From 3dc61fd55d97a407e18a3306263b7013302f4130 Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Wed, 3 Apr 2019 22:06:00 +1300
Subject: Add lines counter/scoring

---
 config.mk |  2 +-
 plot.c    | 25 +++++++++++++++++++++++++
 plot.h    |  1 +
 tetris.c  | 24 ++++++++++++++++++++++--
 4 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/config.mk b/config.mk
index 39f6a44..5ab5f49 100644
--- a/config.mk
+++ b/config.mk
@@ -1,2 +1,2 @@
 CFLAGS      += -I/usr/include/SDL2 -Wall -Wextra -Wpedantic -pedantic-errors
-LDFLAGS     += -lSDL2
+LDFLAGS     += -lSDL2 -lSDL2_ttf
diff --git a/plot.c b/plot.c
index 3cf2c0d..7a7a54e 100644
--- a/plot.c
+++ b/plot.c
@@ -1,4 +1,5 @@
 #include <SDL.h>
+#include <SDL_ttf.h>
 
 #include "colour.h"
 #include "plot.h"
@@ -40,6 +41,30 @@ plot_cell(unsigned int x, unsigned int y, struct colour *c)
 }
 
 void
+plot_text(const char *message, TTF_Font *font, SDL_Color color, int x, int y)
+{
+	SDL_Texture *texture = NULL;
+	SDL_Rect dst;
+	dst.x = x;
+	dst.y = y;
+	SDL_Surface *surf = TTF_RenderUTF8_Blended(font, message, color);
+	if (!surf) {
+		printf("Error in TTF_RenderUTF8_Blended\n");
+		return;
+	}
+	texture = SDL_CreateTextureFromSurface(renderer, surf);
+	if (!texture){
+		printf("Error in SDL_CreateTextureFromSurface\n");
+	}
+	SDL_FreeSurface(surf);
+
+	SDL_QueryTexture(texture, NULL, NULL, &dst.w, &dst.h);
+	SDL_RenderCopy(renderer, texture, NULL, &dst);
+
+	SDL_DestroyTexture(texture);
+}
+
+void
 plot_clear(void)
 {
 	/* blank out the background with black */
diff --git a/plot.h b/plot.h
index edde581..75accc8 100644
--- a/plot.h
+++ b/plot.h
@@ -1,5 +1,6 @@
 void plot_rect(unsigned int x, unsigned int y, unsigned int width, unsigned int height, struct colour *c);
 void plot_cell(unsigned int x, unsigned int y, struct colour *c);
+void plot_text(const char *message, TTF_Font *font, SDL_Color color, int x, int y);
 void plot_clear(void);
 int plot_init(void);
 void plot_update(void);
diff --git a/tetris.c b/tetris.c
index 4b4b8f1..bc7e0d0 100644
--- a/tetris.c
+++ b/tetris.c
@@ -2,12 +2,16 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <SDL.h>
+#include <SDL_ttf.h>
 #include <time.h>
 
 #include "colour.h"
 #include "tetromino.h"
 #include "plot.h"
 
+#define FONT_FILE "/usr/share/fonts/TTF/arial.ttf"
+#define FONT_SIZE 16
+
 #define VERSION "1.0"
 #define TETROMINO_WIDTH  4
 #define TETROMINO_HEIGHT 4
@@ -163,9 +167,10 @@ rotate(struct piece *held, int direction)
 	update_bitmap(held);
 }
 
-void
+int
 clear_rows(struct colour* (*board)[WIDTH_CELLS][HEIGHT_CELLS])
 {
+	int rows = 0;
 	char row;
 	int x, y, x1, y1;
 	for (y = 0; y < HEIGHT_CELLS; y++) {
@@ -179,6 +184,8 @@ clear_rows(struct colour* (*board)[WIDTH_CELLS][HEIGHT_CELLS])
 		if (!row)
 			continue;
 
+		rows++;
+
 		for (y1 = y; y1 > 0; y1--)
 			for (x1 = 0; x1 < WIDTH_CELLS; x1++)
 				(*board)[x1][y1] = (*board)[x1][y1-1];
@@ -186,6 +193,7 @@ clear_rows(struct colour* (*board)[WIDTH_CELLS][HEIGHT_CELLS])
 		for (x1 = 0; x1 < WIDTH_CELLS; x1++)
 			(*board)[x1][y1] = &(palette[0]);
 	}
+	return rows;
 }
 
 void
@@ -197,11 +205,18 @@ main_loop()
 	int i = 0;
 	int x = 0;
 	int y = 0;
+	int score = 0;
 	int last_x = 0;
 	int last_y = 1;
 	struct piece held;
 	new_piece(&held);
 
+	TTF_Font *font = TTF_OpenFont(FONT_FILE, FONT_SIZE);
+	if (!font) {
+		printf("TTF_OpenFont: %s\n", TTF_GetError());
+		return;
+	}
+
 	for (y = 0; y < HEIGHT_CELLS; y++)
 		for (x = 0; x < WIDTH_CELLS; x++)
 			board[x][y] = &(palette[0]);
@@ -213,7 +228,7 @@ main_loop()
 
 	while (running) {
 		lockout = 0;
-		clear_rows(&board);
+		score += clear_rows(&board);
 
 		if (hit_side(x, y, &held, &board))
 			x = last_x;
@@ -223,6 +238,10 @@ main_loop()
 
 		draw_board(&board);
 		draw_piece(x, y, held.colour, held.bitmap);
+		char score_string[16];
+		snprintf(score_string, sizeof(score_string), "Score: %d", score);
+		score_string[sizeof(score_string) - 1] = '\0';
+		plot_text(score_string, font, ((SDL_Color){255,255,255,255}), 10, 10);
 		plot_update();
 		SDL_WaitEvent(&e);
 		if (pause_mode) {
@@ -289,6 +308,7 @@ int
 main(int argc, char **argv)
 {
 	char *argument = NULL;
+	TTF_Init();
 
 	speed_mode = 0;
 	pause_mode = 0;
-- 
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