minetest/src/client/tile.h

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/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
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(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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
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#include "irrlichttypes.h"
#include "irr_v3d.h"
#include <ITexture.h>
#include <string>
#include <vector>
#include <SMaterial.h>
#include <memory>
#include "util/numeric.h"
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#include "config.h"
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#if ENABLE_GLES
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#include <IVideoDriver.h>
#endif
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class IGameDef;
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struct TileSpec;
struct TileDef;
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typedef std::vector<video::SColor> Palette;
/*
tile.{h,cpp}: Texture handling stuff.
*/
/*
Find out the full path of an image by trying different filename
extensions.
If failed, return "".
TODO: Should probably be moved out from here, because things needing
this function do not need anything else from this header
*/
std::string getImagePath(std::string path);
/*
Gets the path to a texture by first checking if the texture exists
in texture_path and if not, using the data path.
Checks all supported extensions by replacing the original extension.
If not found, returns "".
Utilizes a thread-safe cache.
*/
std::string getTexturePath(const std::string &filename);
void clearTextureNameCache();
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/*
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TextureSource creates and caches textures.
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*/
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class ISimpleTextureSource
{
public:
ISimpleTextureSource() = default;
virtual ~ISimpleTextureSource() = default;
virtual video::ITexture* getTexture(
const std::string &name, u32 *id = nullptr) = 0;
};
class ITextureSource : public ISimpleTextureSource
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{
public:
ITextureSource() = default;
virtual ~ITextureSource() = default;
virtual u32 getTextureId(const std::string &name)=0;
virtual std::string getTextureName(u32 id)=0;
virtual video::ITexture* getTexture(u32 id)=0;
virtual video::ITexture* getTexture(
const std::string &name, u32 *id = nullptr)=0;
virtual video::ITexture* getTextureForMesh(
const std::string &name, u32 *id = nullptr) = 0;
/*!
* Returns a palette from the given texture name.
* The pointer is valid until the texture source is
* destructed.
* Should be called from the main thread.
*/
virtual Palette* getPalette(const std::string &name) = 0;
virtual bool isKnownSourceImage(const std::string &name)=0;
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virtual video::ITexture* getNormalTexture(const std::string &name)=0;
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virtual video::SColor getTextureAverageColor(const std::string &name)=0;
virtual video::ITexture *getShaderFlagsTexture(bool normalmap_present)=0;
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};
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class IWritableTextureSource : public ITextureSource
{
public:
IWritableTextureSource() = default;
virtual ~IWritableTextureSource() = default;
virtual u32 getTextureId(const std::string &name)=0;
virtual std::string getTextureName(u32 id)=0;
virtual video::ITexture* getTexture(u32 id)=0;
virtual video::ITexture* getTexture(
const std::string &name, u32 *id = nullptr)=0;
virtual bool isKnownSourceImage(const std::string &name)=0;
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virtual void processQueue()=0;
virtual void insertSourceImage(const std::string &name, video::IImage *img)=0;
virtual void rebuildImagesAndTextures()=0;
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virtual video::ITexture* getNormalTexture(const std::string &name)=0;
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virtual video::SColor getTextureAverageColor(const std::string &name)=0;
virtual video::ITexture *getShaderFlagsTexture(bool normalmap_present)=0;
};
IWritableTextureSource *createTextureSource();
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#if ENABLE_GLES
bool hasNPotSupport();
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video::IImage * Align2Npot2(video::IImage * image, irr::video::IVideoDriver* driver);
#endif
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enum MaterialType{
TILE_MATERIAL_BASIC,
TILE_MATERIAL_ALPHA,
TILE_MATERIAL_LIQUID_TRANSPARENT,
TILE_MATERIAL_LIQUID_OPAQUE,
TILE_MATERIAL_WAVING_LEAVES,
TILE_MATERIAL_WAVING_PLANTS,
TILE_MATERIAL_OPAQUE,
TILE_MATERIAL_WAVING_LIQUID_BASIC,
TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT,
TILE_MATERIAL_WAVING_LIQUID_OPAQUE,
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};
// Material flags
// Should backface culling be enabled?
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#define MATERIAL_FLAG_BACKFACE_CULLING 0x01
// Should a crack be drawn?
#define MATERIAL_FLAG_CRACK 0x02
// Should the crack be drawn on transparent pixels (unset) or not (set)?
// Ignored if MATERIAL_FLAG_CRACK is not set.
#define MATERIAL_FLAG_CRACK_OVERLAY 0x04
#define MATERIAL_FLAG_ANIMATION 0x08
//#define MATERIAL_FLAG_HIGHLIGHTED 0x10
#define MATERIAL_FLAG_TILEABLE_HORIZONTAL 0x20
#define MATERIAL_FLAG_TILEABLE_VERTICAL 0x40
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/*
This fully defines the looks of a tile.
The SMaterial of a tile is constructed according to this.
*/
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struct FrameSpec
{
FrameSpec() = default;
u32 texture_id = 0;
video::ITexture *texture = nullptr;
video::ITexture *normal_texture = nullptr;
video::ITexture *flags_texture = nullptr;
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};
#define MAX_TILE_LAYERS 2
//! Defines a layer of a tile.
struct TileLayer
{
TileLayer() = default;
/*!
* Two layers are equal if they can be merged.
*/
bool operator==(const TileLayer &other) const
{
return
texture_id == other.texture_id &&
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material_type == other.material_type &&
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material_flags == other.material_flags &&
color == other.color &&
scale == other.scale;
}
/*!
* Two tiles are not equal if they must have different vertices.
*/
bool operator!=(const TileLayer &other) const
{
return !(*this == other);
}
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// Sets everything else except the texture in the material
void applyMaterialOptions(video::SMaterial &material) const
{
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switch (material_type) {
case TILE_MATERIAL_OPAQUE:
case TILE_MATERIAL_LIQUID_OPAQUE:
case TILE_MATERIAL_WAVING_LIQUID_OPAQUE:
material.MaterialType = video::EMT_SOLID;
break;
case TILE_MATERIAL_BASIC:
case TILE_MATERIAL_WAVING_LEAVES:
case TILE_MATERIAL_WAVING_PLANTS:
case TILE_MATERIAL_WAVING_LIQUID_BASIC:
material.MaterialTypeParam = 0.5;
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material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
break;
case TILE_MATERIAL_ALPHA:
case TILE_MATERIAL_LIQUID_TRANSPARENT:
case TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT:
material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
break;
default:
break;
}
material.BackfaceCulling = (material_flags & MATERIAL_FLAG_BACKFACE_CULLING) != 0;
if (!(material_flags & MATERIAL_FLAG_TILEABLE_HORIZONTAL)) {
material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
}
if (!(material_flags & MATERIAL_FLAG_TILEABLE_VERTICAL)) {
material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
}
}
void applyMaterialOptionsWithShaders(video::SMaterial &material) const
{
material.BackfaceCulling = (material_flags & MATERIAL_FLAG_BACKFACE_CULLING) != 0;
if (!(material_flags & MATERIAL_FLAG_TILEABLE_HORIZONTAL)) {
material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
material.TextureLayer[1].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
}
if (!(material_flags & MATERIAL_FLAG_TILEABLE_VERTICAL)) {
material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
material.TextureLayer[1].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
}
}
bool isTileable() const
{
return (material_flags & MATERIAL_FLAG_TILEABLE_HORIZONTAL)
&& (material_flags & MATERIAL_FLAG_TILEABLE_VERTICAL);
}
// Ordered for size, please do not reorder
video::ITexture *texture = nullptr;
video::ITexture *normal_texture = nullptr;
video::ITexture *flags_texture = nullptr;
u32 shader_id = 0;
u32 texture_id = 0;
u16 animation_frame_length_ms = 0;
u8 animation_frame_count = 1;
u8 material_type = TILE_MATERIAL_BASIC;
u8 material_flags =
//0 // <- DEBUG, Use the one below
MATERIAL_FLAG_BACKFACE_CULLING |
MATERIAL_FLAG_TILEABLE_HORIZONTAL|
MATERIAL_FLAG_TILEABLE_VERTICAL;
//! If true, the tile has its own color.
bool has_color = false;
std::shared_ptr<std::vector<FrameSpec>> frames = nullptr;
/*!
* The color of the tile, or if the tile does not own
* a color then the color of the node owning this tile.
*/
video::SColor color;
u8 scale;
};
/*!
* Defines a face of a node. May have up to two layers.
*/
struct TileSpec
{
TileSpec() = default;
/*!
* Returns true if this tile can be merged with the other tile.
*/
bool isTileable(const TileSpec &other) const {
for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
if (layers[layer] != other.layers[layer])
return false;
if (!layers[layer].isTileable())
return false;
}
return rotation == 0
&& rotation == other.rotation
&& emissive_light == other.emissive_light;
}
//! If true, the tile rotation is ignored.
bool world_aligned = false;
//! Tile rotation.
u8 rotation = 0;
//! This much light does the tile emit.
u8 emissive_light = 0;
//! The first is base texture, the second is overlay.
TileLayer layers[MAX_TILE_LAYERS];
};
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std::vector<std::string> getTextureDirs();