Alternative library and kernel for add-in development on fx-9860G and fx-CG50 under Linux.
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//---
// gint:display-fx - fx9860g drawing functions
//
// This module is in charge of all monochrome rendering. The gray engine
// has its own functions, but often relies on this module (because the
// gray effect is created through two monochrome buffers).
//---
#ifndef GINT_DISPLAY_FX
#define GINT_DISPLAY_FX
#ifdef FX9860G
#include <gint/defs/types.h>
/* Dimensions of the VRAM */
#define DWIDTH 128
#define DHEIGHT 64
/* gint VRAM address. This value must always point to a 4-aligned buffer of
size 1024. Any function can use it freely to:
- Use another video ram area (triple buffering or more, gray engine);
- Implement additional drawing functions;
- Store data when not drawing. */
extern uint32_t *gint_vram;
/* color_t - colors available for drawing
The following colors are defined by the library:
OPAQUE COLORS (override existing pixels)
white, black - the usual thing
light, dark - intermediate colors used with the gray engine
OPERATORS (combine with existing pixels)
none - leaves unchanged
invert - inverts white <-> black, light <-> dark
lighten - shifts black -> dark -> light -> white -> white
darken - shifts white -> light -> dark -> black -> black
Not all colors can be used with all functions. To avoid ambiguities, all
functions explicitly indicate compatible colors. */
typedef enum
{
/* Opaque colors */
C_WHITE = 0,
C_LIGHT = 1,
C_DARK = 2,
C_BLACK = 3,
/* Monochrome operators */
C_NONE = 4,
C_INVERT = 5,
/* Gray operators */
C_LIGHTEN = 6,
C_DARKEN = 7,
} color_t;
//---
// Image rendering (bopti)
//---
/* image_t - image files encoded for bopti
This format is the result of encoding images for bopti with the fxSDK's
[fxconv] tool. The bopti routines can render it extremely fast, which makes
it preferable over plain bitmaps if the images are never edited. */
typedef struct
{
/* Image can only be rendered with the gray engine */
uint gray :1;
/* Left for future use */
uint :3;
/* Image profile (uniquely identifies a rendering function) */
uint profile :4;
/* Full width, in pixels */
uint width :12;
/* Full height, in pixels */
uint height :12;
/* Raw layer data */
uint8_t data[];
} GPACKED(4) image_t;
#endif /* FX9860G */
#endif /* GINT_DISPLAY_FX */