From 8890b59f09b084f4b6582f7d0a07e10760980d9f Mon Sep 17 00:00:00 2001
From: 0penBrain <48731257+0penBrain@users.noreply.github.com>
Date: Wed, 17 Nov 2021 12:42:00 +0100
Subject: [PATCH] [Gui] Render corner cross labels as pixel maps so they are
 scalable

---
 src/Gui/View3DInventorViewer.cpp | 57 ++++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 7 deletions(-)

diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index bedc3c6d22..cde72dc3cb 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -3268,10 +3268,48 @@ void View3DInventorViewer::setViewing(SbBool enable)
 
 //****************************************************************************
 
-// Bitmap representations of an "X", a "Y" and a "Z" for the axis cross.
-static GLubyte xbmp[] = { 0x11,0x11,0x0a,0x04,0x0a,0x11,0x11 };
-static GLubyte ybmp[] = { 0x04,0x04,0x04,0x04,0x0a,0x11,0x11 };
-static GLubyte zbmp[] = { 0x1f,0x10,0x08,0x04,0x02,0x01,0x1f };
+// Pixel map representations of an "X", a "Y" and a "Z" for the axis cross.
+#define O {0,255} // black pixel
+#define I {255,0} // transparent pixel
+
+static uchar xPM[9][7][2] = {
+    {I,I,I,I,I,I,I},
+    {I,O,I,I,I,O,I},
+    {I,O,I,I,I,O,I},
+    {I,I,O,I,O,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,O,I,O,I,I},
+    {I,O,I,I,I,O,I},
+    {I,O,I,I,I,O,I},
+    {I,I,I,I,I,I,I}
+};
+
+static uchar yPM[9][7][2] = {
+    {I,I,I,I,I,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,O,I,O,I,I},
+    {I,O,I,I,I,O,I},
+    {I,O,I,I,I,O,I},
+    {I,I,I,I,I,I,I}
+};
+
+static uchar zPM[9][7][2] = {
+    {I,I,I,I,I,I,I},
+    {I,O,O,O,O,O,I},
+    {I,O,I,I,I,I,I},
+    {I,I,O,I,I,I,I},
+    {I,I,I,O,I,I,I},
+    {I,I,I,I,O,I,I},
+    {I,I,I,I,I,O,I},
+    {I,O,O,O,O,O,I},
+    {I,I,I,I,I,I,I}
+};
+
+#undef O
+#undef I
 
 void View3DInventorViewer::drawAxisCross(void)
 {
@@ -3429,12 +3467,17 @@ void View3DInventorViewer::drawAxisCross(void)
     else
         glColor3fv(SbVec3f(0.0f, 0.0f, 0.0f).getValue());
 
+    //glEnable(GL_ALPHA_TEST);
+    //glAlphaFunc(GL_GREATER, 0.5);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glPixelZoom((float)axiscrossSize/10, (float)axiscrossSize/10);
     glRasterPos2d(xpos[0], xpos[1]);
-    glBitmap(8, 7, 0, 0, 0, 0, xbmp);
+    glDrawPixels(7, 9, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, xPM);
     glRasterPos2d(ypos[0], ypos[1]);
-    glBitmap(8, 7, 0, 0, 0, 0, ybmp);
+    glDrawPixels(7, 9, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, yPM);
     glRasterPos2d(zpos[0], zpos[1]);
-    glBitmap(8, 7, 0, 0, 0, 0, zbmp);
+    glDrawPixels(7, 9, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, zPM);
 
     glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
     glPopMatrix();