From 591e83b52e4ef43180bf44ca1a9ee5380e8b817a Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Thu, 22 Feb 2024 10:38:15 +0100
Subject: [PATCH] libvgcode - replacement of glMapBuffer() call for OpenGL ES

---
 src/libvgcode/include/Types.hpp               |  2 ++
 src/libvgcode/src/ViewerImpl.cpp              | 17 ++++++++++++++++-
 src/slic3r/GUI/LibVGCode/LibVGCodeWrapper.hpp |  7 +++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/libvgcode/include/Types.hpp b/src/libvgcode/include/Types.hpp
index e99d42635b..0ffe14373e 100644
--- a/src/libvgcode/include/Types.hpp
+++ b/src/libvgcode/include/Types.hpp
@@ -5,6 +5,8 @@
 #ifndef VGCODE_TYPES_HPP
 #define VGCODE_TYPES_HPP
 
+#define VGCODE_ENABLE_OPENGL_ES 0
+
 #define VGCODE_ENABLE_COG_AND_TOOL_MARKERS 0
 
 #include <array>
diff --git a/src/libvgcode/src/ViewerImpl.cpp b/src/libvgcode/src/ViewerImpl.cpp
index fb3ea43bca..4229ef22db 100644
--- a/src/libvgcode/src/ViewerImpl.cpp
+++ b/src/libvgcode/src/ViewerImpl.cpp
@@ -597,7 +597,7 @@ void ViewerImpl::load(GCodeInputData&& gcode_data)
         // create and fill height, width and angles buffer
         glsafe(glGenBuffers(1, &m_heights_widths_angles_buf_id));
         glsafe(glBindBuffer(GL_TEXTURE_BUFFER, m_heights_widths_angles_buf_id));
-        glsafe(glBufferData(GL_TEXTURE_BUFFER, heights_widths_angles.size() * sizeof(Vec3), heights_widths_angles.data(), GL_STATIC_DRAW));
+        glsafe(glBufferData(GL_TEXTURE_BUFFER, heights_widths_angles.size() * sizeof(Vec3), heights_widths_angles.data(), GL_DYNAMIC_DRAW));
         glsafe(glGenTextures(1, &m_heights_widths_angles_tex_id));
         glsafe(glBindTexture(GL_TEXTURE_BUFFER, m_heights_widths_angles_tex_id));
 
@@ -1310,6 +1310,20 @@ void ViewerImpl::update_heights_widths()
         return;
 
     glsafe(glBindBuffer(GL_TEXTURE_BUFFER, m_heights_widths_angles_buf_id));
+#if VGCODE_ENABLE_OPENGL_ES
+    for (size_t i = 0; i < m_vertices.size(); ++i) {
+        const PathVertex& v = m_vertices[i];
+        const size_t offset = i * sizeof(Vec3);
+        if (v.is_travel()) {
+            const std::array<float, 2> radii = { m_travels_radius, m_travels_radius };
+            glsafe(glBufferSubData(GL_TEXTURE_BUFFER, offset, radii.size() * sizeof(float), radii.data()));
+        }
+        else if (v.is_wipe()) {
+            const std::array<float, 2> radii = { m_wipes_radius, m_wipes_radius };
+            glsafe(glBufferSubData(GL_TEXTURE_BUFFER, offset, radii.size() * sizeof(float), radii.data()));
+        }
+    }
+#else
     Vec3* buffer = static_cast<Vec3*>(glMapBuffer(GL_TEXTURE_BUFFER, GL_WRITE_ONLY));
     glcheck();
 
@@ -1326,6 +1340,7 @@ void ViewerImpl::update_heights_widths()
     }
 
     glsafe(glUnmapBuffer(GL_TEXTURE_BUFFER));
+#endif // VGCODE_ENABLE_OPENGL_ES
     glsafe(glBindBuffer(GL_TEXTURE_BUFFER, 0));
 }
 
diff --git a/src/slic3r/GUI/LibVGCode/LibVGCodeWrapper.hpp b/src/slic3r/GUI/LibVGCode/LibVGCodeWrapper.hpp
index 4516fca8d1..2b11420357 100644
--- a/src/slic3r/GUI/LibVGCode/LibVGCodeWrapper.hpp
+++ b/src/slic3r/GUI/LibVGCode/LibVGCodeWrapper.hpp
@@ -14,6 +14,13 @@
 #include <libvgcode/include/GCodeInputData.hpp>
 #include <libvgcode/include/ColorRange.hpp>
 
+static_assert(VGCODE_ENABLE_OPENGL_ES == ENABLE_OPENGL_ES,
+#if ENABLE_OPENGL_ES
+    "VGCODE_ENABLE_OPENGL_ES must be set to 1");
+#else
+    "VGCODE_ENABLE_OPENGL_ES must be set to 0");
+#endif // ENABLE_OPENGL_ES
+
 namespace Slic3r {
 class Print;
 } // namespace Slic3r