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Draw.c
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Draw.c
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/***********************************************************************************************************************
PicoMite MMBasic
Draw.c
<COPYRIGHT HOLDERS> Geoff Graham, Peter Mather
Copyright (c) 2021, <COPYRIGHT HOLDERS> All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the distribution.
3. The name MMBasic be used when referring to the interpreter in any documentation and promotional material and the original copyright message be displayed
on the console at startup (additional copyright messages may be added).
4. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed
by the <copyright holder>.
5. Neither the name of the <copyright holder> nor the names of its contributors may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDERS> AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDERS> BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
************************************************************************************************************************/
#include "MMBasic_Includes.h"
#include "Hardware_Includes.h"
#include "hardware/spi.h"
#ifndef PICOMITEWEB
#include "pico/multicore.h"
extern mutex_t frameBufferMutex;
#endif
#ifdef PICOMITEWEB
#include "pico/cyw43_arch.h"
#endif
#define LONG long
#define max(x, y) (((x) > (y)) ? (x) : (y))
#define min(x, y) (((x) < (y)) ? (x) : (y))
#define RoundUptoInt(a) (((a) + (32 - 1)) & (~(32 - 1)))// round up to the nearest whole integer
void DrawFilledCircle(int x, int y, int radius, int r, int fill, int ints_per_line, uint32_t *br, MMFLOAT aspect, MMFLOAT aspect2);
void hline(int x0, int x1, int y, int f, int ints_per_line, uint32_t *br);
void SaveTriangle(int bnbr, char *buff);
void RestoreTriangle(int bnbr, char *buff);
void ReadLine(int x1,int y1,int x2,int y2, char *buff);
void cmd_RestoreTriangle(unsigned char *p);
void polygon(unsigned char *p, int close);
typedef struct _BMPDECODER
{
LONG lWidth;
LONG lHeight;
LONG lImageOffset;
WORD wPaletteEntries;
BYTE bBitsPerPixel;
BYTE bHeaderType;
BYTE blBmMarkerFlag : 1;
BYTE blCompressionType : 3;
BYTE bNumOfPlanes : 3;
BYTE b16bit565flag : 1;
BYTE aPalette[256][3]; /* Each palette entry has RGB */
} BMPDECODER;
/***************************************************************************/
// define the fonts
#include "font1.h"
#include "Misc_12x20_LE.h"
#include "Hom_16x24_LE.h"
#include "Fnt_10x16.h"
#include "Inconsola.h"
#include "ArialNumFontPlus.h"
#include "Font_8x6.h"
#include "arial_bold.h"
#ifdef PICOMITEVGA
#ifndef HDMI
#include "Include.h"
#endif
#endif
#include "smallfont.h"
unsigned char *FontTable[FONT_TABLE_SIZE] = { (unsigned char *)font1,
(unsigned char *)Misc_12x20_LE,
#ifdef PICOMITEVGA
#ifdef HDMI
(unsigned char *)Hom_16x24_LE,
#else
(unsigned char *)arial_bold,
#endif
#else
(unsigned char *)Hom_16x24_LE,
#endif
(unsigned char *)Fnt_10x16,
(unsigned char *)Inconsola,
(unsigned char *)ArialNumFontPlus,
(unsigned char *)F_6x8_LE,
(unsigned char *)TinyFont,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
/***************************************************************************/
// the default function for DrawRectangle() and DrawBitmap()
short gui_font;
int gui_fcolour;
int gui_bcolour;
short low_y=LCDMaxV, high_y=0, low_x=LCDMaxH, high_x=0;
int PrintPixelMode=0;
short CurrentX=0, CurrentY=0; // the current default position for the next char to be written
short DisplayHRes, DisplayVRes; // the physical characteristics of the display
struct spritebuffer spritebuff[MAXBLITBUF+1] = { 0 };
struct blitbuffer blitbuff[MAXBLITBUF+1] = { 0 };
char CMM1=0;
// the MMBasic programming characteristics of the display
// note that HRes == 0 is an indication that a display is not configured
short HRes = 0, VRes = 0;
short lastx,lasty;
const int CMM1map[16]={BLACK,BLUE,GREEN,CYAN,RED,MAGENTA,YELLOW,WHITE,MYRTLE,COBALT,MIDGREEN,CERULEAN,RUST,FUCHSIA,BROWN,LILAC};
int RGB121map[16];
uint32_t remap[256];
// pointers to the drawing primitives
#ifndef PICOMITEWEB
struct D3D* struct3d[MAX3D + 1] = { NULL };
s_camera camera[MAXCAM + 1];
#endif
int layer_in_use[MAXLAYER + 1];
unsigned char LIFO[MAXBLITBUF];
unsigned char zeroLIFO[MAXBLITBUF];
uint8_t LIFOpointer = 0;
uint8_t zeroLIFOpointer = 0;
uint8_t sprites_in_use = 0;
char* COLLISIONInterrupt = NULL;
bool CollisionFound = false;
int sprite_which_collided = -1;
static bool hideall = 0;
uint8_t sprite_transparent=0;
#ifdef PICOMITEVGA
short gui_font_width, gui_font_height;
int last_bcolour, last_fcolour;
volatile int CursorTimer=0; // used to time the flashing cursor
extern volatile int QVgaScanLine;
extern uint16_t map16[16];
bool mergedread=0;
int ScreenSize=0;
#else
int map[16]={0};
#ifdef PICOMITEWEB
short gui_font_width, gui_font_height;
int last_bcolour, last_fcolour;
volatile int CursorTimer=0; // used to time the flashing cursor
int display_backlight; // the brightness of the backlight (1 to 100)
#else
extern int InvokingCtrl;
bool mergerunning=false;
volatile bool mergedone=false;
uint32_t mergetimer=0;
#endif
#endif
void cmd_ReadTriangle(unsigned char *p);
void (*DrawRectangle)(int x1, int y1, int x2, int y2, int c) = (void (*)(int , int , int , int , int ))DisplayNotSet;
void (*DrawBitmap)(int x1, int y1, int width, int height, int scale, int fc, int bc, unsigned char *bitmap) = (void (*)(int , int , int , int , int , int , int , unsigned char *))DisplayNotSet;
void (*ScrollLCD) (int lines) = (void (*)(int ))DisplayNotSet;
void (*DrawBuffer)(int x1, int y1, int x2, int y2, unsigned char *c) = (void (*)(int , int , int , int , unsigned char * ))DisplayNotSet;
void (*ReadBuffer)(int x1, int y1, int x2, int y2, unsigned char *c) = (void (*)(int , int , int , int , unsigned char * ))DisplayNotSet;
void (*DrawBLITBuffer)(int x1, int y1, int x2, int y2, unsigned char *c) = (void (*)(int , int , int , int , unsigned char * ))DisplayNotSet;
void (*ReadBLITBuffer)(int x1, int y1, int x2, int y2, unsigned char *c) = (void (*)(int , int , int , int , unsigned char * ))DisplayNotSet;
void (*DrawBufferFast)(int x1, int y1, int x2, int y2, int blank, unsigned char *c) = (void (*)(int , int , int , int , int, unsigned char * ))DisplayNotSet;
void (*ReadBufferFast)(int x1, int y1, int x2, int y2, unsigned char *c) = (void (*)(int , int , int , int , unsigned char * ))DisplayNotSet;
void (*DrawPixel)(int x1, int y1, int c) = (void (*)(int , int , int ))DisplayNotSet;
void DrawTriangle(int x0, int y0, int x1, int y1, int x2, int y2, int c, int fill);
// these are the GUI commands that are common to the MX170 and MX470 versions
// in the case of the MX170 this function is called directly by MMBasic when the GUI command is used
// in the case of the MX470 it is called by MX470GUI in GUI.c
const int colours[16]={0x00,0xFF,0x4000,0x40ff,0x8000,0x80ff,0xff00,0xffff,0xff0000,0xff00FF,0xff4000,0xff40ff,0xff8000,0xff80ff,0xffff00,0xffffff};
void MIPS16 initFonts(void){
FontTable[0] = (unsigned char *)font1;
FontTable[1] = (unsigned char *)Misc_12x20_LE;
FontTable[2] = (unsigned char *)Hom_16x24_LE;
FontTable[3] = (unsigned char *)Fnt_10x16;
FontTable[4] = (unsigned char *)Inconsola;
FontTable[5] = (unsigned char *)ArialNumFontPlus;
FontTable[6] = (unsigned char *)F_6x8_LE;
FontTable[7] = (unsigned char *)TinyFont;
FontTable[8] = NULL;
FontTable[9] = NULL;
FontTable[10] = NULL;
FontTable[11] = NULL;
FontTable[12] = NULL;
FontTable[13] = NULL;
FontTable[14] = NULL;
FontTable[15] = NULL;
}
uint16_t RGB555(uint32_t c){
return ((c & 0xf8)>>3) | ((c& 0xf800)>>6) | ((c & 0xf80000)>>9);
}
uint8_t RGB332(uint32_t c){
return ((c & 0b111000000000000000000000)>>16) | ((c & 0b1110000000000000)>>11) | ((c & 0b11000000)>>6);
}
uint8_t RGB121(uint32_t c){
return ((c & 0x800000)>> 20) | ((c & 0xC000)>>13) | ((c & 0x80)>>7);
}
void MIPS16 cmd_guiMX170(void) {
unsigned char *p;
if(Option.DISPLAY_TYPE == 0) error("Display not configured");
// display a bitmap stored in an integer or string
if((p = checkstring(cmdline, (unsigned char *)"BITMAP"))) {
int x, y, fc, bc, h, w, scale, t, bytes;
unsigned char *s;
MMFLOAT f;
long long int i64;
getargs(&p, 15, (unsigned char *)",");
if(!(argc & 1) || argc < 5) error("Argument count");
// set the defaults
h = 8; w = 8; scale = 1; bytes = 8; fc = gui_fcolour; bc = gui_bcolour;
x = getinteger(argv[0]);
y = getinteger(argv[2]);
// get the type of argument 3 (the bitmap) and its value (integer or string)
t = T_NOTYPE;
evaluate(argv[4], &f, &i64, &s, &t, true);
if(t & T_NBR)
error("Invalid argument");
else if(t & T_INT)
s = (unsigned char *)&i64;
else if(t & T_STR)
bytes = *s++;
if(argc > 5 && *argv[6]) w = getint(argv[6], 1, HRes);
if(argc > 7 && *argv[8]) h = getint(argv[8], 1, VRes);
if(argc > 9 && *argv[10]) scale = getint(argv[10], 1, 15);
if(argc > 11 && *argv[12]) fc = getint(argv[12], 0, WHITE);
if(argc == 15) bc = getint(argv[14], -1, WHITE);
if(h * w > bytes * 8) error("Not enough data");
DrawBitmap(x, y, w, h, scale, fc, bc, (unsigned char *)s);
if(Option.Refresh)Display_Refresh();
return;
}
#ifndef PICOMITEVGA
#ifndef PICOMITEWEB
if((p = checkstring(cmdline, (unsigned char *)"BEEP"))) {
if(Option.TOUCH_Click == 0) error("Click option not set");
ClickTimer = getint(p, 0, INT_MAX) + 1;
return;
}
#endif
if((p = checkstring(cmdline, (unsigned char *)"RESET"))) {
if((checkstring(p, (unsigned char *)"LCDPANEL"))) {
#ifdef PICOMITE
if(mergerunning){
multicore_fifo_push_blocking(0xFF);
busy_wait_ms(mergetimer+200);
if(mergerunning){
_excep_code = RESET_COMMAND;
SoftReset();
}
}
#endif
InitDisplaySPI(true);
InitDisplayI2C(true);
if(Option.TOUCH_CS) {
GetTouchValue(CMD_PENIRQ_ON); // send the controller the command to turn on PenIRQ
GetTouchAxis(CMD_MEASURE_X);
}
return;
}
}
if((p = checkstring(cmdline, (unsigned char *)"CALIBRATE"))) {
int tlx, tly, trx, try, blx, bly, brx, bry, midy;
char *s;
if(Option.TOUCH_CS == 0) error("Touch not configured");
if(*p && *p != '\'') { // if the calibration is provided on the command line
getargs(&p, 9, (unsigned char *)",");
if(argc != 9) error("Argument count");
Option.TOUCH_SWAPXY = getinteger(argv[0]);
Option.TOUCH_XZERO = getinteger(argv[2]);
Option.TOUCH_YZERO = getinteger(argv[4]);
Option.TOUCH_XSCALE = getinteger(argv[6]) / 10000.0;
Option.TOUCH_YSCALE = getinteger(argv[8]) / 10000.0;
if(!CurrentLinePtr) SaveOptions();
return;
} else {
if(CurrentLinePtr) error("Invalid in a program");
}
calibrate=1;
GetCalibration(TARGET_OFFSET, TARGET_OFFSET, &tlx, &tly);
GetCalibration(HRes - TARGET_OFFSET, TARGET_OFFSET, &trx, &try);
if(abs(trx - tlx) < CAL_ERROR_MARGIN && abs(tly - try) < CAL_ERROR_MARGIN) {
calibrate=0;
error("Touch hardware failure");
}
GetCalibration(TARGET_OFFSET, VRes - TARGET_OFFSET, &blx, &bly);
GetCalibration(HRes - TARGET_OFFSET, VRes - TARGET_OFFSET, &brx, &bry);
calibrate=0;
midy = max(max(tly, try), max(bly, bry)) / 2;
Option.TOUCH_SWAPXY = ((tly < midy && try > midy) || (tly > midy && try < midy));
if(Option.TOUCH_SWAPXY) {
swap(tlx, tly);
swap(trx, try);
swap(blx, bly);
swap(brx, bry);
}
Option.TOUCH_XSCALE = (MMFLOAT)(HRes - TARGET_OFFSET * 2) / (MMFLOAT)(trx - tlx);
Option.TOUCH_YSCALE = (MMFLOAT)(VRes - TARGET_OFFSET * 2) / (MMFLOAT)(bly - tly);
Option.TOUCH_XZERO = ((MMFLOAT)tlx - ((MMFLOAT)TARGET_OFFSET / Option.TOUCH_XSCALE));
Option.TOUCH_YZERO = ((MMFLOAT)tly - ((MMFLOAT)TARGET_OFFSET / Option.TOUCH_YSCALE));
SaveOptions();
brx = (HRes - TARGET_OFFSET) - ((brx - Option.TOUCH_XZERO) * Option.TOUCH_XSCALE);
bry = (VRes - TARGET_OFFSET) - ((bry - Option.TOUCH_YZERO)*Option.TOUCH_YSCALE);
if(abs(brx) > CAL_ERROR_MARGIN || abs(bry) > CAL_ERROR_MARGIN) {
s = "Warning: Inaccurate calibration\r\n";
} else
s = "Done. No errors\r\n";
CurrentX = CurrentY = 0;
MMPrintString(s);
strcpy((char *)inpbuf, "Deviation X = "); IntToStr((char *)inpbuf + strlen((char *)inpbuf), brx, 10);
strcat((char *)inpbuf, ", Y = "); IntToStr((char *)inpbuf + strlen((char *)inpbuf), bry, 10); strcat((char *)inpbuf, " (pixels)\r\n");
MMPrintString((char *)inpbuf);
if(!Option.DISPLAY_CONSOLE) {
GUIPrintString(0, 0, 0x11, JUSTIFY_LEFT, JUSTIFY_TOP, ORIENT_NORMAL, WHITE, BLACK, s);
GUIPrintString(0, 36, 0x11, JUSTIFY_LEFT, JUSTIFY_TOP, ORIENT_NORMAL, WHITE, BLACK, (char *)inpbuf);
}
return;
}
#endif
if((p = checkstring(cmdline, (unsigned char *)"TEST"))) {
if((checkstring(p, (unsigned char *)"LCDPANEL"))) {
int t;
t = ((HRes > VRes) ? HRes : VRes) / 7;
while(getConsole() < '\r') {
#ifdef PICOMITEWEB
{if(startupcomplete)ProcessWeb(1);}
#endif
DrawCircle(rand() % HRes, rand() % VRes, (rand() % t) + t/5, 1, 1, rgb((rand() % 8)*256/8, (rand() % 8)*256/8, (rand() % 8)*256/8), 1);
#ifdef PICOMITEVGA
uSec(5000);
#endif
}
ClearScreen(gui_bcolour);
return;
}
#ifndef PICOMITEVGA
if((checkstring(p, (unsigned char *)"TOUCH"))) {
int x, y;
ClearScreen(gui_bcolour);
while(getConsole() < '\r') {
x = GetTouch(GET_X_AXIS);
y = GetTouch(GET_Y_AXIS);
if(x != TOUCH_ERROR && y != TOUCH_ERROR) DrawBox(x - 1, y - 1, x + 1, y + 1, 0, WHITE, WHITE);
}
ClearScreen(gui_bcolour);
return;
}
#endif
}
error("Unknown command");
}
void getargaddress (unsigned char *p, long long int **ip, MMFLOAT **fp, int *n){
unsigned char *ptr=NULL;
*fp=NULL;
*ip=NULL;
char pp[STRINGSIZE]={0};
strcpy(pp,(char *)p);
if(!isnamestart(pp[0])){ //found a literal
*n=1;
return;
}
ptr = findvar((unsigned char *)pp, V_FIND | V_EMPTY_OK | V_NOFIND_NULL);
if(ptr && vartbl[VarIndex].type & (T_NBR | T_INT)) {
if(vartbl[VarIndex].dims[0] <= 0){ //simple variable
*n=1;
return;
} else { // array or array element
if(*n == 0)*n=vartbl[VarIndex].dims[0] + 1 - OptionBase;
else *n = (vartbl[VarIndex].dims[0] + 1 - OptionBase)< *n ? (vartbl[VarIndex].dims[0] + 1 - OptionBase) : *n;
skipspace(p);
do {
p++;
} while(isnamechar(*p));
if(*p == '!' || *p== '%') p++;
if(*p == '(') {
p++;
skipspace(p);
if(*p != ')') { //array element
*n=1;
return;
}
}
}
if(vartbl[VarIndex].dims[1] != 0) error("Invalid variable");
if(vartbl[VarIndex].type & T_NBR)*fp = (MMFLOAT*)ptr;
else *ip = (long long int *)ptr;
} else {
*n=1; //may be a function call
}
}
/****************************************************************************************************
General purpose drawing routines
****************************************************************************************************/
int rgb(int r, int g, int b) {
return RGB(r, g, b);
}
void getcoord(char *p, int *x, int *y) {
unsigned char *tp, *ttp;
char b[STRINGSIZE];
char savechar;
tp = getclosebracket((unsigned char *)p);
savechar=*tp;
*tp = 0; // remove the closing brackets
strcpy(b, p); // copy the coordinates to the temp buffer
*tp = savechar; // put back the closing bracket
ttp = (unsigned char *)b+1;
// kludge (todo: fix this)
{
getargs(&ttp, 3, (unsigned char *)","); // this is a macro and must be the first executable stmt in a block
if(argc != 3) error("Invalid Syntax");
*x = getinteger(argv[0]);
*y = getinteger(argv[2]);
}
}
int getColour(char *c, int minus){
int colour;
if(CMM1){
colour = getint((unsigned char *)c,(minus ? -1: 0),15);
if(colour>=0)colour=CMM1map[colour];
} else colour=getint((unsigned char *)c,(minus ? -1: 0),0xFFFFFFF);
return colour;
}
#ifndef PICOMITEVGA
void DrawPixelNormal(int x, int y, int c) {
DrawRectangle(x, y, x, y, c);
}
#endif
void ClearScreen(int c) {
DrawRectangle(0, 0, HRes - 1, VRes - 1, c);
#ifdef PICOMITEVGA
if(DISPLAY_TYPE==SCREENMODE1){
#ifdef HDMI
memset(DisplayBuf,0,ScreenSize);
if(Option.CPU_Speed==Freq480P){
uint16_t bcolour = RGB555(c);
for(int x=0;x<X_TILE;x++){
for(int y=0;y<Y_TILE;y++){
tilefcols[y*X_TILE+x]=Option.VGAFC;
tilebcols[y*X_TILE+x]=bcolour;
}
}
} else {
uint8_t bcolour = RGB332(c);
for(int x=0;x<X_TILE;x++){
for(int y=0;y<Y_TILE;y++){
tilefcols_w[y*X_TILE+x]=Option.VGAFC;
tilebcols_w[y*X_TILE+x]=bcolour;
}
}
}
CurrentX=CurrentY=0;
#else
memset(WriteBuf,0,ScreenSize);
int bcolour = RGB121(c);
bcolour= (bcolour<<12) | (bcolour<<8) | (bcolour<<4) | bcolour;
for(int x=0;x<X_TILE;x++){
for(int y=0;y<Y_TILE;y++){
tilefcols[y*X_TILE+x]=Option.VGAFC;
tilebcols[y*X_TILE+x]=bcolour;
}
}
#endif
}
#endif
}
void DrawBuffered(int xti, int yti, int c, int complete){
static unsigned char pos=0;
static unsigned char movex, movey, movec;
static short xtilast[8];
static short ytilast[8];
static int clast[8];
xtilast[pos]=xti;
ytilast[pos]=yti;
clast[pos]=c;
if(complete==1){
if(pos==1){
DrawPixel(xtilast[0],ytilast[0],clast[0]);
} else {
DrawLine(xtilast[0],ytilast[0],xtilast[pos-1],ytilast[pos-1],1,clast[0]);
}
pos=0;
} else {
if(pos==0){
movex = movey = movec = 1;
pos+=1;
} else {
if(xti==xtilast[0] && abs(yti-ytilast[pos-1])==1)movex=0;else movex=1;
if(yti==ytilast[0] && abs(xti-xtilast[pos-1])==1)movey=0;else movey=1;
if(c==clast[0])movec=0;else movec=1;
if(movec==0 && (movex==0 || movey==0) && pos<6) pos+=1;
else {
if(pos==1){
DrawPixel(xtilast[0],ytilast[0],clast[0]);
} else {
DrawLine(xtilast[0],ytilast[0],xtilast[pos-1],ytilast[pos-1],1,clast[0]);
}
movex = movey = movec = 1;
xtilast[0]=xti;
ytilast[0]=yti;
clast[0]=c;
pos=1;
}
}
}
}
/**************************************************************************************************
Draw a line on a the video output
x1, y1 - the start coordinate
x2, y2 - the end coordinate
w - the width of the line (ignored for diagional lines)
c - the colour to use
***************************************************************************************************/
#define abs( a) (((a)> 0) ? (a) : -(a))
int SizeLine(int x1, int y1, int x2, int y2){
int n=0;
if(y1 == y2) {
return abs(x1-x2)+1;
}
if(x1 == x2) {
return abs(y1-y2)+1;
}
int dx, dy, sx, sy, err, e2;
dx = abs(x2 - x1); sx = x1 < x2 ? 1 : -1;
dy = -abs(y2 - y1); sy = y1 < y2 ? 1 : -1;
err = dx + dy;
while(1) {
n++;
e2 = 2 * err;
if (e2 >= dy) {
if (x1 == x2) break;
err += dy; x1 += sx;
}
if (e2 <= dx) {
if (y1 == y2) break;
err += dx; y1 += sy;
}
}
return n;
}
void ReadLine(int x1,int y1,int x2,int y2, char *buff){
if(y1 == y2 || x1 == x2) {
ReadBuffer(x1, y1, x2, y2, (unsigned char *)buff); // horiz line
return;
}
int dx, dy, sx, sy, err, e2;
dx = abs(x2 - x1); sx = x1 < x2 ? 1 : -1;
dy = -abs(y2 - y1); sy = y1 < y2 ? 1 : -1;
err = dx + dy;
while(1) {
ReadBuffer(x1, y1, x1, y1, (unsigned char *)buff);
buff+=3;
e2 = 2 * err;
if (e2 >= dy) {
if (x1 == x2) break;
err += dy; x1 += sx;
}
if (e2 <= dx) {
if (y1 == y2) break;
err += dx; y1 += sy;
}
}
}
void RestoreLine(int x1,int y1,int x2,int y2, char *buff){
if(y1 == y2 || x1 == x2) {
DrawBuffer(x1, y1, x2, y2, (unsigned char *)buff); // horiz line
return;
}
int dx, dy, sx, sy, err, e2;
dx = abs(x2 - x1); sx = x1 < x2 ? 1 : -1;
dy = -abs(y2 - y1); sy = y1 < y2 ? 1 : -1;
err = dx + dy;
while(1) {
DrawBuffer(x1, y1, x1, y1, (unsigned char *)buff);
buff+=3;
e2 = 2 * err;
if (e2 >= dy) {
if (x1 == x2) break;
err += dy; x1 += sx;
}
if (e2 <= dx) {
if (y1 == y2) break;
err += dx; y1 += sy;
}
}
}
void DrawLine(int x1, int y1, int x2, int y2, int w, int c) {
if(y1 == y2) {
DrawRectangle(x1, y1, x2, y2 + w - 1, c); // horiz line
if(Option.Refresh)Display_Refresh();
return;
}
if(x1 == x2) {
DrawRectangle(x1, y1, x2 + w - 1, y2, c); // vert line
if(Option.Refresh)Display_Refresh();
return;
}
int dx, dy, sx, sy, err, e2;
dx = abs(x2 - x1); sx = x1 < x2 ? 1 : -1;
dy = -abs(y2 - y1); sy = y1 < y2 ? 1 : -1;
err = dx + dy;
while(1) {
DrawBuffered(x1, y1, c,0);
e2 = 2 * err;
if (e2 >= dy) {
if (x1 == x2) break;
err += dy; x1 += sx;
}
if (e2 <= dx) {
if (y1 == y2) break;
err += dx; y1 += sy;
}
}
DrawBuffered(0, 0, 0, 1);
if(Option.Refresh)Display_Refresh();
}
/**********************************************************************************************
Draw a box
x1, y1 - the start coordinate
x2, y2 - the end coordinate
w - the width of the sides of the box (can be zero)
c - the colour to use for sides of the box
fill - the colour to fill the box (-1 for no fill)
***********************************************************************************************/
void DrawBox(int x1, int y1, int x2, int y2, int w, int c, int fill) {
int t;
// make sure the coordinates are in the right sequence
if(x2 <= x1) { t = x1; x1 = x2; x2 = t; }
if(y2 <= y1) { t = y1; y1 = y2; y2 = t; }
if(w > x2 - x1) w = x2 - x1;
if(w > y2 - y1) w = y2 - y1;
if(w > 0) {
w--;
DrawRectangle(x1, y1, x2, y1 + w, c); // Draw the top horiz line
DrawRectangle(x1, y2 - w, x2, y2, c); // Draw the bottom horiz line
DrawRectangle(x1, y1, x1 + w, y2, c); // Draw the left vert line
DrawRectangle(x2 - w, y1, x2, y2, c); // Draw the right vert line
w++;
}
if(fill >= 0)
DrawRectangle(x1 + w, y1 + w, x2 - w, y2 - w, fill);
}
/**********************************************************************************************
Draw a box with rounded corners
x1, y1 - the start coordinate
x2, y2 - the end coordinate
radius - the radius (in pixels) of the arc forming the corners
c - the colour to use for sides
fill - the colour to fill the box (-1 for no fill)
***********************************************************************************************/
void MIPS16 DrawRBox(int x1, int y1, int x2, int y2, int radius, int c, int fill) {
int f, ddF_x, ddF_y, xx, yy;
f = 1 - radius;
ddF_x = 1;
ddF_y = -2 * radius;
xx = 0;
yy = radius;
while(xx < yy) {
if(f >= 0) {
yy-=1;
ddF_y += 2;
f += ddF_y;
}
xx+=1;
ddF_x += 2;
f += ddF_x ;
DrawPixel(x2 + xx - radius, y2 + yy - radius, c); // Bottom Right Corner
DrawPixel(x2 + yy - radius, y2 + xx - radius, c); // ^^^
DrawPixel(x1 - xx + radius, y2 + yy - radius, c); // Bottom Left Corner
DrawPixel(x1 - yy + radius, y2 + xx - radius, c); // ^^^
DrawPixel(x2 + xx - radius, y1 - yy + radius, c); // Top Right Corner
DrawPixel(x2 + yy - radius, y1 - xx + radius, c); // ^^^
DrawPixel(x1 - xx + radius, y1 - yy + radius, c); // Top Left Corner
DrawPixel(x1 - yy + radius, y1 - xx + radius, c); // ^^^
if(fill >= 0) {
DrawLine(x2 + xx - radius - 1, y2 + yy - radius, x1 - xx + radius + 1, y2 + yy - radius, 1, fill);
DrawLine(x2 + yy - radius - 1, y2 + xx - radius, x1 - yy + radius + 1, y2 + xx - radius, 1, fill);
DrawLine(x2 + xx - radius - 1, y1 - yy + radius, x1 - xx + radius + 1, y1 - yy + radius, 1, fill);
DrawLine(x2 + yy - radius - 1, y1 - xx + radius, x1 - yy + radius + 1, y1 - xx + radius, 1, fill);
}
}
if(fill >= 0) DrawRectangle(x1 + 1, y1 + radius, x2 - 1, y2 - radius, fill);
DrawRectangle(x1 + radius - 1, y1, x2 - radius + 1, y1, c); // top side
DrawRectangle(x1 + radius - 1, y2, x2 - radius + 1, y2, c); // botom side
DrawRectangle(x1, y1 + radius, x1, y2 - radius, c); // left side
DrawRectangle(x2, y1 + radius, x2, y2 - radius, c); // right side
if(Option.Refresh)Display_Refresh();
}
/***********************************************************************************************
Draw a circle on the video output
x, y - the center of the circle
radius - the radius of the circle
w - width of the line drawing the circle
c - the colour to use for the circle
fill - the colour to use for the fill or -1 if no fill
aspect - the ration of the x and y axis (a MMFLOAT). 1.0 gives a prefect circle
***********************************************************************************************/
/***********************************************************************************************
Draw a circle on the video output
x, y - the center of the circle
radius - the radius of the circle
w - width of the line drawing the circle
c - the colour to use for the circle
fill - the colour to use for the fill or -1 if no fill
aspect - the ration of the x and y axis (a MMFLOAT). 1.0 gives a prefect circle
***********************************************************************************************/
void DrawCircle(int x, int y, int radius, int w, int c, int fill, MMFLOAT aspect) {
int a, b, P;
int A, B;
int asp;
MMFLOAT aspect2;
if(w>1){
if(fill>=0){ // thick border with filled centre
DrawCircle(x,y,radius,0,c,c,aspect);
aspect2=((aspect*(MMFLOAT)radius)-(MMFLOAT)w)/((MMFLOAT)(radius-w));
DrawCircle(x,y,radius-w,0,fill,fill,aspect2);
} else { //thick border with empty centre
int r1=radius-w,r2=radius, xs=-1,xi=0, i,j,k,m, ll=radius;
if(aspect>1.0)ll=(int)((MMFLOAT)radius*aspect);
int ints_per_line=RoundUptoInt((ll*2)+1)/32;
uint32_t *br=(uint32_t *)GetTempMemory(((ints_per_line+1)*((r2*2)+1))*4);
DrawFilledCircle(x, y, r2, r2, 1, ints_per_line, br, aspect, aspect);
aspect2=((aspect*(MMFLOAT)r2)-(MMFLOAT)w)/((MMFLOAT)r1);
DrawFilledCircle(x, y, r1, r2, 0, ints_per_line, br, aspect, aspect2);
x=(int)((MMFLOAT)x+(MMFLOAT)r2*(1.0-aspect));
for(j=0;j<r2*2+1;j++){
for(i=0;i<ints_per_line;i++){
k=br[i+j*ints_per_line];
for(m=0;m<32;m++){
if(xs==-1 && (k & 0x80000000)){
xs=m;
xi=i;
}
if(xs!=-1 && !(k & 0x80000000)){
DrawRectangle(x-r2+xs+xi*32, y-r2+j, x-r2+m+i*32, y-r2+j, c);
xs=-1;
}
k<<=1;
}
}
if(xs!=-1){
DrawRectangle(x-r2+xs+xi*32, y-r2+j, x-r2+m+i*32, y-r2+j, c);
xs=-1;
}
}
}
} else { //single thickness outline
int w1=w,r1=radius;
if(fill>=0){
while(w >= 0 && radius > 0) {
a = 0;
b = radius;
P = 1 - radius;
asp = aspect * (MMFLOAT)(1 << 10);
do {
A = (a * asp) >> 10;
B = (b * asp) >> 10;
if(fill >= 0 && w >= 0) {
DrawRectangle(x-A, y+b, x+A, y+b, fill);
DrawRectangle(x-A, y-b, x+A, y-b, fill);
DrawRectangle(x-B, y+a, x+B, y+a, fill);
DrawRectangle(x-B, y-a, x+B, y-a, fill);
}
if(P < 0)
P+= 3 + 2*a++;
else
P+= 5 + 2*(a++ - b--);
} while(a <= b);
w--;
radius--;
}
}
if(c!=fill){
w=w1; radius=r1;
while(w >= 0 && radius > 0) {
a = 0;
b = radius;
P = 1 - radius;
asp = aspect * (MMFLOAT)(1 << 10);
do {
A = (a * asp) >> 10;
B = (b * asp) >> 10;
if(w) {
DrawPixel(A+x, b+y, c);
DrawPixel(B+x, a+y, c);
DrawPixel(x-A, b+y, c);
DrawPixel(x-B, a+y, c);
DrawPixel(B+x, y-a, c);
DrawPixel(A+x, y-b, c);
DrawPixel(x-A, y-b, c);
DrawPixel(x-B, y-a, c);
}
if(P < 0)
P+= 3 + 2*a++;
else
P+= 5 + 2*(a++ - b--);
} while(a <= b);
w--;
radius--;
}
}
}
if(Option.Refresh)Display_Refresh();
}
void ClearTriangle(int x0, int y0, int x1, int y1, int x2, int y2, int ints_per_line, uint32_t *br) {
if (x0 * (y1 - y2) + x1 * (y2 - y0) + x2 * (y0 - y1) == 0)return;
long a, b, y, last;
long dx01, dy01, dx02, dy02, dx12, dy12, sa, sb;
if (y0 > y1) {
swap(y0, y1);
swap(x0, x1);
}
if (y1 > y2) {
swap(y2, y1);
swap(x2, x1);
}
if (y0 > y1) {
swap(y0, y1);
swap(x0, x1);
}
dx01 = x1 - x0; dy01 = y1 - y0; dx02 = x2 - x0;
dy02 = y2 - y0; dx12 = x2 - x1; dy12 = y2 - y1;
sa = 0; sb = 0;
if(y1 == y2) {
last = y1; //Include y1 scanline
} else {
last = y1 - 1; // Skip it
}
for (y = y0; y <= last; y++){
a = x0 + sa / dy01;
b = x0 + sb / dy02;
sa = sa + dx01;
sb = sb + dx02;
a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
if(a > b)swap(a, b);
hline(a, b, y, 0, ints_per_line, br);
}
sa = dx12 * (y - y1);
sb = dx02 * ( y- y0);
while (y <= y2){
a = x1 + sa / dy12;
b = x0 + sb / dy02;
sa = sa + dx12;
sb = sb + dx02;
a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
if(a > b) swap(a, b);
hline(a, b, y, 0, ints_per_line, br);
y = y + 1;
}
}
#define ABS(X) ((X)>0 ? (X) : (-(X)))
void CalcLine(int x1, int y1, int x2, int y2, short *xmin, short *xmax) {
if(y1 == y2) {
if(y1<0)y1=0;
if(y1>=VRes)y1=VRes-1;
if(y2<0)y2=0;
if(y2>=VRes)y2=VRes-1;
if(x1<xmin[y1])xmin[y1]=x1;
if(x2<xmin[y1])xmin[y1]=x2;
if(x1>xmax[y1])xmax[y1]=x1;
if(x2>xmax[y1])xmax[y1]=x2;
return;
}
if(x1 == x2) {
if(y2<y1)swap(y2,y1);
if(y1<0)y1=0;
if(y1>=VRes)y1=VRes-1;
if(y2<0)y2=0;
if(y2>=VRes)y2=VRes-1;
for(int y=y1;y<=y2;y++) {
if(x1<xmin[y])xmin[y]=x1;
if(x1>xmax[y])xmax[y]=x1;
}
return;
}
// uses a variant of Bresenham's line algorithm:
// https://en.wikipedia.org/wiki/Talk:Bresenham%27s_line_algorithm
if (y1 > y2) {
swap(y1, y2);
swap(x1, x2);
}
if(y1<0)y1=0;
if(y1>=VRes)y1=VRes-1;
if(y2<0)y2=0;
if(y2>=VRes)y2=VRes-1;
int absX = ABS(x1-x2); // absolute value of coordinate distances
int absY = ABS(y1-y2);
int offX = x2<x1 ? 1 : -1; // line-drawing direction offsets
int offY = y2<y1 ? 1 : -1;
int x = x2; // incremental location
int y = y2;
int err;
if(x<xmin[y])xmin[y]=x;
if(x>xmax[y])xmax[y]=x;
if (absX > absY) {
// line is more horizontal; increment along x-axis
err = absX / 2;
while (x != x1) {
err = err - absY;
if (err < 0) {
y += offY;
err += absX;
}
x += offX;
if(x<xmin[y])xmin[y]=x;
if(x>xmax[y])xmax[y]=x;
}
} else {
// line is more vertical; increment along y-axis
err = absY / 2;
while (y != y1) {
err = err - absX;
if (err < 0) {
x += offX;
err += absY;
}
y += offY;
if(x<xmin[y])xmin[y]=x;
if(x>xmax[y])xmax[y]=x;
}
}
}
void DrawTriangle(int x0, int y0, int x1, int y1, int x2, int y2, int c, int f) {
if(x0 * (y1 - y2) + x1 * (y2 - y0) + x2 * (y0 - y1)==0){ // points are co-linear i.e zero area
if (y0 > y1) {
swap(y0, y1);
swap(x0, x1);
}
if (y1 > y2) {
swap(y2, y1);
swap(x2, x1);
}