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/*
3ds81 - Nintendo 3DS ZX81 emulator.
Copyright (C) 2021 Ian Cowburn <ianc@noddybox.co.uk>
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 3
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, see <http://www.gnu.org/licenses/>.
$Id: framebuffer.h 43 2007-03-12 00:59:51Z ianc $
*/
#ifndef DS81_FRAMEBUFFER_H
#define DS81_FRAMEBUFFER_H
#include <3ds.h>
/* Predefined colours.
*/
typedef enum
{
COL_TRANSPARENT = -1,
COL_BLACK = 0,
COL_WHITE = 1,
COL_RED = 2,
COL_GREEN = 3,
COL_BLUE = 4,
COL_GUISELECT = 5,
COL_GREY = 6,
COL_LIGHTGREY = 7,
COL_DARKGREY = 8,
COL_YELLOW = 9
} FB_Colour;
/* Predefined images
*/
typedef enum
{
IMG_CITY_PATROL_INLAY,
IMG_3D_MONSTER_MAZE_INLAY,
IMG_SABOTAGE_INLAY,
IMG_MAZOGS_INLAY,
IMG_KEYBOARD,
IMG_SPLASH
} FB_Image;
/* A framebuffer or image
*/
typedef struct
{
u16 *buffer;
u16 width;
u16 height;
} Framebuffer;
/* Macro to get the address of a framebuffer pixel
*/
#define FB_ADDR(fb,x,y) (fb)->buffer[(x) * (fb)->height + (y)]
/* Macro to plot a framebuffer pixel safely clippped
*/
#define FB_PLOT_CLIPPED(fb,x,y,c) \
do \
{ \
if ((x) >= 0 && (x) < (fb)->width &&\
(y) >= 0 && (y) < (fb)->height) \
{ \
FB_ADDR(fb, x, y) = c; \
} \
} while(0)
/* Initialise framebuffer code.
*/
void FB_Init(void);
/* Start a frame and setup the framebuffers. This can be called multiple times
per frame. Either pointer can be NULL if you're not interested in it.
*/
void FB_StartFrame(Framebuffer *upper, Framebuffer *lower);
/* Convenience function to flush the framebuffers, wait for a vsync and scan
HID input
*/
void FB_EndFrame(void);
/* Get the encoded value for a colour
*/
u16 FB_GetColour(FB_Colour col);
/* Print the text into the framebuffer. The text is inverted if the character
'\001' is found.
*/
void FB_Print(Framebuffer *fb, const char *text, int x, int y,
FB_Colour colour, FB_Colour paper);
void FB_Centre(Framebuffer *fb, const char *text, int y,
FB_Colour colour, FB_Colour paper);
void FB_printf(Framebuffer *fb, int x, int y,
FB_Colour colour, FB_Colour paper, const char *format, ...);
/* Lines and boxes.
*/
void FB_HLine(Framebuffer *fb, u16 x1, u16 x2, u16 y, FB_Colour colour);
void FB_VLine(Framebuffer *fb, u16 x, u16 y1, u16 y2, FB_Colour colour);
void FB_Box(Framebuffer *fb, u16 x, u16 y, u16 w, u16 h, FB_Colour colour);
void FB_FillBox(Framebuffer *fb, u16 x, u16 y, u16 w, u16 h,
FB_Colour colour);
/* Clear to colour
*/
void FB_Clear(Framebuffer *fb, FB_Colour col);
/* Draw the image.
*/
void FB_Blit(Framebuffer *fb, FB_Image img, u16 x, u16 y);
#endif /* DS81_FRAMEBUFFER_H */
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