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Quake/gl_texmgr.h

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+/*
+Copyright (C) 1996-2001 Id Software, Inc.
+Copyright (C) 2002-2009 John Fitzgibbons and others
+Copyright (C) 2010-2014 QuakeSpasm developers
+
+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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#ifndef _GL_TEXMAN_H
+#define _GL_TEXMAN_H
+
+//gl_texmgr.h -- fitzquake's texture manager. manages opengl texture images
+
+#define TEXPREF_NONE			0x0000
+#define TEXPREF_MIPMAP			0x0001	// generate mipmaps
+// TEXPREF_NEAREST and TEXPREF_LINEAR aren't supposed to be ORed with TEX_MIPMAP
+#define TEXPREF_LINEAR			0x0002	// force linear
+#define TEXPREF_NEAREST			0x0004	// force nearest
+#define TEXPREF_ALPHA			0x0008	// allow alpha
+#define TEXPREF_PAD			0x0010	// allow padding
+#define TEXPREF_PERSIST			0x0020	// never free
+#define TEXPREF_OVERWRITE		0x0040	// overwrite existing same-name texture
+#define TEXPREF_NOPICMIP		0x0080	// always load full-sized
+#define TEXPREF_FULLBRIGHT		0x0100	// use fullbright mask palette
+#define TEXPREF_NOBRIGHT		0x0200	// use nobright mask palette
+#define TEXPREF_CONCHARS		0x0400	// use conchars palette
+#define TEXPREF_WARPIMAGE		0x0800	// resize this texture when warpimagesize changes
+
+enum srcformat {SRC_INDEXED, SRC_LIGHTMAP, SRC_RGBA, SRC_INDEXED_PALETTE};
+
+typedef uintptr_t src_offset_t;
+
+typedef struct gltexture_s {
+//managed by texture manager
+	GLuint			texnum;
+	struct gltexture_s	*next;
+	qmodel_t		*owner;
+//managed by image loading
+	char			name[64];
+	unsigned int		width; //size of image as it exists in opengl
+	unsigned int		height; //size of image as it exists in opengl
+	unsigned int		flags;
+	char			source_file[MAX_QPATH]; //relative filepath to data source, or "" if source is in memory
+	src_offset_t		source_offset; //byte offset into file, or memory address
+	enum srcformat		source_format; //format of pixel data (indexed, lightmap, or rgba)
+	unsigned int		source_width; //size of image in source data
+	unsigned int		source_height; //size of image in source data
+	unsigned short		source_crc; //generated by source data before modifications
+	signed char			shirt; //0-13 shirt color, or -1 if never colormapped
+	signed char			pants; //0-13 pants color, or -1 if never colormapped
+//used for rendering
+	int			visframe; //matches r_framecount if texture was bound this frame
+} gltexture_t;
+
+extern gltexture_t *notexture;
+extern gltexture_t *nulltexture;
+
+extern unsigned int d_8to24table[256];
+extern unsigned int d_8to24table_fbright[256];
+extern unsigned int d_8to24table_nobright[256];
+extern unsigned int d_8to24table_conchars[256];
+
+// TEXTURE MANAGER
+
+float TexMgr_FrameUsage (void);
+gltexture_t *TexMgr_FindTexture (qmodel_t *owner, const char *name);
+gltexture_t *TexMgr_NewTexture (void);
+void TexMgr_FreeTexture (gltexture_t *kill);
+void TexMgr_FreeTextures (unsigned int flags, unsigned int mask);
+void TexMgr_FreeTexturesForOwner (qmodel_t *owner);
+void TexMgr_NewGame (void);
+void TexMgr_Init (void);
+void TexMgr_DeleteTextureObjects (void);
+
+// IMAGE LOADING
+gltexture_t *TexMgr_LoadImage (qmodel_t *owner, const char *name, int width, int height, enum srcformat format,
+			       byte *data, const char *source_file, src_offset_t source_offset, unsigned flags);
+void TexMgr_ReloadImage (gltexture_t *glt, int shirt, int pants);
+void TexMgr_ReloadImages (void);
+void TexMgr_ReloadNobrightImages (void);
+
+int TexMgr_Pad(int s);
+int TexMgr_SafeTextureSize (int s);
+int TexMgr_PadConditional (int s);
+
+// TEXTURE BINDING & TEXTURE UNIT SWITCHING
+
+void GL_SelectTexture (GLenum target);
+void GL_DisableMultitexture (void); //selects texture unit 0
+void GL_EnableMultitexture (void); //selects texture unit 1
+void GL_Bind (gltexture_t *texture);
+void GL_ClearBindings (void);
+
+#endif	/* _GL_TEXMAN_H */
+