mirror of
https://git.code.sf.net/p/quake/quakeforge
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136 lines
3 KiB
C
136 lines
3 KiB
C
/*
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gl_graph.c
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(description)
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((used)) const char rcsid[] =
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"$Id$";
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include "QF/cvar.h"
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#include "QF/draw.h"
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#include "QF/render.h"
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#include "QF/sys.h"
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#include "QF/GL/defines.h"
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#include "QF/GL/funcs.h"
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#include "QF/GL/qf_textures.h"
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#include "r_internal.h"
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#define NUM_GRAPH_TEXTURES 8
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static byte *graph_texels[NUM_GRAPH_TEXTURES];
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static int graph_texture[NUM_GRAPH_TEXTURES];
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static int graph_index;
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static int graph_size[NUM_GRAPH_TEXTURES];
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static int graph_width[NUM_GRAPH_TEXTURES];
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int
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R_InitGraphTextures (int base)
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{
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int i;
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for (i = 0; i < NUM_GRAPH_TEXTURES; i++)
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graph_texture[i] = base++;
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return base;
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}
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VISIBLE void
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R_LineGraph (int x, int y, int *h_vals, int count)
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{
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byte color;
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byte *dest;
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int size, h, i, j, s;
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if (!count)
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return;
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s = r_graphheight->int_val;
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size = s * count;
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if (size > graph_size[graph_index]) {
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graph_size[graph_index] = size;
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graph_texels[graph_index] = realloc (graph_texels[graph_index], size);
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}
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graph_width[graph_index] = count;
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if (!graph_texels[graph_index])
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Sys_Error ("R_LineGraph: failed to allocate texture buffer");
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i = 0;
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while (count--) {
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dest = graph_texels[graph_index] + i++;
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h = *h_vals++;
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if (h == 10000)
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color = 0x6f; // yellow
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else if (h == 9999)
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color = 0x4f; // red
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else if (h == 9998)
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color = 0xd0; // blue
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else
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color = 0xfe; // white
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if (h > s)
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h = s;
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for (j = 0; j < h; j++, dest += graph_width[graph_index])
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dest[0] = color;
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for (; j < s; j++, dest += graph_width[graph_index])
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dest[0] = 0xff;
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}
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qfglBindTexture (GL_TEXTURE_2D, graph_texture[graph_index]);
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GL_Upload8 (graph_texels[graph_index], graph_width[graph_index], s, 0, 1);
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qfglBegin (GL_QUADS);
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qfglTexCoord2f (0, 0);
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qfglVertex2f (x, y);
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qfglTexCoord2f (1, 0);
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qfglVertex2f (x + graph_width[graph_index], y);
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qfglTexCoord2f (1, 1);
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qfglVertex2f (x + graph_width[graph_index], y - s);
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qfglTexCoord2f (0, 1);
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qfglVertex2f (x, y - s);
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qfglEnd ();
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graph_index = (graph_index + 1) % NUM_GRAPH_TEXTURES;
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}
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