From 1982ded78663a7639bf541d08a699eeb7302b160 Mon Sep 17 00:00:00 2001
From: Ivan Mahonin <bh@icystar.com>
Date: May 01 2023 07:52:44 +0000
Subject: #assistants: tglGetBounds()


---

diff --git a/toonz/sources/common/tgl/tgl.cpp b/toonz/sources/common/tgl/tgl.cpp
index 88c6989..6c3c831 100644
--- a/toonz/sources/common/tgl/tgl.cpp
+++ b/toonz/sources/common/tgl/tgl.cpp
@@ -73,6 +73,16 @@ double tglGetPixelSize2() {
 
 //-----------------------------------------------------------------------------
 
+TRectD tglGetBounds() {
+  TAffine4 modelview;
+  TAffine4 projection;
+  glGetDoublev(GL_MODELVIEW_MATRIX, modelview.a);
+  glGetDoublev(GL_PROJECTION_MATRIX, projection.a);
+  return (projection*modelview).get2d().inv() * TRectD(-1.0, -1.0, 1.0, 1.0);
+}
+
+//-----------------------------------------------------------------------------
+
 double tglGetTextWidth(const std::string &s, void *font) {
   double factor = 0.07;
   double w      = 0;
diff --git a/toonz/sources/include/tgl.h b/toonz/sources/include/tgl.h
index b614cf2..134da8a 100644
--- a/toonz/sources/include/tgl.h
+++ b/toonz/sources/include/tgl.h
@@ -112,6 +112,9 @@ inline void tglColor(const TPixelD &p) { glColor4d(p.r, p.g, p.b, p.m); }
 //! retrieve the square of pixel size from current GL_MODELVIEW matrix
 DVAPI double tglGetPixelSize2();
 
+//! retrieve the current viewport bounds in world coordinates
+DVAPI TRectD tglGetBounds();
+
 //! Draw text in string s at position p.
 
 DVAPI void tglDrawText(const TPointD &p, const std::string &s,