/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software  Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2018, Blender Foundation
 * This is a new part of Blender
 *
 * Contributor(s): Antonio Vazquez
 *
 * ***** END GPL LICENSE BLOCK *****
 *
 */

/** \file blender/shader_fx/intern/FX_shader_shadow.c
 *  \ingroup shader_fx
 */

#include <stdio.h>

#include "DNA_scene_types.h"
#include "DNA_object_types.h"
#include "DNA_gpencil_types.h"

#include "BLI_math_base.h"
#include "BLI_utildefines.h"

#include "BKE_library_query.h"
#include "BKE_modifier.h"
#include "BKE_shader_fx.h"

#include "FX_shader_types.h"

#include "DEG_depsgraph.h"
#include "DEG_depsgraph_build.h"

static void initData(ShaderFxData *md)
{
	ShadowShaderFxData *gpfx = (ShadowShaderFxData *)md;
	gpfx->rotation = 0.0f;
	ARRAY_SET_ITEMS(gpfx->offset, 15, 20);
	ARRAY_SET_ITEMS(gpfx->scale, 1.0f, 1.0f);
	ARRAY_SET_ITEMS(gpfx->shadow_rgba, 0.54f, 0.62f, 1.0f, 0.9f);

	gpfx->amplitude = 10.0f;
	gpfx->period = 20.0f;
	gpfx->phase = 0.0f;
	gpfx->orientation = 1;

	ARRAY_SET_ITEMS(gpfx->blur, 5, 5);
	gpfx->samples = 2;
}

static void copyData(const ShaderFxData *md, ShaderFxData *target)
{
	BKE_shaderfx_copyData_generic(md, target);
}

static void updateDepsgraph(ShaderFxData *fx, const ModifierUpdateDepsgraphContext *ctx)
{
	ShadowShaderFxData *fxd = (ShadowShaderFxData *)fx;
	if (fxd->object != NULL) {
		DEG_add_object_relation(ctx->node, fxd->object, DEG_OB_COMP_GEOMETRY, "Shadow ShaderFx");
		DEG_add_object_relation(ctx->node, fxd->object, DEG_OB_COMP_TRANSFORM, "Shadow ShaderFx");
	}
	DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Shadow ShaderFx");
}

static bool isDisabled(ShaderFxData *fx, int UNUSED(userRenderParams))
{
	ShadowShaderFxData *fxd = (ShadowShaderFxData *)fx;

	return (!fxd->object) && (fxd->flag & FX_SHADOW_USE_OBJECT);
}

static void foreachObjectLink(
	ShaderFxData *fx, Object *ob,
	ShaderFxObjectWalkFunc walk, void *userData)
{
	ShadowShaderFxData *fxd = (ShadowShaderFxData *)fx;

	walk(userData, ob, &fxd->object, IDWALK_CB_NOP);
}

ShaderFxTypeInfo shaderfx_Type_Shadow = {
	/* name */              "Shadow",
	/* structName */        "ShadowShaderFxData",
	/* structSize */        sizeof(ShadowShaderFxData),
	/* type */              eShaderFxType_GpencilType,
	/* flags */             0,

	/* copyData */          copyData,

	/* initData */          initData,
	/* freeData */          NULL,
	/* isDisabled */        isDisabled,
	/* updateDepsgraph */   updateDepsgraph,
	/* dependsOnTime */     NULL,
	/* foreachObjectLink */ foreachObjectLink,
	/* foreachIDLink */     NULL,
};
