1 /* Emacs style mode select -*- C++ -*-
2 *-----------------------------------------------------------------------------
3 *
4 *
5 * PrBoom: a Doom port merged with LxDoom and LSDLDoom
6 * based on BOOM, a modified and improved DOOM engine
7 * Copyright (C) 1999 by
8 * id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
9 * Copyright (C) 1999-2000 by
10 * Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
11 * Copyright 2005, 2006 by
12 * Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 * 02111-1307, USA.
28 *
29 * DESCRIPTION:
30 *
31 *---------------------------------------------------------------------
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include "config.h"
36 #endif
37
38 #include "gl_opengl.h"
39
40 #include "v_video.h"
41 #include "gl_intern.h"
42 #include "m_random.h"
43 #include "lprintf.h"
44 #include "e6y.h"
45
46 static GLuint wipe_scr_start_tex = 0;
47 static GLuint wipe_scr_end_tex = 0;
48
CaptureScreenAsTexID(void)49 GLuint CaptureScreenAsTexID(void)
50 {
51 GLuint id;
52
53 gld_EnableTexture2D(GL_TEXTURE0_ARB, true);
54
55 glGenTextures(1, &id);
56 glBindTexture(GL_TEXTURE_2D, id);
57
58 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
59 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
60 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
61 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
62
63 glTexImage2D(GL_TEXTURE_2D, 0, 3,
64 gld_GetTexDimension(SCREENWIDTH), gld_GetTexDimension(SCREENHEIGHT),
65 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
66
67 glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, SCREENWIDTH, SCREENHEIGHT);
68
69 return id;
70 }
71
gld_wipe_doMelt(int ticks,int * y_lookup)72 int gld_wipe_doMelt(int ticks, int *y_lookup)
73 {
74 int i;
75 int total_w, total_h;
76 float fU1, fU2, fV1, fV2;
77
78 total_w = gld_GetTexDimension(SCREENWIDTH);
79 total_h = gld_GetTexDimension(SCREENHEIGHT);
80
81 fU1 = 0.0f;
82 fV1 = (float)SCREENHEIGHT / (float)total_h;
83 fU2 = (float)SCREENWIDTH / (float)total_w;
84 fV2 = 0.0f;
85
86 gld_EnableTexture2D(GL_TEXTURE0_ARB, true);
87
88 glBindTexture(GL_TEXTURE_2D, wipe_scr_end_tex);
89 glColor3f(1.0f, 1.0f, 1.0f);
90
91 glBegin(GL_TRIANGLE_STRIP);
92 {
93 glTexCoord2f(fU1, fV1); glVertex2f(0.0f, 0.0f);
94 glTexCoord2f(fU1, fV2); glVertex2f(0.0f, (float)SCREENHEIGHT);
95 glTexCoord2f(fU2, fV1); glVertex2f((float)SCREENWIDTH, 0.0f);
96 glTexCoord2f(fU2, fV2); glVertex2f((float)SCREENWIDTH, (float)SCREENHEIGHT);
97 }
98 glEnd();
99
100 glBindTexture(GL_TEXTURE_2D, wipe_scr_start_tex);
101 glColor3f(1.0f, 1.0f, 1.0f);
102
103 glBegin(GL_QUAD_STRIP);
104
105 for (i=0; i <= SCREENWIDTH; i++)
106 {
107 int yoffs = MAX(0, y_lookup[i]);
108
109 float tx = (float) i / total_w;
110 float sx = (float) i;
111 float sy = (float) yoffs;
112
113 glTexCoord2f(tx, fV1); glVertex2f(sx, sy);
114 glTexCoord2f(tx, fV2); glVertex2f(sx, sy + (float)SCREENHEIGHT);
115 }
116
117 glEnd();
118
119 return 0;
120 }
121
gld_wipe_exitMelt(int ticks)122 int gld_wipe_exitMelt(int ticks)
123 {
124 if (wipe_scr_start_tex != 0)
125 {
126 glDeleteTextures(1, &wipe_scr_start_tex);
127 wipe_scr_start_tex = 0;
128 }
129 if (wipe_scr_end_tex != 0)
130 {
131 glDeleteTextures(1, &wipe_scr_end_tex);
132 wipe_scr_end_tex = 0;
133 }
134
135 gld_ResetLastTexture();
136
137 return 0;
138 }
139
gld_wipe_StartScreen(void)140 int gld_wipe_StartScreen(void)
141 {
142 wipe_scr_start_tex = CaptureScreenAsTexID();
143
144 return 0;
145 }
146
gld_wipe_EndScreen(void)147 int gld_wipe_EndScreen(void)
148 {
149 glFlush();
150 wipe_scr_end_tex = CaptureScreenAsTexID();
151
152 return 0;
153 }
154