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GWIN Graph - use GDISP point definition

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Andrew Hannam 2013-03-18 18:28:31 +10:00
parent cc5729dedd
commit d678352b9a
2 changed files with 569 additions and 570 deletions
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415
include/gwin/graph.h
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@ -1,208 +1,207 @@
/*
ChibiOS/GFX - Copyright (C) 2012, 2013
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/>.
*/
/**
* @file include/gwin/graph.h
* @brief GWIN GRAPH module header file.
*
* @defgroup Graph Graph
* @ingroup GWIN
*
* @details GWIN allows it to easily draw graphs.
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @pre GWIN_NEED_GRAPH must be set to TRUE in your gfxconf.h
*
* @{
*/
#ifndef _GWIN_GRAPH_H
#define _GWIN_GRAPH_H
#if GWIN_NEED_GRAPH || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define GW_GRAPH 0x0003
/*===========================================================================*/
/* Type definitions */
/*===========================================================================*/
typedef struct GGraphPoint_t {
coord_t x, y;
} GGraphPoint;
typedef enum GGraphPointType_e {
GGRAPH_POINT_NONE, GGRAPH_POINT_DOT, GGRAPH_POINT_SQUARE, GGRAPH_POINT_CIRCLE
} GGraphPointType;
typedef struct GGraphPointStyle_t {
GGraphPointType type;
coord_t size;
color_t color;
} GGraphPointStyle;
typedef enum GGraphLineType_e {
GGRAPH_LINE_NONE, GGRAPH_LINE_SOLID, GGRAPH_LINE_DOT, GGRAPH_LINE_DASH
} GGraphLineType;
typedef struct GGraphLineStyle_t {
GGraphLineType type;
coord_t size;
color_t color;
} GGraphLineStyle;
typedef struct GGraphGridStyle_t {
GGraphLineType type;
coord_t size;
color_t color;
coord_t spacing;
} GGraphGridStyle;
typedef struct GGraphStyle_t {
GGraphPointStyle point;
GGraphLineStyle line;
GGraphLineStyle xaxis;
GGraphLineStyle yaxis;
GGraphGridStyle xgrid;
GGraphGridStyle ygrid;
uint16_t flags;
#define GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS 0x0001
#define GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS 0x0002
#define GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS 0x0004
#define GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS 0x0008
#define GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)
#define GWIN_GRAPH_STYLE_NEGATIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_XAXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_YAXIS_ARROWS (GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_ALL_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS)
} GGraphStyle;
// A graph window
typedef struct GGraphObject_t {
GWindowObject gwin;
GGraphStyle style;
coord_t xorigin, yorigin;
coord_t lastx, lasty;
} GGraphObject;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a graph window.
* @return NULL if there is no resultant drawing area, otherwise a window handle.
*
* @param[in] gg The GGraphObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] x,y The screen co-ordinates for the bottom left corner of the window
* @param[in] width The width of the window
* @param[in] height The height of the window
* @note The console is not automatically cleared on creation. You must do that by calling gwinClear() (possibly after changing your background color)
* @note The coordinate system within the window for graphing operations (but not for any other drawing
* operation) is relative to the bottom left corner and then shifted right and up by the specified
* graphing x and y origin. Note that this system is inverted in the y direction relative to the display.
* This gives the best graphing arrangement ie. increasing y values are closer to the top of the display.
*
* @api
*/
GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height);
/**
* @brief Set the style of the graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] pstyle The graph style to set.
* @note The graph is not automatically redrawn. The new style will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle);
/**
* @brief Set the origin for graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new origin for the graph (in graph coordinates relative to the bottom left corner).
* @note The graph is not automatically redrawn. The new origin will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y);
/**
* @brief Draw the axis and the background grid.
*
* @param[in] gh The window handle (must be a graph window)
* @note The graph is not automatically cleared. You must do that first by calling gwinClear().
*
* @api
*/
void gwinGraphDrawAxis(GHandle gh);
/**
* @brief Start a new set of graphing data.
* @details This prevents a line being drawn from the last data point to the next point to be drawn.
*
* @param[in] gh The window handle (must be a graph window)
*
* @api
*/
void gwinGraphStartSet(GHandle gh);
/**
* @brief Draw a graph point.
* @details A graph point and a line connecting to the previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new point for the graph.
*
* @api
*/
void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y);
/**
* @brief Draw multiple graph points.
* @details A graph point and a line connecting to each previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] points The array of points for the graph.
* @param[in] count The number of points in the array.
* @note This is slightly more efficient than calling gwinGraphDrawPoint() repeatedly.
*
* @api
*/
void gwinGraphDrawPoints(GHandle gh, const GGraphPoint *points, unsigned count);
#ifdef __cplusplus
}
#endif
#endif /* GWIN_NEED_GRAPH */
#endif /* _GWIN_GRAPH_H */
/** @} */
/*
ChibiOS/GFX - Copyright (C) 2012, 2013
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/>.
*/
/**
* @file include/gwin/graph.h
* @brief GWIN GRAPH module header file.
*
* @defgroup Graph Graph
* @ingroup GWIN
*
* @details GWIN allows it to easily draw graphs.
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @pre GWIN_NEED_GRAPH must be set to TRUE in your gfxconf.h
*
* @{
*/
#ifndef _GWIN_GRAPH_H
#define _GWIN_GRAPH_H
#if GWIN_NEED_GRAPH || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define GW_GRAPH 0x0003
/*===========================================================================*/
/* Type definitions */
/*===========================================================================*/
// GDISP now has its own point structure
#define GGraphPoint point
typedef enum GGraphPointType_e {
GGRAPH_POINT_NONE, GGRAPH_POINT_DOT, GGRAPH_POINT_SQUARE, GGRAPH_POINT_CIRCLE
} GGraphPointType;
typedef struct GGraphPointStyle_t {
GGraphPointType type;
coord_t size;
color_t color;
} GGraphPointStyle;
typedef enum GGraphLineType_e {
GGRAPH_LINE_NONE, GGRAPH_LINE_SOLID, GGRAPH_LINE_DOT, GGRAPH_LINE_DASH
} GGraphLineType;
typedef struct GGraphLineStyle_t {
GGraphLineType type;
coord_t size;
color_t color;
} GGraphLineStyle;
typedef struct GGraphGridStyle_t {
GGraphLineType type;
coord_t size;
color_t color;
coord_t spacing;
} GGraphGridStyle;
typedef struct GGraphStyle_t {
GGraphPointStyle point;
GGraphLineStyle line;
GGraphLineStyle xaxis;
GGraphLineStyle yaxis;
GGraphGridStyle xgrid;
GGraphGridStyle ygrid;
uint16_t flags;
#define GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS 0x0001
#define GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS 0x0002
#define GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS 0x0004
#define GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS 0x0008
#define GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)
#define GWIN_GRAPH_STYLE_NEGATIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_XAXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_YAXIS_ARROWS (GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_ALL_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS)
} GGraphStyle;
// A graph window
typedef struct GGraphObject_t {
GWindowObject gwin;
GGraphStyle style;
coord_t xorigin, yorigin;
coord_t lastx, lasty;
} GGraphObject;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a graph window.
* @return NULL if there is no resultant drawing area, otherwise a window handle.
*
* @param[in] gg The GGraphObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] x,y The screen co-ordinates for the bottom left corner of the window
* @param[in] width The width of the window
* @param[in] height The height of the window
* @note The console is not automatically cleared on creation. You must do that by calling gwinClear() (possibly after changing your background color)
* @note The coordinate system within the window for graphing operations (but not for any other drawing
* operation) is relative to the bottom left corner and then shifted right and up by the specified
* graphing x and y origin. Note that this system is inverted in the y direction relative to the display.
* This gives the best graphing arrangement ie. increasing y values are closer to the top of the display.
*
* @api
*/
GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height);
/**
* @brief Set the style of the graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] pstyle The graph style to set.
* @note The graph is not automatically redrawn. The new style will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle);
/**
* @brief Set the origin for graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new origin for the graph (in graph coordinates relative to the bottom left corner).
* @note The graph is not automatically redrawn. The new origin will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y);
/**
* @brief Draw the axis and the background grid.
*
* @param[in] gh The window handle (must be a graph window)
* @note The graph is not automatically cleared. You must do that first by calling gwinClear().
*
* @api
*/
void gwinGraphDrawAxis(GHandle gh);
/**
* @brief Start a new set of graphing data.
* @details This prevents a line being drawn from the last data point to the next point to be drawn.
*
* @param[in] gh The window handle (must be a graph window)
*
* @api
*/
void gwinGraphStartSet(GHandle gh);
/**
* @brief Draw a graph point.
* @details A graph point and a line connecting to the previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new point for the graph.
*
* @api
*/
void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y);
/**
* @brief Draw multiple graph points.
* @details A graph point and a line connecting to each previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] points The array of points for the graph.
* @param[in] count The number of points in the array.
* @note This is slightly more efficient than calling gwinGraphDrawPoint() repeatedly.
*
* @api
*/
void gwinGraphDrawPoints(GHandle gh, const point *points, unsigned count);
#ifdef __cplusplus
}
#endif
#endif /* GWIN_NEED_GRAPH */
#endif /* _GWIN_GRAPH_H */
/** @} */

724
src/gwin/graph.c
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@ -1,362 +1,362 @@
/*
ChibiOS/GFX - Copyright (C) 2012, 2013
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/>.
*/
/**
* @file src/gwin/graph.c
* @brief GWIN sub-system button code.
*
* @defgroup Graph Graph
* @ingroup GWIN
*
* @{
*/
#include "ch.h"
#include "hal.h"
#include "gfx.h"
#if (GFX_USE_GWIN && GWIN_NEED_GRAPH) || defined(__DOXYGEN__)
#include "gwin/internal.h"
#define GGRAPH_FLG_CONNECTPOINTS (GWIN_FIRST_CONTROL_FLAG<<0)
#define GGRAPH_ARROW_SIZE 5
static const GGraphStyle GGraphDefaultStyle = {
{ GGRAPH_POINT_DOT, 0, White }, // point
{ GGRAPH_LINE_DOT, 2, Gray }, // line
{ GGRAPH_LINE_SOLID, 0, White }, // x axis
{ GGRAPH_LINE_SOLID, 0, White }, // y axis
{ GGRAPH_LINE_NONE, 0, White, 0 }, // x grid
{ GGRAPH_LINE_NONE, 0, White, 0 }, // y grid
GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS // flags
};
static void pointto(GGraphObject *gg, coord_t x, coord_t y, const GGraphPointStyle *style) {
if (style->type == GGRAPH_POINT_NONE)
return;
// Convert to device space. Note the y-axis is inverted.
x += gg->gwin.x + gg->xorigin;
y = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y;
if (style->size <= 1) {
gdispDrawPixel(x, y, style->color);
return;
}
switch(style->type) {
case GGRAPH_POINT_SQUARE:
gdispDrawBox(x-style->size, y-style->size, 2*style->size, 2*style->size, style->color);
break;
#if GDISP_NEED_CIRCLE
case GGRAPH_POINT_CIRCLE:
gdispDrawCircle(x, y, style->size, style->color);
break;
#endif
case GGRAPH_POINT_DOT:
default:
gdispDrawPixel(x, y, style->color);
break;
}
}
static void lineto(GGraphObject *gg, coord_t x0, coord_t y0, coord_t x1, coord_t y1, const GGraphLineStyle *style) {
coord_t dy, dx;
coord_t addx, addy;
coord_t P, diff, i;
coord_t run_on, run_off, run;
if (style->type == GGRAPH_LINE_NONE)
return;
// Convert to device space. Note the y-axis is inverted.
x0 += gg->gwin.x + gg->xorigin;
y0 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y0;
x1 += gg->gwin.x + gg->xorigin;
y1 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y1;
if (style->size <= 0) {
// Use the driver to draw a solid line
gdispDrawLine(x0, y0, x1, y1, style->color);
return;
}
switch (style->type) {
case GGRAPH_LINE_DOT:
run_on = 1;
run_off = -style->size;
break;
case GGRAPH_LINE_DASH:
run_on = style->size;
run_off = -style->size;
break;
case GGRAPH_LINE_SOLID:
default:
// Use the driver to draw a solid line
gdispDrawLine(x0, y0, x1, y1, style->color);
return;
}
// Use Bresenham's algorithm modified to draw a stylized line
run = 0;
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) {
if (run++ >= 0) {
if (run >= run_on)
run = run_off;
gdispDrawPixel(x0, y0, style->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) {
if (run++ >= 0) {
if (run >= run_on)
run = run_off;
gdispDrawPixel(x0, y0, style->color);
}
if (P < 0) {
P += dx;
y0 += addy;
} else {
P += diff;
x0 += addx;
y0 += addy;
}
}
}
}
GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height) {
if (!(gg = (GGraphObject *)_gwinInit((GWindowObject *)gg, x, y, width, height, sizeof(GGraphObject))))
return 0;
gg->gwin.type = GW_GRAPH;
gg->xorigin = gg->yorigin = 0;
gg->lastx = gg->lasty = 0;
gwinGraphSetStyle(&gg->gwin, &GGraphDefaultStyle);
return (GHandle)gg;
}
void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
gg->style.point.type = pstyle->point.type;
gg->style.point.size = pstyle->point.size;
gg->style.point.color = pstyle->point.color;
gg->style.line.type = pstyle->line.type;
gg->style.line.size = pstyle->line.size;
gg->style.line.color = pstyle->line.color;
gg->style.xaxis.type = pstyle->xaxis.type;
gg->style.xaxis.size = pstyle->xaxis.size;
gg->style.xaxis.color = pstyle->xaxis.color;
gg->style.yaxis.type = pstyle->yaxis.type;
gg->style.yaxis.size = pstyle->yaxis.size;
gg->style.yaxis.color = pstyle->yaxis.color;
gg->style.xgrid.type = pstyle->xgrid.type;
gg->style.xgrid.size = pstyle->xgrid.size;
gg->style.xgrid.color = pstyle->xgrid.color;
gg->style.xgrid.spacing = pstyle->xgrid.spacing;
gg->style.ygrid.type = pstyle->ygrid.type;
gg->style.ygrid.size = pstyle->ygrid.size;
gg->style.ygrid.color = pstyle->ygrid.color;
gg->style.ygrid.spacing = pstyle->ygrid.spacing;
gg->style.flags = pstyle->flags;
#undef gg
}
void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
gg->xorigin = x;
gg->yorigin = y;
#undef gg
}
void gwinGraphDrawAxis(GHandle gh) {
#define gg ((GGraphObject *)gh)
coord_t i, xmin, ymin, xmax, ymax;
if (gh->type != GW_GRAPH)
return;
xmin = -gg->xorigin;
xmax = gh->width-gg->xorigin-1;
ymin = -gg->yorigin;
ymax = gh->height-gg->yorigin-1;
// x grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.xgrid.type != GGRAPH_LINE_NONE && gg->style.xgrid.spacing >= 2) {
for(i = gg->style.xgrid.spacing; i <= xmax; i += gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
for(i = -gg->style.xgrid.spacing; i >= xmin; i -= gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
}
// y grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.ygrid.type != GGRAPH_LINE_NONE && gg->style.ygrid.spacing >= 2) {
for(i = gg->style.ygrid.spacing; i <= ymax; i += gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
for(i = -gg->style.ygrid.spacing; i >= ymin; i -= gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
}
// x axis
lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)) {
if (xmin > 0 || xmin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS)) {
if (xmax < 0 || xmax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
// y axis
lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)) {
if (ymin > 0 || ymin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymin, GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymin, -GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)) {
if (ymax < 0 || ymax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymax, GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymax, -GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
#undef gg
}
void gwinGraphStartSet(GHandle gh) {
if (gh->type != GW_GRAPH)
return;
gh->flags &= ~GGRAPH_FLG_CONNECTPOINTS;
}
void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, x, y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = x;
gg->lasty = y;
// Draw this point.
pointto(gg, x, y, &gg->style.point);
#undef gg
}
void gwinGraphDrawPoints(GHandle gh, const GGraphPoint *points, unsigned count) {
#define gg ((GGraphObject *)gh)
unsigned i;
const GGraphPoint *p;
if (gh->type != GW_GRAPH)
return;
// Draw the connecting lines
for(p = points, i = 0; i < count; p++, i++) {
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, p->x, p->y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
if (i == 0)
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = p->x;
gg->lasty = p->y;
}
// Draw the points.
for(p = points, i = 0; i < count; p++, i++)
pointto(gg, p->x, p->y, &gg->style.point);
#undef gg
}
#endif /* GFX_USE_GWIN && GWIN_NEED_GRAPH */
/** @} */
/*
ChibiOS/GFX - Copyright (C) 2012, 2013
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/>.
*/
/**
* @file src/gwin/graph.c
* @brief GWIN sub-system button code.
*
* @defgroup Graph Graph
* @ingroup GWIN
*
* @{
*/
#include "ch.h"
#include "hal.h"
#include "gfx.h"
#if (GFX_USE_GWIN && GWIN_NEED_GRAPH) || defined(__DOXYGEN__)
#include "gwin/internal.h"
#define GGRAPH_FLG_CONNECTPOINTS (GWIN_FIRST_CONTROL_FLAG<<0)
#define GGRAPH_ARROW_SIZE 5
static const GGraphStyle GGraphDefaultStyle = {
{ GGRAPH_POINT_DOT, 0, White }, // point
{ GGRAPH_LINE_DOT, 2, Gray }, // line
{ GGRAPH_LINE_SOLID, 0, White }, // x axis
{ GGRAPH_LINE_SOLID, 0, White }, // y axis
{ GGRAPH_LINE_NONE, 0, White, 0 }, // x grid
{ GGRAPH_LINE_NONE, 0, White, 0 }, // y grid
GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS // flags
};
static void pointto(GGraphObject *gg, coord_t x, coord_t y, const GGraphPointStyle *style) {
if (style->type == GGRAPH_POINT_NONE)
return;
// Convert to device space. Note the y-axis is inverted.
x += gg->gwin.x + gg->xorigin;
y = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y;
if (style->size <= 1) {
gdispDrawPixel(x, y, style->color);
return;
}
switch(style->type) {
case GGRAPH_POINT_SQUARE:
gdispDrawBox(x-style->size, y-style->size, 2*style->size, 2*style->size, style->color);
break;
#if GDISP_NEED_CIRCLE
case GGRAPH_POINT_CIRCLE:
gdispDrawCircle(x, y, style->size, style->color);
break;
#endif
case GGRAPH_POINT_DOT:
default:
gdispDrawPixel(x, y, style->color);
break;
}
}
static void lineto(GGraphObject *gg, coord_t x0, coord_t y0, coord_t x1, coord_t y1, const GGraphLineStyle *style) {
coord_t dy, dx;
coord_t addx, addy;
coord_t P, diff, i;
coord_t run_on, run_off, run;
if (style->type == GGRAPH_LINE_NONE)
return;
// Convert to device space. Note the y-axis is inverted.
x0 += gg->gwin.x + gg->xorigin;
y0 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y0;
x1 += gg->gwin.x + gg->xorigin;
y1 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y1;
if (style->size <= 0) {
// Use the driver to draw a solid line
gdispDrawLine(x0, y0, x1, y1, style->color);
return;
}
switch (style->type) {
case GGRAPH_LINE_DOT:
run_on = 1;
run_off = -style->size;
break;
case GGRAPH_LINE_DASH:
run_on = style->size;
run_off = -style->size;
break;
case GGRAPH_LINE_SOLID:
default:
// Use the driver to draw a solid line
gdispDrawLine(x0, y0, x1, y1, style->color);
return;
}
// Use Bresenham's algorithm modified to draw a stylized line
run = 0;
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) {
if (run++ >= 0) {
if (run >= run_on)
run = run_off;
gdispDrawPixel(x0, y0, style->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) {
if (run++ >= 0) {
if (run >= run_on)
run = run_off;
gdispDrawPixel(x0, y0, style->color);
}
if (P < 0) {
P += dx;
y0 += addy;
} else {
P += diff;
x0 += addx;
y0 += addy;
}
}
}
}
GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height) {
if (!(gg = (GGraphObject *)_gwinInit((GWindowObject *)gg, x, y, width, height, sizeof(GGraphObject))))
return 0;
gg->gwin.type = GW_GRAPH;
gg->xorigin = gg->yorigin = 0;
gg->lastx = gg->lasty = 0;
gwinGraphSetStyle(&gg->gwin, &GGraphDefaultStyle);
return (GHandle)gg;
}
void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
gg->style.point.type = pstyle->point.type;
gg->style.point.size = pstyle->point.size;
gg->style.point.color = pstyle->point.color;
gg->style.line.type = pstyle->line.type;
gg->style.line.size = pstyle->line.size;
gg->style.line.color = pstyle->line.color;
gg->style.xaxis.type = pstyle->xaxis.type;
gg->style.xaxis.size = pstyle->xaxis.size;
gg->style.xaxis.color = pstyle->xaxis.color;
gg->style.yaxis.type = pstyle->yaxis.type;
gg->style.yaxis.size = pstyle->yaxis.size;
gg->style.yaxis.color = pstyle->yaxis.color;
gg->style.xgrid.type = pstyle->xgrid.type;
gg->style.xgrid.size = pstyle->xgrid.size;
gg->style.xgrid.color = pstyle->xgrid.color;
gg->style.xgrid.spacing = pstyle->xgrid.spacing;
gg->style.ygrid.type = pstyle->ygrid.type;
gg->style.ygrid.size = pstyle->ygrid.size;
gg->style.ygrid.color = pstyle->ygrid.color;
gg->style.ygrid.spacing = pstyle->ygrid.spacing;
gg->style.flags = pstyle->flags;
#undef gg
}
void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
gg->xorigin = x;
gg->yorigin = y;
#undef gg
}
void gwinGraphDrawAxis(GHandle gh) {
#define gg ((GGraphObject *)gh)
coord_t i, xmin, ymin, xmax, ymax;
if (gh->type != GW_GRAPH)
return;
xmin = -gg->xorigin;
xmax = gh->width-gg->xorigin-1;
ymin = -gg->yorigin;
ymax = gh->height-gg->yorigin-1;
// x grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.xgrid.type != GGRAPH_LINE_NONE && gg->style.xgrid.spacing >= 2) {
for(i = gg->style.xgrid.spacing; i <= xmax; i += gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
for(i = -gg->style.xgrid.spacing; i >= xmin; i -= gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
}
// y grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.ygrid.type != GGRAPH_LINE_NONE && gg->style.ygrid.spacing >= 2) {
for(i = gg->style.ygrid.spacing; i <= ymax; i += gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
for(i = -gg->style.ygrid.spacing; i >= ymin; i -= gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
}
// x axis
lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)) {
if (xmin > 0 || xmin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS)) {
if (xmax < 0 || xmax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
// y axis
lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)) {
if (ymin > 0 || ymin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymin, GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymin, -GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)) {
if (ymax < 0 || ymax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymax, GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymax, -GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
#undef gg
}
void gwinGraphStartSet(GHandle gh) {
if (gh->type != GW_GRAPH)
return;
gh->flags &= ~GGRAPH_FLG_CONNECTPOINTS;
}
void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y) {
#define gg ((GGraphObject *)gh)
if (gh->type != GW_GRAPH)
return;
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, x, y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = x;
gg->lasty = y;
// Draw this point.
pointto(gg, x, y, &gg->style.point);
#undef gg
}
void gwinGraphDrawPoints(GHandle gh, const point *points, unsigned count) {
#define gg ((GGraphObject *)gh)
unsigned i;
const point *p;
if (gh->type != GW_GRAPH)
return;
// Draw the connecting lines
for(p = points, i = 0; i < count; p++, i++) {
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, p->x, p->y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
if (i == 0)
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = p->x;
gg->lasty = p->y;
}
// Draw the points.
for(p = points, i = 0; i < count; p++, i++)
pointto(gg, p->x, p->y, &gg->style.point);
#undef gg
}
#endif /* GFX_USE_GWIN && GWIN_NEED_GRAPH */
/** @} */