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quakespasm/Quake/glquake.h
Eric Wasylishen 0a681bd7cd new r_scale cvar, for rendering the 3D view at 1/2, 1/3, or 1/4 res. 
This is for emulating a low-resolution pixellated look,
or possibly as a performance boost on slow graphics cards.

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@1406 af15c1b1-3010-417e-b628-4374ebc0bcbd
2017-05-26 20:37:48 +00:00

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/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2007-2008 Kristian Duske
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 __GLQUAKE_H
#define __GLQUAKE_H
void GL_BeginRendering (int *x, int *y, int *width, int *height);
void GL_EndRendering (void);
void GL_Set2D (void);
extern int glx, gly, glwidth, glheight;
#define GL_UNUSED_TEXTURE (~(GLuint)0)
// r_local.h -- private refresh defs
#define ALIAS_BASE_SIZE_RATIO (1.0 / 11.0)
// normalizing factor so player model works out to about
// 1 pixel per triangle
#define MAX_LBM_HEIGHT 480
#define TILE_SIZE 128 // size of textures generated by R_GenTiledSurf
#define SKYSHIFT 7
#define SKYSIZE (1 << SKYSHIFT)
#define SKYMASK (SKYSIZE - 1)
#define BACKFACE_EPSILON 0.01
void R_TimeRefresh_f (void);
void R_ReadPointFile_f (void);
texture_t *R_TextureAnimation (texture_t *base, int frame);
typedef struct surfcache_s
{
struct surfcache_s *next;
struct surfcache_s **owner; // NULL is an empty chunk of memory
int lightadj[MAXLIGHTMAPS]; // checked for strobe flush
int dlight;
int size; // including header
unsigned width;
unsigned height; // DEBUG only needed for debug
float mipscale;
struct texture_s *texture; // checked for animating textures
byte data[4]; // width*height elements
} surfcache_t;
typedef struct
{
pixel_t *surfdat; // destination for generated surface
int rowbytes; // destination logical width in bytes
msurface_t *surf; // description for surface to generate
fixed8_t lightadj[MAXLIGHTMAPS];
// adjust for lightmap levels for dynamic lighting
texture_t *texture; // corrected for animating textures
int surfmip; // mipmapped ratio of surface texels / world pixels
int surfwidth; // in mipmapped texels
int surfheight; // in mipmapped texels
} drawsurf_t;
typedef enum {
pt_static, pt_grav, pt_slowgrav, pt_fire, pt_explode, pt_explode2, pt_blob, pt_blob2
} ptype_t;
// !!! if this is changed, it must be changed in d_ifacea.h too !!!
typedef struct particle_s
{
// driver-usable fields
vec3_t org;
float color;
// drivers never touch the following fields
struct particle_s *next;
vec3_t vel;
float ramp;
float die;
ptype_t type;
} particle_t;
//====================================================
extern qboolean r_cache_thrash; // compatability
extern vec3_t modelorg, r_entorigin;
extern entity_t *currententity;
extern int r_visframecount; // ??? what difs?
extern int r_framecount;
extern mplane_t frustum[4];
//
// view origin
//
extern vec3_t vup;
extern vec3_t vpn;
extern vec3_t vright;
extern vec3_t r_origin;
//
// screen size info
//
extern refdef_t r_refdef;
extern mleaf_t *r_viewleaf, *r_oldviewleaf;
extern int d_lightstylevalue[256]; // 8.8 fraction of base light value
extern cvar_t r_norefresh;
extern cvar_t r_drawentities;
extern cvar_t r_drawworld;
extern cvar_t r_drawviewmodel;
extern cvar_t r_speeds;
extern cvar_t r_pos;
extern cvar_t r_waterwarp;
extern cvar_t r_fullbright;
extern cvar_t r_lightmap;
extern cvar_t r_shadows;
extern cvar_t r_wateralpha;
extern cvar_t r_lavaalpha;
extern cvar_t r_telealpha;
extern cvar_t r_slimealpha;
extern cvar_t r_dynamic;
extern cvar_t r_novis;
extern cvar_t r_scale;
extern cvar_t gl_clear;
extern cvar_t gl_cull;
extern cvar_t gl_smoothmodels;
extern cvar_t gl_affinemodels;
extern cvar_t gl_polyblend;
extern cvar_t gl_flashblend;
extern cvar_t gl_nocolors;
extern cvar_t gl_playermip;
extern cvar_t gl_subdivide_size;
extern float load_subdivide_size; //johnfitz -- remember what subdivide_size value was when this map was loaded
extern int gl_stencilbits;
// Multitexture
extern qboolean mtexenabled;
extern qboolean gl_mtexable;
extern PFNGLMULTITEXCOORD2FARBPROC GL_MTexCoord2fFunc;
extern PFNGLACTIVETEXTUREARBPROC GL_SelectTextureFunc;
extern PFNGLCLIENTACTIVETEXTUREARBPROC GL_ClientActiveTextureFunc;
extern GLint gl_max_texture_units; //ericw
//johnfitz -- anisotropic filtering
#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
extern float gl_max_anisotropy;
extern qboolean gl_anisotropy_able;
//ericw -- VBO
extern PFNGLBINDBUFFERARBPROC GL_BindBufferFunc;
extern PFNGLBUFFERDATAARBPROC GL_BufferDataFunc;
extern PFNGLBUFFERSUBDATAARBPROC GL_BufferSubDataFunc;
extern PFNGLDELETEBUFFERSARBPROC GL_DeleteBuffersFunc;
extern PFNGLGENBUFFERSARBPROC GL_GenBuffersFunc;
extern qboolean gl_vbo_able;
//ericw
//ericw -- GLSL
// SDL 1.2 has a bug where it doesn't provide these typedefs on OS X!
typedef GLuint (APIENTRYP QS_PFNGLCREATESHADERPROC) (GLenum type);
typedef void (APIENTRYP QS_PFNGLDELETESHADERPROC) (GLuint shader);
typedef void (APIENTRYP QS_PFNGLDELETEPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP QS_PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
typedef void (APIENTRYP QS_PFNGLCOMPILESHADERPROC) (GLuint shader);
typedef void (APIENTRYP QS_PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
typedef void (APIENTRYP QS_PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef void (APIENTRYP QS_PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
typedef void (APIENTRYP QS_PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef GLuint (APIENTRYP QS_PFNGLCREATEPROGRAMPROC) (void);
typedef void (APIENTRYP QS_PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
typedef void (APIENTRYP QS_PFNGLLINKPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP QS_PFNGLBINDATTRIBLOCATIONFUNC) (GLuint program, GLuint index, const GLchar *name);
typedef void (APIENTRYP QS_PFNGLUSEPROGRAMPROC) (GLuint program);
typedef GLint (APIENTRYP QS_PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP QS_PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
typedef void (APIENTRYP QS_PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef void (APIENTRYP QS_PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef GLint (APIENTRYP QS_PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP QS_PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
typedef void (APIENTRYP QS_PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
typedef void (APIENTRYP QS_PFNGLUNIFORM3FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
typedef void (APIENTRYP QS_PFNGLUNIFORM4FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
extern QS_PFNGLCREATESHADERPROC GL_CreateShaderFunc;
extern QS_PFNGLDELETESHADERPROC GL_DeleteShaderFunc;
extern QS_PFNGLDELETEPROGRAMPROC GL_DeleteProgramFunc;
extern QS_PFNGLSHADERSOURCEPROC GL_ShaderSourceFunc;
extern QS_PFNGLCOMPILESHADERPROC GL_CompileShaderFunc;
extern QS_PFNGLGETSHADERIVPROC GL_GetShaderivFunc;
extern QS_PFNGLGETSHADERINFOLOGPROC GL_GetShaderInfoLogFunc;
extern QS_PFNGLGETPROGRAMIVPROC GL_GetProgramivFunc;
extern QS_PFNGLGETPROGRAMINFOLOGPROC GL_GetProgramInfoLogFunc;
extern QS_PFNGLCREATEPROGRAMPROC GL_CreateProgramFunc;
extern QS_PFNGLATTACHSHADERPROC GL_AttachShaderFunc;
extern QS_PFNGLLINKPROGRAMPROC GL_LinkProgramFunc;
extern QS_PFNGLBINDATTRIBLOCATIONFUNC GL_BindAttribLocationFunc;
extern QS_PFNGLUSEPROGRAMPROC GL_UseProgramFunc;
extern QS_PFNGLGETATTRIBLOCATIONPROC GL_GetAttribLocationFunc;
extern QS_PFNGLVERTEXATTRIBPOINTERPROC GL_VertexAttribPointerFunc;
extern QS_PFNGLENABLEVERTEXATTRIBARRAYPROC GL_EnableVertexAttribArrayFunc;
extern QS_PFNGLDISABLEVERTEXATTRIBARRAYPROC GL_DisableVertexAttribArrayFunc;
extern QS_PFNGLGETUNIFORMLOCATIONPROC GL_GetUniformLocationFunc;
extern QS_PFNGLUNIFORM1IPROC GL_Uniform1iFunc;
extern QS_PFNGLUNIFORM1FPROC GL_Uniform1fFunc;
extern QS_PFNGLUNIFORM3FPROC GL_Uniform3fFunc;
extern QS_PFNGLUNIFORM4FPROC GL_Uniform4fFunc;
extern qboolean gl_glsl_able;
extern qboolean gl_glsl_gamma_able;
extern qboolean gl_glsl_alias_able;
// ericw --
//ericw -- NPOT texture support
extern qboolean gl_texture_NPOT;
//johnfitz -- polygon offset
#define OFFSET_BMODEL 1
#define OFFSET_NONE 0
#define OFFSET_DECAL -1
#define OFFSET_FOG -2
#define OFFSET_SHOWTRIS -3
void GL_PolygonOffset (int);
//johnfitz -- GL_EXT_texture_env_combine
//the values for GL_ARB_ are identical
#define GL_COMBINE_EXT 0x8570
#define GL_COMBINE_RGB_EXT 0x8571
#define GL_COMBINE_ALPHA_EXT 0x8572
#define GL_RGB_SCALE_EXT 0x8573
#define GL_CONSTANT_EXT 0x8576
#define GL_PRIMARY_COLOR_EXT 0x8577
#define GL_PREVIOUS_EXT 0x8578
#define GL_SOURCE0_RGB_EXT 0x8580
#define GL_SOURCE1_RGB_EXT 0x8581
#define GL_SOURCE0_ALPHA_EXT 0x8588
#define GL_SOURCE1_ALPHA_EXT 0x8589
extern qboolean gl_texture_env_combine;
extern qboolean gl_texture_env_add; // for GL_EXT_texture_env_add
//johnfitz -- rendering statistics
extern int rs_brushpolys, rs_aliaspolys, rs_skypolys, rs_particles, rs_fogpolys;
extern int rs_dynamiclightmaps, rs_brushpasses, rs_aliaspasses, rs_skypasses;
extern float rs_megatexels;
//johnfitz -- track developer statistics that vary every frame
extern cvar_t devstats;
typedef struct {
int packetsize;
int edicts;
int visedicts;
int efrags;
int tempents;
int beams;
int dlights;
} devstats_t;
extern devstats_t dev_stats, dev_peakstats;
//ohnfitz -- reduce overflow warning spam
typedef struct {
double packetsize;
double efrags;
double beams;
double varstring;
} overflowtimes_t;
extern overflowtimes_t dev_overflows; //this stores the last time overflow messages were displayed, not the last time overflows occured
#define CONSOLE_RESPAM_TIME 3 // seconds between repeated warning messages
//johnfitz -- moved here from r_brush.c
extern int gl_lightmap_format, lightmap_bytes;
#define MAX_LIGHTMAPS 512 //johnfitz -- was 64
extern gltexture_t *lightmap_textures[MAX_LIGHTMAPS]; //johnfitz -- changed to an array
extern int gl_warpimagesize; //johnfitz -- for water warp
extern qboolean r_drawflat_cheatsafe, r_fullbright_cheatsafe, r_lightmap_cheatsafe, r_drawworld_cheatsafe; //johnfitz
typedef struct glsl_attrib_binding_s {
const char *name;
GLuint attrib;
} glsl_attrib_binding_t;
extern float map_wateralpha, map_lavaalpha, map_telealpha, map_slimealpha; //ericw
//johnfitz -- fog functions called from outside gl_fog.c
void Fog_ParseServerMessage (void);
float *Fog_GetColor (void);
float Fog_GetDensity (void);
void Fog_EnableGFog (void);
void Fog_DisableGFog (void);
void Fog_StartAdditive (void);
void Fog_StopAdditive (void);
void Fog_SetupFrame (void);
void Fog_NewMap (void);
void Fog_Init (void);
void Fog_SetupState (void);
void R_NewGame (void);
void R_AnimateLight (void);
void R_MarkSurfaces (void);
void R_CullSurfaces (void);
qboolean R_CullBox (vec3_t emins, vec3_t emaxs);
void R_StoreEfrags (efrag_t **ppefrag);
qboolean R_CullModelForEntity (entity_t *e);
void R_RotateForEntity (vec3_t origin, vec3_t angles);
void R_MarkLights (dlight_t *light, int num, mnode_t *node);
void R_InitParticles (void);
void R_DrawParticles (void);
void CL_RunParticles (void);
void R_ClearParticles (void);
void R_TranslatePlayerSkin (int playernum);
void R_TranslateNewPlayerSkin (int playernum); //johnfitz -- this handles cases when the actual texture changes
void R_UpdateWarpTextures (void);
void R_DrawWorld (void);
void R_DrawAliasModel (entity_t *e);
void R_DrawBrushModel (entity_t *e);
void R_DrawSpriteModel (entity_t *e);
void R_DrawTextureChains_Water (qmodel_t *model, entity_t *ent, texchain_t chain);
void R_RenderDlights (void);
void GL_BuildLightmaps (void);
void GL_DeleteBModelVertexBuffer (void);
void GL_BuildBModelVertexBuffer (void);
void GLMesh_LoadVertexBuffers (void);
void GLMesh_DeleteVertexBuffers (void);
void R_RebuildAllLightmaps (void);
int R_LightPoint (vec3_t p);
void GL_SubdivideSurface (msurface_t *fa);
void R_BuildLightMap (msurface_t *surf, byte *dest, int stride);
void R_RenderDynamicLightmaps (msurface_t *fa);
void R_UploadLightmaps (void);
void R_DrawWorld_ShowTris (void);
void R_DrawBrushModel_ShowTris (entity_t *e);
void R_DrawAliasModel_ShowTris (entity_t *e);
void R_DrawParticles_ShowTris (void);
GLint GL_GetUniformLocation (GLuint *programPtr, const char *name);
GLuint GL_CreateProgram (const GLchar *vertSource, const GLchar *fragSource, int numbindings, const glsl_attrib_binding_t *bindings);
void R_DeleteShaders (void);
void GLAlias_CreateShaders (void);
void GL_DrawAliasShadow (entity_t *e);
void DrawGLTriangleFan (glpoly_t *p);
void DrawGLPoly (glpoly_t *p);
void DrawWaterPoly (glpoly_t *p);
void GL_MakeAliasModelDisplayLists (qmodel_t *m, aliashdr_t *hdr);
void Sky_Init (void);
void Sky_DrawSky (void);
void Sky_NewMap (void);
void Sky_LoadTexture (texture_t *mt);
void Sky_LoadSkyBox (const char *name);
void TexMgr_RecalcWarpImageSize (void);
void R_ClearTextureChains (qmodel_t *mod, texchain_t chain);
void R_ChainSurface (msurface_t *surf, texchain_t chain);
void R_DrawTextureChains (qmodel_t *model, entity_t *ent, texchain_t chain);
void R_DrawWorld_Water (void);
void GL_BindBuffer (GLenum target, GLuint buffer);
void GL_ClearBufferBindings ();
void GLSLGamma_DeleteTexture (void);
void GLSLGamma_GammaCorrect (void);
void R_ScaleView_DeleteTexture (void);
float GL_WaterAlphaForSurface (msurface_t *fa);
#endif /* __GLQUAKE_H */
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