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/**
* @file
* @brief PNG and texture loading functionality
**/
#ifndef TILETEX_H
#define TILETEX_H
enum MipMapOptions
{
MIPMAP_CREATE,
MIPMAP_NONE,
MIPMAP_MAX,
};
// Arbitrary post-load texture processing
typedef bool(*tex_proc_func)(unsigned char *pixels, unsigned int w,
unsigned int h);
class GenericTexture
{
public:
GenericTexture();
virtual ~GenericTexture();
bool load_texture(const char *filename, MipMapOptions mip_opt,
tex_proc_func proc = NULL,
bool force_power_of_two = true);
bool load_texture(unsigned char *pixels, unsigned int w, unsigned int h,
MipMapOptions mip_opt, int offsetx=-1, int offsety=-1);
void unload_texture();
unsigned int width() const { return m_width; }
unsigned int height() const { return m_height; }
void bind() const;
unsigned int orig_width() const { return m_orig_width; }
unsigned int orig_height() const { return m_orig_height; }
protected:
unsigned int m_handle;
unsigned int m_width;
unsigned int m_height;
unsigned int m_orig_width;
unsigned int m_orig_height;
};
class TilesTexture : public GenericTexture
{
public:
TilesTexture();
void set_info(int max, tile_info_func *info);
inline const tile_info &get_info(tileidx_t idx) const;
inline bool get_coords(tileidx_t idx, int ofs_x, int ofs_y,
float &pos_sx, float &pos_sy,
float &pos_ex, float &pos_ey,
float &tex_sx, float &tex_sy,
float &tex_ex, float &tex_ey,
bool centre = true, int ymin = -1, int ymax = -1,
float tile_x = TILE_X, float tile_y = TILE_Y) const;
protected:
int m_tile_max;
tile_info_func *m_info_func;
};
inline const tile_info &TilesTexture::get_info(tileidx_t idx) const
{
ASSERT(m_info_func);
return m_info_func(idx);
}
inline bool TilesTexture::get_coords(tileidx_t idx, int ofs_x, int ofs_y,
float &pos_sx, float &pos_sy,
float &pos_ex, float &pos_ey,
float &tex_sx, float &tex_sy,
float &tex_ex, float &tex_ey,
bool centre, int ymin, int ymax,
float tile_x, float tile_y) const
{
const tile_info &inf = get_info(idx);
float fwidth = m_width;
float fheight = m_height;
// Centre tiles on x, but allow taller tiles to extend upwards.
int size_ox = centre ? TILE_X / 2 - inf.width / 2 : 0;
int size_oy = centre ? TILE_Y - inf.height : 0;
int pos_sy_adjust = ofs_y + inf.offset_y + size_oy;
int pos_ey_adjust = pos_sy_adjust + inf.ey - inf.sy;
int sy = pos_sy_adjust;
if (ymin >= 0)
sy = max(ymin, sy);
int ey = pos_ey_adjust;
if (ymax >= 0)
ey = min(ymax, ey);
// Nothing to draw.
if (sy >= ey)
return false;
pos_sx += (ofs_x + inf.offset_x + size_ox) / tile_x;
pos_sy += sy / tile_y;
pos_ex = pos_sx + (inf.ex - inf.sx) / tile_x;
pos_ey = pos_sy + (ey - sy) / tile_y;
tex_sx = inf.sx / fwidth;
tex_sy = (inf.sy + sy - pos_sy_adjust) / fheight;
tex_ex = inf.ex / fwidth;
tex_ey = (inf.ey + ey - pos_ey_adjust) / fheight;
return true;
}
class ImageManager
{
public:
ImageManager();
virtual ~ImageManager();
bool load_textures(bool need_mips);
void unload_textures();
FixedVector<TilesTexture, TEX_MAX> m_textures;
};
#endif
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