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stm32samples/F1:F103/Tetris/tetris.c
Edward Emelianov 733dbd75d2 restructuring
2022-03-10 11:04:14 +03:00

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/*
* This file is part of the TETRIS project.
* Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program 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.
*
* This program 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/>.
*/
#include "adcrandom.h"
#include "buttons.h"
#include "debug.h"
#include "fonts.h"
#include "screen.h"
#include "tetris.h"
// backround color
#define BACKGROUND_COLOR (COLOR_BLACK)
#define FOREGROUND_COLOR (COLOR_LYELLOW)
#define CUP_COLOR (COLOR_LRED)
// height of cup
#define CUPHEIGHT (31)
#define CUPWIDTH (14)
// screen coordinate of x=0 @ cup
#define CUPX0 (7)
// screen coordinate of y=0 @ cup (Y grows upside down)
#define CUPY0 (0)
// coordinates of "NEXT figure"
#define NEXTX0 (-5)
#define NEXTY0 (SCREEN_HEIGHT/2-2)
#define xmax (CUPWIDTH-1)
#define ymax (CUPHEIGHT-1)
// min speed
#define MAXSTEPMS (299)
// max speed / drop speed
#define MINSTEPMS (19)
// each NXTSPEEDSCORE of score the speed will be increased
#define NXTSPEEDSCORE (50)
extern uint32_t Tms;
// get coordinates by figure member
#define GETX(u) (((u) >> 4) - 2)
#define GETY(u) (((u) & 0xf) - 2)
typedef struct{
uint8_t f[4];
uint8_t color;
} figure;
// L: 00, 01, 02, 10 + 2 = 0x22, 0x23, 0x24, 0x32
static const figure L = {
.f = {0x22, 0x23, 0x24, 0x32},
.color = 0b00000001
};
// J: 00, 01, 02, -10 + 2 = 0x22, 0x23, 0x24, 0x12
static const figure J = {
.f = {0x22, 0x23, 0x24, 0x12},
.color = 0b00000001
};
// O: 00, 01, 10, 11 + 2 = 0x22, 0x23, 0x32, 0x33
static const figure O = {
.f = {0x22, 0x23, 0x32, 0x33},
.color = 0b00000101
};
// I: 0-1, 00, 01, 02 + 2 = 0x21, 0x22, 0x23, 0x24
static const figure I = {
.f = {0x21, 0x22, 0x23, 0x24},
.color = 0b00100000
};
// S: -10, 00, 01, 11 + 2 = 0x12, 0x22, 0x23, 0x33
static const figure S = {
.f = {0x12, 0x22, 0x23, 0x33},
.color = 0b00000100
};
// Z: -11, 01, 00, 10 + 2 = 0x13, 0x23, 0x22, 0x32
static const figure Z = {
.f = {0x13, 0x23, 0x22, 0x32},
.color = 0b00000100
};
// T: -10, 01, 00, 10 + 2 = 0x12, 0x23, 0x22, 0x32
static const figure T = {
.f = {0x12, 0x23, 0x22, 0x32},
.color = 0b00100101
};
#define FIGURESNUM (7)
static const figure *figures[FIGURESNUM] = {&L, &J, &O, &I, &S, &Z, &T};
static figure curfigure, nextfigure;
// current figure coordinates
static int xf, yf;
// next score the speed will be encreased
static uint32_t nextSpeedScore = 0;
// chk if figure can be put to (x,y); @return 1 if empty
static int chkfigure(int x, int y, const figure *F){
DBG("CHKFIG: x="); DBGU(x); DBG(", y="); DBGU(y); DBG(" ... ");
if(x < 0 || x > xmax){
DBG("x<0 || >xmax\n");
return 0;
}
if(y < 0 || y > ymax){
DBG("y<0 || > ymax\n");
return 0;
}
for(int i = 0; i < 4; ++i){
int xn = x + GETX(F->f[i]), yn = y + GETY(F->f[i]);
if(yn > ymax){
DBG("y > ymax\n");
return 0;
}
if(xn < 0 || xn > xmax){ // border
DBG("x out of borders\n");
return 0;
}
if(GetPix(CUPX0 + xn, CUPY0 + yn) != BACKGROUND_COLOR){ // occupied
DBG("occupied\n");
return 0;
}
}
DBG("good\n");
return 1;
}
// clear figure from old location
static void clearfigure(int x, int y){
DBG("Clear @ "); DBGU(x); DBG(", "); DBGU(y); NL();
for(int i = 0; i < 4; ++i){
int xn = x + GETX(curfigure.f[i]), yn = y + GETY(curfigure.f[i]);
//if(xn < 0 || xn > xmax || yn < 0 || yn > ymax) continue; // out of cup
DrawPix(CUPX0 + xn, CUPY0 + yn, BACKGROUND_COLOR);
}
}
// put figure into new location
static void putfigure(int x, int y, figure *F){
DBG("Put @ "); DBGU(x); DBG(", "); DBGU(y); NL();
for(int i = 0; i < 4; ++i){
int xn = x + GETX(F->f[i]), yn = y + GETY(F->f[i]);
//if(xn < 0 || xn > xmax || yn < 0 || yn > ymax) continue; // out of cup
DrawPix(CUPX0 + xn, CUPY0 + yn, F->color);
}
}
// dir=-1 - right, =1 - left
static void rotatefigure(int dir, figure *F){
figure nF = {.color = F->color};
for(int i = 0; i < 4; ++i){
int x = GETX(F->f[i]), y = GETY(F->f[i]), xn, yn;
if(dir > 0){ // CW
xn = y; yn = -x;
DBG("Rotate CW\n");
}else if(dir < 0){ // CCW
xn = -y; yn = x;
DBG("Rotate CCW\n");
}
nF.f[i] = ((xn + 2) << 4) | (yn + 2);
}
*F = nF;
}
// check cup for full lines & delete them; return number of deleted lines
static int checkandroll(){
int upper = 0, ret = 0;
for(int y = 0; y < CUPHEIGHT; ++y){
int N = 0;
for(int x = 0; x < CUPWIDTH; ++x)
if(GetPix(CUPX0 + x, CUPY0 + y) != BACKGROUND_COLOR) ++N;
if(N == 0) upper = y;
else if(N == CUPWIDTH){ // full line - roll all upper
DBG("========= Full row! ========= "); DBG("y="); DBGU(y); DBG(", upper="); DBGU(upper); NL();
++ret;
for(int yy = y; yy > upper; --yy){
uint8_t *ptr = &screenbuf[(yy+CUPY0)*SCREEN_WIDTH + CUPX0];
for(int x = 0; x < CUPWIDTH; ++x, ++ptr)
*ptr = ptr[-SCREEN_WIDTH]; // copy upper row into the current
}
++upper;
}
}
DBG("Roll="); DBGU(ret); NL();
return ret;
}
// get random number of next figure
static int getrand(){
static int oldnum[2] = {-1, -1};
int r = getRand() % FIGURESNUM;
if(r == oldnum[1]) r = getRand() % FIGURESNUM;
if(r == oldnum[0]) r = getRand() % FIGURESNUM;
oldnum[0] = oldnum[1];
oldnum[1] = r;
return r;
}
// return 0 if cannot move by y
static int mvfig(int *x, int *y, int dx){
register int xx = *x, yy = *y;
DBG("MVFIG: x="); DBGU(*x); DBG(", y="); DBGU(*y); DBG(", dx="); DBGU(dx); NL();
int ret = 1;
clearfigure(xx, yy);
// check dx:
if(dx){
int step = 1;
if(dx < 0){step = -1; dx = -dx;}
while(dx){
if(chkfigure(xx + step, yy, &curfigure)){
xx = xx + step; *x = xx;
}else break;
--dx;
}
}
if(chkfigure(xx, yy+1, &curfigure)){
++yy; *y = yy;
}else ret = 0;
putfigure(xx, yy, &curfigure);
return ret;
}
// dir == -1 - left, 1 - right
static void rotfig(int x, int y, int dir){
if(!dir) return;
DBG("Rotate "); DBGU(dir); NL();
figure newF = curfigure;
rotatefigure(dir, &newF);
clearfigure(x, y);
if(chkfigure(x, y, &newF)){ // can rotate - substitute old figure with new
curfigure = newF;
}
putfigure(x, y, &curfigure);
}
// draw current & next figures; return 0 if can't
static int drawnext(){
DBG("\n\nDraw next figure\n");
curfigure = nextfigure;
clearfigure(NEXTX0, NEXTY0); // clear NEXT
nextfigure = *figures[getrand()];
putfigure(NEXTX0, NEXTY0, &nextfigure);
xf = xmax/2; yf = 1;
if(!chkfigure(xf, yf, &curfigure)) return 0; // can't draw next
putfigure(xf, yf, &curfigure);
Tlast = Tms;
incSpd = StepMS;
return 1;
}
void tetris_init(){
setBGcolor(BACKGROUND_COLOR);
setFGcolor(FOREGROUND_COLOR);
choose_font(FONTN8);
ClearScreen();
ScreenON();
score = 0;
nextSpeedScore = NXTSPEEDSCORE;
StepMS = MAXSTEPMS;
// draw cup
for(int y = 0; y < CUPHEIGHT; ++y){
DrawPix(CUPX0-1, CUPY0 + y, CUP_COLOR);
DrawPix(CUPX0 + CUPWIDTH, CUPY0 + y, CUP_COLOR);
}
for(int x = 0; x < CUPWIDTH + 2; ++x)
DrawPix(CUPX0 - 1 + x, CUPY0 + CUPHEIGHT, CUP_COLOR);
nextfigure = *figures[getrand()];
PutStringAt(CUPX0 + CUPWIDTH + 3, CUPY0 + 3 + curfont->height, "SCORE:");
PutStringAt(CUPX0 + CUPWIDTH + 3, CUPY0 + 3 + 2*curfont->height, "0 ");
drawnext();
}
// process tetris game; @return 0 if game is over
int tetris_process(){
static int moveX = 0, rot = 0;
static uint8_t paused = 0;
keyevent evt;
if(Tms == Tlast) return 1;
#define PRESS(x) (keystate(x, &evt) && evt == EVT_PRESS)
#define HOLD(x) (keyevt(x) == EVT_HOLD)
// change moving direction
if(keystate(KEY_U, &evt) && (evt == EVT_PRESS || evt == EVT_HOLD)){ // UP - pause
if(paused){
DBG("----> Tetris resume\n");
paused = 0;
}else{
DBG("----> Tetris paused\n");
paused = 1;
}
}
if(!paused){
if(keystate(KEY_D, &evt) && evt == EVT_PRESS){ // Down - drop
incSpd = MINSTEPMS;
}
if(PRESS(KEY_L)) // L - left
moveX = -1;
else if(HOLD(KEY_L))
moveX = -2;
if(PRESS(KEY_R)) // Right
moveX = 1;
else if(HOLD(KEY_R))
moveX = 2;
if(PRESS(KEY_M)){ // Menu - rotate CCW
rot = 1;
}
if(PRESS(KEY_S)){ // Set - rotate CW
rot = -1;
}
}
#undef PRESS
#undef HOLD
clear_events();
if(Tms - Tlast > incSpd){
Tlast = Tms;
if(paused) return 1;
int xnew = xf, ynew = yf;
if(rot){
rotfig(xf, yf, rot);
rot = 0;
}
DBG("Move down 1px\n");
if(!mvfig(&xnew, &ynew, moveX)){ // can't move: end of moving?
moveX = 0;
int s = checkandroll();
switch(s){ // add score
case 1:
score += 1;
DBG("One line!\n");
break;
case 2:
score += 3;
DBG("Two lines!\n");
break;
case 3:
score += 7;
DBG("Three lines!\n");
break;
case 4:
score += 15;
DBG("Four lines!\n");
break;
default:
break;
}
DBG("Score: "); DBG(u2str(score)); DBG("\n");
if(s){
setBGcolor(BACKGROUND_COLOR);
setFGcolor(FOREGROUND_COLOR);
choose_font(FONTN8);
uint8_t l = PutStringAt(CUPX0 + CUPWIDTH + 3, CUPY0 + 3 + 2*curfont->height, u2str(score));
PutStringAt(l+CUPX0 + CUPWIDTH + 3, CUPY0 + 3 + 2*curfont->height, " ");
}
if(StepMS > MINSTEPMS && score > nextSpeedScore){ // increase speed
--StepMS;
nextSpeedScore += NXTSPEEDSCORE;
DBG("Increase speed, StepMS="); DBG(u2str(StepMS)); DBG("\n");
}
if(!drawnext()) return 0;
}else{
moveX = 0;
xf = xnew; yf = ynew;
}
}
return 1;
}
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