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ugui.c
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/* -------------------------------------------------------------------------------- */
/* -- µGUI - Generic GUI module (C)Achim Döbler, 2015 -- */
/* -------------------------------------------------------------------------------- */
// µGUI is a generic GUI module for embedded systems.
// This is a free software that is open for education, research and commercial
// developments under license policy of following terms.
//
// Copyright (C) 2015, Achim Döbler, all rights reserved.
// URL: http://www.embeddedlightning.com/
//
// * The µGUI module is a free software and there is NO WARRANTY.
// * No restriction on use. You can use, modify and redistribute it for
// personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
// * Redistributions of source code must retain the above copyright notice.
//
/* -------------------------------------------------------------------------------- */
#include "ugui.h"
/* Static functions */
static UG_RESULT _UG_WindowDrawTitle( UG_WINDOW* wnd );
static void _UG_WindowUpdate( UG_WINDOW* wnd );
static UG_RESULT _UG_WindowClear( UG_WINDOW* wnd );
static void _UG_FontSelect( UG_FONT *font);
static UG_S16 _UG_PutChar( UG_CHAR chr, UG_S16 x, UG_S16 y, UG_COLOR fc, UG_COLOR bc);
static UG_S16 _UG_GetCharData(UG_CHAR encoding, const UG_U8 **p);
#ifdef UGUI_USE_UTF8
static UG_U16 _UG_DecodeUTF8(char **str);
#endif
static UG_U16 ptr_8to16(const UG_U8* p){
return ( ((UG_U16)p[0]<<8) | p[1]);
}
/*
static UG_U32 ptr_8to24(const UG_U8* p){
return ( ((UG_U32)p[0]<<16) | ((UG_U32)p[1]<<8) | p[2]);
}
static UG_U32 ptr_8to32(const UG_U8* p){
return ( ((UG_U32)p[0]<<24) | ((UG_U32)p[1]<<16) | ((UG_U32)p[2]<<8) | p[3]);
}
*/
static const UG_COLOR pal_window[] = {
C_PAL_WINDOW
};
/* Pointer to the gui */
static UG_GUI* gui;
UG_S16 UG_Init( UG_GUI* g, UG_DEVICE *device )
{
UG_U8 i;
g->device = device;
#if defined(UGUI_USE_CONSOLE)
g->console.x_start = 4;
g->console.y_start = 4;
g->console.x_end = g->device->x_dim - g->console.x_start-1;
g->console.y_end = g->device->y_dim - g->console.x_start-1;
g->console.x_pos = g->console.x_end;
g->console.y_pos = g->console.y_end;
#endif
g->char_h_space = 1;
g->char_v_space = 1;
g->font=NULL;
g->currentFont.bytes_per_char = 0;
g->currentFont.char_height = 0;
g->currentFont.char_width = 0;
g->currentFont.number_of_chars = 0;
g->currentFont.offset_size = 0;
g->currentFont.widths = NULL;
g->currentFont.offsets = NULL;
g->currentFont.data = NULL;
g->currentFont.font = NULL;
g->desktop_color = C_DESKTOP_COLOR;
g->fore_color = C_WHITE;
g->back_color = C_BLACK;
g->next_window = NULL;
g->active_window = NULL;
g->last_window = NULL;
/* Clear drivers */
for(i=0;i<NUMBER_OF_DRIVERS;i++)
{
g->driver[i].driver = NULL;
g->driver[i].state = 0;
}
gui = g;
return 1;
}
UG_S16 UG_SelectGUI( UG_GUI* g )
{
gui = g;
return 1;
}
UG_GUI* UG_GetGUI( void )
{
return gui;
}
/*
* Sets the GUI font
*/
void UG_FontSelect( UG_FONT* font )
{
gui->font = font;
}
void UG_FillScreen( UG_COLOR c )
{
UG_FillFrame(0,0,gui->device->x_dim-1,gui->device->y_dim-1,c);
}
void UG_FillFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
{
UG_S16 n,m;
if ( x2 < x1 )
swap(x1,x2);
if ( y2 < y1 )
swap(y1,y2);
/* Is hardware acceleration available? */
if ( gui->driver[DRIVER_FILL_FRAME].state & DRIVER_ENABLED )
{
if( ((UG_RESULT(*)(UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c))gui->driver[DRIVER_FILL_FRAME].driver)(x1,y1,x2,y2,c) == UG_RESULT_OK ) return;
}
for( m=y1; m<=y2; m++ )
{
for( n=x1; n<=x2; n++ )
{
gui->device->pset(n,m,c);
}
}
}
void UG_FillRoundFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 r, UG_COLOR c )
{
UG_S16 x,y,xd;
if ( x2 < x1 )
swap(x1,x2);
if ( y2 < y1 )
swap(y1,y2);
if ( r<=0 ) return;
xd = 3 - (r << 1);
x = 0;
y = r;
UG_FillFrame(x1 + r, y1, x2 - r, y2, c);
while ( x <= y )
{
if( y > 0 )
{
UG_DrawLine(x2 + x - r, y1 - y + r, x2+ x - r, y + y2 - r, c);
UG_DrawLine(x1 - x + r, y1 - y + r, x1- x + r, y + y2 - r, c);
}
if( x > 0 )
{
UG_DrawLine(x1 - y + r, y1 - x + r, x1 - y + r, x + y2 - r, c);
UG_DrawLine(x2 + y - r, y1 - x + r, x2 + y - r, x + y2 - r, c);
}
if ( xd < 0 )
{
xd += (x << 2) + 6;
}
else
{
xd += ((x - y) << 2) + 10;
y--;
}
x++;
}
}
void UG_DrawMesh( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_U16 spacing, UG_COLOR c )
{
UG_U16 p;
if ( x2 < x1 )
swap(x1,x2);
if ( y2 < y1 )
swap(y1,y2);
for( p=y1; p<y2; p+=spacing )
{
UG_DrawLine(x1, p, x2, p, c);
}
UG_DrawLine(x1, y2, x2, y2, c);
for( p=x1; p<x2; p+=spacing )
{
UG_DrawLine(p, y1, p, y2, c);
}
UG_DrawLine(x2, y1, x2, y2, c);
}
void UG_DrawFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
{
UG_DrawLine(x1,y1,x2,y1,c);
UG_DrawLine(x1,y2,x2,y2,c);
UG_DrawLine(x1,y1,x1,y2,c);
UG_DrawLine(x2,y1,x2,y2,c);
}
void UG_DrawRoundFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 r, UG_COLOR c )
{
if(r == 0)
{
UG_DrawFrame(x1, y1, x2, y2, c);
return;
}
if ( x2 < x1 )
swap(x1,x2);
if ( y2 < y1 )
swap(y1,y2);
if(r) r++; // Fix for corner radius looking weird, this makes the same outline as UG_FillRoundFrame
if ( r > x2 ) return;
if ( r > y2 ) return;
UG_DrawLine(x1+r, y1, x2-r, y1, c);
UG_DrawLine(x1+r, y2, x2-r, y2, c);
UG_DrawLine(x1, y1+r, x1, y2-r, c);
UG_DrawLine(x2, y1+r, x2, y2-r, c);
UG_DrawArc(x1+r, y1+r, r, 0x0C, c);
UG_DrawArc(x2-r, y1+r, r, 0x03, c);
UG_DrawArc(x1+r, y2-r, r, 0x30, c);
UG_DrawArc(x2-r, y2-r, r, 0xC0, c);
}
void UG_DrawPixel( UG_S16 x0, UG_S16 y0, UG_COLOR c )
{
gui->device->pset(x0,y0,c);
}
void UG_DrawCircle( UG_S16 x0, UG_S16 y0, UG_S16 r, UG_COLOR c )
{
UG_S16 x,y,xd,yd,e;
if ( x0<0 ) return;
if ( y0<0 ) return;
if ( r<=0 ) return;
xd = 1 - (r << 1);
yd = 0;
e = 0;
x = r;
y = 0;
while ( x >= y )
{
gui->device->pset(x0 - x, y0 + y, c);
gui->device->pset(x0 - x, y0 - y, c);
gui->device->pset(x0 + x, y0 + y, c);
gui->device->pset(x0 + x, y0 - y, c);
gui->device->pset(x0 - y, y0 + x, c);
gui->device->pset(x0 - y, y0 - x, c);
gui->device->pset(x0 + y, y0 + x, c);
gui->device->pset(x0 + y, y0 - x, c);
y++;
e += yd;
yd += 2;
if ( ((e << 1) + xd) > 0 )
{
x--;
e += xd;
xd += 2;
}
}
}
void UG_FillCircle( UG_S16 x0, UG_S16 y0, UG_S16 r, UG_COLOR c )
{
UG_S16 x,y,xd;
if ( x0<0 ) return;
if ( y0<0 ) return;
if ( r<=0 ) return;
xd = 3 - (r << 1);
x = 0;
y = r;
while ( x <= y )
{
if( y > 0 )
{
UG_DrawLine(x0 - x, y0 - y,x0 - x, y0 + y, c);
UG_DrawLine(x0 + x, y0 - y,x0 + x, y0 + y, c);
}
if( x > 0 )
{
UG_DrawLine(x0 - y, y0 - x,x0 - y, y0 + x, c);
UG_DrawLine(x0 + y, y0 - x,x0 + y, y0 + x, c);
}
if ( xd < 0 )
{
xd += (x << 2) + 6;
}
else
{
xd += ((x - y) << 2) + 10;
y--;
}
x++;
}
UG_DrawCircle(x0, y0, r,c);
}
void UG_DrawArc( UG_S16 x0, UG_S16 y0, UG_S16 r, UG_U8 s, UG_COLOR c )
{
UG_S16 x,y,xd,yd,e;
if ( x0<0 ) return;
if ( y0<0 ) return;
if ( r<=0 ) return;
xd = 1 - (r << 1);
yd = 0;
e = 0;
x = r;
y = 0;
while ( x >= y )
{
// Q1
if ( s & 0x01 ) gui->device->pset(x0 + x, y0 - y, c);
if ( s & 0x02 ) gui->device->pset(x0 + y, y0 - x, c);
// Q2
if ( s & 0x04 ) gui->device->pset(x0 - y, y0 - x, c);
if ( s & 0x08 ) gui->device->pset(x0 - x, y0 - y, c);
// Q3
if ( s & 0x10 ) gui->device->pset(x0 - x, y0 + y, c);
if ( s & 0x20 ) gui->device->pset(x0 - y, y0 + x, c);
// Q4
if ( s & 0x40 ) gui->device->pset(x0 + y, y0 + x, c);
if ( s & 0x80 ) gui->device->pset(x0 + x, y0 + y, c);
y++;
e += yd;
yd += 2;
if ( ((e << 1) + xd) > 0 )
{
x--;
e += xd;
xd += 2;
}
}
}
void UG_DrawLine( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
{
UG_S16 n, dx, dy, sgndx, sgndy, dxabs, dyabs, x, y, drawx, drawy;
/* Is hardware acceleration available? */
if ( gui->driver[DRIVER_DRAW_LINE].state & DRIVER_ENABLED )
{
if( ((UG_RESULT(*)(UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c))gui->driver[DRIVER_DRAW_LINE].driver)(x1,y1,x2,y2,c) == UG_RESULT_OK ) return;
}
dx = x2 - x1;
dy = y2 - y1;
dxabs = (dx>0)?dx:-dx;
dyabs = (dy>0)?dy:-dy;
sgndx = (dx>0)?1:-1;
sgndy = (dy>0)?1:-1;
x = dyabs >> 1;
y = dxabs >> 1;
drawx = x1;
drawy = y1;
gui->device->pset(drawx, drawy,c);
if( dxabs >= dyabs )
{
for( n=0; n<dxabs; n++ )
{
y += dyabs;
if( y >= dxabs )
{
y -= dxabs;
drawy += sgndy;
}
drawx += sgndx;
gui->device->pset(drawx, drawy,c);
}
}
else
{
for( n=0; n<dyabs; n++ )
{
x += dxabs;
if( x >= dyabs )
{
x -= dyabs;
drawx += sgndx;
}
drawy += sgndy;
gui->device->pset(drawx, drawy,c);
}
}
}
/* Draw a triangle */
void UG_DrawTriangle( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 x3, UG_S16 y3, UG_COLOR c ){
UG_DrawLine(x1, y1, x2, y2, c);
UG_DrawLine(x2, y2, x3, y3, c);
UG_DrawLine(x3, y3, x1, y1, c);
}
/* Fill a triangle */
void UG_FillTriangle( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 x3, UG_S16 y3, UG_COLOR c ){
UG_S16 a, b, y, last;
/* Sort coordinates by Y order (y3 >= y2 >= y1) */
if (y1 > y2) {
swap(y1, y2); swap(x1, x2);
}
if (y2 > y3) {
swap(y3, y2); swap(x3, x2);
}
if (y1 > y2) {
swap(y1, y2); swap(x1, x2);
}
/* Handle awkward all-on-same-line case as its own thing */
if (y1 == y3) {
a = b = x1;
if (x2 < a) {
a = x2;
} else if (x2 > b) {
b = x2;
}
if (x3 < a) {
a = x3;
} else if (x3 > b) {
b = x3;
}
UG_DrawLine(a, y1, b + 1, y1, c);
return;
}
UG_S16
dx01 = x2 - x1,
dy01 = y2 - y1,
dx02 = x3 - x1,
dy02 = y3 - y1,
dx12 = x3 - x2,
dy12 = y3 - y2,
sa = 0,
sb = 0;
/* For upper part of triangle, find scanline crossings for segments
* 0-1 and 0-2. If y2=y3 (flat-bottomed triangle), the scanline y2
* is included here (and second loop will be skipped, avoiding a /0
* error there), otherwise scanline y2 is skipped here and handled
* in the second loop...which also avoids a /0 error here if y1=y2
* (flat-topped triangle).
*/
if (y2 == y3) {
last = y2; /* Include y2 scanline */
} else {
last = y2 - 1; /* Skip it */
}
for (y = y1; y <= last; y++) {
a = x1 + sa / dy01;
b = x1 + sb / dy02;
sa += dx01;
sb += dx02;
/* longhand:
a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
b = x1 + (x3 - x1) * (y - y1) / (y3 - y1);
*/
if (a > b) {
swap(a, b);
}
UG_DrawLine(a, y, b + 1, y, c);
}
/* For lower part of triangle, find scanline crossings for segments
* 0-2 and 1-2. This loop is skipped if y2=y3.
*/
sa = dx12 * (y - y2);
sb = dx02 * (y - y1);
for (; y <= y3; y++) {
a = x2 + sa / dy12;
b = x1 + sb / dy02;
sa += dx12;
sb += dx02;
/* longhand:
a = x2 + (x3 - x2) * (y - y2) / (y3 - y2);
b = x1 + (x3 - x1) * (y - y1) / (y3 - y1);
*/
if (a > b) {
swap(a, b);
}
UG_DrawLine(a, y, b + 1, y, c);
}
}
void UG_PutString( UG_S16 x, UG_S16 y, char* str )
{
UG_S16 xp,yp,cw;
UG_CHAR chr;
xp=x;
yp=y;
_UG_FontSelect(gui->font);
while ( *str != 0 )
{
#ifdef UGUI_USE_UTF8
if(! gui->currentFont.is_old_font){ // Old font charset compatibility
chr = _UG_DecodeUTF8(&str);
}
else{
chr = *str++;
}
#else
chr = *str++;
#endif
if ( chr == '\n' )
{
xp = gui->device->x_dim;
continue;
}
cw = _UG_GetCharData(chr,NULL);
if(cw==-1) continue;
if ( xp + cw > gui->device->x_dim - 1 )
{
xp = x;
yp += gui->currentFont.char_height+gui->char_v_space;
}
_UG_PutChar(chr, xp, yp, gui->fore_color, gui->back_color);
xp += cw + gui->char_h_space;
}
if((gui->driver[DRIVER_FILL_AREA].state & DRIVER_ENABLED))
((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(-1,-1,-1,-1); // -1 to indicate finish
}
void UG_PutChar( UG_CHAR chr, UG_S16 x, UG_S16 y, UG_COLOR fc, UG_COLOR bc )
{
_UG_FontSelect(gui->font);
_UG_PutChar(chr,x,y,fc,bc);
if((gui->driver[DRIVER_FILL_AREA].state & DRIVER_ENABLED))
((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(-1,-1,-1,-1); // -1 to indicate finish
}
#if defined(UGUI_USE_CONSOLE)
void UG_ConsolePutString( char* str )
{
UG_CHAR chr;
UG_S16 cw;
_UG_FontSelect(gui->font);
while ( *str != 0 )
{
#ifdef UGUI_USE_UTF8
if(! gui->currentFont.is_old_font){ // Old font charset compatibility
chr = _UG_DecodeUTF8(&str);
}
else{
chr = *str++;
}
#else
chr = *str++;
#endif
if ( chr == '\n' )
{
gui->console.x_pos = gui->device->x_dim;
str++;
continue;
}
cw = _UG_GetCharData(chr, NULL);
if(cw==-1){
continue;
}
gui->console.x_pos += cw+gui->char_h_space;
if ( gui->console.x_pos+cw > gui->console.x_end )
{
gui->console.x_pos = gui->console.x_start;
gui->console.y_pos += gui->currentFont.char_height+gui->char_v_space;
}
if ( gui->console.y_pos+ gui->currentFont.char_height > gui->console.y_end )
{
gui->console.x_pos = gui->console.x_start;
gui->console.y_pos = gui->console.y_start;
UG_FillFrame(gui->console.x_start,gui->console.y_start,gui->console.x_end,gui->console.y_end,gui->console.back_color);
}
_UG_PutChar(chr, gui->console.x_pos, gui->console.y_pos, gui->console.fore_color, gui->console.back_color);
}
if((gui->driver[DRIVER_FILL_AREA].state & DRIVER_ENABLED))
((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(-1,-1,-1,-1); // -1 to indicate finish
}
void UG_ConsoleSetArea( UG_S16 xs, UG_S16 ys, UG_S16 xe, UG_S16 ye )
{
gui->console.x_start = xs;
gui->console.y_start = ys;
gui->console.x_end = xe;
gui->console.y_end = ye;
}
void UG_ConsoleSetForecolor( UG_COLOR c )
{
gui->console.fore_color = c;
}
void UG_ConsoleSetBackcolor( UG_COLOR c )
{
gui->console.back_color = c;
}
#endif
void UG_SetForecolor( UG_COLOR c )
{
gui->fore_color = c;
}
void UG_SetBackcolor( UG_COLOR c )
{
gui->back_color = c;
}
UG_S16 UG_GetXDim( void )
{
return gui->device->x_dim;
}
UG_S16 UG_GetYDim( void )
{
return gui->device->y_dim;
}
void UG_FontSetHSpace( UG_U16 s )
{
gui->char_h_space = s;
}
void UG_FontSetVSpace( UG_U16 s )
{
gui->char_v_space = s;
}
void UG_FontSetTransparency( UG_U8 t )
{
gui->transparent_font=t;
}
UG_U8 UG_FontGetTransparency( void )
{
return gui->transparent_font;
}
/* -------------------------------------------------------------------------------- */
/* -- INTERNAL FUNCTIONS -- */
/* -------------------------------------------------------------------------------- */
/*
* Parses a pointer to a string, and converts it to Unicode.
* Automatically increasing the pointer address, so the calling function doesn't need to take care of that.
*
* Based on https://github.com/olikraus/u8g2/blob/master/csrc/u8x8_8x8.c
*
*/
#ifdef UGUI_USE_UTF8
UG_CHAR _UG_DecodeUTF8(char **str) {
char c=**str;
if ( c < 0x80 ) // Fast detection for simple ASCII
{
*str = *str+1;
return c;
}
UG_U8 bytes_left=0;
UG_CHAR encoding=0;
while(**str)
{
c=**str;
*str = *str+1;
if ( bytes_left == 0 )
{
if ( c < 0xe0 ) // 2 byte sequence
{
bytes_left = 1;
c &= 0x01f;
}
else if ( c < 0xf0 ) // 3 byte sequence
{
bytes_left = 2;
c &= 15;
}
else if ( c < 0xf8 ) // 4 byte sequence
{
bytes_left = 3;
c &= 7;
}
else if ( c < 0xfc ) // 5 byte sequence
{
bytes_left = 4;
c &= 3;
}
else // 6 byte sequence
{
bytes_left = 5;
c &= 1;
}
encoding = c;
}
else
{
encoding<<=6;
encoding |= (c & 0x3F);
if ( --bytes_left == 0 )
break;
}
}
return encoding;
}
#endif
/*
* Load char bitmap address into p, return the font width
*/
UG_S16 _UG_GetCharData(UG_CHAR encoding, const UG_U8 **p){
static UG_CHAR last_encoding;
static UG_S16 last_width;
static const UG_U8 * last_p;
static UG_FONT * last_font;
const UG_U8 * offset = gui->currentFont.offsets;
UG_U16 char_start=0, char_stop=0, skip=0;
if( gui->currentFont.font==last_font && encoding==last_encoding){ // If called with the same arguments, return cached data
if(p) *p=last_p; // Load char bitmap address if available. Sometimes called with null p to get only the cached width.
return last_width; // Return width.
}
if( gui->currentFont.is_old_font){ // Compatibility with old fonts charset
switch (encoding)
{
case 0xF6: encoding = 0x94; break; // ö
case 0xD6: encoding = 0x99; break; // Ö
case 0xFC: encoding = 0x81; break; // ü
case 0xDC: encoding = 0x9A; break; // Ü
case 0xE4: encoding = 0x84; break; // ä
case 0xC4: encoding = 0x8E; break; // Ä
case 0xB5: encoding = 0xE6; break; // µ
case 0xB0: encoding = 0xF8; break; // °
}
}
while(1) // Seek through the offsets
{
UG_U8 offset_type = *offset++; // Fist byte indicates offset type: single char, range start, offset end
if(offset_type == 0xFF)
break; // Offset table end
char_start = ptr_8to16(offset);
offset+=2;
if(offset_type == 0) // Single char offset
{
if(encoding==char_start)
break; // Matching the current offset char
else if (encoding<char_start)
return -1; // If the encoding is lower than current range, the char is not in the font
skip++; // Else, increase skip and keep searching
}
else if(offset_type==1){
char_stop = ptr_8to16(offset);
offset+=2;
if(encoding>=char_start && encoding<=char_stop) // If the encoding is between the range
{
skip += (encoding-char_start); // Calculate the skip value
break;
}
else if(encoding<char_start)
return -1; // If the encoding is lower than current range start, the char is not in the font
skip += (char_stop-char_start)+1; // Encoding not found in the current range, increase skip size and clear range flasg
}
}
last_font = gui->currentFont.font; // Update cached data
last_encoding = encoding;
last_p = ( gui->currentFont.data+(skip*gui->currentFont.bytes_per_char));
if( gui->currentFont.widths) // If width table available
last_width = *( gui->currentFont.widths+skip); // Use width from table
else
last_width = gui->currentFont.char_width; // Else use width from char width
if(p)
*p=last_p; // Load char bitmap address
return(last_width); // Return char width
}
/*
* Updates the current font data
*/
void _UG_FontSelect( UG_FONT *font){
if( gui->currentFont.font==font)
return;
gui->currentFont.font = font; // Save Font pointer
gui->currentFont.char_width = *font++; // Byte 0: Char width
gui->currentFont.char_height = *font++; // Byte 1: Char height
gui->currentFont.number_of_chars = ptr_8to16(font); // Bytes 2+3: Number of chars
font+=2;
gui->currentFont.offset_size = ptr_8to16(font); // Bytes 4+5: Offset table size
font+=2;
gui->currentFont.bytes_per_char = ptr_8to16(font); // Bytes 6+7: Bytes per char
font+=2; // Byte 8: Flags
gui->currentFont.font_type = *font & 0x3F; // Bits 5-0: Font BPP
gui->currentFont.is_old_font = (*font & 0x80)&&1; // Bit 7: 1=old font, 0=new font
if(*font++ & 0x40){ // Bit 6: 1=Width table present, 0=not present
gui->currentFont.widths = font; // Save pointer to width table
font+= gui->currentFont.number_of_chars; // Increase number of chars
}
else{
gui->currentFont.widths = NULL; // No width table
}
gui->currentFont.offsets = font; // Save pointer to offset table
font += gui->currentFont.offset_size; // Skip offset table
gui->currentFont.data = font; // Save pointer to bitmap data
}
UG_S16 _UG_PutChar( UG_CHAR chr, UG_S16 x, UG_S16 y, UG_COLOR fc, UG_COLOR bc)
{
UG_U16 x0=0,y0=0,i,j,k,bn,fpixels=0,bpixels=0;
UG_S16 c;
UG_U8 b,trans=gui->transparent_font,driver=(gui->driver[DRIVER_FILL_AREA].state & DRIVER_ENABLED);
const UG_U8 * data; // Pointer to current char bitmap
UG_COLOR color;
void(*push_pixels)(UG_SIZE, UG_COLOR) = NULL;
UG_S16 actual_char_width = _UG_GetCharData(chr, &data);
if(actual_char_width==-1)
return -1; // Char not presnt in the font
bn = gui->currentFont.char_width;
if ( !bn ){
return 0;
}
bn >>= 3;
if ( gui->currentFont.char_width % 8 ) bn++;
/* Is hardware acceleration available? */
if (driver)
{
push_pixels = ((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(x,y,x+actual_char_width-1,y+ gui->currentFont.char_height-1);
}
if ( gui->currentFont.font_type == FONT_TYPE_1BPP)
{
for( j=0;j< gui->currentFont.char_height;j++ )
{
c=0;
for( i=0;i<bn;i++ )
{
b = *data++;
for( k=0;(k<8) && c<actual_char_width; k++ )
{
if(b & 0x01 ) // Foreground pixel detected
{
if(driver)
{ // Accelerated output
if(bpixels && !trans) // Draw accumulated background pixels, only if transparent mode disabled
{
push_pixels(bpixels,bc); // Drawing accumulated pixels removes a lot of overhead, drawing speed is at least 3x faster
bpixels=0;
}
if(!fpixels && trans) // Store first foreground pixel position for transparent drawing
{
x0=x+c;
y0=y+j;
}
fpixels++; // Instead writing every pixel, count consecutive pixels, then send accumulated pixels in a single transaction
}
else
{ // Not accelerated output
gui->device->pset(x+c,y+j,fc);
}
}
else // Background pixel detected
{
if(driver)
{ // Accelerated output
if(fpixels) // Draw accumulated foreground pixels
{
if(!trans) // In transparent mode, we don't need to address pixel areas, so just keep pushing pixels
{
push_pixels(fpixels,fc);
fpixels=0;
}
else{ // In transparent mode, drawing needs to be broken in smaller parts, avoiding the background areas
while(fpixels)
{
UG_U16 width = (x+actual_char_width)-x0; // Detect available pixels in the current row from current x position
if(x0==x || fpixels<width) // If pixel draw count is lower than available pixels, or drawing at start of the row, drawn as-is
{
push_pixels = ((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(x0,y0,x0+width-1,y0+(fpixels/actual_char_width));
push_pixels(fpixels,fc);
fpixels=0;
}
else // If pixel draw count is higher than available pixels, there's at least second line, drawn this row first
{
push_pixels = ((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(x0,y0,x0+width-1,y0);
push_pixels(fpixels,fc);
fpixels -= width;
x0=x;
y0++;
}
}
}
}
bpixels++;
}
else if(!trans) // Not accelerated output
{
gui->device->pset(x+c,y+j,bc);
}
}
b >>= 1;
c++;
}
}
}
if(driver){ // After finishing, ensure there're no remaining pixels left, make another pass
if(bpixels && !trans)
{
push_pixels(bpixels,bc);
}
else if(fpixels)
{
if(!trans)
{
push_pixels(fpixels,fc);
}
else
{
while(fpixels)
{
UG_U16 width = (x+actual_char_width)-x0;
if(x0==x || fpixels<width)
{
push_pixels = ((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(x0,y0,x0+width-1,y0+(fpixels/actual_char_width));
push_pixels(fpixels,fc);
fpixels=0;
}
else
{
push_pixels = ((void*(*)(UG_S16, UG_S16, UG_S16, UG_S16))gui->driver[DRIVER_FILL_AREA].driver)(x0,y0,x0+width-1,y0);
push_pixels(fpixels,fc);
fpixels -= width;
x0=x;
y0++;
}
}
}
}
}
}
#if defined(UGUI_USE_COLOR_RGB888) || defined(UGUI_USE_COLOR_RGB565)
else if ( gui->currentFont.font_type == FONT_TYPE_8BPP)
{
for( j=0;j< gui->currentFont.char_height;j++ )
{
for( i=0;i<actual_char_width;i++ )
{
b = *data++;
color = ((((fc & 0xFF) * b + (bc & 0xFF) * (256 - b)) >> 8) & 0xFF) | //Blue component
((((fc & 0xFF00) * b + (bc & 0xFF00) * (256 - b)) >> 8) & 0xFF00) | //Green component
((((fc & 0xFF0000) * b + (bc & 0xFF0000) * (256 - b)) >> 8) & 0xFF0000); //Red component
if(driver)
{
push_pixels(1,color); // Accelerated output
}
else
{
gui->device->pset(x+i,y+j,color); // Not accelerated output
}
}