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ugfx/include/gdisp_emulation.c
Joel Bodenmann 7b277edc59 renamed macros
2012-10-21 01:47:11 +02:00

688 lines
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/*
ChibiOS/GFX - Copyright (C) 2012
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS/GFX.
ChibiOS/GFX is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/GFX is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
Emulation routines included into gdisp_lld.c
*/
/*
Even though this is a software emulation of a low level driver
most validation doesn't need to happen here as eventually
we call a real low level driver routine and if validation is
required - it will do it.
*/
#ifndef GDISP_EMULATION_C
#define GDISP_EMULATION_C
#if GFX_USE_GDISP || defined(__DOXYGEN__)
#ifndef GDISP_LLD_NO_STRUCT
static struct GDISPDriver {
coord_t Width;
coord_t Height;
gdisp_orientation_t Orientation;
gdisp_powermode_t Powermode;
coord_t Backlight;
coord_t Contrast;
#if GDISP_NEED_CLIP || GDISP_NEED_VALIDATION
coord_t clipx0, clipy0;
coord_t clipx1, clipy1; /* not inclusive */
#endif
} GDISP;
#endif
#if !GDISP_HARDWARE_CLEARS
void GDISP_LLD(clear)(color_t color) {
GDISP_LLD(fillarea)(0, 0, GDISP.Width, GDISP.Height, color);
}
#endif
#if !GDISP_HARDWARE_LINES
void GDISP_LLD(drawline)(coord_t x0, coord_t y0, coord_t x1, coord_t y1, color_t color) {
int16_t dy, dx;
int16_t addx, addy;
int16_t P, diff, i;
#if GDISP_HARDWARE_FILLS || GDISP_HARDWARE_SCROLL
// speed improvement if vertical or horizontal
if (x0 == x1) {
if (y1 > y0)
GDISP_LLD(fillarea)(x0, y0, 1, y1-y0+1, color);
else
GDISP_LLD(fillarea)(x0, y1, 1, y0-y1+1, color);
return;
}
if (y0 == y1) {
if (x1 > x0)
GDISP_LLD(fillarea)(x0, y0, x1-x0+1, 1, color);
else
GDISP_LLD(fillarea)(x0, y1, x0-x1+1, 1, color);
return;
}
#endif
if (x1 >= x0) {
dx = x1 - x0;
addx = 1;
} else {
dx = x0 - x1;
addx = -1;
}
if (y1 >= y0) {
dy = y1 - y0;
addy = 1;
} else {
dy = y0 - y1;
addy = -1;
}
if (dx >= dy) {
dy *= 2;
P = dy - dx;
diff = P - dx;
for(i=0; i<=dx; ++i) {
GDISP_LLD(drawpixel)(x0, y0, color);
if (P < 0) {
P += dy;
x0 += addx;
} else {
P += diff;
x0 += addx;
y0 += addy;
}
}
} else {
dx *= 2;
P = dx - dy;
diff = P - dy;
for(i=0; i<=dy; ++i) {
GDISP_LLD(drawpixel)(x0, y0, color);
if (P < 0) {
P += dx;
y0 += addy;
} else {
P += diff;
x0 += addx;
y0 += addy;
}
}
}
}
#endif
#if !GDISP_HARDWARE_FILLS
void GDISP_LLD(fillarea)(coord_t x, coord_t y, coord_t cx, coord_t cy, color_t color) {
#if GDISP_HARDWARE_SCROLL
GDISP_LLD(verticalscroll)(x, y, cx, cy, cy, color);
#elif GDISP_HARDWARE_LINES
coord_t x1, y1;
x1 = x + cx - 1;
y1 = y + cy;
for(; y < y1; y++)
GDISP_LLD(drawline)(x, y, x1, y, color);
#else
coord_t x0, x1, y1;
x0 = x;
x1 = x + cx;
y1 = y + cy;
for(; y < y1; y++)
for(x = x0; x < x1; x++)
GDISP_LLD(drawpixel)(x, y, color);
#endif
}
#endif
#if !GDISP_HARDWARE_BITFILLS
void GDISP_LLD(blitareaex)(coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t srcx, coord_t srcy, coord_t srccx, const pixel_t *buffer) {
coord_t x0, x1, y1;
x0 = x;
x1 = x + cx;
y1 = y + cy;
buffer += srcy*srccx+srcx;
srccx -= cx;
for(; y < y1; y++, buffer += srccx)
for(x=x0; x < x1; x++)
GDISP_LLD(drawpixel)(x, y, *buffer++);
}
#endif
#if GDISP_NEED_CLIP && !GDISP_HARDWARE_CLIP
void GDISP_LLD(setclip)(coord_t x, coord_t y, coord_t cx, coord_t cy) {
#if GDISP_NEED_VALIDATION
if (x >= GDISP.Width || y >= GDISP.Height || cx < 0 || cy < 0)
return;
if (x < 0) x = 0;
if (y < 0) y = 0;
if (x+cx > GDISP.Width) cx = GDISP.Width - x;
if (y+cy > GDISP.Height) cy = GDISP.Height - y;
#endif
GDISP.clipx0 = x;
GDISP.clipy0 = y;
GDISP.clipx1 = x+cx;
GDISP.clipy1 = y+cy;
}
#endif
#if GDISP_NEED_CIRCLE && !GDISP_HARDWARE_CIRCLES
void GDISP_LLD(drawcircle)(coord_t x, coord_t y, coord_t radius, color_t color) {
coord_t a, b, P;
a = 0;
b = radius;
P = 1 - radius;
do {
GDISP_LLD(drawpixel)(x+a, y+b, color);
GDISP_LLD(drawpixel)(x+b, y+a, color);
GDISP_LLD(drawpixel)(x-a, y+b, color);
GDISP_LLD(drawpixel)(x-b, y+a, color);
GDISP_LLD(drawpixel)(x+b, y-a, color);
GDISP_LLD(drawpixel)(x+a, y-b, color);
GDISP_LLD(drawpixel)(x-a, y-b, color);
GDISP_LLD(drawpixel)(x-b, y-a, color);
if (P < 0)
P += 3 + 2*a++;
else
P += 5 + 2*(a++ - b--);
} while(a <= b);
}
#endif
#if GDISP_NEED_CIRCLE && !GDISP_HARDWARE_CIRCLEFILLS
void GDISP_LLD(fillcircle)(coord_t x, coord_t y, coord_t radius, color_t color) {
coord_t a, b, P;
a = 0;
b = radius;
P = 1 - radius;
do {
GDISP_LLD(drawline)(x-a, y+b, x+a, y+b, color);
GDISP_LLD(drawline)(x-a, y-b, x+a, y-b, color);
GDISP_LLD(drawline)(x-b, y+a, x+b, y+a, color);
GDISP_LLD(drawline)(x-b, y-a, x+b, y-a, color);
if (P < 0)
P += 3 + 2*a++;
else
P += 5 + 2*(a++ - b--);
} while(a <= b);
}
#endif
#if GDISP_NEED_ELLIPSE && !GDISP_HARDWARE_ELLIPSES
void GDISP_LLD(drawellipse)(coord_t x, coord_t y, coord_t a, coord_t b, color_t color) {
int dx = 0, dy = b; /* im I. Quadranten von links oben nach rechts unten */
long a2 = a*a, b2 = b*b;
long err = b2-(2*b-1)*a2, e2; /* Fehler im 1. Schritt */
do {
GDISP_LLD(drawpixel)(x+dx, y+dy, color); /* I. Quadrant */
GDISP_LLD(drawpixel)(x-dx, y+dy, color); /* II. Quadrant */
GDISP_LLD(drawpixel)(x-dx, y-dy, color); /* III. Quadrant */
GDISP_LLD(drawpixel)(x+dx, y-dy, color); /* IV. Quadrant */
e2 = 2*err;
if(e2 < (2*dx+1)*b2) {
dx++;
err += (2*dx+1)*b2;
}
if(e2 > -(2*dy-1)*a2) {
dy--;
err -= (2*dy-1)*a2;
}
} while(dy >= 0);
while(dx++ < a) { /* fehlerhafter Abbruch bei flachen Ellipsen (b=1) */
GDISP_LLD(drawpixel)(x+dx, y, color); /* -> Spitze der Ellipse vollenden */
GDISP_LLD(drawpixel)(x-dx, y, color);
}
}
#endif
#if GDISP_NEED_ELLIPSE && !GDISP_HARDWARE_ELLIPSEFILLS
void GDISP_LLD(fillellipse)(coord_t x, coord_t y, coord_t a, coord_t b, color_t color) {
int dx = 0, dy = b; /* im I. Quadranten von links oben nach rechts unten */
long a2 = a*a, b2 = b*b;
long err = b2-(2*b-1)*a2, e2; /* Fehler im 1. Schritt */
do {
GDISP_LLD(drawline)(x-dx,y+dy,x+dx,y+dy, color);
GDISP_LLD(drawline)(x-dx,y-dy,x+dx,y-dy, color);
e2 = 2*err;
if(e2 < (2*dx+1)*b2) {
dx++;
err += (2*dx+1)*b2;
}
if(e2 > -(2*dy-1)*a2) {
dy--;
err -= (2*dy-1)*a2;
}
} while(dy >= 0);
while(dx++ < a) { /* fehlerhafter Abbruch bei flachen Ellipsen (b=1) */
GDISP_LLD(drawpixel)(x+dx, y, color); /* -> Spitze der Ellipse vollenden */
GDISP_LLD(drawpixel)(x-dx, y, color);
}
}
#endif
#if GDISP_NEED_ARC && !GDISP_HARDWARE_ARCS
#include <maths.h>
/*
* @brief Internal helper function for gdispDrawArc()
*
* @note DO NOT USE DIRECTLY!
*
* @param[in] x, y The middle point of the arc
* @param[in] start The start angle of the arc
* @param[in] end The end angle of the arc
* @param[in] radius The radius of the arc
* @param[in] color The color in which the arc will be drawn
*
* @notapi
*/
static void _draw_arc(coord_t x, coord_t y, uint16_t start, uint16_t end, uint16_t radius, color_t color) {
if (start >= 0 && start <= 180) {
float x_maxI = x + radius*cos(start*M_PI/180);
float x_minI;
if (end > 180)
x_minI = x - radius;
else
x_minI = x + radius*cos(end*M_PI/180);
int a = 0;
int b = radius;
int P = 1 - radius;
do {
if(x-a <= x_maxI && x-a >= x_minI)
GDISP_LLD(drawpixel)(x-a, y+b, color);
if(x+a <= x_maxI && x+a >= x_minI)
GDISP_LLD(drawpixel)(x+a, y+b, color);
if(x-b <= x_maxI && x-b >= x_minI)
GDISP_LLD(drawpixel)(x-b, y+a, color);
if(x+b <= x_maxI && x+b >= x_minI)
GDISP_LLD(drawpixel)(x+b, y+a, color);
if (P < 0) {
P = P + 3 + 2*a;
a = a + 1;
} else {
P = P + 5 + 2*(a - b);
a = a + 1;
b = b - 1;
}
} while(a <= b);
}
if (end > 180 && end <= 360) {
float x_maxII = x+radius*cos(end*M_PI/180);
float x_minII;
if(start <= 180)
x_minII = x - radius;
else
x_minII = x+radius*cos(start*M_PI/180);
int a = 0;
int b = radius;
int P = 1 - radius;
do {
if(x-a <= x_maxII && x-a >= x_minII)
GDISP_LLD(drawpixel)(x-a, y-b, color);
if(x+a <= x_maxII && x+a >= x_minII)
GDISP_LLD(drawpixel)(x+a, y-b, color);
if(x-b <= x_maxII && x-b >= x_minII)
GDISP_LLD(drawpixel)(x-b, y-a, color);
if(x+b <= x_maxII && x+b >= x_minII)
GDISP_LLD(drawpixel)(x+b, y-a, color);
if (P < 0) {
P = P + 3 + 2*a;
a = a + 1;
} else {
P = P + 5 + 2*(a - b);
a = a + 1;
b = b - 1;
}
} while (a <= b);
}
}
void GDISP_LLD(drawarc)(coord_t x, coord_t y, coord_t radius, coord_t startangle, coord_t endangle, color_t color) {
if(endangle < startangle) {
_draw_arc(x, y, startangle, 360, radius, color);
_draw_arc(x, y, 0, endangle, radius, color);
} else {
_draw_arc(x, y, startangle, endangle, radius, color);
}
}
#endif
#if GDISP_NEED_ARC && !GDISP_HARDWARE_ARCFILLS
void GDISP_LLD(fillarc)(coord_t x, coord_t y, coord_t radius, coord_t startangle, coord_t endangle, color_t color) {
(void)x;
(void)y;
(void)radius;
(void)startangle;
(void)endangle;
(void)color;
#warning "GDISP: FillArc Emulation Not Implemented Yet"
}
#endif
#if GDISP_NEED_TEXT && !GDISP_HARDWARE_TEXT
#include "gdisp_fonts.h"
#endif
#if GDISP_NEED_TEXT && !GDISP_HARDWARE_TEXT
void GDISP_LLD(drawchar)(coord_t x, coord_t y, char c, font_t font, color_t color) {
const fontcolumn_t *ptr;
fontcolumn_t column;
coord_t width, height, xscale, yscale;
coord_t i, j, xs, ys;
/* Check we actually have something to print */
width = _getCharWidth(font, c);
if (!width) return;
xscale = font->xscale;
yscale = font->yscale;
height = font->height * yscale;
width *= xscale;
ptr = _getCharData(font, c);
/* Loop through the data and display. The font data is LSBit first, down the column */
for(i=0; i < width; i+=xscale) {
/* Get the font bitmap data for the column */
column = *ptr++;
/* Draw each pixel */
for(j=0; j < height; j+=yscale, column >>= 1) {
if (column & 0x01) {
for(xs=0; xs < xscale; xs++)
for(ys=0; ys < yscale; ys++)
GDISP_LLD(drawpixel)(x+i+xs, y+j+ys, color);
}
}
}
}
#endif
#if GDISP_NEED_TEXT && !GDISP_HARDWARE_TEXTFILLS
void GDISP_LLD(fillchar)(coord_t x, coord_t y, char c, font_t font, color_t color, color_t bgcolor) {
coord_t width, height;
coord_t xscale, yscale;
/* Check we actually have something to print */
width = _getCharWidth(font, c);
if (!width) return;
xscale = font->xscale;
yscale = font->yscale;
height = font->height * yscale;
width *= xscale;
/* Method 1: Use background fill and then draw the text */
#if GDISP_HARDWARE_TEXT || GDISP_SOFTWARE_TEXTFILLDRAW
/* Fill the area */
GDISP_LLD(fillarea)(x, y, width, height, bgcolor);
/* Draw the text */
GDISP_LLD(drawchar)(x, y, c, font, color);
/* Method 2: Create a single column bitmap and then blit it */
#elif GDISP_HARDWARE_BITFILLS && GDISP_SOFTWARE_TEXTBLITCOLUMN
{
const fontcolumn_t *ptr;
fontcolumn_t column;
coord_t i, j, xs, ys;
/* Working buffer for fast non-transparent text rendering [patch by Badger]
This needs to be larger than the largest character we can print.
Assume the max is double sized by one column.
*/
static pixel_t buf[sizeof(fontcolumn_t)*8*2];
#if GDISP_NEED_VALIDATION
/* Check our buffer is big enough */
if ((unsigned)height > sizeof(buf)/sizeof(buf[0])) return;
#endif
ptr = _getCharData(font, c);
/* Loop through the data and display. The font data is LSBit first, down the column */
for(i = 0; i < width; i+=xscale) {
/* Get the font bitmap data for the column */
column = *ptr++;
/* Draw each pixel */
for(j = 0; j < height; j+=yscale, column >>= 1) {
if (column & 0x01) {
for(ys=0; ys < yscale; ys++)
gdispPackPixels(buf, 1, j+ys, 0, color);
} else {
for(ys=0; ys < yscale; ys++)
gdispPackPixels(buf, 1, j+ys, 0, bgcolor);
}
}
for(xs=0; xs < xscale; xs++)
GDISP_LLD(blitareaex)(x+i+xs, y, 1, height, 0, 0, 1, buf);
}
}
/* Method 3: Create a character bitmap and then blit it */
#elif GDISP_HARDWARE_BITFILLS
{
const fontcolumn_t *ptr;
fontcolumn_t column;
coord_t i, j, xs, ys;
/* Working buffer for fast non-transparent text rendering [patch by Badger]
This needs to be larger than the largest character we can print.
Assume the max is double sized.
*/
static pixel_t buf[20*(sizeof(fontcolumn_t)*8)*2];
#if GDISP_NEED_VALIDATION
/* Check our buffer is big enough */
if ((unsigned)(width * height) > sizeof(buf)/sizeof(buf[0])) return;
#endif
ptr = _getCharData(font, c);
/* Loop through the data and display. The font data is LSBit first, down the column */
for(i = 0; i < width; i+=xscale) {
/* Get the font bitmap data for the column */
column = *ptr++;
/* Draw each pixel */
for(j = 0; j < height; j+=yscale, column >>= 1) {
if (column & 0x01) {
for(xs=0; xs < xscale; xs++)
for(ys=0; ys < yscale; ys++)
gdispPackPixels(buf, width, i+xs, j+ys, color);
} else {
for(xs=0; xs < xscale; xs++)
for(ys=0; ys < yscale; ys++)
gdispPackPixels(buf, width, i+xs, j+ys, bgcolor);
}
}
}
/* [Patch by Badger] Write all in one stroke */
GDISP_LLD(blitareaex)(x, y, width, height, 0, 0, width, buf);
}
/* Method 4: Draw pixel by pixel */
#else
{
const fontcolumn_t *ptr;
fontcolumn_t column;
coord_t i, j, xs, ys;
ptr = _getCharData(font, c);
/* Loop through the data and display. The font data is LSBit first, down the column */
for(i = 0; i < width; i+=xscale) {
/* Get the font bitmap data for the column */
column = *ptr++;
/* Draw each pixel */
for(j = 0; j < height; j+=yscale, column >>= 1) {
if (column & 0x01) {
for(xs=0; xs < xscale; xs++)
for(ys=0; ys < yscale; ys++)
GDISP_LLD(drawpixel)(x+i+xs, y+j+ys, color);
} else {
for(xs=0; xs < xscale; xs++)
for(ys=0; ys < yscale; ys++)
GDISP_LLD(drawpixel)(x+i+xs, y+j+ys, bgcolor);
}
}
}
}
#endif
}
#endif
#if GDISP_NEED_CONTROL && !GDISP_HARDWARE_CONTROL
void GDISP_LLD(control)(unsigned what, void *value) {
(void)what;
(void)value;
/* Ignore everything */
}
#endif
#if GDISP_NEED_QUERY && !GDISP_HARDWARE_QUERY
void *GDISP_LLD(query)(unsigned what) {
switch(what) {
case GDISP_QUERY_WIDTH: return (void *)(unsigned)GDISP.Width;
case GDISP_QUERY_HEIGHT: return (void *)(unsigned)GDISP.Height;
case GDISP_QUERY_POWER: return (void *)(unsigned)GDISP.Powermode;
case GDISP_QUERY_ORIENTATION: return (void *)(unsigned)GDISP.Orientation;
case GDISP_QUERY_BACKLIGHT: return (void *)(unsigned)GDISP.Backlight;
case GDISP_QUERY_CONTRAST: return (void *)(unsigned)GDISP.Contrast;
default: return (void *)-1;
}
}
#endif
#if GDISP_NEED_MSGAPI
void GDISP_LLD(msgdispatch)(gdisp_lld_msg_t *msg) {
switch(msg->action) {
case GDISP_LLD_MSG_NOP:
break;
case GDISP_LLD_MSG_INIT:
GDISP_LLD(init)();
break;
case GDISP_LLD_MSG_CLEAR:
GDISP_LLD(clear)(msg->clear.color);
break;
case GDISP_LLD_MSG_DRAWPIXEL:
GDISP_LLD(drawpixel)(msg->drawpixel.x, msg->drawpixel.y, msg->drawpixel.color);
break;
case GDISP_LLD_MSG_FILLAREA:
GDISP_LLD(fillarea)(msg->fillarea.x, msg->fillarea.y, msg->fillarea.cx, msg->fillarea.cy, msg->fillarea.color);
break;
case GDISP_LLD_MSG_BLITAREA:
GDISP_LLD(blitareaex)(msg->blitarea.x, msg->blitarea.y, msg->blitarea.cx, msg->blitarea.cy, msg->blitarea.srcx, msg->blitarea.srcy, msg->blitarea.srccx, msg->blitarea.buffer);
break;
case GDISP_LLD_MSG_DRAWLINE:
GDISP_LLD(drawline)(msg->drawline.x0, msg->drawline.y0, msg->drawline.x1, msg->drawline.y1, msg->drawline.color);
break;
#if GDISP_NEED_CLIP
case GDISP_LLD_MSG_SETCLIP:
GDISP_LLD(setclip)(msg->setclip.x, msg->setclip.y, msg->setclip.cx, msg->setclip.cy);
break;
#endif
#if GDISP_NEED_CIRCLE
case GDISP_LLD_MSG_DRAWCIRCLE:
GDISP_LLD(drawcircle)(msg->drawcircle.x, msg->drawcircle.y, msg->drawcircle.radius, msg->drawcircle.color);
break;
case GDISP_LLD_MSG_FILLCIRCLE:
GDISP_LLD(fillcircle)(msg->fillcircle.x, msg->fillcircle.y, msg->fillcircle.radius, msg->fillcircle.color);
break;
#endif
#if GDISP_NEED_ELLIPSE
case GDISP_LLD_MSG_DRAWELLIPSE:
GDISP_LLD(drawellipse)(msg->drawellipse.x, msg->drawellipse.y, msg->drawellipse.a, msg->drawellipse.b, msg->drawellipse.color);
break;
case GDISP_LLD_MSG_FILLELLIPSE:
GDISP_LLD(fillellipse)(msg->fillellipse.x, msg->fillellipse.y, msg->fillellipse.a, msg->fillellipse.b, msg->fillellipse.color);
break;
#endif
#if GDISP_NEED_ARC
case GDISP_LLD_MSG_DRAWARC:
GDISP_LLD(drawcircle)(msg->drawarc.x, msg->drawarc.y, msg->drawarc.radius, msg->drawarc.startangle, msg->drawarc.endangle, msg->drawarc.color);
break;
case GDISP_LLD_MSG_FILLARC:
GDISP_LLD(fillcircle)(msg->fillarc.x, msg->fillarc.y, msg->fillarc.radius, msg->fillarc.startangle, msg->fillarc.endangle, msg->fillarc.color);
break;
#endif
#if GDISP_NEED_TEXT
case GDISP_LLD_MSG_DRAWCHAR:
GDISP_LLD(drawchar)(msg->drawchar.x, msg->drawchar.y, msg->drawchar.c, msg->drawchar.font, msg->drawchar.color);
break;
case GDISP_LLD_MSG_FILLCHAR:
GDISP_LLD(fillchar)(msg->fillchar.x, msg->fillchar.y, msg->fillchar.c, msg->fillchar.font, msg->fillchar.color, msg->fillchar.bgcolor);
break;
#endif
#if GDISP_NEED_PIXELREAD
case GDISP_LLD_MSG_GETPIXELCOLOR:
msg->getpixelcolor.result = GDISP_LLD(getpixelcolor)(msg->getpixelcolor.x, msg->getpixelcolor.y);
break;
#endif
#if GDISP_NEED_SCROLL
case GDISP_LLD_MSG_VERTICALSCROLL:
GDISP_LLD(verticalscroll)(msg->verticalscroll.x, msg->verticalscroll.y, msg->verticalscroll.cx, msg->verticalscroll.cy, msg->verticalscroll.lines, msg->verticalscroll.bgcolor);
break;
#endif
#if GDISP_NEED_CONTROL
case GDISP_LLD_MSG_CONTROL:
GDISP_LLD(control)(msg->control.what, msg->control.value);
break;
#endif
#if GDISP_NEED_QUERY
case GDISP_LLD_MSG_QUERY:
msg->query.result = GDISP_LLD(query)(msg->query.what);
break;
#endif
}
}
#endif
#endif /* GFX_USE_GDISP */
#endif /* GDISP_EMULATION_C */
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