gropengltexture.h

Go to the documentation of this file.

/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on the 
 * source.
 *
*/ 


#ifndef _GROPENGLTEXTURE_H
#define _GROPENGLTEXTURE_H

#include "globalincs/pstypes.h"
#include "graphics/gropengl.h"
#include "graphics/gropenglextension.h"


typedef struct tcache_slot_opengl {
        GLuint texture_id;
        GLenum texture_target;
        GLenum wrap_mode;
        float u_scale, v_scale;
        int     bitmap_handle;
        int     size;
        ushort w, h;
        ubyte bpp;
        ubyte mipmap_levels;

        tcache_slot_opengl() :
                texture_id(0), texture_target(GL_TEXTURE_2D), wrap_mode(GL_REPEAT),
                u_scale(1.0f), v_scale(1.0f), bitmap_handle(-1), size(0), w(0), h(0),
                bpp(0), mipmap_levels(0)
        {
        }

        void reset()
        {
                texture_id = 0;
                texture_target = GL_TEXTURE_2D;
                wrap_mode = GL_REPEAT;
                u_scale = 1.0f;
                v_scale = 1.0f;
                bitmap_handle = -1;
                size = 0;
                w = 0;
                h = 0;
                bpp = 0;
                mipmap_levels = 0;
        }
} tcache_slot_opengl;

extern int GL_min_texture_width;
extern GLint GL_max_texture_width;
extern int GL_min_texture_height;
extern GLint GL_max_texture_height;
extern GLint GL_supported_texture_units;
extern int GL_mipmap_filter;
extern GLenum GL_texture_target;
extern GLenum GL_texture_face;
extern GLfloat GL_anisotropy;
extern bool GL_rendering_to_texture;
extern GLint GL_max_renderbuffer_size;

void opengl_switch_arb(int unit, int state);
void opengl_tcache_init();
void opengl_free_texture_slot(int n);
void opengl_tcache_flush();
void opengl_tcache_shutdown();
void opengl_tcache_frame();
void opengl_set_additive_tex_env();
void opengl_set_modulate_tex_env();
void opengl_preload_init();
GLfloat opengl_get_max_anisotropy();
void opengl_kill_render_target(int slot);
int opengl_make_render_target(int handle, int slot, int *w, int *h, ubyte *bpp, int *mm_lvl, int flags);
int opengl_set_render_target(int slot, int face = -1, int is_static = 0);
void gr_opengl_get_bitmap_from_texture(void* data_out, int bitmap_num);
int opengl_get_texture(GLenum target, GLenum pixel_format, GLenum data_format, int num_mipmaps, int width, int height, int bytes_per_pixel, void* image_data, int offset);
size_t opengl_export_render_target( int slot, int width, int height, int alpha, int num_mipmaps, ubyte *image_data );
void opengl_set_texture_target(GLenum target = GL_TEXTURE_2D);
void opengl_set_texture_face(GLenum face = GL_TEXTURE_2D);

int gr_opengl_tcache_set(int bitmap_handle, int bitmap_type, float *u_scale, float *v_scale, int stage = 0);
int gr_opengl_preload(int bitmap_num, int is_aabitmap);
void gr_opengl_set_texture_panning(float u, float v, bool enable);
void gr_opengl_set_texture_addressing(int mode);
GLuint opengl_get_rtt_framebuffer();

#endif  //_GROPENGLTEXTURE_H