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display.h
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display.h
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/* display.h: Routines for printing the Spectrum's screen
Copyright (c) 1999-2006 Philip Kendall
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#ifndef FUSE_DISPLAY_H
#define FUSE_DISPLAY_H
#include <stddef.h>
#include <libspectrum.h>
// The width and height of the Speccy's screen
#define DISPLAY_WIDTH_COLS 32
#define DISPLAY_HEIGHT_ROWS 24
// The width and height of the Speccy's screen
// Each main screen column can produce 16 pixels in hires mode
#define DISPLAY_WIDTH (DISPLAY_WIDTH_COLS * 16)
// Each main screen row can produce only 8 pixels in any mode
#define DISPLAY_HEIGHT (DISPLAY_HEIGHT_ROWS * 8)
// The width and height of the (emulated) border
#define DISPLAY_BORDER_WIDTH_COLS 4
#define DISPLAY_BORDER_HEIGHT_COLS 3
// The width and height of the (emulated) border
// Each main screen column can produce 16 pixels in hires mode
#define DISPLAY_BORDER_WIDTH (DISPLAY_BORDER_WIDTH_COLS * 16)
// Aspect corrected border width
#define DISPLAY_BORDER_ASPECT_WIDTH (DISPLAY_BORDER_WIDTH_COLS * 8)
// Each main screen row can produce only 8 pixels in any mode
#define DISPLAY_BORDER_HEIGHT (DISPLAY_BORDER_HEIGHT_COLS * 8)
// The width and height of the window we'll be displaying
#define DISPLAY_SCREEN_WIDTH (DISPLAY_WIDTH + 2 * DISPLAY_BORDER_WIDTH)
#define DISPLAY_SCREEN_HEIGHT (DISPLAY_HEIGHT + 2 * DISPLAY_BORDER_HEIGHT)
// And the width in columns
#define DISPLAY_SCREEN_WIDTH_COLS (DISPLAY_WIDTH_COLS + 2 * DISPLAY_BORDER_WIDTH_COLS)
// The aspect ratio corrected display width
#define DISPLAY_ASPECT_WIDTH (DISPLAY_SCREEN_WIDTH / 2)
extern int display_ui_initialised;
extern libspectrum_byte display_lores_border;
extern libspectrum_byte display_hires_border;
extern libspectrum_dword
display_last_screen[DISPLAY_SCREEN_WIDTH_COLS * DISPLAY_SCREEN_HEIGHT];
// Offsets as to where the data and the attributes for each pixel line start
extern libspectrum_word display_line_start[DISPLAY_HEIGHT];
extern libspectrum_word display_attr_start[DISPLAY_HEIGHT];
typedef struct display_startup_context {
int *argc;
char ***argv;
} display_startup_context;
int display_init(int *argc, char ***argv);
void display_register_startup(display_startup_context *context);
void display_line(void);
typedef void (*display_dirty_fn)(libspectrum_word offset);
// Function to use to mark as 'dirty' the pixels which have been changed by a
// write to 'offset' within the RAM page containing the screen
extern display_dirty_fn display_dirty;
void display_dirty_timex(libspectrum_word offset);
void display_dirty_pentagon_16_col(libspectrum_word offset);
void display_dirty_sinclair(libspectrum_word offset);
typedef void (*display_write_if_dirty_fn)(int x, int y);
// Function to write a dirty 8x1 chunk of pixels to the display
extern display_write_if_dirty_fn display_write_if_dirty;
void display_write_if_dirty_timex(int x, int y);
void display_write_if_dirty_pentagon_16_col(int x, int y);
void display_write_if_dirty_sinclair(int x, int y);
typedef void (*display_dirty_flashing_fn)(void);
// Function to dirty the pixels which are changed by virtue of having a flash attribute
extern display_dirty_flashing_fn display_dirty_flashing;
void display_dirty_flashing_timex(void);
void display_dirty_flashing_pentagon_16_col(void);
void display_dirty_flashing_sinclair(void);
void display_parse_attr(libspectrum_byte attr, libspectrum_byte *ink, libspectrum_byte *paper);
void display_set_lores_border(int colour);
void display_set_hires_border(int colour);
int display_dirty_border(void);
int display_frame(void);
void display_refresh_main_screen(void);
void display_refresh_all(void);
#define display_get_offset(x, y) display_line_start[(y)] + (x)
#define display_get_addr(x, y) \
scld_last_dec.name.altdfile ? display_get_offset((x), (y)) + ALTDFILE_OFFSET : \
display_get_offset((x), (y))
int display_getpixel(int x, int y);
void display_update_critical(int x, int y);
#endif // #ifndef FUSE_DISPLAY_H