kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
157 wiersze
4.4 KiB
C
157 wiersze
4.4 KiB
C
//
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// Copyright(C) 1993-1996 Id Software, Inc.
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// Copyright(C) 2005-2014 Simon Howard
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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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// DESCRIPTION:
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// System specific interface stuff.
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//
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#ifndef __I_VIDEO__
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#define __I_VIDEO__
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#include "doomtype.h"
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// Screen width and height.
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#define SCREENWIDTH 320
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#define SCREENHEIGHT 200
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// Screen width used for "squash" scale functions
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#define SCREENWIDTH_4_3 256
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// Screen height used for "stretch" scale functions.
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#define SCREENHEIGHT_4_3 240
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#define MAX_MOUSE_BUTTONS 8
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typedef struct
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{
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// Screen width and height
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int width;
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int height;
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// Initialisation function to call when using this mode.
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// Called with a pointer to the Doom palette.
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//
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// If NULL, no init function is called.
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void (*InitMode)(byte *palette);
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// Function to call to draw the screen from the source buffer.
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// Return true if draw was successful.
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boolean (*DrawScreen)(int x1, int y1, int x2, int y2);
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// If true, this is a "poor quality" mode. The autoadjust
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// code should always attempt to use a different mode to this
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// mode in fullscreen.
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//
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// Some notes about what "poor quality" means in this context:
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//
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// The aspect ratio correction works by scaling up to the larger
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// screen size and then drawing pixels on the edges between the
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// "virtual" pixels so that an authentic blocky look-and-feel is
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// achieved.
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//
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// For a mode like 640x480, you can imagine the grid of the
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// "original" pixels spaced out, with extra "blurry" pixels added
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// in the space between them to fill it out. However, when you're
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// running at a resolution like 320x240, this is not the case. In
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// the small screen case, every single pixel has to be a blurry
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// interpolation of two pixels from the original image.
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//
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// If you run in 320x240 and put your face up close to the screen
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// you can see this: it's particularly visible in the small yellow
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// status bar numbers for example. Overall it still looks "okay"
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// but there's an obvious - albeit small - deterioration in
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// quality.
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//
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// Once you get to 640x480, all the original pixels are there at
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// least once and it's okay (the higher the resolution, the more
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// accurate it is). When I first wrote the code I was expecting
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// that even higher resolutions would be needed before it would
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// look acceptable, but it turned out to be okay even at 640x480.
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boolean poor_quality;
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} screen_mode_t;
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typedef boolean (*grabmouse_callback_t)(void);
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// Called by D_DoomMain,
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// determines the hardware configuration
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// and sets up the video mode
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void I_InitGraphics (void);
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void I_GraphicsCheckCommandLine(void);
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void I_ShutdownGraphics(void);
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// Takes full 8 bit values.
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void I_SetPalette (byte* palette);
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int I_GetPaletteIndex(int r, int g, int b);
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void I_UpdateNoBlit (void);
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void I_FinishUpdate (void);
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void I_ReadScreen (byte* scr);
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void I_BeginRead (void);
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void I_EndRead (void);
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void I_SetWindowTitle(char *title);
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void I_CheckIsScreensaver(void);
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void I_SetGrabMouseCallback(grabmouse_callback_t func);
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void I_DisplayFPSDots(boolean dots_on);
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void I_BindVideoVariables(void);
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void I_InitWindowTitle(void);
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void I_InitWindowIcon(void);
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// Called before processing any tics in a frame (just after displaying a frame).
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// Time consuming syncronous operations are performed here (joystick reading).
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void I_StartFrame (void);
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// Called before processing each tic in a frame.
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// Quick syncronous operations are performed here.
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void I_StartTic (void);
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// Enable the loading disk image displayed when reading from disk.
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void I_EnableLoadingDisk(void);
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extern char *video_driver;
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extern boolean screenvisible;
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extern float mouse_acceleration;
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extern int mouse_threshold;
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extern int vanilla_keyboard_mapping;
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extern boolean screensaver_mode;
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extern int usegamma;
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extern byte *I_VideoBuffer;
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extern int screen_width;
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extern int screen_height;
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extern int screen_bpp;
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extern int fullscreen;
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extern int aspect_ratio_correct;
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#endif
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