From cd1612376138878b7b5d7b7a7a8fa7c9b1633634 Mon Sep 17 00:00:00 2001
From: YimingWu <xp8110@outlook.com>
Date: Thu, 20 May 2021 23:35:53 +0800
Subject: GPencil: Adding length modifier.

Reviewed By: Antonio Vazquez (antoniov)

Differential Revision: https://developer.blender.org/D8264
---
 .../makesdna/DNA_gpencil_modifier_defaults.h       | 10 +++++++
 .../blender/makesdna/DNA_gpencil_modifier_types.h  | 34 ++++++++++++++++++++++
 source/blender/makesdna/intern/dna_defaults.c      |  2 ++
 3 files changed, 46 insertions(+)

(limited to 'source/blender/makesdna')

diff --git a/source/blender/makesdna/DNA_gpencil_modifier_defaults.h b/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
index b816a45426b..a4ab38f6022 100644
--- a/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
+++ b/source/blender/makesdna/DNA_gpencil_modifier_defaults.h
@@ -299,4 +299,14 @@
     .chaining_image_threshold = 0.001f, \
   }
 
+#define _DNA_DEFAULT_LengthGpencilModifierData \
+  { \
+    .start_fac = 0.1f,\
+    .end_fac = 0.1f,\
+    .overshoot_fac = 0.01f,\
+    .pass_index = 0,\
+    .material = NULL,\
+  }
+
+
 /* clang-format off */
diff --git a/source/blender/makesdna/DNA_gpencil_modifier_types.h b/source/blender/makesdna/DNA_gpencil_modifier_types.h
index c03b358dc8a..410212ce100 100644
--- a/source/blender/makesdna/DNA_gpencil_modifier_types.h
+++ b/source/blender/makesdna/DNA_gpencil_modifier_types.h
@@ -54,6 +54,7 @@ typedef enum GpencilModifierType {
   eGpencilModifierType_Multiply = 17,
   eGpencilModifierType_Texture = 18,
   eGpencilModifierType_Lineart = 19,
+  eGpencilModifierType_Length = 20,
   /* Keep last. */
   NUM_GREASEPENCIL_MODIFIER_TYPES,
 } GpencilModifierType;
@@ -484,6 +485,39 @@ typedef enum eLatticeGpencil_Flag {
   GP_LATTICE_INVERT_MATERIAL = (1 << 4),
 } eLatticeGpencil_Flag;
 
+typedef struct LengthGpencilModifierData {
+  GpencilModifierData modifier;
+  /** Material for filtering. */
+  struct Material *material;
+  /** Layer name. */
+  char layername[64];
+  /** Custom index for passes. */
+  int pass_index;
+  /** Flags. */
+  int flag;
+  /** Custom index for passes. */
+  int layer_pass;
+  /** Length. */
+  float start_fac, end_fac;
+  /** Overshoot trajectory factor. */
+  float overshoot_fac;
+  /** Modifier mode. */
+  int mode;
+  char _pad[4];
+} LengthGpencilModifierData;
+
+typedef enum eLengthGpencil_Flag {
+  GP_LENGTH_INVERT_LAYER = (1 << 0),
+  GP_LENGTH_INVERT_PASS = (1 << 1),
+  GP_LENGTH_INVERT_LAYERPASS = (1 << 2),
+  GP_LENGTH_INVERT_MATERIAL = (1 << 3),
+} eLengthGpencil_Flag;
+
+typedef enum eLengthGpencil_Type {
+  GP_LENGTH_RELATIVE = 0,
+  GP_LENGTH_ABSOLUTE = 1,
+} eLengthGpencil_Type;
+
 typedef struct MirrorGpencilModifierData {
   GpencilModifierData modifier;
   struct Object *object;
diff --git a/source/blender/makesdna/intern/dna_defaults.c b/source/blender/makesdna/intern/dna_defaults.c
index 95272fb7804..2d55ea05867 100644
--- a/source/blender/makesdna/intern/dna_defaults.c
+++ b/source/blender/makesdna/intern/dna_defaults.c
@@ -316,6 +316,7 @@ SDNA_DEFAULT_DECL_STRUCT(ThickGpencilModifierData);
 SDNA_DEFAULT_DECL_STRUCT(TimeGpencilModifierData);
 SDNA_DEFAULT_DECL_STRUCT(TintGpencilModifierData);
 SDNA_DEFAULT_DECL_STRUCT(LineartGpencilModifierData);
+SDNA_DEFAULT_DECL_STRUCT(LengthGpencilModifierData);
 
 #undef SDNA_DEFAULT_DECL_STRUCT
 
@@ -541,6 +542,7 @@ const void *DNA_default_table[SDNA_TYPE_MAX] = {
     SDNA_DEFAULT_DECL(TimeGpencilModifierData),
     SDNA_DEFAULT_DECL(TintGpencilModifierData),
     SDNA_DEFAULT_DECL(LineartGpencilModifierData),
+    SDNA_DEFAULT_DECL(LengthGpencilModifierData),
 };
 #undef SDNA_DEFAULT_DECL
 #undef SDNA_DEFAULT_DECL_EX
-- 
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