write function for the new logic-based tetromino shape definitions

src/game/tetromino/shapes.c

@@ -1,7 +1,10 @@
 #include "shapes.h"
 
+#include <string.h>
+
 #include "../../io/colour/colour8.h"
 #include "../../util/types.h"
+#include "../../util/vec.h"
 
 /*                                   0    1    2    3         */
 #define SHAPE_O     ((u16)0x0660) // 0000 0110 0110 0000      the O tetromino with no rotation
@@ -36,10 +39,62 @@
 #define SHAPE_J_180 ((u16)0x6440) // 0110 0100 0100 0000      the J tetromino with a 180° rotation
 #define SHAPE_J_270 ((u16)0x0E20) // 0000 1110 0010 0000      the J tetromino with a 270° rotation
 
+void shape_getblocks(u8 id, i8vec2* restrict out) {
+	struct blockdat {
+		i8vec2 memb[4];
+	};
+	struct blockdat dat;
+	switch (id) {
+	// O tetromino
+	case TETROMINO_O | TETROMINO_ROTATED_0:
+	case TETROMINO_O | TETROMINO_ROTATED_90:
+	case TETROMINO_O | TETROMINO_ROTATED_180:
+	case TETROMINO_O | TETROMINO_ROTATED_270: dat = (struct blockdat){{{1, 1}, {2, 1}, {1, 2}, {2, 2}}}; break;
+
+	// I tetromino
+	case TETROMINO_I | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{0, 1}, {1, 1}, {2, 1}, {3, 1}}}; break;
+	case TETROMINO_I | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{2, 0}, {2, 1}, {2, 2}, {2, 3}}}; break;
+	case TETROMINO_I | TETROMINO_ROTATED_180: dat = (struct blockdat){{{0, 2}, {1, 2}, {2, 2}, {3, 2}}}; break;
+	case TETROMINO_I | TETROMINO_ROTATED_270: dat = (struct blockdat){{{1, 0}, {1, 1}, {1, 2}, {1, 3}}}; break;
+
+	// S tetromino
+	case TETROMINO_S | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{1, 0}, {2, 0}, {0, 1}, {1, 1}}}; break;
+	case TETROMINO_S | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{1, 0}, {1, 1}, {2, 1}, {2, 2}}}; break;
+	case TETROMINO_S | TETROMINO_ROTATED_180: dat = (struct blockdat){{{1, 1}, {2, 1}, {0, 2}, {1, 2}}}; break;
+	case TETROMINO_S | TETROMINO_ROTATED_270: dat = (struct blockdat){{{0, 0}, {0, 1}, {1, 1}, {1, 2}}}; break;
+
+	// Z tetromino
+	case TETROMINO_Z | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{0, 0}, {1, 0}, {1, 1}, {2, 1}}}; break;
+	case TETROMINO_Z | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{2, 0}, {1, 1}, {2, 1}, {1, 2}}}; break;
+	case TETROMINO_Z | TETROMINO_ROTATED_180: dat = (struct blockdat){{{0, 1}, {1, 1}, {1, 2}, {2, 2}}}; break;
+	case TETROMINO_Z | TETROMINO_ROTATED_270: dat = (struct blockdat){{{1, 0}, {0, 1}, {1, 1}, {0, 2}}}; break;
+
+	// T tetromino
+	case TETROMINO_T | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{0, 1}, {1, 1}, {2, 1}, {1, 2}}}; break;
+	case TETROMINO_T | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{1, 0}, {0, 1}, {1, 1}, {1, 2}}}; break;
+	case TETROMINO_T | TETROMINO_ROTATED_180: dat = (struct blockdat){{{1, 0}, {0, 1}, {1, 1}, {2, 1}}}; break;
+	case TETROMINO_T | TETROMINO_ROTATED_270: dat = (struct blockdat){{{1, 0}, {1, 1}, {2, 1}, {1, 2}}}; break;
+
+	// L tetromino
+	case TETROMINO_L | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{1, 0}, {1, 1}, {1, 2}, {2, 2}}}; break;
+	case TETROMINO_L | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{0, 1}, {1, 1}, {2, 1}, {0, 2}}}; break;
+	case TETROMINO_L | TETROMINO_ROTATED_180: dat = (struct blockdat){{{0, 0}, {1, 0}, {1, 1}, {1, 2}}}; break;
+	case TETROMINO_L | TETROMINO_ROTATED_270: dat = (struct blockdat){{{2, 0}, {0, 1}, {1, 1}, {2, 1}}}; break;
+
+	// J tetromino
+	case TETROMINO_J | TETROMINO_ROTATED_0:   dat = (struct blockdat){{{1, 0}, {1, 1}, {0, 2}, {1, 2}}}; break;
+	case TETROMINO_J | TETROMINO_ROTATED_90:  dat = (struct blockdat){{{0, 0}, {0, 1}, {1, 1}, {2, 1}}}; break;
+	case TETROMINO_J | TETROMINO_ROTATED_180: dat = (struct blockdat){{{1, 0}, {2, 0}, {1, 1}, {1, 2}}}; break;
+	case TETROMINO_J | TETROMINO_ROTATED_270: dat = (struct blockdat){{{0, 1}, {1, 1}, {2, 1}, {2, 2}}}; break;
+	}
+
+	memcpy(out, dat.memb, sizeof(i8vec2[4]));
+}
+
 u16 shape_from_id(u8 id) {
 	static u16 const shapes[TETROMINO_COUNT][4] = {
 		// 0°       90°         180°         170°
-		{SHAPE_O, SHAPE_O,    SHAPE_O,     SHAPE_O    },
+		{SHAPE_O, SHAPE_O, SHAPE_O, SHAPE_O},
 		{SHAPE_I, SHAPE_I_90, SHAPE_I_180, SHAPE_I_270},
 		{SHAPE_S, SHAPE_S_90, SHAPE_S_180, SHAPE_S_270},
 		{SHAPE_Z, SHAPE_Z_90, SHAPE_Z_180, SHAPE_Z_270},

src/game/tetromino/shapes.h

@@ -1,9 +1,11 @@
 #pragma once
 #include <stdbool.h>
 #include <stdint.h>
+#include <sys/cdefs.h>
 
 #include "../../io/colour/colour8.h"
 #include "../../util/types.h"
+#include "../../util/vec.h"
 
 enum {
 	TETROMINO_O = 0,
@@ -13,6 +15,7 @@ enum {
 	TETROMINO_T = 4,
 	TETROMINO_L = 5,
 	TETROMINO_J = 6,
+	TETROMINO_ROTATED_0 = 0,
 	TETROMINO_ROTATED_90 = 8,
 	TETROMINO_ROTATED_180 = 16,
 	TETROMINO_ROTATED_270 = 24,
@@ -22,15 +25,14 @@ enum {
 #define SHAPE_HEIGHT    4
 #define TETROMINO_COUNT 7
 
-
+static inline u8 shape_get_row(u16 shape, u8 index) __attribute_deprecated_msg__("switching to a logic-based tetromino storage") {
-
-static inline u8 shape_get_row(u16 shape, u8 index) {
 	return shape >> (((SHAPE_HEIGHT - 1) - index) * SHAPE_WIDTH) & 0xF;
 }
 
-static inline bool shape_is_set(u8 row, u8 index) {
+static inline bool shape_is_set(u8 row, u8 index) __attribute_deprecated_msg__("switching to a logic-based tetromino storage") {
 	return (row >> ((SHAPE_WIDTH - 1) - index) & 1) != 0;
 }
 
-u16 shape_from_id(u8 id);
+void shape_getblocks(u8 id, i8vec2* out);
+u16 shape_from_id(u8 id) __attribute_deprecated_msg__("switching to a logic-based tetromino storage");
 colour8 colour_from_id(u8 id);