265 lines
12 KiB
C
265 lines
12 KiB
C
#ifndef CHAPTER_5_SOURCE
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#define CHAPTER_5_SOURCE
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#include "chapter_5.h"
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#define BLESSES_FONT_WIDTH (8)
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#define BLESSES_FONT_HEIGHT (8)
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#define BLESSES_FONT_TABULATOR (4)
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#define BLESSES_SIGNAL_COUNT (144)
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static char * blesses_window_title = "xolatile";
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static int blesses_window_width = 1800;
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static int blesses_window_height = 900;
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static int * blesses_sub_framebuffer = NULL;
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static int * blesses_framebuffer = NULL;
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static void (* blesses_action [BLESSES_SIGNAL_COUNT]) (void) = { NULL };
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static xcb_window_t blesses_window = 0;
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static xcb_gcontext_t blesses_context = 0;
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static xcb_pixmap_t blesses_pixmap = 0;
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static xcb_connection_t * blesses_connection = NULL;
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static xcb_screen_t * blesses_screen = NULL;
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static xcb_image_t * blesses_image = NULL;
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static void blesses_initialize (void) {
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unsigned int window_flags [2] = {
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0,
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XCB_EVENT_MASK_NO_EVENT |
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XCB_EVENT_MASK_EXPOSURE |
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XCB_EVENT_MASK_RESIZE_REDIRECT |
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XCB_EVENT_MASK_KEY_RELEASE |
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XCB_EVENT_MASK_KEY_PRESS |
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XCB_EVENT_MASK_BUTTON_RELEASE |
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XCB_EVENT_MASK_BUTTON_PRESS
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};
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unsigned short int window_width = (unsigned short int) blesses_window_width;
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unsigned short int window_height = (unsigned short int) blesses_window_height;
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blesses_connection = xcb_connect (NULL, NULL);
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fatal_failure (blesses_connection == NULL, "blesses : blesses_initialize : XCB connection is null pointer.");
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print ("[/4XCB/-] /0Connected to X11./-\n");
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blesses_screen = xcb_setup_roots_iterator (xcb_get_setup (blesses_connection)).data;
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blesses_window = xcb_generate_id (blesses_connection);
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blesses_context = xcb_generate_id (blesses_connection);
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blesses_pixmap = xcb_generate_id (blesses_connection);
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window_flags [0] = blesses_screen->black_pixel;
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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,
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blesses_screen->root_visual, XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, window_flags);
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xcb_map_window (blesses_connection, blesses_window);
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xcb_change_property (blesses_connection, XCB_PROP_MODE_REPLACE, blesses_window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, (unsigned int) string_length (blesses_window_title), blesses_window_title);
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print ("[/4XCB/-] /0Created window./-\n");
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xcb_create_pixmap (blesses_connection, blesses_screen->root_depth, blesses_pixmap, blesses_window, window_width, window_height);
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print ("[/4XCB/-] /0Created pixmap./-\n");
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xcb_create_gc (blesses_connection, blesses_context, blesses_pixmap, 0, NULL);
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print ("[/4XCB/-] /0Created graphic context./-\n");
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xcb_flush (blesses_connection);
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if (blesses_zoom == TRUE) {
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blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer) / 4);
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} else {
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blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer));
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}
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blesses_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_framebuffer));
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}
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static void blesses_deinitialize (void) {
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blesses_sub_framebuffer = deallocate (blesses_sub_framebuffer);
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blesses_framebuffer = deallocate (blesses_framebuffer);
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xcb_free_gc (blesses_connection, blesses_context);
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print ("[/4XCB/-] /0Deallocated graphic context./-\n");
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xcb_free_pixmap (blesses_connection, blesses_pixmap);
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print ("[/4XCB/-] /0Deallocated pixmap./-\n");
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xcb_destroy_window (blesses_connection, blesses_window);
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print ("[/4XCB/-] /0Deleted window./-\n");
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xcb_disconnect (blesses_connection);
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print ("[/4XCB/-] /0Disconnected from X11./-\n");
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}
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int blesses_active = FALSE;
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int blesses_cursor_x = 0;
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int blesses_cursor_y = 0;
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int blesses_signal = 0;
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int blesses_zoom = TRUE;
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void blesses_configure (void) {
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blesses_active = TRUE;
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blesses_initialize ();
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}
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void blesses_synchronize (void) {
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int i = 0;
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unsigned short int window_width = (unsigned short int) blesses_window_width;
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unsigned short int window_height = (unsigned short int) blesses_window_height;
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xcb_generic_event_t * generic_event = NULL;
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if (blesses_zoom == TRUE) {
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for (i = 0; i != blesses_window_width * blesses_window_height; i++) {
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blesses_framebuffer [i] = blesses_sub_framebuffer [((i / blesses_window_width) / 2) * (blesses_window_width / 2) + (i % blesses_window_width) / 2];
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}
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} else {
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for (i = 0; i != blesses_window_width * blesses_window_height; i++) {
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blesses_framebuffer [i] = blesses_sub_framebuffer [i];
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}
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}
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blesses_sub_framebuffer = deallocate (blesses_sub_framebuffer);
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blesses_image = xcb_image_create_native (blesses_connection, window_width, window_height, XCB_IMAGE_FORMAT_Z_PIXMAP, blesses_screen->root_depth,
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blesses_framebuffer, (unsigned int) (window_width * window_height * (int) sizeof (* blesses_framebuffer)),
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(unsigned char *) blesses_framebuffer);
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xcb_image_put (blesses_connection, blesses_pixmap, blesses_context, blesses_image, 0, 0, 0);
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xcb_image_destroy (blesses_image);
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xcb_copy_area (blesses_connection, blesses_pixmap, blesses_window, blesses_context, 0, 0, 0, 0, window_width, window_height);
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blesses_framebuffer = NULL;
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generic_event = xcb_wait_for_event (blesses_connection);
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switch (generic_event->response_type & 127) {
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case XCB_EXPOSE: {
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xcb_flush (blesses_connection);
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} break;
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case XCB_KEY_PRESS: {
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blesses_signal = (int) ((xcb_key_press_event_t *) generic_event)->detail;
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if (blesses_signal == 24) {
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blesses_active = FALSE;
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}
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if (blesses_signal == 25) {
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blesses_zoom = ! blesses_zoom;
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}
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} break;
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default: {
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} break;
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}
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generic_event = deallocate (generic_event);
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if ((blesses_sub_framebuffer == NULL) && (blesses_framebuffer == NULL)) {
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if (blesses_zoom == TRUE) {
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blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer) / 4);
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} else {
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blesses_sub_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer));
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}
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// blesses_sub_framebuffer = allocate ((blesses_window_width * blesses_window_height * (int) sizeof (* blesses_sub_framebuffer)) / ((blesses_zoom == TRUE) ? 4 : 1));
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blesses_framebuffer = allocate (blesses_window_width * blesses_window_height * (int) sizeof (* blesses_framebuffer));
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}
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if (blesses_active == FALSE) {
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blesses_deinitialize ();
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}
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}
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void blesses_render_background_colour (int background) {
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int x, y;
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for (y = 0; y != blesses_window_height / ((blesses_zoom == TRUE) ? 2 : 1); ++y) {
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for (x = 0; x != blesses_window_width / ((blesses_zoom == TRUE) ? 2 : 1); ++x) {
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blesses_sub_framebuffer [y * (blesses_window_width / ((blesses_zoom == TRUE) ? 2 : 1)) + x] = (int) (0XFF000000 | (unsigned int) background);
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}
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}
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}
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void blesses_render_character (char character, int foreground, int background, int x, int y) {
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const unsigned long int font_code ['~' - ' ' + 2] = {
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0X0000000000000000, 0X00180018183C3C18, 0X0000000000363636, 0X006C6CFE6CFE6C6C, 0X00187ED07C16FC30, 0X0060660C18306606, 0X00DC66B61C36361C, 0X0000000000181818,
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0X0030180C0C0C1830, 0X000C18303030180C, 0X0000187E3C7E1800, 0X000018187E181800, 0X0C18180000000000, 0X000000007E000000, 0X0018180000000000, 0X0000060C18306000,
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0X003C666E7E76663C, 0X007E181818181C18, 0X007E0C183060663C, 0X003C66603860663C, 0X0030307E363C3830, 0X003C6660603E067E, 0X003C66663E060C38, 0X000C0C0C1830607E,
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0X003C66663C66663C, 0X001C30607C66663C, 0X0018180018180000, 0X0C18180018180000, 0X0030180C060C1830, 0X0000007E007E0000, 0X000C18306030180C, 0X001800181830663C,
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0X003C06765676663C, 0X006666667E66663C, 0X003E66663E66663E, 0X003C66060606663C, 0X001E36666666361E, 0X007E06063E06067E, 0X000606063E06067E, 0X003C66667606663C,
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0X006666667E666666, 0X007E18181818187E, 0X001C36303030307C, 0X0066361E0E1E3666, 0X007E060606060606, 0X00C6C6D6D6FEEEC6, 0X006666767E6E6666, 0X003C66666666663C,
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0X000606063E66663E, 0X006C36566666663C, 0X006666363E66663E, 0X003C66603C06663C, 0X001818181818187E, 0X003C666666666666, 0X00183C6666666666, 0X00C6EEFED6D6C6C6,
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0X0066663C183C6666, 0X001818183C666666, 0X007E060C1830607E, 0X003E06060606063E, 0X00006030180C0600, 0X007C60606060607C, 0X000000000000663C, 0XFFFF000000000000,
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0X000000000030180C, 0X007C667C603C0000, 0X003E6666663E0606, 0X003C6606663C0000, 0X007C6666667C6060, 0X003C067E663C0000, 0X000C0C0C3E0C0C38, 0X3C607C66667C0000,
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0X00666666663E0606, 0X003C1818181C0018, 0X0E181818181C0018, 0X0066361E36660606, 0X003C18181818181C, 0X00C6D6D6FE6C0000, 0X00666666663E0000, 0X003C6666663C0000,
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0X06063E66663E0000, 0XE0607C66667C0000, 0X000606066E360000, 0X003E603C067C0000, 0X00380C0C0C3E0C0C, 0X007C666666660000, 0X00183C6666660000, 0X006CFED6D6C60000,
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0X00663C183C660000, 0X3C607C6666660000, 0X007E0C18307E0000, 0X003018180E181830, 0X0018181818181818, 0X000C18187018180C, 0X000000000062D68C, 0X0000000000000000
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};
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int offset;
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if ((x <= -1) || (x >= blesses_window_width / ((blesses_zoom == TRUE) ? 2 : 1) - BLESSES_FONT_WIDTH)) return;
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if ((y <= -1) || (y >= blesses_window_height / ((blesses_zoom == TRUE) ? 2 : 1) - BLESSES_FONT_HEIGHT)) return;
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fatal_failure (blesses_sub_framebuffer == NULL, "blesses : render_character : Sub framebuffer was not allocated.");
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fatal_failure (blesses_framebuffer == NULL, "blesses : render_character : Framebuffer was not allocated.");
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fatal_failure (character_is_invisible (character), "blesses : render_character : Character is not in visible ASCII range.");
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fatal_failure (x <= -1, "blesses : render_character : X position is under lower limit.");
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fatal_failure (y <= -1, "blesses : render_character : Y position is under lower limit.");
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fatal_failure (x >= blesses_window_width - BLESSES_FONT_WIDTH, "blesses : render_character : X position is above upper limit.");
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fatal_failure (y >= blesses_window_height - BLESSES_FONT_HEIGHT, "blesses : render_character : Y position is above upper limit.");
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for (offset = 0; offset != BLESSES_FONT_WIDTH * BLESSES_FONT_HEIGHT; ++offset) {
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int u = offset / BLESSES_FONT_WIDTH + y;
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int v = offset % BLESSES_FONT_WIDTH + x;
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blesses_sub_framebuffer [u * (blesses_window_width / ((blesses_zoom == TRUE) ? 2 : 1)) + v] = ((font_code [(int) (character - ' ')] >> offset) % 2)
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? foreground
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: background;
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}
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}
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void blesses_render_string (char * string, int foreground, int background, int x, int y) {
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blesses_render_string_limit (string, string_length (string), foreground, background, x, y);
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}
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void blesses_render_number (int number, int foreground, int background, int x, int y) {
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blesses_render_string (number_to_string (number), foreground, background, x, y);
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}
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void blesses_render_string_limit (char * string, int limit, int foreground, int background, int x, int y) {
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int offset;
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for (offset = 0; offset != limit; ++offset) {
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if (string [offset] == '\n') {
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x *= 0;
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y += BLESSES_FONT_HEIGHT;
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} else if (string [offset] == '\t') {
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x += BLESSES_FONT_WIDTH * BLESSES_FONT_TABULATOR;
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} else {
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blesses_render_character (string [offset], foreground, background, x, y);
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x += BLESSES_FONT_WIDTH;
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}
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}
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}
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void blesses_render_number_limit (int number, int limit, int foreground, int background, int x, int y) {
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blesses_render_string_limit (number_to_string (number), limit, foreground, background, x, y);
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}
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#endif
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