GP: implement Shadow FX (wip)

Initial implementation of effect to create a drop shadow of the strokes

1 files changed, 21 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_shader_fx_types.h b/source/blender/makesdna/DNA_shader_fx_types.h
index f3c9f06c8dc..62a1d705f3b 100644
--- a/source/blender/makesdna/DNA_shader_fx_types.h
+++ b/source/blender/makesdna/DNA_shader_fx_types.h
@@ -44,6 +44,7 @@ typedef enum ShaderFxType {
 	eShaderFxType_Wave      = 6,
 	eShaderFxType_Rim       = 7,
 	eShaderFxType_Colorize  = 8,
+	eShaderFxType_Shadow    = 9,
 	NUM_SHADER_FX_TYPES
 } ShaderFxType;
 
@@ -169,6 +170,26 @@ typedef enum RimShaderFxModes {
 	eShaderFxRimMode_Divide = 5,
 } RimShaderFxModes;
 
+typedef struct ShadowShaderFxData {
+	ShaderFxData shaderfx;
+	struct Object *object;
+	int offset[2];
+	int flag;                    /* flags */
+	float shadow_rgba[4];
+	float amplitude;
+	float period;
+	float phase;
+	int orientation;
+	float scale[2];
+	float rotation;
+	ShaderFxData_runtime runtime;
+} ShadowShaderFxData;
+
+typedef enum eShadowShaderFx_Flag {
+	FX_SHADOW_USE_OBJECT = (1 << 0),
+	FX_SHADOW_USE_WAVE   = (1 << 1),
+} eShadowShaderFx_Flag;
+
 typedef struct SwirlShaderFxData {
 	ShaderFxData shaderfx;
 	struct Object *object;