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// * This file is part of the COLOBOT source code
// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
// *
// * 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 3 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, see http://www.gnu.org/licenses/.
// texture.h
#pragma once
namespace Gfx {
/**
\enum TexImgFormat
\brief Format of image data */
enum TexImgFormat
{
TEX_IMG_RGB,
TEX_IMG_BGR,
TEX_IMG_RGBA,
TEX_IMG_BGRA
};
/**
\enum TexMinFilter
\brief Minification texture filter
Corresponds to OpenGL modes but should translate to DirectX too. */
enum TexMinFilter
{
TEX_MIN_FILTER_NEAREST,
TEX_MIN_FILTER_LINEAR,
TEX_MIN_FILTER_NEAREST_MIPMAP_NEAREST,
TEX_MIN_FILTER_LINEAR_MIPMAP_NEAREST,
TEX_MIN_FILTER_NEAREST_MIPMAP_LINEAR,
TEX_MIN_FILTER_LINEAR_MIPMAP_LINEAR
};
/**
\enum TexMagFilter
\brief Magnification texture filter */
enum TexMagFilter
{
TEX_MAG_FILTER_NEAREST,
TEX_MAG_FILTER_LINEAR
};
/**
\enum TexWrapMode
\brief Wrapping mode for texture coords */
enum TexWrapMode
{
TEX_WRAP_CLAMP,
TEX_WRAP_REPEAT
};
/**
\enum TexMixOperation
\brief Multitexture mixing operation
*/
enum TexMixOperation
{
TEX_MIX_OPER_MODULATE,
TEX_MIX_OPER_ADD
};
/**
\enum TexMixArgument
\brief Multitexture mixing argument
*/
enum TexMixArgument
{
TEX_MIX_ARG_CURRENT,
TEX_MIX_ARG_TEXTURE,
TEX_MIX_ARG_DIFFUSE,
TEX_MIX_ARG_FACTOR
};
/**
\struct TextureCreateParams
\brief Parameters for texture creation
*/
struct TextureCreateParams
{
//! Whether to generate mipmaps
bool mipmap;
//! Format of source image data
Gfx::TexImgFormat format;
//! Minification filter
Gfx::TexMinFilter minFilter;
//! Magnification filter
Gfx::TexMagFilter magFilter;
//! Wrap S coord mode
Gfx::TexWrapMode wrapS;
//! Wrap T coord mode
Gfx::TexWrapMode wrapT;
//! Constructor; calls LoadDefault()
TextureCreateParams()
{ LoadDefault(); }
//! Loads the default values
inline void LoadDefault()
{
format = Gfx::TEX_IMG_RGB;
mipmap = false;
minFilter = Gfx::TEX_MIN_FILTER_NEAREST;
magFilter = Gfx::TEX_MAG_FILTER_NEAREST;
wrapS = Gfx::TEX_WRAP_REPEAT;
wrapT = Gfx::TEX_WRAP_REPEAT;
}
};
/**
\struct TextureParams
\brief Parameters for texture creation
*/
struct TextureParams
{
//! Mixing operation done on color values
Gfx::TexMixOperation colorOperation;
//! 1st argument of color operations
Gfx::TexMixArgument colorArg1;
//! 2nd argument of color operations
Gfx::TexMixArgument colorArg2;
//! Mixing operation done on alpha values
Gfx::TexMixOperation alphaOperation;
//! 1st argument of alpha operations
Gfx::TexMixArgument alphaArg1;
//! 2nd argument of alpha operations
Gfx::TexMixArgument alphaArg2;
//! Constructor; calls LoadDefault()
TextureParams()
{ LoadDefault(); }
//! Loads the default values
inline void LoadDefault()
{
colorOperation = Gfx::TEX_MIX_OPER_MODULATE;
colorArg1 = Gfx::TEX_MIX_ARG_CURRENT;
colorArg2 = Gfx::TEX_MIX_ARG_TEXTURE;
alphaOperation = Gfx::TEX_MIX_OPER_MODULATE;
alphaArg1 = Gfx::TEX_MIX_ARG_CURRENT;
alphaArg2 = Gfx::TEX_MIX_ARG_TEXTURE;
}
};
/** \struct Texture*/
struct Texture
{
//! Whether the texture was loaded
bool valid;
//! Id of the texture in graphics engine
unsigned int id;
//! Width of texture
int width;
//! Height of texture
int height;
//! Whether the texture has alpha channel
bool alpha;
Texture()
{
valid = false;
id = 0;
width = height = 0;
alpha = false;
}
//! Comparator for use in texture maps and sets
inline bool operator<(const Gfx::Texture &other) const
{
// Invalid textures are always "less than" every other texture
if ( (!valid) && (!other.valid) )
return false;
if (!valid)
return true;
if (!other.valid)
return false;
return id < other.id;
}
//! Comparator
inline bool operator==(const Gfx::Texture &other) const
{
if (valid != other.valid)
return false;
if ( (!valid) && (!other.valid) )
return true;
return id == other.id;
}
};
}; // namespace Gfx
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