m_vSize = Vector2D(w, h);
return true;
}
void CFramebuffer::addStencil(SP<CTexture> tex) {
// TODO: Allow this with gles2
#ifndef GLES2
m_pStencilTex = tex;
glBindTexture(GL_TEXTURE_2D, m_pStencilTex->m_iTexID);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, m_vSize.x, m_vSize.y, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, 0);
glBindFramebuffer(GL_FRAMEBUFFER, m_iFb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_pStencilTex->m_iTexID, 0);
auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
RASSERT((status == GL_FRAMEBUFFER_COMPLETE), "Failed adding a stencil to fbo!", status);
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, g_pHyprOpenGL->m_iCurrentOutputFb);
#endif
}
void CFramebuffer::bind() {
#ifndef GLES2
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_iFb);
#else
glBindFramebuffer(GL_FRAMEBUFFER, m_iFb);
#endif
if (g_pHyprOpenGL)
glViewport(0, 0, g_pHyprOpenGL->m_RenderData.pMonitor->vecPixelSize.x, g_pHyprOpenGL->m_RenderData.pMonitor->vecPixelSize.y);
else
glViewport(0, 0, m_vSize.x, m_vSize.y);
}
void CFramebuffer::release() {
if (m_iFbAllocated)
glDeleteFramebuffers(1, &m_iFb);
m_cTex.reset();
m_iFbAllocated = false;
m_vSize = Vector2D();
}
CFramebuffer::~CFramebuffer() {
release();
}
bool CFramebuffer::isAllocated() {
return m_iFbAllocated && m_cTex;
}
SP<CTexture> CFramebuffer::getTexture() {
return m_cTex;
}
GLuint CFramebuffer::getFBID() {
return m_iFbAllocated ? m_iFb : 0;
}
SP<CTexture> CFramebuffer::getStencilTex() {
return m_pStencilTex;
}
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