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290 lines
11 KiB
C
290 lines
11 KiB
C
/*****************************************************************************/
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/* */
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/* tgi.h */
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/* */
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/* Tiny graphics interface */
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/* */
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/* */
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/* */
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/* (C) 2002-2013, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef _TGI_H
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#define _TGI_H
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#ifndef _TGI_ERROR_H
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#include <tgi/tgi-error.h>
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#endif
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/*****************************************************************************/
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/* Definitions */
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/*****************************************************************************/
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/* Font constants for use with tgi_settextstyle */
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#define TGI_FONT_BITMAP 0
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#define TGI_FONT_VECTOR 1
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/* Direction constants for use with tgi_settextstyle */
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#define TGI_TEXT_HORIZONTAL 0
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#define TGI_TEXT_VERTICAL 1
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/* The name of the standard tgi driver for a platform */
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extern const char tgi_stddrv[];
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/* The address of the static standard tgi driver for a platform */
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extern const void tgi_static_stddrv[];
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/* A vector font definition */
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typedef struct tgi_vectorfont tgi_vectorfont;
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/*****************************************************************************/
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/* Functions */
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/*****************************************************************************/
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void __fastcall__ tgi_load_driver (const char* name);
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/* Load and install the given driver. */
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void tgi_unload (void);
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/* Uninstall, then unload the currently loaded driver. Will call tgi_done if
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** necessary.
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*/
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void __fastcall__ tgi_install (void* driver);
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/* Install an already loaded driver. */
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void tgi_uninstall (void);
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/* Uninstall the currently loaded driver but do not unload it. Will call
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** tgi_done if necessary.
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*/
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void tgi_init (void);
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/* Initialize the already loaded graphics driver. */
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void tgi_done (void);
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/* End graphics mode, switch back to text mode. Will NOT uninstall or unload
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** the driver!
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*/
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const tgi_vectorfont* __fastcall__ tgi_load_vectorfont (const char* name);
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/* Load a vector font into memory and return it. In case of errors, NULL is
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** returned and an error is set, which can be retrieved using tgi_geterror.
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** To use the font, it has to be installed using tgi_install_vectorfont.
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*/
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void __fastcall__ tgi_install_vectorfont (const tgi_vectorfont* font);
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/* Install a vector font for use. More than one vector font can be loaded,
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** but only one can be active. This function is used to tell which one. Call
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** with a NULL pointer to uninstall the currently installed font.
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*/
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void __fastcall__ tgi_free_vectorfont (const tgi_vectorfont* font);
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/* Free a vector font that was previously loaded into memory. */
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unsigned char tgi_geterror (void);
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/* Return the error code for the last operation. This will also clear the
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** error.
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*/
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const char* __fastcall__ tgi_geterrormsg (unsigned char code);
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/* Get an error message describing the error in code. */
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void tgi_clear (void);
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/* Clear the drawpage. */
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unsigned tgi_getpagecount (void);
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/* Returns the number of screen pages available. */
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void __fastcall__ tgi_setviewpage (unsigned char page);
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/* Set the visible page. Will set an error if the page is not available. */
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void __fastcall__ tgi_setdrawpage (unsigned char page);
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/* Set the drawable page. Will set an error if the page is not available. */
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unsigned char tgi_getcolorcount (void);
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/* Get the number of available colors. */
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unsigned char tgi_getmaxcolor (void);
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/* Return the maximum supported color number (the number of colors would
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** then be getmaxcolor()+1).
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*/
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void __fastcall__ tgi_setcolor (unsigned char color);
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/* Set the current drawing color. */
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unsigned char tgi_getcolor (void);
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/* Return the current drawing color. */
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void __fastcall__ tgi_setpalette (const unsigned char* palette);
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/* Set the palette (not available with all drivers/hardware). palette is
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** a pointer to as many entries as there are colors.
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*/
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const unsigned char* tgi_getpalette (void);
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/* Return the current palette. */
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const unsigned char* tgi_getdefpalette (void);
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/* Return the default palette. */
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unsigned tgi_getxres (void);
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/* Return the resolution in X direction. */
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unsigned tgi_getmaxx (void);
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/* Return the maximum x coordinate. The resolution in x direction is
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** getmaxx() + 1
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*/
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unsigned tgi_getyres (void);
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/* Return the resolution in Y direction. */
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unsigned tgi_getmaxy (void);
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/* Return the maximum y coordinate. The resolution in y direction is
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** getmaxy() + 1
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*/
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unsigned tgi_getaspectratio (void);
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/* Returns the aspect ratio for the loaded driver. The aspect ratio is an
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** 8.8 fixed point value.
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*/
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void __fastcall__ tgi_setaspectratio (unsigned aspectratio);
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/* Set a new aspect ratio for the loaded driver. The aspect ratio is an
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** 8.8 fixed point value.
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*/
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unsigned char __fastcall__ tgi_getpixel (int x, int y);
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/* Get the color value of a pixel. */
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void __fastcall__ tgi_setpixel (int x, int y);
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/* Plot a pixel in the current drawing color. */
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void __fastcall__ tgi_gotoxy (int x, int y);
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/* Set the graphics cursor to the given position. */
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void __fastcall__ tgi_line (int x1, int y1, int x2, int y2);
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/* Draw a line in the current drawing color. The graphics cursor will
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** be set to x2/y2 by this call.
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*/
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void __fastcall__ tgi_lineto (int x2, int y2);
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/* Draw a line in the current drawing color from the graphics cursor to the
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** new end point. The graphics cursor will be updated to x2/y2.
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*/
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void __fastcall__ tgi_circle (int x, int y, unsigned char radius);
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/* Draw a circle in the current drawing color. */
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void __fastcall__ tgi_ellipse (int x, int y, unsigned char rx, unsigned char ry);
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/* Draw a full ellipse with center at x/y and radii rx/ry using the current
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** drawing color.
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*/
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void __fastcall__ tgi_arc (int x, int y, unsigned char rx, unsigned char ry,
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unsigned sa, unsigned ea);
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/* Draw an ellipse arc with center at x/y and radii rx/ry using the current
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** drawing color. The arc covers the angle between sa and ea (startangle and
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** endangle), which must be in the range 0..360 (otherwise the function may
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** bevave unextectedly).
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*/
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void __fastcall__ tgi_pieslice (int x, int y, unsigned char rx, unsigned char ry,
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unsigned sa, unsigned ea);
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/* Draw an ellipse pie slice with center at x/y and radii rx/ry using the
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** current drawing color. The pie slice covers the angle between sa and ea
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** (startangle and endangle), which must be in the range 0..360 (otherwise the
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** function may behave unextectedly).
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*/
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void __fastcall__ tgi_bar (int x1, int y1, int x2, int y2);
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/* Draw a bar (a filled rectangle) using the current color. */
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void __fastcall__ tgi_settextdir (unsigned char dir);
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/* Set the direction for text output. dir is one of the TGI_TEXT_XXX
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** constants.
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*/
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void __fastcall__ tgi_settextscale (unsigned width, unsigned height);
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/* Set the scaling for text output. The scaling factors for width and height
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** are 8.8 fixed point values. This means that $100 = 1 $200 = 2 etc.
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*/
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void __fastcall__ tgi_settextstyle (unsigned width, unsigned height,
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unsigned char dir, unsigned char font);
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/* Set the style for text output. The scaling factors for width and height
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** are 8.8 fixed point values. This means that $100 = 1 $200 = 2 etc.
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** dir is one of the TGI_TEXT_XXX constants. font is one of the TGI_FONT_XXX
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** constants.
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*/
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unsigned __fastcall__ tgi_gettextwidth (const char* s);
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/* Calculate the width of the text in pixels according to the current text
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** style.
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*/
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unsigned __fastcall__ tgi_gettextheight (const char* s);
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/* Calculate the height of the text in pixels according to the current text
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** style.
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*/
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void __fastcall__ tgi_outtext (const char* s);
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/* Output text at the current graphics cursor position. The graphics cursor
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** is moved to the end of the text.
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*/
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void __fastcall__ tgi_outtextxy (int x, int y, const char* s);
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/* Output text at the given cursor position. The graphics cursor is moved to
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** the end of the text.
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*/
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unsigned __fastcall__ tgi_ioctl (unsigned char code, void* data);
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/* Call the driver specific control function. What this function does for
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** a specific code depends on the driver. The driver will set an error
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** for unknown codes or values.
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*/
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int __fastcall__ tgi_imulround (int rhs, int lhs);
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/* Helper function for functions using sine/cosine: Multiply two values, one
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** being an 8.8 fixed point one, and return the rounded and scaled result.
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*/
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/* End of tgi.h */
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#endif
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