127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
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//=======================================================================
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// Copyright XashXT Group 2010 <20>
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// gl_draw.c - orthogonal drawing stuff
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//=======================================================================
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#include "common.h"
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#include "client.h"
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#include "gl_local.h"
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/*
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=================
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R_ResampleRaw
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=================
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*/
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static byte *R_ResampleRaw( const byte *source, int inWidth, int inHeight, int outWidth, int outHeight )
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{
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uint frac, fracStep;
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uint *in = (uint *)source;
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uint p1[0x1000], p2[0x1000];
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byte *pix1, *pix2, *pix3, *pix4;
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uint *inRow1, *inRow2, *out;
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static byte *resampled = NULL;
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int i, x, y;
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// clean frames doesn't contain raw buffer
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if( !source ) return NULL;
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resampled = Mem_Realloc( r_temppool, resampled, outWidth * outHeight * 4 );
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out = (uint *)resampled;
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fracStep = inWidth * 0x10000 / outWidth;
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frac = fracStep >> 2;
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for( i = 0; i < outWidth; i++ )
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{
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p1[i] = 4 * (frac >> 16);
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frac += fracStep;
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}
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frac = (fracStep >> 2) * 3;
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for( i = 0; i < outWidth; i++ )
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{
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p2[i] = 4 * (frac >> 16);
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frac += fracStep;
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}
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for( y = 0; y < outHeight; y++, out += outWidth )
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{
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inRow1 = in + inWidth * (int)(((float)y + 0.25) * inHeight/outHeight);
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inRow2 = in + inWidth * (int)(((float)y + 0.75) * inHeight/outHeight);
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for( x = 0; x < outWidth; x++ )
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{
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pix1 = (byte *)inRow1 + p1[x];
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pix2 = (byte *)inRow1 + p2[x];
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pix3 = (byte *)inRow2 + p1[x];
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pix4 = (byte *)inRow2 + p2[x];
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((byte *)(out+x))[0] = (pix1[0] + pix2[0] + pix3[0] + pix4[0]) >> 2;
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((byte *)(out+x))[1] = (pix1[1] + pix2[1] + pix3[1] + pix4[1]) >> 2;
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((byte *)(out+x))[2] = (pix1[2] + pix2[2] + pix3[2] + pix4[2]) >> 2;
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((byte *)(out+x))[3] = (pix1[3] + pix2[3] + pix3[3] + pix4[3]) >> 2;
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}
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}
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return resampled;
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}
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/*
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=============
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R_DrawStretchRaw
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=============
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*/
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void R_DrawStretchRaw( float x, float y, float w, float h, int cols, int rows, const byte *data, qboolean dirty )
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{
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byte *raw;
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if( !GL_Support( GL_ARB_TEXTURE_NPOT_EXT ))
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{
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int width = 1, height = 1;
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// check the dimensions
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while( width < cols ) width <<= 1;
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while( height < rows ) height <<= 1;
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if( cols != width || rows != height )
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{
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raw = R_ResampleRaw( data, cols, rows, width, height );
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cols = width;
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rows = height;
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}
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}
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else
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{
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raw = (byte *)data;
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}
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if( cols > glConfig.max_2d_texture_size )
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Host_Error( "R_DrawStretchRaw: size exceeds hardware limits (%i > %i)\n", cols, glConfig.max_2d_texture_size );
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if( rows > glConfig.max_2d_texture_size )
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Host_Error( "R_DrawStretchRaw: size exceeds hardware limits (%i > %i)\n", rows, glConfig.max_2d_texture_size );
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GL_Bind( 0, tr.cinTexture );
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if( cols == tr.cinTexture->width && rows == tr.cinTexture->height )
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{
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if( dirty ) pglTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, cols, rows, GL_BGRA, GL_UNSIGNED_BYTE, raw );
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}
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else
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{
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tr.cinTexture->width = cols;
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tr.cinTexture->height = rows;
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if( dirty ) pglTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, cols, rows, 0, GL_BGRA, GL_UNSIGNED_BYTE, raw );
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}
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GL_CheckForErrors();
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pglBegin( GL_QUADS );
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pglTexCoord2f( 0, 0 );
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pglVertex2f( x, y );
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pglTexCoord2f( 1, 0 );
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pglVertex2f( x + w, y );
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pglTexCoord2f( 1, 1 );
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pglVertex2f( x + w, y + h );
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pglTexCoord2f( 0, 1 );
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pglVertex2f( x, y + h );
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pglEnd();
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}
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