Skeleton for chapter 5, XCB library...

chapter/chapter_2.c

@@ -527,7 +527,7 @@ int curses_render_string_limit (char * string, int limit, int colour, int effect
 
 	for (offset = 0; offset != limit; ++offset) {
 		if (string [offset] == '\n') {
-			x  = 0;
+			x *= 0;
 			y += 1;
 		} else if (string [offset] == '\t') {
 			x += 8;

chapter/chapter_5.c

@@ -11,4 +11,213 @@ It is distributed in the hope that it will be useful or harmful, it really depen
 
 #include "chapter_5.h"
 
+#define BLESSES_FONT_WIDTH  (8)
+#define BLESSES_FONT_HEIGHT (8)
+
+#define BLESSES_FONT_TABULATOR (4)
+
+char * blesses_window_title    = "xolatile";
+int    blesses_window_width    = 1800;
+int    blesses_window_height   = 900;
+int    blesses_active          = 1;
+int    blesses_cursor_x        = 0;
+int    blesses_cursor_y        = 0;
+int    blesses_signal          = 0;
+int  * blesses_sub_framebuffer = NULL;
+int  * blesses_framebuffer     = NULL;
+
+void (* blesses_action [BLESSES_SIGNAL_COUNT]) (void) = { NULL };
+
+xcb_window_t          blesses_window     = 0;
+xcb_gcontext_t        blesses_context    = 0;
+xcb_pixmap_t          blesses_pixmap     = 0;
+xcb_connection_t    * blesses_connection = NULL;
+xcb_screen_t        * blesses_screen     = NULL;
+xcb_image_t         * blesses_image      = NULL;
+
+void blesses_initialize (void) {
+	unsigned int window_flags [2] = {
+		0,
+		XCB_EVENT_MASK_NO_EVENT        |
+		XCB_EVENT_MASK_EXPOSURE        |
+		XCB_EVENT_MASK_RESIZE_REDIRECT |
+		XCB_EVENT_MASK_KEY_RELEASE     |
+		XCB_EVENT_MASK_KEY_PRESS       |
+		XCB_EVENT_MASK_BUTTON_RELEASE  |
+		XCB_EVENT_MASK_BUTTON_PRESS
+	};
+
+	unsigned short int window_width  = (unsigned short int) blesses_window_width;
+	unsigned short int window_height = (unsigned short int) blesses_window_height;
+
+	blesses_connection = xcb_connect (NULL, NULL);
+
+	fatal_failure (blesses_connection == NULL, "blesses : blesses_initialize : XCB connection is null pointer.");
+
+	blesses_screen = xcb_setup_roots_iterator (xcb_get_setup (blesses_connection)).data;
+
+	blesses_window  = xcb_generate_id (blesses_connection);
+	blesses_context = xcb_generate_id (blesses_connection);
+	blesses_pixmap  = xcb_generate_id (blesses_connection);
+
+	window_flags [0] = blesses_screen->black_pixel;
+
+	xcb_create_window (blesses_connection, blesses_screen->root_depth, blesses_window, blesses_screen->root, 0, 0, window_width, window_height, 10, XCB_WINDOW_CLASS_INPUT_OUTPUT,
+	                   blesses_screen->root_visual, XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, window_flags);
+
+	xcb_map_window (blesses_connection, blesses_window);
+
+	xcb_change_property (blesses_connection, XCB_PROP_MODE_REPLACE, blesses_window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, string_length (blesses_window_title), blesses_window_title);
+
+	xcb_create_pixmap (blesses_connection, blesses_screen->root_depth, blesses_pixmap, blesses_window, window_width, window_height);
+
+	xcb_create_gc (blesses_connection, blesses_context, blesses_pixmap, 0, NULL);
+
+	xcb_flush (blesses_connection);
+
+	/*blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer) / 4);*/
+	blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer));
+	blesses_framebuffer     = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_framebuffer));
+}
+
+void blesses_deinitialize (void) {
+	blesses_sub_framebuffer = deallocate (blesses_sub_framebuffer);
+	blesses_framebuffer     = deallocate (blesses_framebuffer);
+
+	xcb_free_gc (blesses_connection, blesses_context);
+
+	xcb_free_pixmap (blesses_connection, blesses_pixmap);
+
+	xcb_destroy_window (blesses_connection, blesses_window);
+
+	xcb_disconnect (blesses_connection);
+}
+
+void blesses_synchronize (void) {
+	int i = 0;
+
+	xcb_generic_event_t * generic_event = NULL;
+/*
+	for (i = 0; i != blesses_window_width * blesses_window_height; i++) {
+		blesses_framebuffer [i] = blesses_sub_framebuffer [((i / blesses_window_width) / 2) * (blesses_window_width / 2) + (i % blesses_window_width) / 2];
+	}
+*/
+	for (i = 0; i != blesses_window_width * blesses_window_height; i++) {
+		blesses_framebuffer [i] = blesses_sub_framebuffer [i];
+	}
+
+	blesses_sub_framebuffer = deallocate (blesses_sub_framebuffer);
+
+	blesses_image = xcb_image_create_native (blesses_connection, blesses_window_width, blesses_window_height, XCB_IMAGE_FORMAT_Z_PIXMAP, blesses_screen->root_depth,
+	                                         blesses_framebuffer, (unsigned int) (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_framebuffer)),
+	                                         (unsigned char *) blesses_framebuffer);
+
+	xcb_image_put (blesses_connection, blesses_pixmap, blesses_context, blesses_image, 0, 0, 0);
+
+	xcb_image_destroy (blesses_image);
+
+	xcb_copy_area (blesses_connection, blesses_pixmap, blesses_window, blesses_context, 0, 0, 0, 0, blesses_window_width, blesses_window_height);
+
+	blesses_framebuffer = NULL;
+
+	generic_event = xcb_wait_for_event (blesses_connection);
+
+	switch (generic_event->response_type & 127) {
+		case XCB_EXPOSE: {
+			xcb_flush (blesses_connection);
+		} break;
+		case XCB_KEY_PRESS: {
+			blesses_signal = (int) ((xcb_key_press_event_t *) generic_event)->detail;
+			if (blesses_signal == 24) {
+				blesses_active = 0;
+			}
+		} break;
+		default: {
+		} break;
+	}
+
+	generic_event = deallocate (generic_event);
+
+	if ((blesses_sub_framebuffer == NULL) && (blesses_framebuffer == NULL)) {
+		/*blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer) / 4);*/
+		blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer));
+		blesses_framebuffer     = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_framebuffer));
+	}
+}
+
+void blesses_render_background_colour (int background) {
+	int x, y;
+
+	for (y = 0; y != blesses_window_height/* / 2*/; ++y) {
+		for (x = 0; x != blesses_window_width/* / 2*/; ++x) {
+			blesses_sub_framebuffer [y * (blesses_window_width/* / 2*/) + x] = 0XFF000000 | colour;
+		}
+	}
+}
+
+void blesses_render_character (char character, int foreground, int background, int x, int y) {
+	const unsigned long int font_code ['~' - ' ' + 2] = {
+		0X0000000000000000, 0X00180018183C3C18, 0X0000000000363636, 0X006C6CFE6CFE6C6C, 0X00187ED07C16FC30, 0X0060660C18306606, 0X00DC66B61C36361C, 0X0000000000181818,
+		0X0030180C0C0C1830, 0X000C18303030180C, 0X0000187E3C7E1800, 0X000018187E181800, 0X0C18180000000000, 0X000000007E000000, 0X0018180000000000, 0X0000060C18306000,
+		0X003C666E7E76663C, 0X007E181818181C18, 0X007E0C183060663C, 0X003C66603860663C, 0X0030307E363C3830, 0X003C6660603E067E, 0X003C66663E060C38, 0X000C0C0C1830607E,
+		0X003C66663C66663C, 0X001C30607C66663C, 0X0018180018180000, 0X0C18180018180000, 0X0030180C060C1830, 0X0000007E007E0000, 0X000C18306030180C, 0X001800181830663C,
+		0X003C06765676663C, 0X006666667E66663C, 0X003E66663E66663E, 0X003C66060606663C, 0X001E36666666361E, 0X007E06063E06067E, 0X000606063E06067E, 0X003C66667606663C,
+		0X006666667E666666, 0X007E18181818187E, 0X001C36303030307C, 0X0066361E0E1E3666, 0X007E060606060606, 0X00C6C6D6D6FEEEC6, 0X006666767E6E6666, 0X003C66666666663C,
+		0X000606063E66663E, 0X006C36566666663C, 0X006666363E66663E, 0X003C66603C06663C, 0X001818181818187E, 0X003C666666666666, 0X00183C6666666666, 0X00C6EEFED6D6C6C6,
+		0X0066663C183C6666, 0X001818183C666666, 0X007E060C1830607E, 0X003E06060606063E, 0X00006030180C0600, 0X007C60606060607C, 0X000000000000663C, 0XFFFF000000000000,
+		0X000000000030180C, 0X007C667C603C0000, 0X003E6666663E0606, 0X003C6606663C0000, 0X007C6666667C6060, 0X003C067E663C0000, 0X000C0C0C3E0C0C38, 0X3C607C66667C0000,
+		0X00666666663E0606, 0X003C1818181C0018, 0X0E181818181C0018, 0X0066361E36660606, 0X003C18181818181C, 0X00C6D6D6FE6C0000, 0X00666666663E0000, 0X003C6666663C0000,
+		0X06063E66663E0000, 0XE0607C66667C0000, 0X000606066E360000, 0X003E603C067C0000, 0X00380C0C0C3E0C0C, 0X007C666666660000, 0X00183C6666660000, 0X006CFED6D6C60000,
+		0X00663C183C660000, 0X3C607C6666660000, 0X007E0C18307E0000, 0X003018180E181830, 0X0018181818181818, 0X000C18187018180C, 0X000000000062D68C, 0X0000000000000000
+	};
+
+	int offset;
+
+	if ((x <= -1) || (x >= blesses_window_width/*  / 2*/ - BLESSES_FONT_WIDTH))  return;
+	if ((y <= -1) || (y >= blesses_window_height/* / 2*/ - BLESSES_FONT_HEIGHT)) return;
+
+	fatal_failure (blesses_sub_framebuffer == NULL,                  "blesses : render_character : Sub framebuffer was not allocated.");
+	fatal_failure (blesses_framebuffer     == NULL,                  "blesses : render_character : Framebuffer was not allocated.");
+	fatal_failure (character_is_invisible (character),               "blesses : render_character : Character is not in visible ASCII range.");
+	fatal_failure (x <= -1,                                          "blesses : render_character : X position is under lower limit.");
+	fatal_failure (y <= -1,                                          "blesses : render_character : Y position is under lower limit.");
+	fatal_failure (x >= blesses_window_width  - BLESSES_FONT_WIDTH,  "blesses : render_character : X position is above upper limit.");
+	fatal_failure (y >= blesses_window_height - BLESSES_FONT_HEIGHT, "blesses : render_character : Y position is above upper limit.");
+
+	for (offset = 0; offset != BLESSES_FONT_WIDTH * BLESSES_FONT_HEIGHT; ++offset) {
+		int u = offset / BLESSES_FONT_WIDTH + y;
+		int v = offset % BLESSES_FONT_WIDTH + x;
+
+		blesses_sub_framebuffer [u * (blesses_window_width/* / 2*/) + v] = ((font_code [(int) (character - ' ')] >> offset) % 2) ? foreground : background;
+	}
+}
+
+void blesses_render_string (char * string, int foreground, int background, int x, int y) {
+	blesses_render_string_limit (string, string_length (string), foreground, background, x, y);
+}
+
+void blesses_render_number (int number, int foreground, int background, int x, int y) {
+	blesses_render_string (number_to_string (number), foreground, background, x, y);
+}
+
+void blesses_render_string_limit (char * string, int limit, int foreground, int background, int x, int y) {
+	int offset;
+
+	for (offset = 0; offset != limit; ++offset) {
+		if (string [offset] == '\n') {
+			x *= 0;
+			y += BLESSES_FONT_HEIGHT;
+		} else if (string [offset] == '\t') {
+			x += BLESSES_FONT_WIDTH * BLESSES_FONT_TABULATOR;
+		} else {
+			blesses_render_character (string [offset], foreground, background, x, y);
+			x += BLESSES_FONT_WIDTH;
+		}
+	}
+}
+
+void blesses_render_number_limit (int number, int limit, int foreground, int background, int x, int y) {
+	blesses_render_string_limit (number_to_string (number), limit, foreground, background, x, y);
+}
+
 #endif

chapter/chapter_5.h

@@ -9,10 +9,48 @@ It is distributed in the hope that it will be useful or harmful, it really depen
 #ifndef CHAPTER_5_HEADER
 #define CHAPTER_5_HEADER
 
+#include <xcb/xcb.h>
+#include <xcb/xcb_atom.h>
+#include <xcb/xcb_image.h>
+
 #include "chapter_0.h"
 #include "chapter_1.h"
 #include "chapter_2.h"
 #include "chapter_3.h"
 #include "chapter_4.h"
 
+#define BLESSES_SIGNAL_COUNT (144)
+
+extern char * blesses_window_title;
+extern int    blesses_window_width;
+extern int    blesses_window_height;
+extern int    blesses_active;
+extern int    blesses_cursor_x;
+extern int    blesses_cursor_y;
+extern int    blesses_signal;
+extern int  * blesses_sub_framebuffer;
+extern int  * blesses_framebuffer;
+
+extern void (* blesses_action [BLESSES_SIGNAL_COUNT]) (void);
+
+extern xcb_window_t          blesses_window;
+extern xcb_gcontext_t        blesses_context;
+extern xcb_pixmap_t          blesses_pixmap;
+extern xcb_connection_t    * blesses_connection;
+extern xcb_screen_t        * blesses_screen;
+extern xcb_image_t         * blesses_image;
+
+extern void blesses_initialize   (void);
+extern void blesses_deinitialize (void);
+extern void blesses_synchronize  (void);
+
+extern void blesses_render_background_colour (int background);
+
+extern void blesses_render_character (char character, int foreground, int background, int x, int y);
+
+extern void blesses_render_string       (char * string,            int foreground, int background, int x, int y);
+extern void blesses_render_number       (int    number,            int foreground, int background, int x, int y);
+extern void blesses_render_string_limit (char * string, int limit, int foreground, int background, int x, int y);
+extern void blesses_render_number_limit (int    number, int limit, int foreground, int background, int x, int y);
+
 #endif

compile.sh

@@ -9,12 +9,12 @@ gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_1.o chapter/chapter_1.
 gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_2.o chapter/chapter_2.c
 gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_3.o chapter/chapter_3.c
 gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_4.o chapter/chapter_4.c
-gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_5.o chapter/chapter_5.c
-gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_6.o chapter/chapter_6.c
+#~gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_5.o chapter/chapter_5.c
+#~gcc -g -Wall -Wextra -Wpedantic -O0 -c -o chapter/chapter_6.o chapter/chapter_6.c
 
 gcc -g -Wall -Wextra -Wpedantic -O0 -c -o xhartae.o xhartae.c
 
-gcc -o xhartae xhartae.o chapter/chapter_0.o chapter/chapter_1.o chapter/chapter_2.o chapter/chapter_3.o chapter/chapter_4.o chapter/chapter_5.o chapter/chapter_6.o
+gcc -o xhartae xhartae.o chapter/chapter_0.o chapter/chapter_1.o chapter/chapter_2.o chapter/chapter_3.o chapter/chapter_4.o #chapter/chapter_5.o chapter/chapter_6.o
 
 gcc -g -Wall -Wextra -Wpedantic -Werror -O0 -o program/program_0 program/program_0.c
 gcc -g -Wall -Wextra -Wpedantic -Werror -O0 -o program/program_1 program/program_1.c

xhartae.c

@@ -12,16 +12,16 @@ It is distributed in the hope that it will be useful or harmful, it really depen
 	#include "chapter/chapter_2.c"
 	#include "chapter/chapter_3.c"
 	#include "chapter/chapter_4.c"
-	#include "chapter/chapter_5.c"
-	#include "chapter/chapter_6.c"
+	//~#include "chapter/chapter_5.c"
+	//~#include "chapter/chapter_6.c"
 #else
 	#include "chapter/chapter_0.h"
 	#include "chapter/chapter_1.h"
 	#include "chapter/chapter_2.h"
 	#include "chapter/chapter_3.h"
 	#include "chapter/chapter_4.h"
-	#include "chapter/chapter_5.h"
-	#include "chapter/chapter_6.h"
+	//~#include "chapter/chapter_5.h"
+	//~#include "chapter/chapter_6.h"
 #endif
 
 /*