basic visuals

CMakeLists.txt

@@ -5,7 +5,8 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(GTK4 REQUIRED IMPORTED_TARGET gtk4)
+pkg_check_modules(LIBRSVG REQUIRED IMPORTED_TARGET librsvg-2.0)
 
 add_executable(${PROJECT_NAME} ${SOURCES})
 set_property(TARGET ${PROJECT_NAME} PROPERTY C_STANDARD 99)
-target_link_libraries(${PROJECT_NAME} PRIVATE PkgConfig::GTK4)
+target_link_libraries(${PROJECT_NAME} PRIVATE PkgConfig::GTK4 PkgConfig::LIBRSVG)

src/main.c

@@ -1,31 +1,100 @@
 #include <gtk/gtk.h>
 #include <cairo.h>
-#include <stdbool.h>
+#include <librsvg/rsvg.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define BOARD_SIZE 8
+#define LENGTH(array) (sizeof array / sizeof *array)
+
+enum pieces {
+	KING,
+	QUEEN,
+	ROOK,
+	BISHOP,
+	KNIGHT,
+	PAWN
+};
+
+enum playerColor {
+	BLACK,
+	WHITE
+};
+
+#define WHITE_PIECE 8
+
+typedef uint_least8_t piece_t;
+
+struct drawData_t {
+	RsvgHandle **piecesSvg;
+	piece_t *chessboard;
+};
 
 static void draw_event(GtkDrawingArea *area, cairo_t *cr, int width, int height, gpointer data) {
-	const double fieldSize = (double)(width < height ? width : height) / 8;
-	const double xOffset = (width - fieldSize * 8) / 2;
-	const double yOffset = (height - fieldSize * 8) / 2;
+	const double fieldSize = (double)(width < height ? width : height) / BOARD_SIZE;
+	const double xOffset = (width - fieldSize * BOARD_SIZE) / 2;
+	const double yOffset = (height - fieldSize * BOARD_SIZE) / 2;
+	const struct drawData_t drawData = *(struct drawData_t*)data;
+	const piece_t *chessboard = drawData.chessboard;
+	RsvgHandle **piecesSvg = drawData.piecesSvg;
 	for(int x = 0; x < 8; ++x) {
 		for(int y = 0; y < 8; ++y) {
 			cairo_rectangle(cr, xOffset +  x * fieldSize, yOffset + y * fieldSize, fieldSize, fieldSize);
 			if((x + y) & 1) cairo_set_source_rgb(cr, 0.46274, 0.5882, 0.3373);
 			else cairo_set_source_rgb(cr, 0.9333, 0.9333, 0.8235);
 			cairo_fill(cr);
+			const RsvgRectangle rect = {xOffset +  x * fieldSize, yOffset + y * fieldSize, fieldSize, fieldSize};
+			rsvg_handle_render_document(piecesSvg[0], cr, &rect, NULL);
 		}
 	}
 }
 
-static void app_activate(GApplication *app, gpointer user_data) {
-	GtkWindow *win;
-	GtkWidget *drawArea;
+static void on_click(GtkGestureClick *gesture, int n_press, double x, double y, gpointer data) {
+    g_print("Mouse clicked at (%f, %f)\n", x, y);
+}
 
-	win = GTK_WINDOW(gtk_window_new());
-	drawArea = gtk_drawing_area_new();
-	gtk_window_set_child(win, drawArea);
-	gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(drawArea), draw_event, NULL, NULL);
-	gtk_window_set_application(win, GTK_APPLICATION(app));
-	gtk_window_present(win);
+static void app_activate(GApplication *app, gpointer data) {
+	GtkWindow *window = GTK_WINDOW(gtk_window_new());
+	static RsvgHandle *piecesSvg[16];
+	static piece_t chessboard[BOARD_SIZE * BOARD_SIZE];
+	static struct drawData_t drawData = {piecesSvg, chessboard};
+	{
+		GtkWidget *drawArea = gtk_drawing_area_new();
+		gtk_window_set_child(window, drawArea);
+		gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(drawArea), draw_event, &drawData, NULL);
+	}
+	{
+		GtkGesture *gesture = gtk_gesture_click_new();
+		g_signal_connect(gesture, "pressed", G_CALLBACK(on_click), NULL);
+		gtk_widget_add_controller(GTK_WIDGET(window), GTK_EVENT_CONTROLLER(gesture));
+	}
+	{
+		const char *const piecesFilenames[] = {
+			"king",
+			"queen",
+			"rook",
+			"bishop",
+			"knight",
+			"pawn"
+		};
+		for(uint i = 0; i < LENGTH(piecesFilenames); ++i) {
+			const char *const color[] = {"black", "white"};
+			for(uint j = 0; j < LENGTH(color); ++j) {
+				char filename[25];
+				GError *error = NULL;
+				sprintf(filename, "pieces/%s_%s.svg", color[j], piecesFilenames[i]);
+				piecesSvg[i | j ? WHITE_PIECE : 0] = rsvg_handle_new_from_file(filename, &error);
+				if(error != NULL) {
+					perror(error->message);
+					g_clear_error(&error);
+					exit(1);
+				}
+			}
+		}
+	}
+	gtk_window_set_application(window, GTK_APPLICATION(app));
+	gtk_window_present(window);
 }
 
 int main(int argc, char **argv) {