594 lines
13 KiB
C
594 lines
13 KiB
C
//=======================================================================
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// Copyright XashXT Group 2007 ©
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// r_backend.c - open gl backend utilites
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//=======================================================================
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#include "gl_local.h"
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#define NUM_GL_MODES (sizeof(modes) / sizeof (glmode_t))
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#define NUM_GL_ALPHA_MODES (sizeof(gl_alpha_modes) / sizeof (gltmode_t))
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#define NUM_GL_SOLID_MODES (sizeof(gl_solid_modes) / sizeof (gltmode_t))
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//set initial values
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int gl_tex_solid_format = 3;
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int gl_tex_alpha_format = 4;
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int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
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int gl_filter_max = GL_LINEAR;
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typedef struct
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{
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char *name;
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int minimize;
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int maximize;
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} glmode_t;
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glmode_t modes[] = {
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{"GL_NEAREST", GL_NEAREST, GL_NEAREST},
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{"GL_LINEAR", GL_LINEAR, GL_LINEAR},
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{"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
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{"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
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{"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
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{"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
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};
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typedef struct
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{
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char *name;
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int mode;
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}gltmode_t;
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gltmode_t gl_alpha_modes[] = {
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{"default", 4},
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{"GL_RGBA", GL_RGBA},
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{"GL_RGBA8", GL_RGBA8},
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{"GL_RGB5_A1", GL_RGB5_A1},
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{"GL_RGBA4", GL_RGBA4},
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{"GL_RGBA2", GL_RGBA2},
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};
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gltmode_t gl_solid_modes[] = {
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{"default", 3},
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{"GL_RGB", GL_RGB},
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{"GL_RGB8", GL_RGB8},
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{"GL_RGB5", GL_RGB5},
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{"GL_RGB4", GL_RGB4},
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{"GL_R3_G3_B2", GL_R3_G3_B2},
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};
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/*
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===============
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GL_Strings_f
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===============
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*/
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void GL_Strings_f( void )
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{
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ri.Con_Printf (PRINT_ALL, "GL_VENDOR: %s\n", gl_config.vendor_string );
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ri.Con_Printf (PRINT_ALL, "GL_RENDERER: %s\n", gl_config.renderer_string );
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ri.Con_Printf (PRINT_ALL, "GL_VERSION: %s\n", gl_config.version_string );
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ri.Con_Printf (PRINT_ALL, "GL_EXTENSIONS: %s\n", gl_config.extensions_string );
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}
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#define GLSTATE_DISABLE_ALPHATEST
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#define GLSTATE_ENABLE_ALPHATEST
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#define GLSTATE_DISABLE_BLEND
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#define GLSTATE_ENABLE_BLEND
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#define GLSTATE_DISABLE_TEXGEN
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#define GLSTATE_ENABLE_TEXGEN
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/*
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===============
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GL_ArraysState
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===============
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*/
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void GL_LockArrays( int count )
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{
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if (qglLockArraysEXT != 0)
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qglLockArraysEXT(0, count);
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}
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void GL_UnlockArrays( void )
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{
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if (qglUnlockArraysEXT != 0)
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qglUnlockArraysEXT();
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}
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/*
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===============
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GL_StateAlphaTest
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===============
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*/
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void GL_EnableAlphaTest ( void )
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{
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if (!gl_state.alpha_test)
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{
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qglEnable(GL_ALPHA_TEST);
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gl_state.alpha_test=true;
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}
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}
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void GL_DisableAlphaTest ( void )
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{
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if (gl_state.alpha_test)
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{
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qglDisable(GL_ALPHA_TEST);
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gl_state.alpha_test=false;
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}
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}
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/*
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===============
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GL_StateBlend
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===============
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*/
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void GL_EnableBlend( void )
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{
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if (!gl_state.blend)
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{
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qglEnable(GL_BLEND);
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gl_state.blend=true;
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}
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}
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void GL_DisableBlend( void )
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{
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if (gl_state.blend)
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{
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qglDisable(GL_BLEND);
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gl_state.blend=false;
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}
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}
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/*
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===============
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GL_StateTexGen
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===============
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*/
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void GL_EnableTexGen( void )
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{
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if (gl_state.texgen) return;
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qglEnable(GL_TEXTURE_GEN_S);
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qglEnable(GL_TEXTURE_GEN_T);
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qglEnable(GL_TEXTURE_GEN_R);
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qglEnable(GL_TEXTURE_GEN_Q);
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gl_state.texgen = true;
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}
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void GL_DisableTexGen( void )
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{
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if (!gl_state.texgen) return;
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qglDisable(GL_TEXTURE_GEN_S);
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qglDisable(GL_TEXTURE_GEN_T);
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qglDisable(GL_TEXTURE_GEN_R);
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qglDisable(GL_TEXTURE_GEN_Q);
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gl_state.texgen = false;
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}
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/*
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===============
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GL_TextureMode
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===============
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*/
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void GL_TextureMode( char *string )
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{
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int i;
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image_t *glt;
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for (i=0 ; i< NUM_GL_MODES ; i++)
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{
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if ( !strcasecmp( modes[i].name, string ) )
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break;
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}
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if (i == NUM_GL_MODES)
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{
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ri.Con_Printf (PRINT_ALL, "bad filter name\n");
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return;
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}
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gl_filter_min = modes[i].minimize;
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gl_filter_max = modes[i].maximize;
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// change all the existing mipmap texture objects
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for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
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{
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if (glt->type != it_pic && glt->type != it_sky )
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{
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GL_Bind (glt->texnum);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
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}
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}
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}
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/*
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===============
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GL_TextureAlphaMode
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===============
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*/
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void GL_TextureAlphaMode( char *string )
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{
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int i;
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for (i=0 ; i< NUM_GL_ALPHA_MODES ; i++)
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{
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if ( !strcasecmp( gl_alpha_modes[i].name, string ) )
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break;
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}
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if (i == NUM_GL_ALPHA_MODES)
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{
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ri.Con_Printf (PRINT_ALL, "bad alpha texture mode name\n");
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return;
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}
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gl_tex_alpha_format = gl_alpha_modes[i].mode;
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}
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/*
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===============
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GL_TextureSolidMode
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===============
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*/
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void GL_TextureSolidMode( char *string )
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{
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int i;
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for (i=0 ; i< NUM_GL_SOLID_MODES ; i++)
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{
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if ( !strcasecmp( gl_solid_modes[i].name, string ) )
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break;
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}
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if (i == NUM_GL_SOLID_MODES)
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{
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ri.Con_Printf (PRINT_ALL, "bad solid texture mode name\n");
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return;
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}
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gl_tex_solid_format = gl_solid_modes[i].mode;
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}
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/*
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===============
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GL_EnableMultitexture
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===============
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*/
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void GL_EnableMultitexture( bool enable )
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{
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if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
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return;
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if ( enable )
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{
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GL_SelectTexture( GL_TEXTURE1 );
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qglEnable( GL_TEXTURE_2D );
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GL_TexEnv( GL_REPLACE );
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}
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else
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{
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GL_SelectTexture( GL_TEXTURE1 );
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qglDisable( GL_TEXTURE_2D );
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GL_TexEnv( GL_REPLACE );
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}
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GL_SelectTexture( GL_TEXTURE0 );
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GL_TexEnv( GL_REPLACE );
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}
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/*
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===============
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GL_SelectTexture
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===============
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*/
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void GL_SelectTexture( GLenum texture )
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{
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int tmu;
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if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
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return;
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if ( texture == GL_TEXTURE0 )
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{
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tmu = 0;
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}
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else
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{
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tmu = 1;
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}
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if ( tmu == gl_state.currenttmu )
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{
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return;
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}
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gl_state.currenttmu = tmu;
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if ( qglSelectTextureSGIS )
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{
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qglSelectTextureSGIS( texture );
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}
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else if ( qglActiveTextureARB )
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{
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qglActiveTextureARB( texture );
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qglClientActiveTextureARB( texture );
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}
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}
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/*
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===============
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GL_TexEnv
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===============
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*/
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void GL_TexEnv( GLenum mode )
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{
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static int lastmodes[2] = { -1, -1 };
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if ( mode != lastmodes[gl_state.currenttmu] )
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{
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qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode );
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lastmodes[gl_state.currenttmu] = mode;
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}
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}
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/*
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===============
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GL_TexFilter
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===============
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*/
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void GL_TexFilter( GLboolean mipmap )
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{
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if (mipmap)
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{
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
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}
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else
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{
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
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}
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}
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/*
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===============
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GL_Bind
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===============
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*/
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void GL_Bind (int texnum)
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{
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extern image_t *draw_chars;
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if (gl_nobind->value && draw_chars) // performance evaluation option
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texnum = draw_chars->texnum;
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if ( gl_state.currenttextures[gl_state.currenttmu] == texnum)
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return;
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gl_state.currenttextures[gl_state.currenttmu] = texnum;
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qglBindTexture (GL_TEXTURE_2D, texnum);
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}
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/*
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===============
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GL_Bind
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===============
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*/
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void GL_MBind( GLenum target, int texnum )
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{
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GL_SelectTexture( target );
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if ( target == GL_TEXTURE0 )
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{
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if ( gl_state.currenttextures[0] == texnum )
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return;
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}
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else
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{
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if ( gl_state.currenttextures[1] == texnum )
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return;
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}
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GL_Bind( texnum );
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}
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/*
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===============
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GL_SetDefaultState
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===============
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*/
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void GL_SetDefaultState( void )
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{
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qglClearColor (1,0, 0.5 , 0.5);
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qglCullFace(GL_FRONT);
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qglEnable(GL_TEXTURE_2D);
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qglEnable(GL_ALPHA_TEST);
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qglAlphaFunc(GL_GREATER, 0.666);
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qglDisable (GL_DEPTH_TEST);
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qglDisable (GL_CULL_FACE);
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qglDisable (GL_BLEND);
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gl_state.blend=false;
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qglColor4f (1,1,1,1);
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qglHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
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qglHint (GL_FOG_HINT, GL_FASTEST);
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qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
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qglShadeModel (GL_FLAT);
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GL_TextureMode( gl_texturemode->string );
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GL_TextureAlphaMode( gl_texturealphamode->string );
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GL_TextureSolidMode( gl_texturesolidmode->string );
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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GL_TexEnv( GL_REPLACE );
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gl_state.texgen = false;
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qglDisable(GL_TEXTURE_GEN_S);
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qglDisable(GL_TEXTURE_GEN_T);
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if ( qglPointParameterfEXT )
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{
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float attenuations[3];
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attenuations[0] = gl_particle_att_a->value;
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attenuations[1] = gl_particle_att_b->value;
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attenuations[2] = gl_particle_att_c->value;
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qglEnable( GL_POINT_SMOOTH );
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qglPointParameterfEXT( GL_POINT_SIZE_MIN_EXT, gl_particle_min_size->value );
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qglPointParameterfEXT( GL_POINT_SIZE_MAX_EXT, gl_particle_max_size->value );
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qglPointParameterfvEXT( GL_DISTANCE_ATTENUATION_EXT, attenuations );
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}
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GL_UpdateSwapInterval();
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}
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/*
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===============
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GL_UpdateSwapInterval
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===============
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*/
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void GL_UpdateSwapInterval( void )
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{
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if ( gl_swapinterval->modified )
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{
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gl_swapinterval->modified = false;
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if ( !gl_state.stereo_enabled )
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{
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if ( qwglSwapIntervalEXT )
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qwglSwapIntervalEXT( gl_swapinterval->value );
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}
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}
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}
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void qglPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
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{
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GLdouble xmin, xmax, ymin, ymax;
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ymax = zNear * tan( fovy * M_PI / 360.0 );
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ymin = -ymax;
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xmin = ymin * aspect;
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xmax = ymax * aspect;
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xmin += -( 2 * gl_state.camera_separation ) / zNear;
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xmax += -( 2 * gl_state.camera_separation ) / zNear;
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qglFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
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}
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static int gamma_forcenextframe = false;
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static float cachegamma, cachebrightness, cachecontrast, cacheblack[3], cachegrey[3], cachewhite[3];
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static int cachecolorenable, cachehwgamma;
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bool vid_activewindow = true;
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bool vid_usinghwgamma = false;
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int vid_gammarampsize = 0;
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word *vid_gammaramps = NULL;
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word *vid_systemgammaramps = NULL;
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cvar_t *vid_hardwaregammasupported;
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cvar_t *v_hwgamma;
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cvar_t *v_gamma;
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void BuildGammaTable16(float prescale,float gamma,float scale,float base,unsigned short *out,int rampsize)
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{
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int i,adjusted;
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double invgamma;
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invgamma = 1.0 / gamma;
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prescale /= (double) (rampsize - 1);
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for (i = 0;i < rampsize;i++)
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{
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adjusted = (int) (65535.0 * (pow((double) i * prescale,invgamma) * scale + base) + 0.5);
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out[i] = bound(0,adjusted,65535);
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}
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}
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int VID_SetGamma(word *ramps, int rampsize)
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{
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HDC hdc = GetDC (NULL);
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int i = SetDeviceGammaRamp(hdc, ramps);
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ReleaseDC (NULL, hdc);
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return i; // return success or failure
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}
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int VID_GetGamma(word *ramps, int rampsize)
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{
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HDC hdc = GetDC (NULL);
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int i = GetDeviceGammaRamp(hdc, ramps);
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ReleaseDC (NULL, hdc);
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return i; // return success or failure
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}
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void VID_UpdateGamma(bool force, int rampsize)
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{
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float f;
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if (!force && !gamma_forcenextframe && cachehwgamma == (vid_activewindow ? v_hwgamma->value : 0) && v_gamma->value == cachegamma)
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return;
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f = bound(0.1, v_gamma->value, 2.5);
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if (v_gamma->value != f) ri.Cvar_SetValue("v_gamma", f);
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cachehwgamma = vid_activewindow ? v_hwgamma->value : 0;
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gamma_forcenextframe = false;
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if (cachehwgamma)
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{
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if (!vid_usinghwgamma)
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{
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vid_usinghwgamma = true;
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if (vid_gammarampsize != rampsize || !vid_gammaramps)
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{
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vid_gammarampsize = rampsize;
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if (vid_gammaramps) Free(vid_gammaramps);
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vid_gammaramps = (word *)Malloc(6 * vid_gammarampsize * sizeof(word));
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vid_systemgammaramps = vid_gammaramps + 3 * vid_gammarampsize;
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}
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VID_GetGamma(vid_systemgammaramps, vid_gammarampsize);
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}
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|
|
|
BuildGammaTable16(1.0f, cachegamma, 1.0f, 1.0f, vid_gammaramps, rampsize);
|
|
BuildGammaTable16(1.0f, cachegamma, 1.0f, 1.0f, vid_gammaramps + vid_gammarampsize, rampsize);
|
|
BuildGammaTable16(1.0f, cachegamma, 1.0f, 1.0f, vid_gammaramps + vid_gammarampsize * 2, rampsize);
|
|
|
|
// set vid_hardwaregammasupported to true if VID_SetGamma succeeds, OR if vid_hwgamma is >= 2 (forced gamma - ignores driver return value)
|
|
ri.Cvar_SetValue("vid_hardwaregammasupported", VID_SetGamma(vid_gammaramps, vid_gammarampsize) || cachehwgamma >= 2);
|
|
// if custom gamma ramps failed (Windows stupidity), restore to system gamma
|
|
if(!vid_hardwaregammasupported->value)
|
|
{
|
|
if (vid_usinghwgamma)
|
|
{
|
|
vid_usinghwgamma = false;
|
|
VID_SetGamma(vid_systemgammaramps, vid_gammarampsize);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (vid_usinghwgamma)
|
|
{
|
|
vid_usinghwgamma = false;
|
|
VID_SetGamma(vid_systemgammaramps, vid_gammarampsize);
|
|
}
|
|
}
|
|
}
|
|
|
|
void VID_RestoreSystemGamma(void)
|
|
{
|
|
if (vid_usinghwgamma)
|
|
{
|
|
vid_usinghwgamma = false;
|
|
ri.Cvar_SetValue("vid_hardwaregammasupported", VID_SetGamma(vid_systemgammaramps, vid_gammarampsize));
|
|
// force gamma situation to be reexamined next frame
|
|
gamma_forcenextframe = true;
|
|
}
|
|
} |