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New dual circle drawing in GDISP

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This commit is contained in:
inmarket 2016-11-09 16:41:44 +10:00
parent 59917dbe1a
commit 545a719db9
5 changed files with 105 additions and 0 deletions
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1
docs/releases.txt
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@ -17,6 +17,7 @@ FIX: Fixing and improving arc rendering functions
FIX: Preventing possible crash when no valid GWIN default font has been set
FIX: Updating Windows binaries of the font encoder to improve compatibility
FIX: Fix Progressbar bounds checking and decrementing
FEATURE: Added a dual circle with the same center drawing routine to GDISP
*** Release 2.6 ***

1
gfxconf.example.h
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@ -68,6 +68,7 @@
//#define GDISP_NEED_VALIDATION TRUE
//#define GDISP_NEED_CLIP TRUE
//#define GDISP_NEED_CIRCLE FALSE
//#define GDISP_NEED_DUALCIRCLE FALSE
//#define GDISP_NEED_ELLIPSE FALSE
//#define GDISP_NEED_ARC FALSE
//#define GDISP_NEED_ARCSECTORS FALSE

77
src/gdisp/gdisp.c
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@ -1347,6 +1347,83 @@ void gdispGBlitArea(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, c
}
#endif
#if GDISP_NEED_DUALCIRCLE
#define DRAW_DUALLINE(yval, r1, r2) \
g->p.y = yval; \
g->p.x = x-r1; g->p.x1 = x-r2+1; hline_clip(g); \
g->p.x = x-r2; g->p.x1 = x+r2; g->p.color = color2; hline_clip(g); \
g->p.x = x+r2+1; g->p.x1 = x+r1; g->p.color = color1; hline_clip(g)
#define DRAW_SINGLELINE(yval, r) g->p.y = yval; g->p.x = x-r; g->p.x1 = x+r; hline_clip(g)
void gdispGFillDualCircle(GDisplay *g, coord_t x, coord_t y, coord_t radius1, color_t color1, coord_t radius2, color_t color2) {
coord_t a, b1, b2, p1, p2;
MUTEX_ENTER(g);
// Do the combined circle where the inner circle < 45 deg (and outer circle)
g->p.color = color1;
a = 0; b1 = radius1; b2 = radius2; p1 = p2 = 1;
do {
DRAW_DUALLINE(y+a, b1, b2);
DRAW_DUALLINE(y-a, b1, b2);
if (p1 >= 0) p1 -= b1--;
p1 += a;
if (p2 >= 0) p2 -= b2--;
p2 += a;
} while(++a < b2);
// Do the combined circle where inner circle > 45 deg, outer circle < 45
do {
DRAW_DUALLINE(y+a, b1, b2);
DRAW_DUALLINE(y-a, b1, b2);
if (p1 >= 0) p1 -= b1--;
p1 += a;
do { p2 -= --b2; } while (p2+a >= b2);
p2 += a;
} while(++a <= radius2 && a < b1);
if (a < radius2) {
// Do the combined circle where inner circle > 45 deg, outer circle > 45
do {
DRAW_DUALLINE(y+a, b1, b2);
DRAW_DUALLINE(y-a, b1, b2);
do { p1 -= --b1; } while (p1+a >= b1);
p1 += a;
do { p2 -= --b2; } while (p2+a >= b2);
p2 += a++;
} while(b2 > 0);
} else {
// Do the outer circle above the inner circle but < 45 deg
do {
DRAW_SINGLELINE(y+a, b1);
DRAW_SINGLELINE(y-a, b1);
if (p1 >= 0) p1 -= b1--;
p1 += a++;
} while(a < b1);
DRAW_SINGLELINE(y+a, b1);
DRAW_SINGLELINE(y-a, b1);
}
// Do the top and bottom part of the outer circle (outer circle > 45deg and above inner circle)
a = 0; b1 = radius1; p1 = 1;
do {
if (p1 >= 0) {
DRAW_SINGLELINE(y+b1, a);
DRAW_SINGLELINE(y-b1, a);
p1 -= b1--;
}
p1 += a++;
} while(b1 > radius2 && a < b1);
autoflush(g);
MUTEX_EXIT(g);
}
#undef DRAW_DUALLINE
#undef DRAW_SINGLELINE
#endif
#if GDISP_NEED_ELLIPSE
void gdispGDrawEllipse(GDisplay *g, coord_t x, coord_t y, coord_t a, coord_t b, color_t color) {
coord_t dx, dy;

18
src/gdisp/gdisp.h
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@ -574,6 +574,24 @@ void gdispGDrawBox(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, co
#define gdispFillCircle(x,y,r,c) gdispGFillCircle(GDISP,x,y,r,c)
#endif
#if GDISP_NEED_DUALCIRCLE || defined(__DOXYGEN__)
/**
* @brief Draw two filled circles with the same centre.
* @pre GDISP_NEED_DUALCIRCLE must be TRUE in your gfxconf.h
*
* @param[in] g The display to use
* @param[in] x,y The center of the circle
* @param[in] radius1 The radius of the larger circle
* @param[in] color1 The color to use for the larger circle
* @param[in] radius2 The radius of the smaller circle
* @param[in] color2 The color to use for the smaller circle
*
* @api
*/
void gdispGFillDualCircle(GDisplay *g, coord_t x, coord_t y, coord_t radius1, color_t color1, coord_t radius2, color_t color2);
#define gdispFillDualCircle(x,y,r,c) gdispGFillDualCircle(GDISP,x,y,r1,c1,r2,c2)
#endif
/* Ellipse Functions */
#if GDISP_NEED_ELLIPSE || defined(__DOXYGEN__)

8
src/gdisp/gdisp_options.h
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@ -93,6 +93,14 @@
#ifndef GDISP_NEED_CIRCLE
#define GDISP_NEED_CIRCLE FALSE
#endif
/**
* @brief Are dual circle functions needed (one circle inside another).
* @details Defaults to FALSE
* @note Uses integer algorithms only. It does not use any trig or floating point.
*/
#ifndef GDISP_NEED_DUALCIRCLE
#define GDISP_NEED_DUALCIRCLE FALSE
#endif
/**
* @brief Are ellipse functions needed.
* @details Defaults to FALSE