316 lines
6.7 KiB
C
316 lines
6.7 KiB
C
/*
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Copyright (C) 1997-2001 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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// draw.c
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#include "gl_local.h"
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image_t *draw_chars;
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byte def_font[] =
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{
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#include "lhfont.h"
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};
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/*
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=============
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Draw_FindPic
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=============
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*/
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image_t *Draw_FindPic (char *name)
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{
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char fullname[MAX_QPATH];
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sprintf (fullname, "graphics/%s", name);
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return R_FindImage (fullname, NULL, 0, it_pic);
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}
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/*
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===============
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Draw_InitLocal
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===============
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*/
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void Draw_InitLocal (void)
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{
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// load console characters (don't bilerp characters)
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draw_chars = R_FindImage("graphics/fonts/conchars", def_font, sizeof(def_font), it_pic);
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GL_Bind( draw_chars->texnum[0] );
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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}
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/*
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================
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Draw_String
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================
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*/
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void Draw_String (int x, int y, char *str)
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{
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while (*str)
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{
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Draw_Char(x, y, *str);
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str++;
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x += 8;
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}
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}
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void Draw_Char (float x, float y, int num)
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{
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int row, col;
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float frow, fcol, size;
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num &= 255;
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if ( (num & 127) == 32 ) return;// space
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if (y <= -8) return; // totally off screen
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row = num>>4;
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col = num&15;
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frow = row*0.0625;
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fcol = col*0.0625;
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size = 0.0625;
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GL_Bind (draw_chars->texnum[0]);
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VA_SetElem2(tex_array[0],fcol, frow);
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VA_SetElem2(vert_array[0],x, y);
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VA_SetElem2(tex_array[1],fcol + size, frow);
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VA_SetElem2(vert_array[1],x+8, y);
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VA_SetElem2(tex_array[2],fcol + size, frow + size);
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VA_SetElem2(vert_array[2],x+8, y+8);
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VA_SetElem2(tex_array[3],fcol, frow + size);
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VA_SetElem2(vert_array[3],x, y+8);
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GL_LockArrays( 4 );
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qglDrawArrays(GL_QUADS, 0, 4);
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GL_UnlockArrays();
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}
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/*
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=============
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Draw_GetPicSize
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=============
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*/
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void Draw_GetPicSize (int *w, int *h, char *pic)
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{
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image_t *gl;
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gl = Draw_FindPic (pic);
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if (!gl)
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{
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*w = *h = -1;
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return;
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}
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*w = gl->width;
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*h = gl->height;
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}
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/*
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=============
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Draw_StretchPic
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=============
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*/
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void Draw_StretchPic (float x, float y, float w, float h, float s1, float t1, float s2, float t2, char *pic)
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{
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image_t *gl;
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gl = Draw_FindPic( pic );
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if(!gl) return;
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GL_Bind (gl->texnum[0]);
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GL_EnableBlend();
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GL_TexEnv( GL_MODULATE );
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if(gl_state.draw_color[3] != 1.0f )
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{
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GL_DisableAlphaTest();
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qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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}
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else
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{
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GL_EnableAlphaTest();
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qglBlendFunc(GL_ONE, GL_ZERO);
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}
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qglColor4fv( gl_state.draw_color );
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VA_SetElem2(tex_array[0], s1, t1);
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VA_SetElem2(vert_array[0], x, y);
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VA_SetElem2(tex_array[1], s2, t1);
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VA_SetElem2(vert_array[1], x+w, y);
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VA_SetElem2(tex_array[2], s2, t2);
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VA_SetElem2(vert_array[2], x+w, y+h);
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VA_SetElem2(tex_array[3], s1, t2);
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VA_SetElem2(vert_array[3], x, y+h);
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GL_LockArrays( 4 );
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qglDrawArrays(GL_QUADS, 0, 4);
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GL_UnlockArrays();
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GL_DisableBlend();
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GL_EnableAlphaTest();
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}
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/*
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=============
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Draw_Pic
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=============
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*/
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void Draw_Pic (int x, int y, char *pic)
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{
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image_t *gl;
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gl = Draw_FindPic (pic);
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if (!gl) return;
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GL_Bind (gl->texnum[0]);
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qglBegin (GL_QUADS);
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qglTexCoord2f (0, 0);
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qglVertex2f (x, y);
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qglTexCoord2f (1, 0);
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qglVertex2f (x+gl->width, y);
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qglTexCoord2f (1, 1);
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qglVertex2f (x+gl->width, y+gl->height);
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qglTexCoord2f (0, 1);
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qglVertex2f (x, y+gl->height);
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qglEnd ();
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}
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/*
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=============
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Draw_TileClear
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This repeats a 64*64 tile graphic to fill the screen around a sized down
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refresh window.
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=============
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*/
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void Draw_TileClear (int x, int y, int w, int h, char *pic)
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{
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image_t *image;
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image = Draw_FindPic (pic);
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if (!image) return;
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GL_Bind (image->texnum[0]);
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qglBegin (GL_QUADS);
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qglTexCoord2f (x/64.0, y/64.0);
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qglVertex2f (x, y);
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qglTexCoord2f ( (x+w)/64.0, y/64.0);
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qglVertex2f (x+w, y);
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qglTexCoord2f ( (x+w)/64.0, (y+h)/64.0);
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qglVertex2f (x+w, y+h);
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qglTexCoord2f ( x/64.0, (y+h)/64.0 );
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qglVertex2f (x, y+h);
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qglEnd ();
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}
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/*
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=============
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Draw_Fill
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Fills a box of pixels with a single color
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=============
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*/
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void Draw_Fill(float x, float y, float w, float h)
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{
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qglDisable (GL_TEXTURE_2D);
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qglColor4fv(gl_state.draw_color);
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GL_EnableBlend();
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if(gl_state.draw_color[3] != 1.0f )
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qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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else qglBlendFunc(GL_ONE, GL_ZERO);
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qglBegin (GL_QUADS);
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qglVertex2f(x, y);
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qglVertex2f(x + w, y);
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qglVertex2f(x + w, y + h);
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qglVertex2f(x, y + h);
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qglEnd();
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GL_DisableBlend();
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qglEnable (GL_TEXTURE_2D);
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}
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//=============================================================================
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/*
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================
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Draw_FadeScreen
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================
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*/
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void Draw_FadeScreen (void)
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{
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qglEnable (GL_BLEND);
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qglDisable (GL_TEXTURE_2D);
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qglColor4f (0, 0, 0, 0.8);
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qglBegin (GL_QUADS);
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qglVertex2f (0,0);
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qglVertex2f (r_width->integer, 0);
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qglVertex2f (r_width->integer, r_height->integer);
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qglVertex2f (0, r_height->integer);
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qglEnd ();
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qglColor4f (1,1,1,1);
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qglEnable (GL_TEXTURE_2D);
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qglDisable (GL_BLEND);
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}
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//====================================================================
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/*
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=============
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Draw_StretchRaw
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=============
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*/
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void Draw_StretchRaw (int x, int y, int w, int h, int cols, int rows, byte *data, bool dirty)
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{
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int i, j;
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qglFinish();
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// make sure rows and cols are powers of 2
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for( i = 0;(1<<i) < cols; i++ );
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for( j = 0;(1<<j) < rows; j++ );
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if ((1<<i ) != cols || ( 1<<j ) != rows)
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Sys_Error ("Draw_StretchRaw: size not a power of 2: %i by %i", cols, rows);
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GL_Bind(0);
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if( dirty ) qglTexImage2D (GL_TEXTURE_2D, 0, gl_tex_solid_format, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
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GL_TexFilter( false );
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R_SetGL2D();
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qglColor4fv(gl_state.draw_color);
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qglBegin(GL_QUADS);
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qglTexCoord2f( 0.5f / cols, 0.5f / rows );
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qglVertex2f (x, y);
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qglTexCoord2f((cols - 0.5f) / cols , 0.5f / rows );
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qglVertex2f (x+w, y);
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qglTexCoord2f((cols - 0.5f) / cols, (rows - 0.5f) / rows );
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qglVertex2f (x+w, y+h);
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qglTexCoord2f(0.5f / cols, ( rows - 0.5f )/rows );
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qglVertex2f (x, y+h);
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qglEnd();
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} |