480 lines
14 KiB
C
480 lines
14 KiB
C
//=======================================================================
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// Copyright XashXT Group 2007 ©
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// r_bloom.c - lighting post process effect
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//=======================================================================
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#include "gl_local.h"
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static float Diamond8x[8][8] =
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{
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0.0f, 0.0f, 0.0f, 0.1f, 0.1f, 0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.2f, 0.3f, 0.3f, 0.2f, 0.0f, 0.0f,
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0.0f, 0.2f, 0.4f, 0.6f, 0.6f, 0.4f, 0.2f, 0.0f,
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0.1f, 0.3f, 0.6f, 0.9f, 0.9f, 0.6f, 0.3f, 0.1f,
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0.1f, 0.3f, 0.6f, 0.9f, 0.9f, 0.6f, 0.3f, 0.1f,
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0.0f, 0.2f, 0.4f, 0.6f, 0.6f, 0.4f, 0.2f, 0.0f,
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0.0f, 0.0f, 0.2f, 0.3f, 0.3f, 0.2f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.1f, 0.1f, 0.0f, 0.0f, 0.0f
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};
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static float Diamond6x[6][6] =
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{
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0.0f, 0.0f, 0.1f, 0.1f, 0.0f, 0.0f,
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0.0f, 0.3f, 0.5f, 0.5f, 0.3f, 0.0f,
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0.1f, 0.5f, 0.9f, 0.9f, 0.5f, 0.1f,
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0.1f, 0.5f, 0.9f, 0.9f, 0.5f, 0.1f,
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0.0f, 0.3f, 0.5f, 0.5f, 0.3f, 0.0f,
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0.0f, 0.0f, 0.1f, 0.1f, 0.0f, 0.0f
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};
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static float Diamond4x[4][4] =
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{
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0.3f, 0.4f, 0.4f, 0.3f,
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0.4f, 0.9f, 0.9f, 0.4f,
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0.4f, 0.9f, 0.9f, 0.4f,
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0.3f, 0.4f, 0.4f, 0.3f
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};
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static int BLOOM_SIZE;
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image_t *r_bloomscreentexture;
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image_t *r_bloomeffecttexture;
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image_t *r_bloombackuptexture;
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image_t *r_bloomdownsamplingtexture;
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static int r_screendownsamplingtexture_size;
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static int screen_texture_width, screen_texture_height;
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static int r_screenbackuptexture_size;
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//current refdef size:
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static int curView_x;
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static int curView_y;
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static int curView_width;
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static int curView_height;
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//texture coordinates of screen data inside screentexture
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static float screenText_tcw;
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static float screenText_tch;
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static int sample_width;
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static int sample_height;
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//texture coordinates of adjusted textures
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static float sampleText_tcw;
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static float sampleText_tch;
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//this macro is in sample size workspace coordinates
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#define R_Bloom_SamplePass( xpos, ypos )\
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qglBegin(GL_QUADS);\
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qglTexCoord2f( 0, sampleText_tch);\
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qglVertex2f( xpos, ypos);\
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qglTexCoord2f( 0, 0);\
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qglVertex2f( xpos, ypos+sample_height);\
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qglTexCoord2f( sampleText_tcw, 0); \
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qglVertex2f( xpos+sample_width, ypos+sample_height);\
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qglTexCoord2f(sampleText_tcw, sampleText_tch);\
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qglVertex2f(xpos+sample_width, ypos);\
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qglEnd();
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#define R_Bloom_Quad( x, y, width, height, textwidth, textheight )\
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qglBegin(GL_QUADS);\
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qglTexCoord2f( 0, textheight);\
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qglVertex2f( x, y);\
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qglTexCoord2f( 0, 0);\
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qglVertex2f( x, y+height);\
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qglTexCoord2f( textwidth, 0);\
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qglVertex2f( x+width, y+height);\
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qglTexCoord2f( textwidth, textheight);\
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qglVertex2f( x+width, y);\
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qglEnd();
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/*
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=================
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R_Bloom_InitBackUpTexture
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=================
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*/
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void R_Bloom_InitBackUpTexture( int width, int height )
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{
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byte *data;
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rgbdata_t r_bloom;
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data = Malloc( width * height * 4 );
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memset( data, 0, width * height * 4 );
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r_bloom.width = width;
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r_bloom.height = height;
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r_bloom.type = PF_PROCEDURE_TEX;
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r_bloom.flags = 0;
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r_bloom.numMips = 4;
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r_bloom.palette = NULL;
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r_bloom.buffer = data;
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r_screenbackuptexture_size = width;
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r_bloombackuptexture = R_LoadImage( "***r_bloombackuptexture***", &r_bloom, it_pic );
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Free ( data );
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}
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/*
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=================
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R_Bloom_InitEffectTexture
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=================
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*/
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void R_Bloom_InitEffectTexture( void )
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{
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byte *data;
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float bloomsizecheck;
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rgbdata_t r_bloomfx;
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if( (int)r_bloom_sample_size->value < 32 )
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ri.Cvar_SetValue ("r_bloom_sample_size", 32);
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//make sure bloom size is a power of 2
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BLOOM_SIZE = (int)r_bloom_sample_size->value;
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bloomsizecheck = (float)BLOOM_SIZE;
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while(bloomsizecheck > 1.0f) bloomsizecheck /= 2.0f;
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if( bloomsizecheck != 1.0f )
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{
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BLOOM_SIZE = 32;
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while( BLOOM_SIZE < (int)r_bloom_sample_size->value )
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BLOOM_SIZE *= 2;
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}
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//make sure bloom size doesn't have stupid values
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if( BLOOM_SIZE > screen_texture_width ||
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BLOOM_SIZE > screen_texture_height )
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BLOOM_SIZE = min( screen_texture_width, screen_texture_height );
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if( BLOOM_SIZE != (int)r_bloom_sample_size->value )
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ri.Cvar_SetValue ("r_bloom_sample_size", BLOOM_SIZE);
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data = malloc( BLOOM_SIZE * BLOOM_SIZE * 4 );
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memset( data, 0, BLOOM_SIZE * BLOOM_SIZE * 4 );
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r_bloomfx.width = BLOOM_SIZE;
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r_bloomfx.height = BLOOM_SIZE;
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r_bloomfx.type = PF_PROCEDURE_TEX;
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r_bloomfx.flags = 0;
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r_bloomfx.numMips = 4;
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r_bloomfx.palette = NULL;
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r_bloomfx.buffer = data;
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r_bloomeffecttexture = R_LoadImage( "***r_bloomeffecttexture***", &r_bloomfx, it_pic );
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free ( data );
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}
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/*
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=================
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R_Bloom_InitTextures
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=================
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*/
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void R_Bloom_InitTextures( void )
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{
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byte *data;
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int size;
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rgbdata_t r_bloomscr, r_downsample;
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//find closer power of 2 to screen size
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for (screen_texture_width = 1; screen_texture_width < vid.width; screen_texture_width *= 2);
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for (screen_texture_height = 1; screen_texture_height < vid.height; screen_texture_height *= 2);
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//disable blooms if we can't handle a texture of that size
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/* if( screen_texture_width > gl_config.maxTextureSize ||
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screen_texture_height > glConfig.maxTextureSize ) {
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screen_texture_width = screen_texture_height = 0;
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Cvar_SetValue ("r_bloom", 0);
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Com_Printf( "WARNING: 'R_InitBloomScreenTexture' too high resolution for Light Bloom. Effect disabled\n" );
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return;
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}*/
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//init the screen texture
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size = screen_texture_width * screen_texture_height * 4;
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data = malloc( size );
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memset( data, 255, size );
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r_bloomscr.width = screen_texture_width;
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r_bloomscr.height = screen_texture_height;
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r_bloomscr.type = 0;
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r_bloomscr.flags = 0;
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r_bloomscr.palette = NULL;
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r_bloomscr.buffer = (byte *)data;
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r_bloomscr.numMips = 4;
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r_bloomscreentexture = R_LoadImage( "***r_bloomscreentexture***", &r_bloomscr, it_pic );
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free ( data );
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//validate bloom size and init the bloom effect texture
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R_Bloom_InitEffectTexture ();
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//if screensize is more than 2x the bloom effect texture, set up for stepped downsampling
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r_bloomdownsamplingtexture = NULL;
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r_screendownsamplingtexture_size = 0;
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if( vid.width > (BLOOM_SIZE * 2) && !r_bloom_fast_sample->value )
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{
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r_screendownsamplingtexture_size = (int)(BLOOM_SIZE * 2);
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data = malloc( r_screendownsamplingtexture_size * r_screendownsamplingtexture_size * 4 );
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memset( data, 0, r_screendownsamplingtexture_size * r_screendownsamplingtexture_size * 4 );
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r_downsample.width = r_screendownsamplingtexture_size;
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r_downsample.height = r_screendownsamplingtexture_size;
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r_downsample.type = PF_PROCEDURE_TEX;
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r_downsample.flags = 0;
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r_downsample.palette = NULL;
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r_downsample.buffer = (byte *)data;
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r_downsample.numMips = 4;
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r_bloomdownsamplingtexture = R_LoadImage( "***r_bloomdownsampetexture***", &r_downsample, it_pic );
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free ( data );
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}
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//Init the screen backup texture
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if( r_screendownsamplingtexture_size )
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R_Bloom_InitBackUpTexture( r_screendownsamplingtexture_size, r_screendownsamplingtexture_size );
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else R_Bloom_InitBackUpTexture( BLOOM_SIZE, BLOOM_SIZE );
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}
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/*
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=================
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R_Bloom_DrawEffect
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=================
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*/
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void R_Bloom_DrawEffect( void )
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{
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GL_Bind(r_bloomeffecttexture->texnum);
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qglEnable(GL_BLEND);
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qglBlendFunc(GL_ONE, GL_ONE);
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qglColor4f(r_bloom_alpha->value, r_bloom_alpha->value, r_bloom_alpha->value, 1.0f);
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GL_TexEnv(GL_MODULATE);
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qglBegin(GL_QUADS);
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qglTexCoord2f( 0, sampleText_tch );
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qglVertex2f( curView_x, curView_y );
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qglTexCoord2f( 0, 0 );
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qglVertex2f( curView_x, curView_y + curView_height );
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qglTexCoord2f( sampleText_tcw, 0 );
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qglVertex2f( curView_x + curView_width, curView_y + curView_height );
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qglTexCoord2f( sampleText_tcw, sampleText_tch );
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qglVertex2f( curView_x + curView_width, curView_y );
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qglEnd();
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qglDisable(GL_BLEND);
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}
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/*
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=================
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R_Bloom_GeneratexDiamonds
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=================
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*/
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void R_Bloom_GeneratexDiamonds( void )
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{
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int i, j;
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static float intensity;
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//set up sample size workspace
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qglViewport( 0, 0, sample_width, sample_height );
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qglMatrixMode( GL_PROJECTION );
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qglLoadIdentity ();
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qglOrtho(0, sample_width, sample_height, 0, -10, 100);
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qglMatrixMode( GL_MODELVIEW );
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qglLoadIdentity ();
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//copy small scene into r_bloomeffecttexture
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GL_Bind(r_bloomeffecttexture->texnum);
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, sample_width, sample_height);
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//start modifying the small scene corner
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qglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
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qglEnable(GL_BLEND);
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//darkening passes
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if( r_bloom_darken->value )
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{
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qglBlendFunc(GL_DST_COLOR, GL_ZERO);
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GL_TexEnv(GL_MODULATE);
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for(i=0; i<r_bloom_darken->value ;i++) {
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R_Bloom_SamplePass( 0, 0 );
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}
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, sample_width, sample_height);
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}
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//bluring passes
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//qglBlendFunc(GL_ONE, GL_ONE);
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qglBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);
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if( r_bloom_diamond_size->value > 7 || r_bloom_diamond_size->value <= 3)
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{
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if( (int)r_bloom_diamond_size->value != 8 ) ri.Cvar_SetValue( "r_bloom_diamond_size", 8 );
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for(i=0; i<r_bloom_diamond_size->value; i++) {
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for(j=0; j<r_bloom_diamond_size->value; j++) {
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intensity = r_bloom_intensity->value * 0.3 * Diamond8x[i][j];
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if( intensity < 0.01f ) continue;
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qglColor4f( intensity, intensity, intensity, 1.0);
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R_Bloom_SamplePass( i-4, j-4 );
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}
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}
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} else if( r_bloom_diamond_size->value > 5 ) {
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if( r_bloom_diamond_size->value != 6 ) ri.Cvar_SetValue( "r_bloom_diamond_size", 6 );
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for(i=0; i<r_bloom_diamond_size->value; i++) {
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for(j=0; j<r_bloom_diamond_size->value; j++) {
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intensity = r_bloom_intensity->value * 0.5 * Diamond6x[i][j];
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if( intensity < 0.01f ) continue;
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qglColor4f( intensity, intensity, intensity, 1.0);
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R_Bloom_SamplePass( i-3, j-3 );
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}
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}
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} else if( r_bloom_diamond_size->value > 3 ) {
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if( (int)r_bloom_diamond_size->value != 4 ) ri.Cvar_SetValue( "r_bloom_diamond_size", 4 );
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for(i=0; i<r_bloom_diamond_size->value; i++) {
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for(j=0; j<r_bloom_diamond_size->value; j++) {
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intensity = r_bloom_intensity->value * 0.8f * Diamond4x[i][j];
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if( intensity < 0.01f ) continue;
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qglColor4f( intensity, intensity, intensity, 1.0);
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R_Bloom_SamplePass( i-2, j-2 );
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}
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}
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}
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, sample_width, sample_height);
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//restore full screen workspace
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qglViewport( 0, 0, vid.width, vid.height );
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qglMatrixMode( GL_PROJECTION );
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qglLoadIdentity ();
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qglOrtho(0, vid.width, vid.height, 0, -10, 100);
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qglMatrixMode( GL_MODELVIEW );
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qglLoadIdentity ();
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}
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/*
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=================
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R_Bloom_DownsampleView
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=================
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*/
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void R_Bloom_DownsampleView( void )
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{
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qglDisable( GL_BLEND );
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qglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
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//stepped downsample
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if( r_screendownsamplingtexture_size )
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{
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int midsample_width = r_screendownsamplingtexture_size * sampleText_tcw;
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int midsample_height = r_screendownsamplingtexture_size * sampleText_tch;
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//copy the screen and draw resized
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GL_Bind(r_bloomscreentexture->texnum);
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, curView_x, vid.height - (curView_y + curView_height), curView_width, curView_height);
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R_Bloom_Quad( 0, vid.height-midsample_height, midsample_width, midsample_height, screenText_tcw, screenText_tch );
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//now copy into Downsampling (mid-sized) texture
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GL_Bind(r_bloomdownsamplingtexture->texnum);
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, midsample_width, midsample_height);
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//now draw again in bloom size
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qglColor4f( 0.5f, 0.5f, 0.5f, 1.0f );
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R_Bloom_Quad( 0, vid.height-sample_height, sample_width, sample_height, sampleText_tcw, sampleText_tch );
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//now blend the big screen texture into the bloom generation space (hoping it adds some blur)
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qglEnable( GL_BLEND );
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qglBlendFunc(GL_ONE, GL_ONE);
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qglColor4f( 0.5f, 0.5f, 0.5f, 1.0f );
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GL_Bind(r_bloomscreentexture->texnum);
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R_Bloom_Quad( 0, vid.height-sample_height, sample_width, sample_height, screenText_tcw, screenText_tch );
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qglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
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qglDisable( GL_BLEND );
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} else { //downsample simple
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GL_Bind(r_bloomscreentexture->texnum);
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qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, curView_x, vid.height - (curView_y + curView_height), curView_width, curView_height);
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R_Bloom_Quad( 0, vid.height-sample_height, sample_width, sample_height, screenText_tcw, screenText_tch );
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}
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}
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/*
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=================
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R_BloomBlend
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=================
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*/
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void R_SetupGL (void);
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void R_BloomBlend ( refdef_t *fd )
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{
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if( !(fd->rdflags & RDF_BLOOM)|| !r_bloom->value )
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return;
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if( screen_texture_width < BLOOM_SIZE ||
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screen_texture_height < BLOOM_SIZE )
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return;
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//set up full screen workspace
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qglViewport( 0, 0, vid.width, vid.height );
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qglDisable( GL_DEPTH_TEST );
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qglMatrixMode( GL_PROJECTION );
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qglLoadIdentity ();
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qglOrtho(0, vid.width, vid.height, 0, -10, 100);
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qglMatrixMode( GL_MODELVIEW );
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qglLoadIdentity ();
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qglDisable(GL_CULL_FACE);
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qglDepthMask(false);
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qglDisable( GL_BLEND );
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qglEnable( GL_TEXTURE_2D );
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qglColor4f( 1, 1, 1, 1 );
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//set up current sizes
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curView_x = fd->x;
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curView_y = fd->y;
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curView_width = fd->width;
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curView_height = fd->height;
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screenText_tcw = ((float)fd->width / (float)screen_texture_width);
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screenText_tch = ((float)fd->height / (float)screen_texture_height);
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if( fd->height > fd->width )
|
|
{
|
|
sampleText_tcw = ((float)fd->width / (float)fd->height);
|
|
sampleText_tch = 1.0f;
|
|
}
|
|
else
|
|
{
|
|
sampleText_tcw = 1.0f;
|
|
sampleText_tch = ((float)fd->height / (float)fd->width);
|
|
}
|
|
sample_width = BLOOM_SIZE * sampleText_tcw;
|
|
sample_height = BLOOM_SIZE * sampleText_tch;
|
|
|
|
//copy the screen space we'll use to work into the backup texture
|
|
GL_Bind(r_bloombackuptexture->texnum);
|
|
qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, r_screenbackuptexture_size * sampleText_tcw, r_screenbackuptexture_size * sampleText_tch);
|
|
|
|
//create the bloom image
|
|
R_Bloom_DownsampleView();
|
|
R_Bloom_GeneratexDiamonds();
|
|
|
|
//restore the screen-backup to the screen
|
|
qglDisable(GL_BLEND);
|
|
GL_Bind(r_bloombackuptexture->texnum);
|
|
qglColor4f( 1, 1, 1, 1 );
|
|
R_Bloom_Quad( 0,
|
|
vid.height - (r_screenbackuptexture_size * sampleText_tch),
|
|
r_screenbackuptexture_size * sampleText_tcw,
|
|
r_screenbackuptexture_size * sampleText_tch,
|
|
sampleText_tcw, sampleText_tch );
|
|
|
|
R_Bloom_DrawEffect();
|
|
|
|
qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
qglEnable (GL_TEXTURE_2D);
|
|
qglEnable( GL_DEPTH_TEST );
|
|
qglColor4f(1,1,1,1);
|
|
qglDepthMask(true);
|
|
}
|
|
|
|
|