GPencil: Refactor of Draw Engine, Vertex Paint and all internal functions

This commit is a full refactor of the grease pencil modules including Draw Engine, Modifiers, VFX, depsgraph update, improvements in operators and conversion of Sculpt and Weight paint tools to real brushes.

Also, a huge code cleanup has been done at all levels.

Thanks to @fclem for his work and yo @pepeland and @mendio for the testing and help in the development.

Differential Revision: https://developer.blender.org/D6293

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/draw/engines/overlay/shaders/edit_gpencil_guide_vert.glsl b/source/blender/draw/engines/overlay/shaders/edit_gpencil_guide_vert.glsl
new file mode 100644
index 00000000000..ef68b0f4e6f
--- /dev/null
+++ b/source/blender/draw/engines/overlay/shaders/edit_gpencil_guide_vert.glsl
@@ -0,0 +1,14 @@
+uniform vec4 pColor;
+uniform float pSize;
+uniform vec3 pPosition;
+
+out vec4 finalColor;
+
+void main()
+{
+  GPU_INTEL_VERTEX_SHADER_WORKAROUND
+
+  gl_Position = point_world_to_ndc(pPosition);
+  finalColor = pColor;
+  gl_PointSize = pSize;
+}