569 lines
12 KiB
C
569 lines
12 KiB
C
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// $Id:$
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//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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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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//
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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. See the
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// GNU General Public License for more details.
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//
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// $Log:$
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//
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// DESCRIPTION:
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// DOOM graphics stuff for X11, UNIX.
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//
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//-----------------------------------------------------------------------------
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static const char
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rcsid[] = "$Id: i_x.c,v 1.6 1997/02/03 22:45:10 b1 Exp $";
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#include "config.h"
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#include "v_video.h"
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#include "m_argv.h"
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#include "d_event.h"
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#include "d_main.h"
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#include "i_video.h"
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#include "z_zone.h"
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#include "tables.h"
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#include "doomkeys.h"
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#include <stdbool.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <linux/fb.h>
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#include <sys/ioctl.h>
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//#define CMAP256
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struct fb_var_screeninfo fb = {};
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int fb_scaling = 1;
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int usemouse = 0;
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struct color {
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uint32_t b:8;
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uint32_t g:8;
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uint32_t r:8;
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uint32_t a:8;
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};
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static struct color colors[256];
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// The screen buffer; this is modified to draw things to the screen
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byte *I_VideoBuffer = NULL;
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byte *I_VideoBuffer_FB = NULL;
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/* framebuffer file descriptor */
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int fd_fb = 0;
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int X_width;
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int X_height;
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// If true, game is running as a screensaver
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boolean screensaver_mode = false;
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// Flag indicating whether the screen is currently visible:
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// when the screen isnt visible, don't render the screen
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boolean screenvisible;
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// Mouse acceleration
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//
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// This emulates some of the behavior of DOS mouse drivers by increasing
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// the speed when the mouse is moved fast.
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//
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// The mouse input values are input directly to the game, but when
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// the values exceed the value of mouse_threshold, they are multiplied
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// by mouse_acceleration to increase the speed.
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float mouse_acceleration = 2.0;
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int mouse_threshold = 10;
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// Gamma correction level to use
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int usegamma = 0;
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typedef struct
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{
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byte r;
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byte g;
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byte b;
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} col_t;
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// Palette converted to RGB565
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static uint16_t rgb565_palette[256];
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void cmap_to_rgb565(uint16_t * out, uint8_t * in, int in_pixels)
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{
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int i, j;
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struct color c;
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uint16_t r, g, b;
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for (i = 0; i < in_pixels; i++)
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{
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c = colors[*in];
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r = ((uint16_t)(c.r >> 3)) << 11;
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g = ((uint16_t)(c.g >> 2)) << 5;
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b = ((uint16_t)(c.b >> 3)) << 0;
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*out = (r | g | b);
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in++;
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for (j = 0; j < fb_scaling; j++) {
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out++;
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}
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}
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}
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void cmap_to_fb(uint8_t * out, uint8_t * in, int in_pixels)
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{
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int i, j, k;
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struct color c;
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uint32_t pix;
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uint16_t r, g, b;
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for (i = 0; i < in_pixels; i++)
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{
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c = colors[*in]; /* R:8 G:8 B:8 format! */
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r = (uint16_t)(c.r >> (8 - fb.red.length));
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g = (uint16_t)(c.g >> (8 - fb.green.length));
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b = (uint16_t)(c.b >> (8 - fb.blue.length));
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pix = r << fb.red.offset;
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pix |= g << fb.green.offset;
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pix |= b << fb.blue.offset;
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for (k = 0; k < fb_scaling; k++) {
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for (j = 0; j < fb.bits_per_pixel/8; j++) {
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*out = (pix >> (j*8));
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out++;
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}
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}
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in++;
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}
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}
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void I_InitGraphics (void)
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{
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int i;
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/* Open fbdev file descriptor */
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fd_fb = open("/dev/fb0", O_RDWR);
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if (fd_fb < 0)
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{
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printf("Could not open /dev/fb0");
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exit(-1);
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}
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/* fetch framebuffer info */
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ioctl(fd_fb, FBIOGET_VSCREENINFO, &fb);
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/* change params if needed */
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//ioctl(fd_fb, FBIOPUT_VSCREENINFO, &fb);
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printf("I_InitGraphics: framebuffer: x_res: %d, y_res: %d, x_virtual: %d, y_virtual: %d, bpp: %d, grayscale: %d\n",
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fb.xres, fb.yres, fb.xres_virtual, fb.yres_virtual, fb.bits_per_pixel, fb.grayscale);
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printf("I_InitGraphics: framebuffer: RGBA: %d%d%d%d, red_off: %d, green_off: %d, blue_off: %d, transp_off: %d\n",
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fb.red.length, fb.green.length, fb.blue.length, fb.transp.length, fb.red.offset, fb.green.offset, fb.blue.offset, fb.transp.offset);
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printf("I_InitGraphics: DOOM screen size: w x h: %d x %d\n", SCREENWIDTH, SCREENHEIGHT);
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i = M_CheckParmWithArgs("-scaling", 1);
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if (i > 0) {
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i = atoi(myargv[i + 1]);
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fb_scaling = i;
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printf("I_InitGraphics: Scaling factor: %d\n", fb_scaling);
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} else {
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fb_scaling = fb.xres / SCREENWIDTH;
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if (fb.yres / SCREENHEIGHT < fb_scaling)
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fb_scaling = fb.yres / SCREENHEIGHT;
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printf("I_InitGraphics: Auto-scaling factor: %d\n", fb_scaling);
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}
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/* Allocate screen to draw to */
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I_VideoBuffer = (byte*)Z_Malloc (SCREENWIDTH * SCREENHEIGHT, PU_STATIC, NULL); // For DOOM to draw on
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I_VideoBuffer_FB = (byte*)malloc(fb.xres * fb.yres * (fb.bits_per_pixel/8)); // For a single write() syscall to fbdev
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screenvisible = true;
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extern int I_InitInput(void);
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I_InitInput();
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}
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void I_ShutdownGraphics (void)
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{
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Z_Free (I_VideoBuffer);
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free(I_VideoBuffer_FB);
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}
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void I_StartFrame (void)
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{
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}
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__attribute__ ((weak)) void I_GetEvent (void)
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{
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// event_t event;
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// bool button_state;
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//
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// button_state = button_read ();
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//
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// if (last_button_state != button_state)
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// {
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// last_button_state = button_state;
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//
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// event.type = last_button_state ? ev_keydown : ev_keyup;
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// event.data1 = KEY_FIRE;
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// event.data2 = -1;
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// event.data3 = -1;
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//
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// D_PostEvent (&event);
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// }
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//
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// touch_main ();
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//
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// if ((touch_state.x != last_touch_state.x) || (touch_state.y != last_touch_state.y) || (touch_state.status != last_touch_state.status))
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// {
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// last_touch_state = touch_state;
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//
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// event.type = (touch_state.status == TOUCH_PRESSED) ? ev_keydown : ev_keyup;
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// event.data1 = -1;
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// event.data2 = -1;
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// event.data3 = -1;
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//
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// if ((touch_state.x > 49)
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// && (touch_state.x < 72)
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// && (touch_state.y > 104)
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// && (touch_state.y < 143))
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// {
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// // select weapon
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// if (touch_state.x < 60)
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// {
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// // lower row (5-7)
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// if (touch_state.y < 119)
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// {
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// event.data1 = '5';
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// }
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// else if (touch_state.y < 131)
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// {
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// event.data1 = '6';
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// }
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// else
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// {
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// event.data1 = '1';
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// }
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// }
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// else
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// {
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// // upper row (2-4)
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// if (touch_state.y < 119)
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// {
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// event.data1 = '2';
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// }
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// else if (touch_state.y < 131)
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// {
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// event.data1 = '3';
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// }
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// else
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// {
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// event.data1 = '4';
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// }
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// }
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// }
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// else if (touch_state.x < 40)
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// {
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// // button bar at bottom screen
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// if (touch_state.y < 40)
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// {
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// // enter
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// event.data1 = KEY_ENTER;
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// }
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// else if (touch_state.y < 80)
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// {
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// // escape
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// event.data1 = KEY_ESCAPE;
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// }
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// else if (touch_state.y < 120)
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// {
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// // use
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// event.data1 = KEY_USE;
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// }
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// else if (touch_state.y < 160)
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// {
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// // map
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// event.data1 = KEY_TAB;
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// }
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// else if (touch_state.y < 200)
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// {
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// // pause
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// event.data1 = KEY_PAUSE;
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// }
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// else if (touch_state.y < 240)
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// {
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// // toggle run
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// if (touch_state.status == TOUCH_PRESSED)
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// {
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// run = !run;
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//
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// event.data1 = KEY_RSHIFT;
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//
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// if (run)
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// {
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// event.type = ev_keydown;
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// }
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// else
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// {
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// event.type = ev_keyup;
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// }
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// }
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// else
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// {
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// return;
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// }
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// }
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// else if (touch_state.y < 280)
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// {
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// // save
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// event.data1 = KEY_F2;
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// }
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// else if (touch_state.y < 320)
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// {
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// // load
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// event.data1 = KEY_F3;
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// }
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// }
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// else
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// {
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// // movement/menu navigation
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// if (touch_state.x < 100)
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// {
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// if (touch_state.y < 100)
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// {
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// event.data1 = KEY_STRAFE_L;
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// }
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// else if (touch_state.y < 220)
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// {
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// event.data1 = KEY_DOWNARROW;
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// }
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// else
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// {
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// event.data1 = KEY_STRAFE_R;
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// }
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// }
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// else if (touch_state.x < 180)
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// {
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// if (touch_state.y < 160)
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// {
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// event.data1 = KEY_LEFTARROW;
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// }
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// else
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// {
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// event.data1 = KEY_RIGHTARROW;
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// }
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// }
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// else
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// {
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// event.data1 = KEY_UPARROW;
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// }
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// }
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//
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// D_PostEvent (&event);
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// }
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}
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__attribute__ ((weak)) void I_StartTic (void)
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{
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I_GetEvent();
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}
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void I_UpdateNoBlit (void)
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{
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}
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//
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// I_FinishUpdate
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//
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void I_FinishUpdate (void)
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{
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int y;
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int x_offset, y_offset, x_offset_end;
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unsigned char *line_in, *line_out;
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/* Offsets in case FB is bigger than DOOM */
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/* 600 = fb heigt, 200 screenheight */
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/* 600 = fb heigt, 200 screenheight */
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/* 2048 =fb width, 320 screenwidth */
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y_offset = (((fb.yres - (SCREENHEIGHT * fb_scaling)) * fb.bits_per_pixel/8)) / 2;
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x_offset = (((fb.xres - (SCREENWIDTH * fb_scaling)) * fb.bits_per_pixel/8)) / 2; // XXX: siglent FB hack: /4 instead of /2, since it seems to handle the resolution in a funny way
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//x_offset = 0;
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x_offset_end = ((fb.xres - (SCREENWIDTH * fb_scaling)) * fb.bits_per_pixel/8) - x_offset;
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/* DRAW SCREEN */
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line_in = (unsigned char *) I_VideoBuffer;
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line_out = (unsigned char *) I_VideoBuffer_FB;
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y = SCREENHEIGHT;
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while (y--)
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{
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int i;
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for (i = 0; i < fb_scaling; i++) {
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line_out += x_offset;
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#ifdef CMAP256
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for (fb_scaling == 1) {
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memcpy(line_out, line_in, SCREENWIDTH); /* fb_width is bigger than Doom SCREENWIDTH... */
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} else {
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//XXX FIXME fb_scaling support!
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}
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#else
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//cmap_to_rgb565((void*)line_out, (void*)line_in, SCREENWIDTH);
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cmap_to_fb((void*)line_out, (void*)line_in, SCREENWIDTH);
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#endif
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line_out += (SCREENWIDTH * fb_scaling * (fb.bits_per_pixel/8)) + x_offset_end;
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}
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line_in += SCREENWIDTH;
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}
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/* Start drawing from y-offset */
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lseek(fd_fb, y_offset * fb.xres, SEEK_SET);
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write(fd_fb, I_VideoBuffer_FB, (SCREENHEIGHT * fb_scaling * (fb.bits_per_pixel/8)) * fb.xres); /* draw only portion used by doom + x-offsets */
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}
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//
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// I_ReadScreen
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//
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void I_ReadScreen (byte* scr)
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{
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memcpy (scr, I_VideoBuffer, SCREENWIDTH * SCREENHEIGHT);
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}
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//
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// I_SetPalette
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//
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#define GFX_RGB565(r, g, b) ((((r & 0xF8) >> 3) << 11) | (((g & 0xFC) >> 2) << 5) | ((b & 0xF8) >> 3))
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#define GFX_RGB565_R(color) ((0xF800 & color) >> 11)
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#define GFX_RGB565_G(color) ((0x07E0 & color) >> 5)
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#define GFX_RGB565_B(color) (0x001F & color)
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void I_SetPalette (byte* palette)
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{
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int i;
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//col_t* c;
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//for (i = 0; i < 256; i++)
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//{
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// c = (col_t*)palette;
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// rgb565_palette[i] = GFX_RGB565(gammatable[usegamma][c->r],
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// gammatable[usegamma][c->g],
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// gammatable[usegamma][c->b]);
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// palette += 3;
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//}
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/* performance boost:
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* map to the right pixel format over here! */
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for (i=0; i<256; ++i ) {
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colors[i].a = 0;
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colors[i].r = gammatable[usegamma][*palette++];
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colors[i].g = gammatable[usegamma][*palette++];
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colors[i].b = gammatable[usegamma][*palette++];
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}
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/* Set new color map in kernel framebuffer driver */
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//XXX FIXME ioctl(fd_fb, IOCTL_FB_PUTCMAP, colors);
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}
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// Given an RGB value, find the closest matching palette index.
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int I_GetPaletteIndex (int r, int g, int b)
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{
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int best, best_diff, diff;
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int i;
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col_t color;
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printf("I_GetPaletteIndex\n");
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best = 0;
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best_diff = INT_MAX;
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for (i = 0; i < 256; ++i)
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{
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color.r = GFX_RGB565_R(rgb565_palette[i]);
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color.g = GFX_RGB565_G(rgb565_palette[i]);
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color.b = GFX_RGB565_B(rgb565_palette[i]);
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diff = (r - color.r) * (r - color.r)
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+ (g - color.g) * (g - color.g)
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+ (b - color.b) * (b - color.b);
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if (diff < best_diff)
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{
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best = i;
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best_diff = diff;
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}
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if (diff == 0)
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{
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break;
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}
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}
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return best;
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}
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void I_BeginRead (void)
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{
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}
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void I_EndRead (void)
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{
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}
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void I_SetWindowTitle (char *title)
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{
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}
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void I_GraphicsCheckCommandLine (void)
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{
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}
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|
|
|
void I_SetGrabMouseCallback (grabmouse_callback_t func)
|
|
{
|
|
}
|
|
|
|
void I_EnableLoadingDisk(void)
|
|
{
|
|
}
|
|
|
|
void I_BindVideoVariables (void)
|
|
{
|
|
}
|
|
|
|
void I_DisplayFPSDots (boolean dots_on)
|
|
{
|
|
}
|
|
|
|
void I_CheckIsScreensaver (void)
|
|
{
|
|
}
|