From 2ebfd0c7456eff7e9c03d379d1dfbc611dc26672 Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Fri, 24 Nov 2023 10:54:21 +0000
Subject: renderer: Move to a full Hyprland GL rendering pipeline (#3920)

Also updates wlroots
---
 src/render/Renderbuffer.cpp | 81 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/render/Renderbuffer.cpp

(limited to 'src/render/Renderbuffer.cpp')

diff --git a/src/render/Renderbuffer.cpp b/src/render/Renderbuffer.cpp
new file mode 100644
index 00000000..0643904b
--- /dev/null
+++ b/src/render/Renderbuffer.cpp
@@ -0,0 +1,81 @@
+#include "Renderbuffer.hpp"
+#include "OpenGL.hpp"
+#include "../Compositor.hpp"
+
+#include <dlfcn.h>
+
+CRenderbuffer::~CRenderbuffer() {
+    if (eglGetCurrentContext() != wlr_egl_get_context(g_pCompositor->m_sWLREGL))
+        eglMakeCurrent(wlr_egl_get_display(g_pCompositor->m_sWLREGL), EGL_NO_SURFACE, EGL_NO_SURFACE, wlr_egl_get_context(g_pCompositor->m_sWLREGL));
+
+    m_sFramebuffer.release();
+    glDeleteRenderbuffers(1, &m_iRBO);
+
+    g_pHyprOpenGL->m_sProc.eglDestroyImageKHR(wlr_egl_get_display(g_pCompositor->m_sWLREGL), m_iImage);
+}
+
+CRenderbuffer::CRenderbuffer(wlr_buffer* buffer, uint32_t format) : m_pWlrBuffer(buffer) {
+
+    // EVIL, but we can't include a hidden header because nixos is fucking special
+    static EGLImageKHR (*PWLREGLCREATEIMAGEFROMDMABUF)(wlr_egl*, wlr_dmabuf_attributes*, bool*);
+    static bool symbolFound = false;
+    if (!symbolFound) {
+        PWLREGLCREATEIMAGEFROMDMABUF = reinterpret_cast<EGLImageKHR (*)(wlr_egl*, wlr_dmabuf_attributes*, bool*)>(dlsym(RTLD_DEFAULT, "wlr_egl_create_image_from_dmabuf"));
+
+        symbolFound = true;
+
+        RASSERT(PWLREGLCREATEIMAGEFROMDMABUF, "wlr_egl_create_image_from_dmabuf was not found in wlroots!");
+
+        Debug::log(LOG, "CRenderbuffer: wlr_egl_create_image_from_dmabuf found at {:x}", (uintptr_t)PWLREGLCREATEIMAGEFROMDMABUF);
+    }
+    // end evil hack
+
+    struct wlr_dmabuf_attributes dmabuf = {0};
+    if (!wlr_buffer_get_dmabuf(buffer, &dmabuf))
+        throw std::runtime_error("wlr_buffer_get_dmabuf failed");
+
+    bool externalOnly;
+    m_iImage = PWLREGLCREATEIMAGEFROMDMABUF(g_pCompositor->m_sWLREGL, &dmabuf, &externalOnly);
+    if (m_iImage == EGL_NO_IMAGE_KHR)
+        throw std::runtime_error("wlr_egl_create_image_from_dmabuf failed");
+
+    glGenRenderbuffers(1, &m_iRBO);
+    glBindRenderbuffer(GL_RENDERBUFFER, m_iRBO);
+    g_pHyprOpenGL->m_sProc.glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, (GLeglImageOES)m_iImage);
+    glBindRenderbuffer(GL_RENDERBUFFER, 0);
+
+    glGenFramebuffers(1, &m_sFramebuffer.m_iFb);
+    m_sFramebuffer.m_vSize = {buffer->width, buffer->height};
+    m_sFramebuffer.bind();
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_iRBO);
+
+    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+        throw std::runtime_error("rbo: glCheckFramebufferStatus failed");
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+    hyprListener_destroyBuffer.initCallback(
+        &buffer->events.destroy, [](void* owner, void* data) { g_pHyprRenderer->onRenderbufferDestroy((CRenderbuffer*)owner); }, this, "CRenderbuffer");
+}
+
+void CRenderbuffer::bind() {
+    glBindRenderbuffer(GL_RENDERBUFFER, m_iRBO);
+    bindFB();
+}
+
+void CRenderbuffer::bindFB() {
+    m_sFramebuffer.bind();
+}
+
+void CRenderbuffer::unbind() {
+    glBindRenderbuffer(GL_RENDERBUFFER, 0);
+#ifndef GLES2
+    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+#else
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+#endif
+}
+
+CFramebuffer* CRenderbuffer::getFB() {
+    return &m_sFramebuffer;
+}
\ No newline at end of file
-- 
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