xash3d-fwgs/ref/gl/gl_draw.c

282 lines
6.4 KiB
C

/*
gl_draw.c - orthogonal drawing stuff
Copyright (C) 2010 Uncle Mike
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 3 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.
*/
#include "gl_local.h"
/*
=============
R_GetImageParms
=============
*/
void R_GetTextureParms( int *w, int *h, int texnum )
{
gl_texture_t *glt;
glt = R_GetTexture( texnum );
if( w ) *w = glt->srcWidth;
if( h ) *h = glt->srcHeight;
}
/*
=============
R_GetSpriteParms
same as GetImageParms but used
for sprite models
=============
*/
void R_GetSpriteParms( int *frameWidth, int *frameHeight, int *numFrames, int currentFrame, const model_t *pSprite )
{
mspriteframe_t *pFrame;
if( !pSprite || pSprite->type != mod_sprite ) return; // bad model ?
pFrame = R_GetSpriteFrame( pSprite, currentFrame, 0.0f );
if( frameWidth ) *frameWidth = pFrame->width;
if( frameHeight ) *frameHeight = pFrame->height;
if( numFrames ) *numFrames = pSprite->numframes;
}
int R_GetSpriteTexture( const model_t *m_pSpriteModel, int frame )
{
if( !m_pSpriteModel || m_pSpriteModel->type != mod_sprite || !m_pSpriteModel->cache.data )
return 0;
return R_GetSpriteFrame( m_pSpriteModel, frame, 0.0f )->gl_texturenum;
}
/*
=============
R_DrawStretchPic
=============
*/
void R_DrawStretchPic( float x, float y, float w, float h, float s1, float t1, float s2, float t2, int texnum )
{
GL_Bind( XASH_TEXTURE0, texnum );
pglBegin( GL_QUADS );
pglTexCoord2f( s1, t1 );
pglVertex2f( x, y );
pglTexCoord2f( s2, t1 );
pglVertex2f( x + w, y );
pglTexCoord2f( s2, t2 );
pglVertex2f( x + w, y + h );
pglTexCoord2f( s1, t2 );
pglVertex2f( x, y + h );
pglEnd();
}
/*
=============
Draw_TileClear
This repeats a 64*64 tile graphic to fill the screen around a sized down
refresh window.
=============
*/
void R_DrawTileClear( int texnum, int x, int y, int w, int h )
{
float tw, th;
gl_texture_t *glt;
GL_SetRenderMode( kRenderNormal );
pglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
GL_Bind( XASH_TEXTURE0, texnum );
glt = R_GetTexture( texnum );
tw = glt->srcWidth;
th = glt->srcHeight;
pglBegin( GL_QUADS );
pglTexCoord2f( x / tw, y / th );
pglVertex2f( x, y );
pglTexCoord2f((x + w) / tw, y / th );
pglVertex2f( x + w, y );
pglTexCoord2f((x + w) / tw, (y + h) / th );
pglVertex2f( x + w, y + h );
pglTexCoord2f( x / tw, (y + h) / th );
pglVertex2f( x, y + h );
pglEnd ();
}
/*
=============
R_DrawStretchRaw
=============
*/
void R_DrawStretchRaw( float x, float y, float w, float h, int cols, int rows, const byte *data, qboolean dirty )
{
byte *raw = NULL;
gl_texture_t *tex;
if( !GL_Support( GL_ARB_TEXTURE_NPOT_EXT ))
{
int width = 1, height = 1;
// check the dimensions
width = NearestPOW( cols, true );
height = NearestPOW( rows, false );
if( cols != width || rows != height )
{
raw = GL_ResampleTexture( data, cols, rows, width, height, false );
cols = width;
rows = height;
}
}
else
{
raw = (byte *)data;
}
if( cols > glConfig.max_2d_texture_size )
gEngfuncs.Host_Error( "R_DrawStretchRaw: size %i exceeds hardware limits\n", cols );
if( rows > glConfig.max_2d_texture_size )
gEngfuncs.Host_Error( "R_DrawStretchRaw: size %i exceeds hardware limits\n", rows );
pglDisable( GL_BLEND );
pglDisable( GL_ALPHA_TEST );
pglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
tex = R_GetTexture( tr.cinTexture );
GL_Bind( XASH_TEXTURE0, tr.cinTexture );
if( cols == tex->width && rows == tex->height )
{
if( dirty )
{
pglTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, cols, rows, GL_BGRA, GL_UNSIGNED_BYTE, raw );
}
}
else
{
tex->size = cols * rows * 4;
tex->width = cols;
tex->height = rows;
if( dirty )
{
pglTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, cols, rows, 0, GL_BGRA, GL_UNSIGNED_BYTE, raw );
}
}
pglBegin( GL_QUADS );
pglTexCoord2f( 0, 0 );
pglVertex2f( x, y );
pglTexCoord2f( 1, 0 );
pglVertex2f( x + w, y );
pglTexCoord2f( 1, 1 );
pglVertex2f( x + w, y + h );
pglTexCoord2f( 0, 1 );
pglVertex2f( x, y + h );
pglEnd();
}
/*
=============
R_UploadStretchRaw
=============
*/
void R_UploadStretchRaw( int texture, int cols, int rows, int width, int height, const byte *data )
{
byte *raw = NULL;
gl_texture_t *tex;
if( !GL_Support( GL_ARB_TEXTURE_NPOT_EXT ))
{
// check the dimensions
width = NearestPOW( width, true );
height = NearestPOW( height, false );
}
else
{
width = bound( 128, width, glConfig.max_2d_texture_size );
height = bound( 128, height, glConfig.max_2d_texture_size );
}
if( cols != width || rows != height )
{
raw = GL_ResampleTexture( data, cols, rows, width, height, false );
cols = width;
rows = height;
}
else
{
raw = (byte *)data;
}
if( cols > glConfig.max_2d_texture_size )
gEngfuncs.Host_Error( "R_UploadStretchRaw: size %i exceeds hardware limits\n", cols );
if( rows > glConfig.max_2d_texture_size )
gEngfuncs.Host_Error( "R_UploadStretchRaw: size %i exceeds hardware limits\n", rows );
tex = R_GetTexture( texture );
GL_Bind( GL_KEEP_UNIT, texture );
tex->width = cols;
tex->height = rows;
pglTexImage2D( GL_TEXTURE_2D, 0, tex->format, cols, rows, 0, GL_BGRA, GL_UNSIGNED_BYTE, raw );
GL_ApplyTextureParams( tex );
}
/*
===============
R_Set2DMode
===============
*/
void R_Set2DMode( qboolean enable )
{
if( enable )
{
if( glState.in2DMode )
return;
// set 2D virtual screen size
pglViewport( 0, 0, gpGlobals->width, gpGlobals->height );
pglMatrixMode( GL_PROJECTION );
pglLoadIdentity();
pglOrtho( 0, gpGlobals->width, gpGlobals->height, 0, -99999, 99999 );
pglMatrixMode( GL_MODELVIEW );
pglLoadIdentity();
GL_Cull( GL_NONE );
pglDepthMask( GL_FALSE );
pglDisable( GL_DEPTH_TEST );
pglEnable( GL_ALPHA_TEST );
pglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
glState.in2DMode = true;
RI.currententity = NULL;
RI.currentmodel = NULL;
}
else
{
pglDepthMask( GL_TRUE );
pglEnable( GL_DEPTH_TEST );
glState.in2DMode = false;
pglMatrixMode( GL_PROJECTION );
GL_LoadMatrix( RI.projectionMatrix );
pglMatrixMode( GL_MODELVIEW );
GL_LoadMatrix( RI.worldviewMatrix );
GL_Cull( GL_FRONT );
}
}