Wayfire-plugins-extra build fix (original source https://github.com/WayfireWM/wayfire-plugins-extra/commit/cf95ac721fb1909244d24ea5acaa5d04765696c7)

gistfile1.txt

diff --git a/src/mag.cpp b/src/mag.cpp
index 1ed4d73..774a9aa 100644
--- a/src/mag.cpp
+++ b/src/mag.cpp
@@ -34,17 +34,6 @@
 #include "wayfire/render-manager.hpp"
 #include "wayfire/opengl.hpp"
 #include <glm/gtc/matrix_transform.hpp>
-
-extern "C"
-{
-#define static
-#include <wlr/config.h>
-#include <wlr/render/gles2.h>
-#include <wlr/render/wlr_renderer.h>
-#include <wlr/types/wlr_matrix.h>
-#undef static
-}
-
 #include <wayfire/util/log.hpp>
 
 
@@ -171,19 +160,6 @@ class wayfire_magnifier : public wf::plugin_interface_t
 
     wf::effect_hook_t post_hook = [=] ()
     {
-        wlr_dmabuf_attributes dmabuf_attribs;
-
-        /* This plugin only works if this function succeeds. It will not
-         * work with the x11 backend but works with drm, for example. */
-        if (!wlr_output_export_dmabuf(output->handle, &dmabuf_attribs))
-        {
-            LOGE("Failed reading output contents");
-            deactivate();
-            active = false;
-
-            return;
-        }
-
         auto cursor_position = output->get_cursor_position();
 
         auto ortho = output->render->get_target_framebuffer()
@@ -220,6 +196,9 @@ class wayfire_magnifier : public wf::plugin_interface_t
         /* Compute zoom_box, forcing the zoom to stay on the output */
         gl_geometry zoom_box;
 
+        /* Y-invert */
+        y = 1.0 - y;
+
         zoom_box.x1 = x - level;
         zoom_box.y1 = y - level;
         zoom_box.x2 = x + level;
@@ -249,26 +228,24 @@ class wayfire_magnifier : public wf::plugin_interface_t
             zoom_box.y2  = 1.0;
         }
 
+        zoom_box.x1 *= width - 1;
+        zoom_box.x2 *= width - 1;
+        zoom_box.y1 *= height - 1;
+        zoom_box.y2 *= height - 1;
+
         /* Copy zoom_box part of the output to our own texture to be
          * read by the mag_view_t. */
-        auto wlr_texture = wlr_texture_from_dmabuf(
-            wf::get_core().renderer, &dmabuf_attribs);
-
-        wf::texture_t texture{wlr_texture};
 
         OpenGL::render_begin();
         mag_view->mag_tex.allocate(width, height);
         mag_view->mag_tex.geometry = og;
         mag_view->mag_tex.bind();
 
-        OpenGL::render_transformed_texture(texture, src_geometry, zoom_box,
-            transform * mag_view->mag_tex.get_orthographic_projection(),
-            glm::vec4(1.0),
-            OpenGL::TEXTURE_USE_TEX_GEOMETRY);
-        OpenGL::render_end();
-
-        wlr_texture_destroy(wlr_texture);
-        wlr_dmabuf_attributes_finish(&dmabuf_attribs);
+        GL_CALL(glBindFramebuffer(GL_READ_FRAMEBUFFER,
+            output->render->get_target_framebuffer().fb));
+        GL_CALL(glBlitFramebuffer(zoom_box.x1, zoom_box.y2, zoom_box.x2, zoom_box.y1,
+            0, 0, width, height,
+            GL_COLOR_BUFFER_BIT, GL_LINEAR));
 
         mag_view->damage();
     };