<sect1><tt/tgi.h/<label id="tgi.h"><p>
-<itemize>
-<item><ref id="tgi_arc" name="tgi_arc">
-<item><ref id="tgi_bar" name="tgi_bar">
-<item><ref id="tgi_circle" name="tgi_circle">
-<item><ref id="tgi_clear" name="tgi_clear">
-<item><ref id="tgi_done" name="tgi_done">
-<item><ref id="tgi_ellipse" name="tgi_ellipse">
-<item><ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
-<item><ref id="tgi_getaspectratio" name="tgi_getaspectratio">
-<item><ref id="tgi_getcolor" name="tgi_getcolor">
-<item><ref id="tgi_getcolorcount" name="tgi_getcolorcount">
-<item><ref id="tgi_getdefpalette" name="tgi_getdefpalette">
-<item><ref id="tgi_geterror" name="tgi_geterror">
-<item><ref id="tgi_geterrormsg" name="tgi_geterrormsg">
-<item><ref id="tgi_getmaxcolor" name="tgi_getmaxcolor">
-<item><ref id="tgi_getmaxx" name="tgi_getmaxx">
-<item><ref id="tgi_getmaxy" name="tgi_getmaxy">
-<item><ref id="tgi_getpagecount" name="tgi_getpagecount">
-<item><ref id="tgi_getpalette" name="tgi_getpalette">
-<item><ref id="tgi_getpixel" name="tgi_getpixel">
-<item><ref id="tgi_gettextheight" name="tgi_gettextheight">
-<item><ref id="tgi_gettextwidth" name="tgi_gettextwidth">
-<item><ref id="tgi_getxres" name="tgi_getxres">
-<item><ref id="tgi_getyres" name="tgi_getyres">
-<item><ref id="tgi_gotoxy" name="tgi_gotoxy">
-<item><ref id="tgi_init" name="tgi_init">
-<item><ref id="tgi_install" name="tgi_install">
-<item><ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">
-<item><ref id="tgi_ioctl" name="tgi_ioctl">
-<item><ref id="tgi_line" name="tgi_line">
-<item><ref id="tgi_lineto" name="tgi_lineto">
-<item><ref id="tgi_load_driver" name="tgi_load_driver">
-<item><ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">
-<item><ref id="tgi_outtext" name="tgi_outtext">
-<item><ref id="tgi_outtextxy" name="tgi_outtextxy">
-<item><ref id="tgi_setaspectratio" name="tgi_setaspectratio">
-<item><ref id="tgi_setcolor" name="tgi_setcolor">
-<item><ref id="tgi_setdrawpage" name="tgi_setdrawpage">
-<item><ref id="tgi_setpalette" name="tgi_setpalette">
-<item><ref id="tgi_setpixel" name="tgi_setpixel">
-<item><ref id="tgi_setviewpage" name="tgi_setviewpage">
-<item><ref id="tgi_settextscale" name="tgi_settextscale">
-<item><ref id="tgi_settextstyle" name="tgi_settextstyle">
-<item><ref id="tgi_uninstall" name="tgi_uninstall">
-<item><ref id="tgi_unload" name="tgi_unload">
-</itemize>
+<url url="tgi.html" name="Tiny Graphics Interface">.
+
<sect1><tt/time.h/<label id="time.h"><p>
</quote>
-<sect1>tgi_arc<label id="tgi_arc"><p>
-
-<quote>
-<descrip>
-<tag/Function/Draw an elliptic arc in the current color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_arc (int x, int y,
-unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
-<tag/Description/The function draws an elliptic arc with center at x/y and
-radii rx/ry using the current drawing color. The arc covers the angle
-between sa and ea (startangle and endangle), which must be in the range
-0..360.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-<item>The function behaves unexpectedly or may crash if the angles are out
-of range.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_bar" name="tgi_bar">,
-<ref id="tgi_circle" name="tgi_circle">,
-<ref id="tgi_ellipse" name="tgi_ellipse">,
-<ref id="tgi_pieslice" name="tgi_pieslice">,
-<ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
-/* Draw the upper half of an ellipse */
-tgi_setcolor(TGI_COLOR_BLUE);
-tgi_arc (50, 50, 40, 20, 0, 180);
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_bar<label id="tgi_bar"><p>
-
-<quote>
-<descrip>
-<tag/Function/The function fills a rectangle on the drawpage with the current
-color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_bar (int x1, int y1, int x2, int y2);/
-<tag/Description/The function fills a rectangle on the drawpage with the current
-color.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi function
-<tag/Example/<verb>
-tgi_setcolor(TGI_COLOR_GREEN);
-tgi_bar(10, 10, 100, 60);
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_circle<label id="tgi_circle"><p>
-
-<quote>
-<descrip>
-<tag/Function/The function draws a circle in the current color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_circle (int x, int y, unsigned char radius);/
-<tag/Description/The function draws a circle in the current color.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_arc" name="tgi_arc">,
-<ref id="tgi_bar" name="tgi_bar">,
-<ref id="tgi_ellipse" name="tgi_ellipse">,
-<ref id="tgi_pieslice" name="tgi_pieslice">,
-<ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
-tgi_setcolor(TGI_COLOR_BLACK);
-tgi_circle(50, 40, 40);
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_clear<label id="tgi_clear"><p>
-
-<quote>
-<descrip>
-<tag/Function/Clear the drawpage
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void tgi_clear (void);/
-<tag/Description/Clear the drawpage
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_done<label id="tgi_done"><p>
-
-<quote>
-<descrip>
-<tag/Function/End graphics mode, switch back to text mode.
-Will NOT uninstall or unload the driver!
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void tgi_done (void);/
-<tag/Description/End graphics mode, switch back to text mode.
-Will NOT uninstall or unload the driver!
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_ellipse<label id="tgi_ellipse"><p>
-
-<quote>
-<descrip>
-<tag/Function/The function draws an ellipse in the current color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_ellipse (int x, int y, unsigned char rx, unsigned char ry);/
-<tag/Description/The function draws an ellipse at position x/y with radii
-rx and ry, using the current drawing color.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_arc" name="tgi_arc">,
-<ref id="tgi_bar" name="tgi_bar">,
-<ref id="tgi_circle" name="tgi_circle">,
-<ref id="tgi_pieslice" name="tgi_pieslice">,
-<ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
-tgi_setcolor(TGI_COLOR_RED);
-tgi_ellipse (50, 40, 40, 20);
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_free_vectorfont<label id="tgi_free_vectorfont"><p>
-
-<quote>
-<descrip>
-<tag/Function/Free a vector font that was previously loaded into memory.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_free_vectorfont (const tgi_vectorfont* font);/
-<tag/Description/Free a vector font that was previously loaded into memory.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">,
-<ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getaspectratio<label id="tgi_getaspectratio"><p>
-
-<quote> <descrip> <tag/Function/Return the pixel aspect ratio.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getaspectratio (void);/
-<tag/Description/The function returns the pixel aspect ratio for the current
-driver and display as an 8.8 fixed point value. It may be used to correct
-geometric shapes so they look correct on the display. As an example, a circle
-with a radius of 100 pixels may look elliptic on some driver/display
-combinations if the aspect ratio is not 1.00.
-<tag/Notes/<itemize>
-<item>The aspect ratio is encoded in the TGI driver which assumes a "standard"
-monitor for the given platform. The aspect ratio may be wrong if another
-monitor is used.
-<item>No TGI function will use the aspect ratio. It is up to the programmer to
-make use of it.
-<item>The <ref id="tgi_setaspectratio" name="tgi_setaspectratio"> function can
-be used to change the aspect ratio for a loaded driver. The value is not reset
-by <ref id="tgi_init" name="tgi_init">, so if a driver is linked statically to
-an application, switching into and out of graphics mode will not restore the
-original aspect ratio.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_setaspectratio" name="tgi_setaspectratio">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getcolor<label id="tgi_getcolor"><p>
-
-<quote>
-<descrip>
-<tag/Function/Return the current drawing color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char tgi_getcolor (void);/
-<tag/Description/The actual color is an index to a palette. During tgi_init
-you will get a default palette. The number of colors depend on the platform.
-All platforms recognize at least TGI_COLOR_BLACK and TGI_COLOR_WHITE. But some
-platforms have many more predefined colors. If you paint using TGI_COLOR_GREEN
-and then you change the green of the palette to blue using tgi_setpalette then
-after this painting in TGI_COLOR_GREEN will actually be blue.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/<verb>
-color = tgi_getcolor();
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_getcolorcount<label id="tgi_getcolorcount"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the number of available colors.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char tgi_getcolorcount (void);/
-<tag/Description/Tgi platforms use indexed color palettes. This function
-returns the number of entries we can use in the palette.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/<verb>
-if (tgi_getcolorcount() == 2) {
- printf("Only monochrome graphics is supported\n");
-}
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_getdefpalette<label id="tgi_getdefpalette"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the palette installed by default.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/const unsigned char* tgi_getdefpalette (void);/
-<tag/Description/The tgi driver has a default palette that is active at startup.
-The named colors TGI_COLOR_BLACK, TGI_COLOR_WHITE, TGI_COLOR_RED... need this
-palette to work correctly.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_geterror<label id="tgi_geterror"><p>
-
-<quote>
-<descrip>
-<tag/Function/Return the error code for the last operation.
-This will also clear the error.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char tgi_geterror (void);/
-<tag/Description/Return the error code for the last operation.
-This will also clear the error.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_geterrormsg<label id="tgi_geterrormsg"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get an error message describing the error.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/const char* __fastcall__ tgi_geterrormsg (unsigned char code);/
-<tag/Description/Get an error message describing the error.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getmaxcolor<label id="tgi_getmaxcolor"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the highest index of the palette.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char tgi_getmaxcolor (void);/
-<tag/Description/Get the highest index of the palette.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getmaxx<label id="tgi_getmaxx"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the maximum x coordinate that can be used on this screen.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getmaxx (void);/
-<tag/Description/Get the maximum x coordinate that can be used on this screen.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getmaxy<label id="tgi_getmaxy"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the maximum y coordinate that can be used on this screen.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getmaxy (void);/
-<tag/Description/Get the maximum y coordinate that can be used on this screen.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getpagecount<label id="tgi_getpagecount"><p>
-
-<quote>
-<descrip>
-<tag/Function/Return the number of screen pages available.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getpagecount (void);/
-<tag/Description/Return the number of screen pages available.
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_setdrawpage" name="tgi_setdrawpage">,
-<ref id="tgi_setviewpage" name="tgi_setviewpage">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getpalette<label id="tgi_getpalette"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the palette installed.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/const unsigned char* tgi_getpalette (void);/
-<tag/Description/Get the palette installed.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getpixel<label id="tgi_getpixel"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get the color of a pixel from the viewpage.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char __fastcall__ tgi_getpixel (int x, int y);/
-<tag/Description/Get the color of a pixel from the viewpage.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getxres<label id="tgi_getxres"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get number of horisontal pixels on the screen.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getxres (void);/
-<tag/Description/Get number of horisontal pixels on the screen.
-This is same as tgi_maxx()+1.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_getyres<label id="tgi_getyres"><p>
-
-<quote>
-<descrip>
-<tag/Function/Get number of vertical pixels on the screen.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned tgi_getyres (void);/
-<tag/Description/Get number of vertical pixels on the screen.
-This is same as tgi_maxy()+1.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_gotoxy<label id="tgi_gotoxy"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set graphics cursor at x, y.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_gotoxy (int x, int y);/
-<tag/Description/Set graphics cursor at x, y.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_init<label id="tgi_init"><p>
-
-<quote>
-<descrip>
-<tag/Function/Initialize the already loaded graphics driver.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void tgi_init (void);/
-<tag/Description/The tgi_init function will set the default palette to the
-hardware.
-<tag/Notes/<itemize>
-<item><tt/tgi_init/ will not clear the screen. This allows switching between
-text and graphics mode on platforms that have separate memory areas for the
-screens. If you want the screen cleared, call <tt/<ref id="tgi_clear"
-name="tgi_clear">/ after <tt/tgi_init/.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/<verb>
-tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
-tgi_init(); //Set up the default palette and clear the screen.
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_install<label id="tgi_install"><p>
-
-<quote>
-<descrip>
-<tag/Function/Install an already loaded driver and return an error code.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned char __fastcall__ tgi_install (void* driver);/
-<tag/Description/The function installs a driver that was already loaded into
-memory (or linked statically to the program). It returns an error code
-(<tt/TGI_ERR_OK/ in case of success).
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only be
-used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_load_driver" name="tgi_load_driver">,
-<ref id="tgi_uninstall" name="tgi_uninstall">,
-<ref id="tgi_unload" name="tgi_unload">
-<tag/Example/<verb>
-tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
-tgi_init(); //Set up the default palette and clear the screen.
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_install_vectorfont<label id="tgi_install_vectorfont"><p>
-
-<quote>
-<descrip>
-<tag/Function/Install an already loaded driver and return an error code.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_install_vectorfont (const tgi_vectorfont* font);/
-<tag/Description/
-Install a vector font for use. More than one vector font can be loaded,
-but only one can be active. This function is used to tell which one. Call
-with a NULL pointer to uninstall the currently installed font.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only be
-used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">,
-<ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_ioctl<label id="tgi_ioctl"><p>
-
-<quote>
-<descrip>
-<tag/Function/Platform dependent code extensions.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned __fastcall__ tgi_ioctl (unsigned char code, void* data);/
-<tag/Description/Some platforms have extra display hardware that is not
-supported by standard tgi functions. You can extend the driver to support
-this extra hardware using tgi_ioctl functions.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-<item>These functions are not easily portable to other cc65 platforms.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/<verb>
-#define tgi_sprite(spr) tgi_ioctl(0, (void*)(spr))
-#define tgi_flip() tgi_ioctl(1, (void*)0)
-#define tgi_setbgcolor(bgcol) tgi_ioctl(2, (void*)(bgcol))
-#define tgi_setframerate(rate) tgi_ioctl(3, (void*)(rate))
-#define tgi_busy() tgi_ioctl(4, (void*)0)
-#define tgi_updatedisplay() tgi_ioctl(4, (void*)1)
-if (!tgi_busy()) {
- tgi_sprite(&background);
- tgi_setcolor(TGI_COLOR_BLUE);
- tgi_outttextxy(20,40,"Hello World");
- tgi_updatedisplay();
-}
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_line<label id="tgi_line"><p>
-
-<quote>
-<descrip>
-<tag/Function/Draw a line in the current drawing color.
-The graphics cursor will be set to x2/y2 by this call.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_line (int x1, int y1, int x2, int y2);/
-<tag/Description/Draw a line in the current drawing color.
-The graphics cursor will be set to x2/y2 by this call.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_lineto<label id="tgi_lineto"><p>
-
-<quote>
-<descrip>
-<tag/Function/Draw a line in the current drawing color from the graphics
-cursor to the new end point. The graphics cursor will be updated to x2/y2.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_lineto (int x2, int y2);/
-<tag/Description/Draw a line in the current drawing color from the graphics
-cursor to the new end point. The graphics cursor will be updated to x2/y2.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_load_driver<label id="tgi_load_driver"><p>
-
-<quote>
-<descrip>
-<tag/Function/Load and install the given driver.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_load_driver (const char *name);/
-<tag/Description/Load and install the driver by name.
-Will just load the driver and check if loading was successful.
-Will not switch to graphics mode.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_load_vectorfont<label id="tgi_load_vectorfont"><p>
-
-<quote>
-<descrip>
-<tag/Function/Load the given vector font.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/const tgi_vectorfont* __fastcall__ tgi_load_vectorfont (const char* name);/
-<tag/Description/
-Load a vector font into memory and return it. In case of errors, NULL is
-returned and an error is set, which can be retrieved using tgi_geterror.
-To use the font, it has to be installed using tgi_install_vectorfont.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">,
-<ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_outtext<label id="tgi_outtext"><p>
-
-<quote>
-<descrip>
-<tag/Function/Output text at the current graphics cursor position.
-The graphics cursor is moved to the end of the text.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_outtext (const char* s);/
-<tag/Description/Output text at the current graphics cursor position.
-The graphics cursor is moved to the end of the text.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_outtextxy<label id="tgi_outtextxy"><p>
-
-<quote>
-<descrip>
-<tag/Function/Output text at the given cursor position.
-The graphics cursor is moved to the end of the text.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_outtextxy (int x, int y, const char* s);/
-<tag/Description/Output text at the given cursor position.
-The graphics cursor is moved to the end of the text.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_pieslice<label id="tgi_pieslice"><p>
-
-<quote>
-<descrip>
-<tag/Function/Draw an elliptic pie slice in the current color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_pie slice (int x, int y,
-unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
-<tag/Description/The function draws an elliptic pie slice with center at x/y
-and radii rx/ry using the current drawing color. The pie slice covers the angle
-between sa and ea (startangle and endangle), which must be in the range
-0..360.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-<item>The function behaves unexpectedly or may crash if the angles are out
-of range.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_bar" name="tgi_arc">,
-<ref id="tgi_bar" name="tgi_bar">,
-<ref id="tgi_circle" name="tgi_circle">,
-<ref id="tgi_ellipse" name="tgi_ellipse">,
-<ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
-/* Draw the closed upper half of an ellipse */
-tgi_setcolor(TGI_COLOR_BLUE);
-tgi_pieslice (50, 50, 40, 20, 0, 180);
-</verb>
-</descrip>
-</quote>
-
-
-<sect1>tgi_setaspectratio<label id="tgi_setaspectratio"><p>
-
-<quote> <descrip> <tag/Function/Set the pixel aspect ratio.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setaspectratio (unsigned ratio);/
-<tag/Description/The function sets the pixel aspect ratio for the current
-driver and display. The argument is an 8.8 fixed point value. The aspect ratio
-may be used to correct geometric shapes so they look correct on a given
-display. As an example, a circle with a radius of 100 pixels may look elliptic
-on some driver/display combinations if the aspect ratio is not 1.00.
-<tag/Notes/<itemize>
-<item>The aspect ratio is encoded in the TGI driver which assumes a "standard"
-monitor for the given platform. The aspect ratio may be wrong if another
-monitor is used.
-<item>No TGI function will use the aspect ratio. It is up to the programmer to
-make use of it.
-<item>The <tt/tgi_setaspectratio/ function can be used to change the aspect
-ratio for a loaded driver. The value is not reset by <ref id="tgi_init"
-name="tgi_init">, so if a driver is linked statically to an application,
-switching into and out of graphics mode will not restore the original aspect
-ratio.
-<item>The function is available only as a fastcall function; so, it may be used
-only in the presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_getaspectratio" name="tgi_getaspectratio">
-<tag/Example/None.
-</descrip>
-</quote>
-
-
-<sect1>tgi_setcolor<label id="tgi_setcolor"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set color to be used in future draw operations.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setcolor (unsigned char color);/
-<tag/Description/Set color to be used in future draw operations.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/<verb>
-tgi_setcolor(TGI_COLOR_BLACK);
-tgi_bar(0,0,30,30);
-tgi_setcolor(TGI_COLOR_WHITE);
-tgi_bar(10,10,20,20);
-</verb>
-</descrip>
-</quote>
-
-<sect1>tgi_setdrawpage<label id="tgi_setdrawpage"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set the page for drawing.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setdrawpage (unsigned char page);/
-<tag/Description/If the drawpage and the viewpage are the same then all drawing
-is seen immediately as it is drawn. For double buffered games you can set the
-drawpage to a different page than the viewpage. This lets you draw the next
-screen in the background and when the screen is ready you display it.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/<verb>
-tgi_setdrawpage(1);
-tgi_outtextxy(10, 10, "Hello World");
-tgi_setviewpage(1); // Show page 1
-tgi_setdrawpage(0);
-tgi_outtextxy(10, 10, "Creating next frame");
-...
-tgi_setviewpage(0); // Show page 0
-</verb>
-</descrip>
-</quote>
-
-<sect1>tgi_setpalette<label id="tgi_setpalette"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set the palette (not available with all drivers/hardware).
-Palette is a pointer to as many entries as there are colors.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setpalette (const unsigned char* palette);/
-<tag/Description/Set the palette (not available with all drivers/hardware).
-Palette is a pointer to as many entries as there are colors.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_setpixel<label id="tgi_setpixel"><p>
-
-<quote>
-<descrip>
-<tag/Function/Plot a pixel on the drawpage with the current color.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setpixel (int x, int y);/
-<tag/Description/Plot a pixel on the drawpage with the current color.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_setviewpage<label id="tgi_setviewpage"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set page to be visible on screen.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_setviewpage (unsigned char page);/
-<tag/Description/If the drawpage and the viewpage are the same then all drawing
-is seen immediately as it is drawn. For double buffered games you can set the
-drawpage to a different page than the viewpage. This lets you draw the next
-screen in the background and when the screen is ready you display it.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/<verb>
-tgi_setdrawpage(1);
-tgi_outtextxy(10, 10, "Hello World");
-tgi_setviewpage(1); // Show page 1
-tgi_setdrawpage(0);
-tgi_outtextxy(10, 10, "Creating next frame");
-...
-tgi_setviewpage(0); // Show page 0
-</verb>
-</descrip>
-</quote>
-
-<sect1>tgi_gettextheight<label id="tgi_gettextheight"><p>
-
-<quote>
-<descrip>
-<tag/Function/Calculate the height of the text in pixels according to
-the current text style.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned __fastcall__ tgi_gettextheight (const char* s);/
-<tag/Description/Calculate the height of the text in pixels according to
-the current text style.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_settextscale<label id="tgi_settextscale"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set the scaling for text output.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_settextscale (unsigned width, unsigned height);/
-<tag/Description/
-Set the scaling for text output. The scaling factors for width and height
-are 8.8 fixed point values. This means that $100 = 1 $200 = 2 etc.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_settextstyle" name="tgi_settextstyle">
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_settextstyle<label id="tgi_settextstyle"><p>
-
-<quote>
-<descrip>
-<tag/Function/Set the style for text output.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_settextstyle (unsigned char magx, unsigned char magy, unsigned char dir, unsigned char font);/
-<tag/Description/Set the style for text output.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/
-<ref id="tgi_settextscale" name="tgi_settextscale">
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_gettextwidth<label id="tgi_gettextwidth"><p>
-
-<quote>
-<descrip>
-<tag/Function/Calculate the width of the text in pixels according to the current text style.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/unsigned __fastcall__ tgi_gettextwidth (const char* s);/
-<tag/Description/Calculate the width of the text in pixels according to the current text style.
-<tag/Notes/<itemize>
-<item>The function is only available as fastcall function, so it may only
-be used in presence of a prototype.
-</itemize>
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_uninstall<label id="tgi_uninstall"><p>
-
-<quote>
-<descrip>
-<tag/Function/Uninstall the currently loaded driver but do not unload it.
-Will call tgi_done if necessary.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void tgi_uninstall (void);/
-<tag/Description/Uninstall the currently loaded driver but do not unload it.
-Will call tgi_done if necessary.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
-<sect1>tgi_unload<label id="tgi_unload"><p>
-
-<quote>
-<descrip>
-<tag/Function/Uninstall, then unload the currently loaded driver.
-Will call tgi_done if necessary.
-<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void tgi_unload (void);/
-<tag/Description/Uninstall, then unload the currently loaded driver.
-Will call tgi_done if necessary.
-<tag/Availability/cc65
-<tag/See also/Other tgi functions.
-<tag/Example/None.
-</descrip>
-</quote>
-
<sect1>time<label id="time"><p>
<quote>
<tag><htmlurl url="dio.html" name="dio.html"></tag>
Low-level disk I/O API.
+ <tag><htmlurl url="tgi.html" name="tgi.html"></tag>
+ Tiny Graphics Interface.
+
<tag><htmlurl url="geos.html" name="geos.html"></tag>
The GEOSLib manual.
--- /dev/null
+<!doctype linuxdoc system>
+
+<article>
+<title>Tiny Graphics Interface
+<author><url url="mailto:uz@cc65.org" name="Ullrich von Bassewitz">
+<date>2017-11-23
+
+<abstract>
+The cc65 library provides functions for platform independent graphics.
+Include the tgi.h header file to get the necessary definitions.
+</abstract>
+
+<!-- Table of contents -->
+<itemize>
+<item><ref id="tgi_arc" name="tgi_arc">
+<item><ref id="tgi_bar" name="tgi_bar">
+<item><ref id="tgi_circle" name="tgi_circle">
+<item><ref id="tgi_clear" name="tgi_clear">
+<item><ref id="tgi_done" name="tgi_done">
+<item><ref id="tgi_ellipse" name="tgi_ellipse">
+<item><ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
+<item><ref id="tgi_getaspectratio" name="tgi_getaspectratio">
+<item><ref id="tgi_getcolor" name="tgi_getcolor">
+<item><ref id="tgi_getcolorcount" name="tgi_getcolorcount">
+<item><ref id="tgi_getdefpalette" name="tgi_getdefpalette">
+<item><ref id="tgi_geterror" name="tgi_geterror">
+<item><ref id="tgi_geterrormsg" name="tgi_geterrormsg">
+<item><ref id="tgi_getmaxcolor" name="tgi_getmaxcolor">
+<item><ref id="tgi_getmaxx" name="tgi_getmaxx">
+<item><ref id="tgi_getmaxy" name="tgi_getmaxy">
+<item><ref id="tgi_getpagecount" name="tgi_getpagecount">
+<item><ref id="tgi_getpalette" name="tgi_getpalette">
+<item><ref id="tgi_getpixel" name="tgi_getpixel">
+<item><ref id="tgi_gettextheight" name="tgi_gettextheight">
+<item><ref id="tgi_gettextwidth" name="tgi_gettextwidth">
+<item><ref id="tgi_getxres" name="tgi_getxres">
+<item><ref id="tgi_getyres" name="tgi_getyres">
+<item><ref id="tgi_gotoxy" name="tgi_gotoxy">
+<item><ref id="tgi_init" name="tgi_init">
+<item><ref id="tgi_install" name="tgi_install">
+<item><ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">
+<item><ref id="tgi_ioctl" name="tgi_ioctl">
+<item><ref id="tgi_line" name="tgi_line">
+<item><ref id="tgi_lineto" name="tgi_lineto">
+<item><ref id="tgi_load_driver" name="tgi_load_driver">
+<item><ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">
+<item><ref id="tgi_outtext" name="tgi_outtext">
+<item><ref id="tgi_outtextxy" name="tgi_outtextxy">
+<item><ref id="tgi_setaspectratio" name="tgi_setaspectratio">
+<item><ref id="tgi_setcolor" name="tgi_setcolor">
+<item><ref id="tgi_setdrawpage" name="tgi_setdrawpage">
+<item><ref id="tgi_setpalette" name="tgi_setpalette">
+<item><ref id="tgi_setpixel" name="tgi_setpixel">
+<item><ref id="tgi_setviewpage" name="tgi_setviewpage">
+<item><ref id="tgi_settextscale" name="tgi_settextscale">
+<item><ref id="tgi_settextstyle" name="tgi_settextstyle">
+<item><ref id="tgi_uninstall" name="tgi_uninstall">
+<item><ref id="tgi_unload" name="tgi_unload">
+</itemize>
+
+<!-- Begin the document -->
+
+<sect1>tgi_arc<label id="tgi_arc"><p>
+
+<quote>
+<descrip>
+<tag/Function/Draw an elliptic arc in the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_arc (int x, int y,
+unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
+<tag/Description/The function draws an elliptic arc with center at x/y and
+radii rx/ry using the current drawing color. The arc covers the angle
+between sa and ea (startangle and endangle), which must be in the range
+0..360.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>The function behaves unexpectedly or may crash if the angles are out
+of range.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_bar" name="tgi_bar">,
+<ref id="tgi_circle" name="tgi_circle">,
+<ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
+<ref id="tgi_setcolor" name="tgi_setcolor">
+<tag/Example/<verb>
+/* Draw the upper half of an ellipse */
+tgi_setcolor(TGI_COLOR_BLUE);
+tgi_arc (50, 50, 40, 20, 0, 180);
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_bar<label id="tgi_bar"><p>
+
+<quote>
+<descrip>
+<tag/Function/The function fills a rectangle on the drawpage with the current
+color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_bar (int x1, int y1, int x2, int y2);/
+<tag/Description/The function fills a rectangle on the drawpage with the current
+color.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi function
+<tag/Example/<verb>
+tgi_setcolor(TGI_COLOR_GREEN);
+tgi_bar(10, 10, 100, 60);
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_circle<label id="tgi_circle"><p>
+
+<quote>
+<descrip>
+<tag/Function/The function draws a circle in the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_circle (int x, int y, unsigned char radius);/
+<tag/Description/The function draws a circle in the current color.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_arc" name="tgi_arc">,
+<ref id="tgi_bar" name="tgi_bar">,
+<ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
+<ref id="tgi_setcolor" name="tgi_setcolor">
+<tag/Example/<verb>
+tgi_setcolor(TGI_COLOR_BLACK);
+tgi_circle(50, 40, 40);
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_clear<label id="tgi_clear"><p>
+
+<quote>
+<descrip>
+<tag/Function/Clear the drawpage
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void tgi_clear (void);/
+<tag/Description/Clear the drawpage
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_done<label id="tgi_done"><p>
+
+<quote>
+<descrip>
+<tag/Function/End graphics mode, switch back to text mode.
+Will NOT uninstall or unload the driver!
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void tgi_done (void);/
+<tag/Description/End graphics mode, switch back to text mode.
+Will NOT uninstall or unload the driver!
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_ellipse<label id="tgi_ellipse"><p>
+
+<quote>
+<descrip>
+<tag/Function/The function draws an ellipse in the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_ellipse (int x, int y, unsigned char rx, unsigned char ry);/
+<tag/Description/The function draws an ellipse at position x/y with radii
+rx and ry, using the current drawing color.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_arc" name="tgi_arc">,
+<ref id="tgi_bar" name="tgi_bar">,
+<ref id="tgi_circle" name="tgi_circle">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
+<ref id="tgi_setcolor" name="tgi_setcolor">
+<tag/Example/<verb>
+tgi_setcolor(TGI_COLOR_RED);
+tgi_ellipse (50, 40, 40, 20);
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_free_vectorfont<label id="tgi_free_vectorfont"><p>
+
+<quote>
+<descrip>
+<tag/Function/Free a vector font that was previously loaded into memory.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_free_vectorfont (const tgi_vectorfont* font);/
+<tag/Description/Free a vector font that was previously loaded into memory.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">,
+<ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getaspectratio<label id="tgi_getaspectratio"><p>
+
+<quote> <descrip> <tag/Function/Return the pixel aspect ratio.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getaspectratio (void);/
+<tag/Description/The function returns the pixel aspect ratio for the current
+driver and display as an 8.8 fixed point value. It may be used to correct
+geometric shapes so they look correct on the display. As an example, a circle
+with a radius of 100 pixels may look elliptic on some driver/display
+combinations if the aspect ratio is not 1.00.
+<tag/Notes/<itemize>
+<item>The aspect ratio is encoded in the TGI driver which assumes a "standard"
+monitor for the given platform. The aspect ratio may be wrong if another
+monitor is used.
+<item>No TGI function will use the aspect ratio. It is up to the programmer to
+make use of it.
+<item>The <ref id="tgi_setaspectratio" name="tgi_setaspectratio"> function can
+be used to change the aspect ratio for a loaded driver. The value is not reset
+by <ref id="tgi_init" name="tgi_init">, so if a driver is linked statically to
+an application, switching into and out of graphics mode will not restore the
+original aspect ratio.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_setaspectratio" name="tgi_setaspectratio">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getcolor<label id="tgi_getcolor"><p>
+
+<quote>
+<descrip>
+<tag/Function/Return the current drawing color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char tgi_getcolor (void);/
+<tag/Description/The actual color is an index to a palette. During tgi_init
+you will get a default palette. The number of colors depend on the platform.
+All platforms recognize at least TGI_COLOR_BLACK and TGI_COLOR_WHITE. But some
+platforms have many more predefined colors. If you paint using TGI_COLOR_GREEN
+and then you change the green of the palette to blue using tgi_setpalette then
+after this painting in TGI_COLOR_GREEN will actually be blue.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/<verb>
+color = tgi_getcolor();
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_getcolorcount<label id="tgi_getcolorcount"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the number of available colors.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char tgi_getcolorcount (void);/
+<tag/Description/Tgi platforms use indexed color palettes. This function
+returns the number of entries we can use in the palette.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/<verb>
+if (tgi_getcolorcount() == 2) {
+ printf("Only monochrome graphics is supported\n");
+}
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_getdefpalette<label id="tgi_getdefpalette"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the palette installed by default.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/const unsigned char* tgi_getdefpalette (void);/
+<tag/Description/The tgi driver has a default palette that is active at startup.
+The named colors TGI_COLOR_BLACK, TGI_COLOR_WHITE, TGI_COLOR_RED... need this
+palette to work correctly.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_geterror<label id="tgi_geterror"><p>
+
+<quote>
+<descrip>
+<tag/Function/Return the error code for the last operation.
+This will also clear the error.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char tgi_geterror (void);/
+<tag/Description/Return the error code for the last operation.
+This will also clear the error.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_geterrormsg<label id="tgi_geterrormsg"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get an error message describing the error.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/const char* __fastcall__ tgi_geterrormsg (unsigned char code);/
+<tag/Description/Get an error message describing the error.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getmaxcolor<label id="tgi_getmaxcolor"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the highest index of the palette.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char tgi_getmaxcolor (void);/
+<tag/Description/Get the highest index of the palette.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getmaxx<label id="tgi_getmaxx"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the maximum x coordinate that can be used on this screen.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getmaxx (void);/
+<tag/Description/Get the maximum x coordinate that can be used on this screen.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getmaxy<label id="tgi_getmaxy"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the maximum y coordinate that can be used on this screen.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getmaxy (void);/
+<tag/Description/Get the maximum y coordinate that can be used on this screen.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getpagecount<label id="tgi_getpagecount"><p>
+
+<quote>
+<descrip>
+<tag/Function/Return the number of screen pages available.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getpagecount (void);/
+<tag/Description/Return the number of screen pages available.
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_setdrawpage" name="tgi_setdrawpage">,
+<ref id="tgi_setviewpage" name="tgi_setviewpage">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getpalette<label id="tgi_getpalette"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the palette installed.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/const unsigned char* tgi_getpalette (void);/
+<tag/Description/Get the palette installed.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getpixel<label id="tgi_getpixel"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the color of a pixel from the viewpage.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char __fastcall__ tgi_getpixel (int x, int y);/
+<tag/Description/Get the color of a pixel from the viewpage.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getxres<label id="tgi_getxres"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get number of horisontal pixels on the screen.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getxres (void);/
+<tag/Description/Get number of horisontal pixels on the screen.
+This is same as tgi_maxx()+1.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_getyres<label id="tgi_getyres"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get number of vertical pixels on the screen.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned tgi_getyres (void);/
+<tag/Description/Get number of vertical pixels on the screen.
+This is same as tgi_maxy()+1.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_gotoxy<label id="tgi_gotoxy"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set graphics cursor at x, y.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_gotoxy (int x, int y);/
+<tag/Description/Set graphics cursor at x, y.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_init<label id="tgi_init"><p>
+
+<quote>
+<descrip>
+<tag/Function/Initialize the already loaded graphics driver.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void tgi_init (void);/
+<tag/Description/The tgi_init function will set the default palette to the
+hardware.
+<tag/Notes/<itemize>
+<item><tt/tgi_init/ will not clear the screen. This allows switching between
+text and graphics mode on platforms that have separate memory areas for the
+screens. If you want the screen cleared, call <tt/<ref id="tgi_clear"
+name="tgi_clear">/ after <tt/tgi_init/.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/<verb>
+tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
+tgi_init(); //Set up the default palette and clear the screen.
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_install<label id="tgi_install"><p>
+
+<quote>
+<descrip>
+<tag/Function/Install an already loaded driver and return an error code.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned char __fastcall__ tgi_install (void* driver);/
+<tag/Description/The function installs a driver that was already loaded into
+memory (or linked statically to the program). It returns an error code
+(<tt/TGI_ERR_OK/ in case of success).
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only be
+used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_load_driver" name="tgi_load_driver">,
+<ref id="tgi_uninstall" name="tgi_uninstall">,
+<ref id="tgi_unload" name="tgi_unload">
+<tag/Example/<verb>
+tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
+tgi_init(); //Set up the default palette and clear the screen.
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_install_vectorfont<label id="tgi_install_vectorfont"><p>
+
+<quote>
+<descrip>
+<tag/Function/Install an already loaded driver and return an error code.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_install_vectorfont (const tgi_vectorfont* font);/
+<tag/Description/
+Install a vector font for use. More than one vector font can be loaded,
+but only one can be active. This function is used to tell which one. Call
+with a NULL pointer to uninstall the currently installed font.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only be
+used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_load_vectorfont" name="tgi_load_vectorfont">,
+<ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_ioctl<label id="tgi_ioctl"><p>
+
+<quote>
+<descrip>
+<tag/Function/Platform dependent code extensions.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned __fastcall__ tgi_ioctl (unsigned char code, void* data);/
+<tag/Description/Some platforms have extra display hardware that is not
+supported by standard tgi functions. You can extend the driver to support
+this extra hardware using tgi_ioctl functions.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>These functions are not easily portable to other cc65 platforms.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/<verb>
+#define tgi_sprite(spr) tgi_ioctl(0, (void*)(spr))
+#define tgi_flip() tgi_ioctl(1, (void*)0)
+#define tgi_setbgcolor(bgcol) tgi_ioctl(2, (void*)(bgcol))
+#define tgi_setframerate(rate) tgi_ioctl(3, (void*)(rate))
+#define tgi_busy() tgi_ioctl(4, (void*)0)
+#define tgi_updatedisplay() tgi_ioctl(4, (void*)1)
+if (!tgi_busy()) {
+ tgi_sprite(&background);
+ tgi_setcolor(TGI_COLOR_BLUE);
+ tgi_outttextxy(20,40,"Hello World");
+ tgi_updatedisplay();
+}
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_line<label id="tgi_line"><p>
+
+<quote>
+<descrip>
+<tag/Function/Draw a line in the current drawing color.
+The graphics cursor will be set to x2/y2 by this call.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_line (int x1, int y1, int x2, int y2);/
+<tag/Description/Draw a line in the current drawing color.
+The graphics cursor will be set to x2/y2 by this call.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_lineto<label id="tgi_lineto"><p>
+
+<quote>
+<descrip>
+<tag/Function/Draw a line in the current drawing color from the graphics
+cursor to the new end point. The graphics cursor will be updated to x2/y2.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_lineto (int x2, int y2);/
+<tag/Description/Draw a line in the current drawing color from the graphics
+cursor to the new end point. The graphics cursor will be updated to x2/y2.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_load_driver<label id="tgi_load_driver"><p>
+
+<quote>
+<descrip>
+<tag/Function/Load and install the given driver.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_load_driver (const char *name);/
+<tag/Description/Load and install the driver by name.
+Will just load the driver and check if loading was successful.
+Will not switch to graphics mode.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_load_vectorfont<label id="tgi_load_vectorfont"><p>
+
+<quote>
+<descrip>
+<tag/Function/Load the given vector font.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/const tgi_vectorfont* __fastcall__ tgi_load_vectorfont (const char* name);/
+<tag/Description/
+Load a vector font into memory and return it. In case of errors, NULL is
+returned and an error is set, which can be retrieved using tgi_geterror.
+To use the font, it has to be installed using tgi_install_vectorfont.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_install_vectorfont" name="tgi_install_vectorfont">,
+<ref id="tgi_free_vectorfont" name="tgi_free_vectorfont">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_outtext<label id="tgi_outtext"><p>
+
+<quote>
+<descrip>
+<tag/Function/Output text at the current graphics cursor position.
+The graphics cursor is moved to the end of the text.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_outtext (const char* s);/
+<tag/Description/Output text at the current graphics cursor position.
+The graphics cursor is moved to the end of the text.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_outtextxy<label id="tgi_outtextxy"><p>
+
+<quote>
+<descrip>
+<tag/Function/Output text at the given cursor position.
+The graphics cursor is moved to the end of the text.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_outtextxy (int x, int y, const char* s);/
+<tag/Description/Output text at the given cursor position.
+The graphics cursor is moved to the end of the text.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_pieslice<label id="tgi_pieslice"><p>
+
+<quote>
+<descrip>
+<tag/Function/Draw an elliptic pie slice in the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_pie slice (int x, int y,
+unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
+<tag/Description/The function draws an elliptic pie slice with center at x/y
+and radii rx/ry using the current drawing color. The pie slice covers the angle
+between sa and ea (startangle and endangle), which must be in the range
+0..360.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>The function behaves unexpectedly or may crash if the angles are out
+of range.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_bar" name="tgi_arc">,
+<ref id="tgi_bar" name="tgi_bar">,
+<ref id="tgi_circle" name="tgi_circle">,
+<ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_setcolor" name="tgi_setcolor">
+<tag/Example/<verb>
+/* Draw the closed upper half of an ellipse */
+tgi_setcolor(TGI_COLOR_BLUE);
+tgi_pieslice (50, 50, 40, 20, 0, 180);
+</verb>
+</descrip>
+</quote>
+
+
+<sect1>tgi_setaspectratio<label id="tgi_setaspectratio"><p>
+
+<quote> <descrip> <tag/Function/Set the pixel aspect ratio.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setaspectratio (unsigned ratio);/
+<tag/Description/The function sets the pixel aspect ratio for the current
+driver and display. The argument is an 8.8 fixed point value. The aspect ratio
+may be used to correct geometric shapes so they look correct on a given
+display. As an example, a circle with a radius of 100 pixels may look elliptic
+on some driver/display combinations if the aspect ratio is not 1.00.
+<tag/Notes/<itemize>
+<item>The aspect ratio is encoded in the TGI driver which assumes a "standard"
+monitor for the given platform. The aspect ratio may be wrong if another
+monitor is used.
+<item>No TGI function will use the aspect ratio. It is up to the programmer to
+make use of it.
+<item>The <tt/tgi_setaspectratio/ function can be used to change the aspect
+ratio for a loaded driver. The value is not reset by <ref id="tgi_init"
+name="tgi_init">, so if a driver is linked statically to an application,
+switching into and out of graphics mode will not restore the original aspect
+ratio.
+<item>The function is available only as a fastcall function; so, it may be used
+only in the presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_getaspectratio" name="tgi_getaspectratio">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>tgi_setcolor<label id="tgi_setcolor"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set color to be used in future draw operations.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setcolor (unsigned char color);/
+<tag/Description/Set color to be used in future draw operations.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/<verb>
+tgi_setcolor(TGI_COLOR_BLACK);
+tgi_bar(0,0,30,30);
+tgi_setcolor(TGI_COLOR_WHITE);
+tgi_bar(10,10,20,20);
+</verb>
+</descrip>
+</quote>
+
+<sect1>tgi_setdrawpage<label id="tgi_setdrawpage"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set the page for drawing.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setdrawpage (unsigned char page);/
+<tag/Description/If the drawpage and the viewpage are the same then all drawing
+is seen immediately as it is drawn. For double buffered games you can set the
+drawpage to a different page than the viewpage. This lets you draw the next
+screen in the background and when the screen is ready you display it.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/<verb>
+tgi_setdrawpage(1);
+tgi_outtextxy(10, 10, "Hello World");
+tgi_setviewpage(1); // Show page 1
+tgi_setdrawpage(0);
+tgi_outtextxy(10, 10, "Creating next frame");
+...
+tgi_setviewpage(0); // Show page 0
+</verb>
+</descrip>
+</quote>
+
+<sect1>tgi_setpalette<label id="tgi_setpalette"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set the palette (not available with all drivers/hardware).
+Palette is a pointer to as many entries as there are colors.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setpalette (const unsigned char* palette);/
+<tag/Description/Set the palette (not available with all drivers/hardware).
+Palette is a pointer to as many entries as there are colors.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_setpixel<label id="tgi_setpixel"><p>
+
+<quote>
+<descrip>
+<tag/Function/Plot a pixel on the drawpage with the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setpixel (int x, int y);/
+<tag/Description/Plot a pixel on the drawpage with the current color.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_setviewpage<label id="tgi_setviewpage"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set page to be visible on screen.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_setviewpage (unsigned char page);/
+<tag/Description/If the drawpage and the viewpage are the same then all drawing
+is seen immediately as it is drawn. For double buffered games you can set the
+drawpage to a different page than the viewpage. This lets you draw the next
+screen in the background and when the screen is ready you display it.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/<verb>
+tgi_setdrawpage(1);
+tgi_outtextxy(10, 10, "Hello World");
+tgi_setviewpage(1); // Show page 1
+tgi_setdrawpage(0);
+tgi_outtextxy(10, 10, "Creating next frame");
+...
+tgi_setviewpage(0); // Show page 0
+</verb>
+</descrip>
+</quote>
+
+<sect1>tgi_gettextheight<label id="tgi_gettextheight"><p>
+
+<quote>
+<descrip>
+<tag/Function/Calculate the height of the text in pixels according to
+the current text style.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned __fastcall__ tgi_gettextheight (const char* s);/
+<tag/Description/Calculate the height of the text in pixels according to
+the current text style.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_settextscale<label id="tgi_settextscale"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set the scaling for text output.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_settextscale (unsigned width, unsigned height);/
+<tag/Description/
+Set the scaling for text output. The scaling factors for width and height
+are 8.8 fixed point values. This means that $100 = 1 $200 = 2 etc.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_settextstyle" name="tgi_settextstyle">
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_settextstyle<label id="tgi_settextstyle"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set the style for text output.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_settextstyle (unsigned char magx, unsigned char magy, unsigned char dir, unsigned char font);/
+<tag/Description/Set the style for text output.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_settextscale" name="tgi_settextscale">
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_gettextwidth<label id="tgi_gettextwidth"><p>
+
+<quote>
+<descrip>
+<tag/Function/Calculate the width of the text in pixels according to the current text style.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/unsigned __fastcall__ tgi_gettextwidth (const char* s);/
+<tag/Description/Calculate the width of the text in pixels according to the current text style.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_uninstall<label id="tgi_uninstall"><p>
+
+<quote>
+<descrip>
+<tag/Function/Uninstall the currently loaded driver but do not unload it.
+Will call tgi_done if necessary.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void tgi_uninstall (void);/
+<tag/Description/Uninstall the currently loaded driver but do not unload it.
+Will call tgi_done if necessary.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+<sect1>tgi_unload<label id="tgi_unload"><p>
+
+<quote>
+<descrip>
+<tag/Function/Uninstall, then unload the currently loaded driver.
+Will call tgi_done if necessary.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void tgi_unload (void);/
+<tag/Description/Uninstall, then unload the currently loaded driver.
+Will call tgi_done if necessary.
+<tag/Availability/cc65
+<tag/See also/Other tgi functions.
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+</article>
projects / cc65 / commitdiff