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egi_fbgeom.c
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/*---------------------------------------------------------------------------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
Referring to: http://blog.chinaunix.net/uid-22666248-id-285417.html
本文的copyright归[email protected] 所有，使用GPL发布，可以自由拷贝，转载。
但转载请保持文档的完整性，注明原作者及原链接，严禁用于任何商业用途。
博客：yuweixian4230.blog.chinaunix.net
Note:
1. Not thread safe.
2. TODO: For all lines drawing functions: if distance between two input points
is too big, it may take too long time! The Caller should avoid such case.
3. TODO: For all curve drawing functions: Current step/segment is too big, the
resutl of draw_line()/draw_wline() segment is NOT so smooth.
Call draw_dot() and apply anti_aliasing to improve it.
---TODO: To draw curve width by filled triangles! ---
Jurnal
2021-1-10:
1. Modify fbget_pixColor(): to pick color from working buffer.
2021-1-21/25:
1. draw_dot(): Use var. pix_color instead of fb_color to store blended color value.
fb_color is FB sys color value!
2. draw_line(): extend pixel/alpha as for anti_aliasing.
2021-2-9:
1. Add draw_triangle().
2021-2-25:
1. draw_wrect(), draw_wrect_nc(), draw_wrect()
Draw one additional 1_width line inside the rect...
2021-2-28:
1. Apply fb_dev->zbuff in draw_dot().
2021-3-3:
1. Add fbget_zbuff().
2021-3-12:
1. Apply fb_dev->pixcolor for virtual FBDEV.
2021-3-30:
1. draw_line(antialias): Comment 'dev->pixcolor_on=true' at start and
'dev->pixcolor_on=false' at end, for there's NO color in the func params.
Just let caller to set/reset it.
2. draw_dot(): if(virt_fb){}: Use pix_color instead of fb_color to store blended color value.
fb_color is FB sys color value!
2021-04-1:
1.draw_filled_spline(): save FBDEV.pixcolor_on, and restore it later.
2021-04-2:
1. draw_blend_filled_roundcorner_rect() draw_blend_filled_rect()
draw_blend_filled_annulus() draw_blend_filled_circle():
Save FBDEV.pixcolor_on, and restore it later.
2. draw_filled_spline(): fbset_color() replaced by fbset_color2().
draw_circle2() draw_filled_annulus2() draw_filled_circle2():
fbset_color() replaced by fbset_color2() to use pixcolor.
2021-05-19:
1. Add draw_blend_filled_triangle().
2021-05-22/23:
1. Add point_intriangle().
2. Add pxy_online(), point_online().
2021-07-26:
1. Add draw_line_antialias().
2. draw_line(): Wrap with draw_line_simple() and draw_line_antialias().
2021-08-08:
1. draw_filled_triangle(): Use draw_line_simple().
2021-08-12:
1. Add draw3D_line(), draw3D_simple_line(), dist_points(), dist3D_points()
2. draw_dot(): apply fb_dev->flipZ.
2021-08-27:
1. Add draw_filled_triangle2(). float param: x,y
2021-08-30:
1. Add draw_filled_triangle3(). int param: x,y
2021-09-01/02:
1. Improve draw_filled_triangle3( int x/y ).
2021-09-07:
1. draw_filled_triangle3(): Case_3: if the triangle degenerates into a line!
2021-09-14:
1. Modify clear_screen().
2021-09-24:
1. draw_dot(): Check if pixalpha==0 at first.
2021-11-8:
1. Add draw_filled_triangle_outline()
2021-11-9:
1. Add draw_filled_triangle4(), pixZ value applys.
2. Add draw_filled_triangle4(), pixZ value applys.
2021-11-11:
1. draw_dot(): fb_dev->zbuff_IgnoreEqual applys.
2022-03-04:
1. Add float_draw_dot()
2022-03-05:
1. Rename float_draw_dot() as fdraw_dot()
2. Add fdraw_line()
2022-03-06:
1. Add fdraw_circle()
2022-03-07:
1. draw_line(): calls fdraw_line() if fbdev->antialias_on.
2022-03-09:
1. draw_filled_circle(): outer circle for antialiasing effect.
2022-03-11:
1. draw_wline(): Call draw_filled_triangles() to draw thickness.
2022-03-12:
1. draw_filled_triangle(): improve accuracy by checking result of floorf()/ceilf()
2022-03-14:
1. draw_blend_filled_roundcorner_rect(): antialiasing for arcs.
2. fdraw_dot(): consider user geom pixalpha --- NOT GOOD FOR ANTIALIAS BLENDING.
2022-03-24:
1. Improve draw_wline_nc(), draw_wline()
2. draw_spline(): Call draw_pline() instead of draw_wline()
2022-04-26:
1. To restore FBDEV.pixcolor if FBDEV.pixcolor_on is ture, affect following funcitons:
draw_line_antialias() draw_blend_filled_roundcorner_rect()
draw_blend_filled_rect() draw_blend_filled_triangle()
draw_blend_filled_annulus() draw_blend_filled_circle() draw_filled_spline()
2022-06-22:
1. Add pxy_inbox2().
2022-08-29:
1. draw3D_line_simple(): improve with roundf().
2022-08-30:
1. Add pixelate_filled_triangle2()
2022-09-01:
1. pixelate_filled_triangle2(float **pXYZ): Use float type for pXYZ, to keep precision of pixZ.
Modified and appended by Midas-Zhou
[email protected](Not in use since 2022_03_01)
----------------------------------------------------------------------------*/
#include "egi_fbgeom.h"
#include "egi.h"
#include "egi_debug.h"
#include "egi_math.h"
#include "egi_color.h"
#include <unistd.h>
#include <string.h> /*memset*/
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <math.h>
#include <stdlib.h>
/* global variale */
EGI_BOX gv_fb_box;
/* Default color set.
* Note:
* 1. fb_color and fb_rgb are volatile! They may be changed by draw_dot() and other functions!
*
*/
static uint16_t fb_color=(30<<11)|(10<<5)|10; //r(5)g(6)b(5) /* For 16bpp, */
#ifdef LETS_NOTE
static uint32_t fb_rgb=0x0000ff; /* For 24/32 bpp */
#endif
/* default usleep time after each draw_point() */
static unsigned int fb_drawdot_usleep;
/* Ancillary functions */
static inline int dist_points(int x1, int y1, int x2, int y2)
{
return roundf(sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)));
}
static inline int dist3D_points(int x1, int y1, int z1, int x2, int y2, int z2)
{
return roundf(sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)+(z2-z1)*(z2-z1)));
}
/* Set drawing speed: 1 - 10, 0==10 */
void fbset_speed(unsigned int speed)
{
/* Set Limit */
if(speed==0) speed=10;
if(speed>10) speed=10;
fb_drawdot_usleep=2*(10-speed)*(10-speed);
}
/* For DEBUG : print out sys.fb_color and FBDEV.pixcolor and FBDEV.pixalpha */
void fbprint_fbcolor(void)
{
printf(" -- fb_color=%#04X -- \n", fb_color);
}
void fbprint_fbpix(FBDEV *dev)
{
printf("pixcolor_on:%s, pixcolor=%#04X; pixalpha_hold:%s, pixalpha=%d\n",
dev->pixcolor_on?"true":"false", dev->pixcolor,
dev->pixalpha_hold?"true":"false", dev->pixalpha );
}
/* set color for every dot */
inline void fbset_color(EGI_16BIT_COLOR color)
{
fb_color=color;
}
/* set color for every dot */
inline void fbset_color2(FBDEV *dev, EGI_16BIT_COLOR color)
{
if(dev->pixcolor_on) /* Set private pixcolor */
dev->pixcolor=color;
else /* Set public pixcolor */
fb_color=color;
}
/* Set and reset alpha value for pixels, which will be applied in draw_dot() */
inline void fbset_alpha(FBDEV *dev, EGI_8BIT_ALPHA alpha)
{
if(dev==NULL)return;
/* turn on FBDEV pixalpha_hold and set pixalpha */
dev->pixalpha_hold=true;
dev->pixalpha=alpha;
}
inline void fbreset_alpha(FBDEV *dev)
{
if(dev==NULL)return;
/* turn off FBDEV pixalpha_hold and reset pixalpha to 255 */
dev->pixalpha_hold=false;
dev->pixalpha=255;
}
/*--------------------------------------------
check if (px,py) in box(x1,y1,x2,y2)
return:
True: within the box or on the edge
False
Midas Zhou
---------------------------------------------*/
inline bool pxy_inbox(int px,int py, int x1, int y1,int x2, int y2)
{
int xl,xh,yl,yh;
if(x1>=x2){
xh=x1;xl=x2;
}
else {
xl=x1;xh=x2;
}
if(y1>=y2){
yh=y1;yl=y2;
}
else {
yh=y2;yl=y1;
}
#if 0
if( (px>=xl && px<=xh) && (py>=yl && py<=yh))
return true;
else
return false;
#else /* HK2022-06-22 */
if(px<xl || px>xh || py<yl || py>yh)
return false;
else
return true;
#endif
}
/*--------------------------------------------
check if (px,py) in box.
return:
True: within the box or on the edge
False
Midas Zhou
---------------------------------------------*/
inline bool pxy_inbox2(int px,int py, const EGI_BOX* box)
{
if(box==NULL)
return false;
return pxy_inbox( px, py,
box->startxy.x, box->startxy.y,
box->endxy.x, box->endxy.y
);
}
/*--------------------------------------------
check if (px,py) in on line(x1,y1,x2,y2).
Return:
True
False
Midas Zhou
---------------------------------------------*/
inline bool pxy_online(int px,int py, int x1, int y1,int x2, int y2)
{
MAT_VECTOR2D vt[3];
float s;
float len;
int xl,xh,yl,yh;
len= sqrt( (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1) );
/* 1. If degenerated into a point */
if( len<1 ) {
//egi_dpstd("Too short a line, it's a point!\n");
len= sqrt( (px-x1)*(px-x1) + (py-y1)*(py-y1) );
return (len < 2.0);
}
/* 2. Check vector cross product, and distance=s/len */
vt[0]=(MAT_VECTOR2D){x1-px, y1-py}; /* x1-px */
vt[1]=(MAT_VECTOR2D){x2-px, y2-py}; /* x2-px */
s= VECTOR2D_CROSSPD(vt[0], vt[1]);
if( abs(s)/len > 1.0 )
return false;
/* 3. NOW: On the same line, but NOT necessary on the segment. */
/* 4. Check if on the segement */
if(x1>=x2){
xh=x1;xl=x2;
}
else {
xl=x1;xh=x2;
}
if(y1>=y2){
yh=y1;yl=y2;
}
else {
yh=y2;yl=y1;
}
return ( px>=xl && px<=xh) && (py>=yl && py<=yh); /* NOT '||', consider Vertical OR Horizontal line! */
}
/*--------------------------------------------
check if (px,py) in on segment defined by pts.
Return:
True
False
Midas Zhou
---------------------------------------------*/
inline bool point_online(const EGI_POINT *pxy, const EGI_POINT *pts)
{
if( pxy==NULL || pts==NULL)
return false;
return pxy_online( pxy->x, pxy->y,
pts->x, pts->y, (pts+1)->x, (pts+1)->y );
}
/*-----------------------------------------------
check if an EGI_POINT is in an EGI_BOX
return:
True: within the box or on the edge
False or Fails!
Midas Zhou
------------------------------------------------*/
inline bool point_inbox(const EGI_POINT *pxy, const EGI_BOX* box)
{
if(pxy==NULL || box==NULL)
return false;
return pxy_inbox( pxy->x, pxy->y,
box->startxy.x, box->startxy.y,
box->endxy.x, box->endxy.y
);
}
/*------------------------------------------------------------------------
check if an EGI_POINT is within a circle. If the point is just on the edge
of the circle, it deems as NOT within the circle.
@pxy: checking point.
@pc: Center point of the circle.
@r: Radius of the circle.
return:
True: the point is totally within the circle
False
Midas Zhou
-------------------------------------------------------------------------*/
inline bool point_incircle(const EGI_POINT *pxy, const EGI_POINT *pc, int r)
{
if(pxy==NULL || pc==NULL)
return false;
if( r*r > (pxy->x - pc->x)*(pxy->x - pc->x)+(pxy->y - pc->y)*(pxy->y - pc->y) )
return true;
else
return false;
}
/*------------------------------------------------------------------------
Check if an EGI_POINT is within a triangle.
(Barycentric Coordinate Method)
Reference: https://blackpawn.com/texts/pointinpoly/default.html
@pxy: checking point.
@tripts: Three points to define a triangle.
return:
True: the point is within the triangle.
False
Midas Zhou
-------------------------------------------------------------------------*/
inline bool point_intriangle(const EGI_POINT *pxy, const EGI_POINT *tripts)
{
MAT_VECTOR2D vt[4];
// float s;
float dp00, dp01, dp02, dp11, dp12;
float denom;
float u,v;
// float len;
if(pxy==NULL || tripts==NULL)
return false;
vt[0] = VECTOR2D_SUB(tripts[2], tripts[0]);
vt[1] = VECTOR2D_SUB(tripts[1], tripts[0]);
vt[2] = VECTOR2D_SUB(pxy[0], tripts[0]); /* <---- pxy -> ptn[0] ------- */
vt[3]= VECTOR2D_SUB(tripts[2], tripts[1]);
dp00=VECTOR2D_DOTPD(vt[0], vt[0]);
dp01=VECTOR2D_DOTPD(vt[0], vt[1]);
dp02=VECTOR2D_DOTPD(vt[0], vt[2]);
dp11=VECTOR2D_DOTPD(vt[1], vt[1]);
dp12=VECTOR2D_DOTPD(vt[1], vt[2]);
denom=dp00*dp11 - dp01*dp01;
/* If degenrated into a line. */
if( abs(denom) < 1 ) {
//egi_dpstd("denom<1, It's a line! \n");
/* Case: vt[3]~=0! */
if(VECTOR2D_MOD( vt[3])<1 )
return point_online(pxy, tripts); /* Line: tripts[0], tripts[1] */
/* Case: vt[0]~=0! || vt[1]~=0! */
else
return point_online(pxy, tripts+1); /* Line: tripts[1], tripts[2] */
}
u=(dp11*dp02 - dp01*dp12)/denom;
v=(dp00*dp12 - dp01*dp02)/denom;
return (u>=0) && (v>=0) && ( u+v <= 1 );
}
/*---------------------------------------------------------------
Check whether the box is totally WITHIN the container.
If there is an overlap of any sides, it is deemed as NOT within!
@inbox: checking box
@container: containing box
Return:
True: the box is totally WITHIN the container.
False: NOT totally WITHIN the container.
or fails!
Midas Zhou
----------------------------------------------------------------*/
bool box_inbox(EGI_BOX* inbox, EGI_BOX* container)
{
int xcu,xcd; /*u-max, d-min*/
int xiu,xid;
int ycu,ycd;
int yiu,yid;
if( inbox==NULL || container==NULL )
return false;
/* 1. get Max. and Min X coord of the container */
if( container->startxy.x > container->endxy.x ) {
xcu=container->startxy.x;
xcd=container->endxy.x;
}
else {
xcu=container->endxy.x;
xcd=container->startxy.x;
}
/* 2. get Max. and Min X coord of the inbox */
if( inbox->startxy.x > inbox->endxy.x ) {
xiu=inbox->startxy.x;
xid=inbox->endxy.x;
}
else {
xiu=inbox->endxy.x;
xid=inbox->startxy.x;
}
/* 3. compare X coord */
if( !(xcd<xid) || !(xcu>xiu) )
return false;
/* 4. get Max. and Min Y coord of the container */
if( container->startxy.y > container->endxy.y ) {
ycu=container->startxy.y;
ycd=container->endxy.y;
}
else {
ycu=container->endxy.y;
ycd=container->startxy.y;
}
/* 5. get Max. and Min Y coord of the inbox */
if( inbox->startxy.y > inbox->endxy.y ) {
yiu=inbox->startxy.y;
yid=inbox->endxy.y;
}
else {
yiu=inbox->endxy.y;
yid=inbox->startxy.y;
}
/* 6. compare Y coord */
if( !(ycd<yid) || !(ycu>yiu) )
return false;
return true;
}
/*--------------------------------------------------------------------
Check whether the box is totally out of the container.
If there is an overlap of any sides, it is deemed as NOT totally out!
@inbox: checking box
@container: containing box
Return:
True: the box is totally out of the container.
False: NOT totally out of the container.
or fails!
Midas Zhou
--------------------------------------------------------------------*/
bool box_outbox(EGI_BOX* inbox, EGI_BOX* container)
{
int xcu,xcd; /*u-max, d-min*/
int xiu,xid;
int ycu,ycd;
int yiu,yid;
if( inbox==NULL || container==NULL )
return false;
/* 1. get Max. and Min X coord of the container */
if( container->startxy.x > container->endxy.x ) {
xcu=container->startxy.x;
xcd=container->endxy.x;
}
else {
xcu=container->endxy.x;
xcd=container->startxy.x;
}
/* 2. get Max. and Min X coord of the inbox */
if( inbox->startxy.x > inbox->endxy.x ) {
xiu=inbox->startxy.x;
xid=inbox->endxy.x;
}
else {
xiu=inbox->endxy.x;
xid=inbox->startxy.x;
}
/* 3. compare X coord */
if( !( xcd>xiu || xcu<xid ) )
return false;
/* 4. get Max. and Min Y coord of the container */
if( container->startxy.y > container->endxy.y ) {
ycu=container->startxy.y;
ycd=container->endxy.y;
}
else {
ycu=container->endxy.y;
ycd=container->startxy.y;
}
/* 5. get Max. and Min Y coord of the inbox */
if( inbox->startxy.y > inbox->endxy.y ) {
yiu=inbox->startxy.y;
yid=inbox->endxy.y;
}
else {
yiu=inbox->endxy.y;
yid=inbox->startxy.y;
}
/* 6. compare Y coord */
if( !( ycd>yiu || ycu<yid ) )
return false;
return true;
}
/*---------------------------------------------
clear screen with given color
BUG:
!!!!call egi_colorxxxx_randmon() error
Midas
---------------------------------------------*/
void clear_screen(FBDEV *fb_dev, uint16_t color)
{
int bytes_per_pixel=fb_dev->vinfo.bits_per_pixel/8;
long int location=0;
/* If map_bk allocated, ENABLE_BACK_BUFFER is defined */
if( fb_dev->map_bk ) {
for(location=0; location < (fb_dev->screensize/bytes_per_pixel); location++)
*((uint16_t*)(fb_dev->map_bk+location*bytes_per_pixel))=color;
}
/* Only map_fb is available */
else {
for(location=0; location < (fb_dev->screensize/bytes_per_pixel); location++)
*((uint16_t*)(fb_dev->map_fb+location*bytes_per_pixel))=color;
}
}
/*----------- Oboselete!!! Replaced by fb_clear_backBuff() -----------
clear fb_dev->map_bk with given color
Midas
--------------------------------------------------------------------*/
void fbclear_bkBuff(FBDEV *fb_dev, uint16_t color)
{
int bytes_per_pixel=fb_dev->vinfo.bits_per_pixel/8;
long int location=0;
for(location=0; location < (fb_dev->screensize/bytes_per_pixel); location++)
*((uint16_t*)(fb_dev->map_bk+location*bytes_per_pixel))=color;
}
/*-------------------------------------------------------------------
Return indicated pixel color value in EGI_16BIT_COLOR.
--- FOR 16BIT COLOR FB ---
Note:
1. If fb_dev->lumadelt is NOT zero, then picked color is NOT same
as original written color.
@fb_dev: FB under consideration
@x,y: Pixel coordinate value. under FB.pos_rotate coord!
Return:
Ok 16bit color value for the pixel with given coordinates(x,y).
Fail 0 as for black
Midas Zhou
-------------------------------------------------------------------*/
EGI_16BIT_COLOR fbget_pixColor(FBDEV *fb_dev, int x, int y)
{
if(fb_dev==NULL || fb_dev->map_fb==NULL)
return 0;
int fx=0, fy=0; /* FB mem space coordinate */
int xres=fb_dev->vinfo.xres;
int yres=fb_dev->vinfo.yres;
/* check FB.pos_rotate: Map x,y to fx,fy under default FB coord.
* Note: Here xres/yres is default/HW_set FB x/y resolustion!
*/
switch(fb_dev->pos_rotate) {
case 0: /* FB default position */
fx=x;
fy=y;
break;
case 1: /* Clockwise 90 deg */
fx=(xres-1)-y;
fy=x;
break;
case 2: /* Clockwise 180 deg */
fx=(xres-1)-x;
fy=(yres-1)-y;
break;
case 3: /* Clockwise 270 deg */
fx=y;
fy=(yres-1)-x;
break;
}
/* Check mapped FX FY in default FB */
if( fx < 0 || fx > xres-1 ) return 0;
if( fy < 0 || fy > yres-1 ) return 0;
/* Pick pix color from working buffer */
if(fb_dev->map_bk)
return *(EGI_16BIT_COLOR *)(fb_dev->map_bk+(fy*xres+fx)*sizeof(EGI_16BIT_COLOR));
/* Pick from FB mmap */
else
return *(EGI_16BIT_COLOR *)(fb_dev->map_fb+(fy*xres+fx)*sizeof(EGI_16BIT_COLOR));
}
/*-------------------------------------------------------------------
Return zbuff value for the given point (x,y) in FBDEV.
@fb_dev: FBDEV.
@x,y: Pixel coordinate value. under FB.pos_rotate coord!
Return:
0 Fails or out of range. ( 0 as for bkground layer.)
>=0 Ok.
Midas Zhou
-------------------------------------------------------------------*/
int fbget_zbuff(FBDEV *fb_dev, int x, int y)
{
if(fb_dev==NULL || fb_dev->map_fb==NULL)
return 0;
int fx=0, fy=0; /* FB mem space coordinate */
int xres=fb_dev->vinfo.xres;
int yres=fb_dev->vinfo.yres;
long int pixoff;
/* check FB.pos_rotate: Map x,y to fx,fy under default FB coord.
* Note: Here xres/yres is default/HW_set FB x/y resolustion!
*/
switch(fb_dev->pos_rotate) {
case 0: /* FB default position */
fx=x;
fy=y;
break;
case 1: /* Clockwise 90 deg */
fx=(xres-1)-y;
fy=x;
break;
case 2: /* Clockwise 180 deg */
fx=(xres-1)-x;
fy=(yres-1)-y;
break;
case 3: /* Clockwise 270 deg */
fx=y;
fy=(yres-1)-x;
break;
}
/* Check mapped FX FY in default FB */
if( fx < 0 || fx > xres-1 ) return 0;
if( fy < 0 || fy > yres-1 ) return 0;
/* Get zbuff */
pixoff=fy*xres+fx;
return fb_dev->zbuff[pixoff];
}
/*------------------------------------------------------------------
Assign color value to a pixel in framebuffer.
Note:
1. The pixel color value will be system color fb_color, or as its
private color of FBDEV.pixcolor.
2. The caller shall do boudary check first, to ensure that coordinates
(x,y) is within screen size range. or just rule it out.
TEST:
1. test luma adjustment FOR_16BITS_COLOR_FBDEV only.
Midas Zhou
Return:
0 OK
<0 Fails
-1 get out of FB mem.(ifndef FB_DOTOUT_ROLLBACK)
-------------------------------------------------------------------*/
int draw_dot(FBDEV *fb_dev,int x,int y)
{
EGI_IMGBUF *virt_fb;
unsigned char *map;
int fx=0;
int fy=0;
long int location=0;
long int pixoff;
#ifdef LETS_NOTE
unsigned char* pARGB=NULL; /* For LETS_NOTE */
#endif
int xres;
int yres;
FBPIX fpix;
int sumalpha;
EGI_16BIT_COLOR pix_color;
/* Check input data */
if(fb_dev==NULL)
return -2;
/* Check pixalpha if 0 */
if(fb_dev->pixalpha == 0) {
/* Do NOT change fb_dev->zbuff[pixoff] */
/* Reset alpha to 255 as default */
if(fb_dev->pixalpha_hold==false)
fb_dev->pixalpha=255;
return 0;
}
/* <<<<<< FB BUFFER SELECT >>>>>> */
#if defined(ENABLE_BACK_BUFFER) || defined(LETS_NOTE)
map=fb_dev->map_bk; /* write to back buffer */
#else
map=fb_dev->map_fb; /* write directly to FB map */;
#endif
/* set xres and yres */
virt_fb=fb_dev->virt_fb;
if(virt_fb) { /* for virtual FB */
xres=virt_fb->width;
yres=virt_fb->height;
}
else { /* for FB */
xres=fb_dev->vinfo.xres;
yres=fb_dev->vinfo.yres;
}
/* Check FB.pos_xres, pos_yres */
//if(fb_dev->pos_rotate) {
if( x<0 || x>fb_dev->pos_xres-1)
return -1;
if( y<0 || y>fb_dev->pos_yres-1)
return -1;
//}
/* Check FB.pos_rotate
* IF 90 Deg rotated: Y maps to (xres-1)-FB.X, X maps to FB.Y
* Note: Here xres/yres is default/HW_set FB x/y resolustion!
*/
switch(fb_dev->pos_rotate) {
case 0: /* FB default position */
fx=x;
fy=y;
break;
case 1: /* Clockwise 90 deg */
fx=(xres-1)-y;
fy=x;
break;
case 2: /* Clockwise 180 deg */
fx=(xres-1)-x;
fy=(yres-1)-y;
break;
case 3: /* Clockwise 270 deg */
fx=y;
fy=(yres-1)-x;
break;
}
#ifdef FB_DOTOUT_ROLLBACK
/* map to LCD(X,Y) or IMGBUF if virt_fb */
if(fx>xres-1)
fx=fx%xres;
else if(fx<0)
{
fx=xres-(-fx)%xres;
fx=fx%xres; /* here fx=1-240 */
}
if( fy > yres-1) {
fy=fy%yres;
}
else if(fy<0) {
fy=yres-(-fy)%yres;
fy=fy%yres; /* here fy=1-320 */
}
#else /* NO ROLLBACK */
/* ignore out_ranged points */
if( fx>(xres-1) || fx<0) {
return -1;
}
if( fy>(yres-1) || fy<0 ) {
return -1;
}
#endif
/* Check Z if zbuff_on */
if( fb_dev->zbuff_on ) {
pixoff=fy*xres+fx;
/* flipZ==ture */
if( fb_dev->flipZ ) {
//fb_dev->pixz = -fb_dev->pixz;
/* Zbuff > -pixZ */
if( fb_dev->zbuff[pixoff] > -fb_dev->pixz )
return 0;
/* Zbuff == -pixZ */
else if( fb_dev->zbuff[pixoff] == -fb_dev->pixz && fb_dev->zbuff_IgnoreEqual )
return 0;
/* Zbuff <(=) -pixZ */
else
fb_dev->zbuff[pixoff]= -fb_dev->pixz;
}
/* flipZ==false */
else {
/* Zbuff > pixZ */
if( fb_dev->zbuff[pixoff] > fb_dev->pixz )
return 0;
/* Zbuff==pixZ */
else if( fb_dev->zbuff[pixoff] == fb_dev->pixz && fb_dev->zbuff_IgnoreEqual )
return 0;
/* Zbuff <(=) pixZ */
else
fb_dev->zbuff[pixoff]=fb_dev->pixz;
}
}
/* ---------------- ( for virtual FB :: for 16bit color only NOW!!! ) -------------- */
if(virt_fb) {
/* (in pixles): data location of the point pixel */
location=fx+fy*virt_fb->width;
/* check if no space left for a 16bit pixel */
if( location < 0 || location > fb_dev->screensize - 1 ) /* screensize of imgbuf,
* in pixels! */
{
printf("WARNING: point location out of EGI_IMGBUF mem.!\n");
return -1;
}
/* blend pixel color
* TODO: Also apply background alpha value if virt_fb->alpha available ????
* fb_color=egi_16bitColor_blend2( fb_color, fb_dev->pixalpha,
* virt_fb->imgbuf[location], virt_fb->alpha[location]);
*/
if(fb_dev->pixalpha==255) { /* if 100% front color */
if(fb_dev->pixcolor_on)
virt_fb->imgbuf[location]=fb_dev->pixcolor;
else
virt_fb->imgbuf[location]=fb_color;
}
/* otherwise, blend with original color, back alpha value ignored!!! */
else if( fb_dev->pixalpha!=0 ) {
if(fb_dev->pixcolor_on) {
/* NOTE: back color alpha value all deemed as 255, */
// XXX fb_color=COLOR_16BITS_BLEND( fb_dev->pixcolor, /* Front color */
pix_color=COLOR_16BITS_BLEND( fb_dev->pixcolor, /* Front color */
virt_fb->imgbuf[location], /* Back color */
fb_dev->pixalpha ); /* Alpha value */
virt_fb->imgbuf[location]=pix_color;
}
else {
/* NOTE: back color alpha value all deemed as 255, */
pix_color=COLOR_16BITS_BLEND( fb_color, /* Front color */
virt_fb->imgbuf[location], /* Back color */
fb_dev->pixalpha ); /* Alpha value */
virt_fb->imgbuf[location]=pix_color;
}
}
/* if VIRT FB has alpha data. TODO: Apply egi_16bitColor_blend2() */
if(virt_fb->alpha) {
/* sum up alpha value */
sumalpha=virt_fb->alpha[location]+fb_dev->pixalpha;
if( sumalpha > 255 ) sumalpha=255;
virt_fb->alpha[location]=sumalpha;
}
/* reset alpha to 255 as default, at last!!! */
if(fb_dev->pixalpha_hold==false)
fb_dev->pixalpha=255;
}
/* ------------------------ ( for real FB ) ---------------------- */
else {
#ifdef LETS_NOTE /* --------- FOR 32BITS COLOR (ARGB) FBDEV ------------ */
/*(in bytes:) data location of the point pixel */
location=(fx+fb_dev->vinfo.xoffset)*(fb_dev->vinfo.bits_per_pixel>>3)+
(fy+fb_dev->vinfo.yoffset)*fb_dev->finfo.line_length;
/* NOT necessary ??? check if no space left for a 16bit_pixel in FB mem */
if( location<0 || location > (fb_dev->screensize-sizeof(uint32_t)) ) /* screensize in bytes! */
{
//printf("WARNING: point location out of fb mem.!\n");
return -1;
}
/* push old data to FB FILO */
if(fb_dev->filo_on && fb_dev->pixalpha>0 )
{
fpix.position=location; /* pixel to bytes, !!! FAINT !!! */
pARGB=map+location;
fpix.argb=*(uint32_t *)pARGB;
/* FB alpha value no more use ? */