MeasureIt: replace deprecated bgl module

Part of T80730

measureit/__init__.py

@@ -11,8 +11,8 @@ bl_info = {
     "name": "MeasureIt",
     "author": "Antonio Vazquez (antonioya)",
     "location": "View3D > Sidebar > View Tab",
-    "version": (1, 8, 1),
-    "blender": (2, 80, 0),
+    "version": (1, 8, 2),
+    "blender": (3, 0, 0),
     "description": "Tools for measuring objects.",
     "doc_url": "{BLENDER_MANUAL_URL}/addons/3d_view/measureit.html",
     "category": "3D View"

measureit/measureit_geometry.py

@@ -17,7 +17,6 @@ from bpy_extras import view3d_utils, mesh_utils
 import bpy_extras.object_utils as object_utils
 from sys import exc_info
 # GPU
-import bgl
 import gpu
 from gpu_extras.batch import batch_for_shader
 
@@ -477,7 +476,7 @@ def draw_segments(context, myobj, op, region, rv3d):
                     # ------------------------------------
                     # Draw lines
                     # ------------------------------------
-                    bgl.glEnable(bgl.GL_BLEND)
+                    gpu.state.blend_set('ALPHA')
 
                     if ms.gltype == 1:  # Segment
                         draw_line(screen_point_ap1, screen_point_v11, rgba)
@@ -1175,7 +1174,7 @@ def draw_faces(context, myobj, region, rv3d):
 
             a_p2 = (a_p1[0] + normal[0] * ln, a_p1[1] + normal[1] * ln, a_p1[2] + normal[2] * ln)
             # line setup
-            bgl.glEnable(bgl.GL_BLEND)
+            gpu.state.blend_set('ALPHA')
             imm_set_line_width(th)
             # converting to screen coordinates
             txtpoint2d = get_2d_point(region, rv3d, a_p1)
@@ -1185,7 +1184,7 @@ def draw_faces(context, myobj, region, rv3d):
                 draw_text(myobj, txtpoint2d, str(f.index), rgba, fsize)
             # Draw Normal
             if scene.measureit_debug_normals is True:
-                bgl.glEnable(bgl.GL_BLEND)
+                gpu.state.blend_set('ALPHA')
                 draw_arrow(txtpoint2d, point2, rgba, 10, "99", "1")
 
                 if len(obverts) > 2 and scene.measureit_debug_normal_details is True:

measureit/measureit_main.py

@@ -11,7 +11,6 @@ import bpy
 import bmesh
 from bmesh import from_edit_mesh
 # noinspection PyUnresolvedReferences
-import bgl
 from bpy.types import PropertyGroup, Panel, Object, Operator, SpaceView3D
 from bpy.props import IntProperty, CollectionProperty, FloatVectorProperty, BoolProperty, StringProperty, \
                       FloatProperty, EnumProperty
@@ -1933,8 +1932,8 @@ def draw_main(context):
     else:
         objlist = context.view_layer.objects
 
-    # Enable GL drawing
-    bgl.glEnable(bgl.GL_BLEND)
+    # Enable drawing
+    gpu.state.blend_set('ALPHA')
     # ---------------------------------------
     # Generate all OpenGL calls for measures
     # ---------------------------------------
@@ -1964,9 +1963,9 @@ def draw_main(context):
                 draw_faces(context, myobj, region, rv3d)
 
     # -----------------------
-    # restore opengl defaults
+    # restore defaults
     # -----------------------
-    bgl.glDisable(bgl.GL_BLEND)
+    gpu.state.blend_set('NONE')
 
 
 # -------------------------------------------------------------

measureit/measureit_render.py

@@ -8,7 +8,6 @@
 # noinspection PyUnresolvedReferences
 import bpy
 import gpu
-import bgl
 # noinspection PyUnresolvedReferences
 import blf
 from os import path, remove
@@ -54,8 +53,8 @@ def render_main(self, context, animation=False):
         [0, 0, 0, 1]])
 
     with offscreen.bind():
-        bgl.glClearColor(0.0, 0.0, 0.0, 0.0)
-        bgl.glClear(bgl.GL_COLOR_BUFFER_BIT)
+        fb = gpu.state.active_framebuffer_get()
+        fb.clear(color=(0.0, 0.0, 0.0, 0.0))
         gpu.matrix.reset()
         gpu.matrix.load_matrix(view_matrix)
         gpu.matrix.load_projection_matrix(Matrix.Identity(4))
@@ -101,9 +100,8 @@ def render_main(self, context, animation=False):
             y2 = height - y1
             draw_rectangle((x1, y1), (x2, y2), rfcolor)
 
-        buffer = bgl.Buffer(bgl.GL_BYTE, width * height * 4)
-        bgl.glReadBuffer(bgl.GL_COLOR_ATTACHMENT0)
-        bgl.glReadPixels(0, 0, width, height, bgl.GL_RGBA, bgl.GL_UNSIGNED_BYTE, buffer)
+        buffer = fb.read_color(0, 0, width, height, 4, 0, 'UBYTE')
+        buffer.dimensions = width * height * 4
 
     offscreen.free()