From 7eb5b5f064f07bc50cafa1488961fa7be27dee22 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Mon, 26 Aug 2019 17:30:40 +0100
Subject: up-center trapezium working

---
 TODO       |  3 +--
 draw.c     | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 gramscii.c |  4 ++++
 gramscii.h | 23 +++++++++++++----------
 screen.c   |  2 ++
 5 files changed, 68 insertions(+), 12 deletions(-)

diff --git a/TODO b/TODO
index ecd2a35..3ffa3f5 100644
--- a/TODO
+++ b/TODO
@@ -1,7 +1,6 @@
 + optimize redraws (redraw only the modified rectangle)
 - add screen geometry option (-g 25x80?)
-- (?)maybe move "text" mode to "t"
-- implement trapezium
++ implement trapezium
 - implement ellipse
 - (?) filled box (B)
 - (?) manage filled box character (as for other styles)
diff --git a/draw.c b/draw.c
index e1ee63b..3e973b9 100644
--- a/draw.c
+++ b/draw.c
@@ -204,6 +204,54 @@ char flip_par_lean(char st){
 }
 
 void draw_trapezium(int x1, int y1, char st, char fix){
+	int xmin, ymin, xmax, ymax;
+	int dx, dy, ylong, yshort, xoff;
+	int xincr;
+	int i;
+	void (*f)(int, int, char);
+
+
+	xmin = MIN(x, x1);
+	xmax = MAX(x, x1);
+	ymin = MIN(y, y1);
+	ymax = MAX(y, y1);
+	dx = xmax - xmin;
+	dy = ymax - ymin;
+	
+	if (fix == FIX){
+		f = set_xy;
+		copy_lines_to_ring(ymin, ymax, PRV_STATE);
+	}
+	else
+		f = draw_xy;
+
+	/* This is valid only for "upper" trapezoids */
+	if (st & BOX_TRAP_U){
+		ylong = ymax;
+		yshort = ymin;
+		xoff = dy;
+		xincr = -1;
+	}
+	for(i=xmin+1; i<=xmax; i++){
+		f(i, ylong, line_h);
+	}
+	for(i=xmin+xoff; i<=xmax-xoff; i++){
+		f(i, yshort, line_h);
+	}
+	f(xmin+xoff, yshort, corner);
+	f(xmin, ylong, corner);
+	f(xmax-xoff, yshort, corner);
+	f(xmax, ylong, corner);
+	xoff --;
+	for(i=ymin+1; i<ymax; i++, xoff += xincr){
+		f(xmin + xoff, i, '/');
+		f(xmax - xoff, i, '\\');
+	}	
+
+	
+	if (fix == FIX)
+		copy_lines_to_ring(ymin, ymax, NEW_STATE);
+	show_cursor();
 
 }
 
diff --git a/gramscii.c b/gramscii.c
index 5c893fe..008adce 100644
--- a/gramscii.c
+++ b/gramscii.c
@@ -134,6 +134,10 @@ void commands(FILE *fc){
 				case 'r':
 					read_file_at(fc, x, y);
 					break;
+				case 't':
+					mode = TRP;
+					get_box(fc, BOX_TRAP_UC);
+					break;
 				case 'z':
 					mode = PAR;
 					get_box(fc, BOX_PARR);
diff --git a/gramscii.h b/gramscii.h
index b8c2161..f82185d 100644
--- a/gramscii.h
+++ b/gramscii.h
@@ -20,6 +20,7 @@
 #define VIS    0x10
 #define PAR    0x20
 #define REM    0x40
+#define TRP    0x80
 /**/
 
 /* directions */
@@ -37,19 +38,21 @@
 /* rectangular box */
 #define BOX_RECT 0x00
 /* parallelograms */
-#define BOX_PAR  0x04
+#define BOX_PAR  0x10
 /* parallelogram (leaning right) */
-#define BOX_PARR 0x05
+#define BOX_PARR 0x11
 /* parallelogram (leaning left) */
-#define BOX_PARL 0x06
+#define BOX_PARL 0x12
 /* trapezium */
-#define BOX_TRAP    0x10
-#define BOX_TRAP_UR 0x11
-#define BOX_TRAP_UC 0x12
-#define BOX_TRAP_UL 0x13
-#define BOX_TRAP_DL 0x14
-#define BOX_TRAP_DC 0x15
-#define BOX_TRAP_DR 0x16
+#define BOX_TRAP    0x20
+#define BOX_TRAP_U  0x24
+#define BOX_TRAP_D  0x28
+#define BOX_TRAP_UR 0x25
+#define BOX_TRAP_UC 0x26
+#define BOX_TRAP_UL 0x27
+#define BOX_TRAP_DL 0x28
+#define BOX_TRAP_DC 0x29
+#define BOX_TRAP_DR 0x2a
 /**/
 
 #define NOFIX 0x0
diff --git a/screen.c b/screen.c
index 0ef1f69..cedd6f9 100644
--- a/screen.c
+++ b/screen.c
@@ -39,6 +39,8 @@ char* mode_str(){
 			return "par";
 		case REM:
 			return "rem";
+		case TRP:
+			return "trp";
 		default:
 			return "ERR";
 	}
-- 
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