427 lines
15 KiB
C
427 lines
15 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <lib/gterm.h>
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#include <lib/misc.h>
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#include <lib/libc.h>
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#include <lib/config.h>
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#include <lib/print.h>
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#include <lib/uri.h>
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#include <lib/fb.h>
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#include <mm/pmm.h>
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#include <term/term.h>
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#include <term/backends/framebuffer.h>
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#include <lib/term.h>
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struct fb_info fbinfo;
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extern symbol _binary_font_bin_start, _binary_font_bin_size;
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static struct image *background;
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static size_t margin = 64;
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static size_t margin_gradient = 4;
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static uint32_t default_bg, default_fg;
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static size_t bg_canvas_size;
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static uint32_t *bg_canvas;
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#define A(rgb) (uint8_t)(rgb >> 24)
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#define R(rgb) (uint8_t)(rgb >> 16)
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#define G(rgb) (uint8_t)(rgb >> 8)
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#define B(rgb) (uint8_t)(rgb)
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#define ARGB(a, r, g, b) (a << 24) | ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF)
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static inline uint32_t colour_blend(uint32_t fg, uint32_t bg) {
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unsigned alpha = 255 - A(fg);
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unsigned inv_alpha = A(fg) + 1;
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uint8_t r = (uint8_t)((alpha * R(fg) + inv_alpha * R(bg)) / 256);
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uint8_t g = (uint8_t)((alpha * G(fg) + inv_alpha * G(bg)) / 256);
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uint8_t b = (uint8_t)((alpha * B(fg) + inv_alpha * B(bg)) / 256);
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return ARGB(0, r, g, b);
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}
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static uint32_t blend_gradient_from_box(size_t x, size_t y, uint32_t bg_px, uint32_t hex) {
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size_t distance, x_distance, y_distance;
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size_t gradient_stop_x = fbinfo.framebuffer_width - margin;
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size_t gradient_stop_y = fbinfo.framebuffer_height - margin;
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if (x < margin)
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x_distance = margin - x;
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else
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x_distance = x - gradient_stop_x;
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if (y < margin)
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y_distance = margin - y;
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else
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y_distance = y - gradient_stop_y;
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if (x >= margin && x < gradient_stop_x) {
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distance = y_distance;
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} else if (y >= margin && y < gradient_stop_y) {
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distance = x_distance;
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} else {
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distance = sqrt((uint64_t)x_distance * (uint64_t)x_distance
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+ (uint64_t)y_distance * (uint64_t)y_distance);
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}
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if (distance > margin_gradient)
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return bg_px;
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uint8_t gradient_step = (0xff - A(hex)) / margin_gradient;
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uint8_t new_alpha = A(hex) + gradient_step * distance;
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return colour_blend((hex & 0xffffff) | (new_alpha << 24), bg_px);
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}
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typedef size_t fixedp6; // the last 6 bits are the fixed point part
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static size_t fixedp6_to_int(fixedp6 value) { return value / 64; }
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static fixedp6 int_to_fixedp6(size_t value) { return value * 64; }
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// Draw rect at coordinates, copying from the image to the fb and canvas, applying fn on every pixel
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__attribute__((always_inline)) static inline void genloop(size_t xstart, size_t xend, size_t ystart, size_t yend, uint32_t (*blend)(size_t x, size_t y, uint32_t orig)) {
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uint8_t *img = background->img;
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const size_t img_width = background->img_width, img_height = background->img_height, img_pitch = background->pitch, colsize = background->bpp / 8;
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switch (background->type) {
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case IMAGE_TILED:
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for (size_t y = ystart; y < yend; y++) {
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size_t image_y = y % img_height, image_x = xstart % img_width;
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const size_t off = img_pitch * (img_height - 1 - image_y);
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size_t canvas_off = fbinfo.framebuffer_width * y;
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for (size_t x = xstart; x < xend; x++) {
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uint32_t img_pixel = *(uint32_t*)(img + image_x * colsize + off);
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uint32_t i = blend(x, y, img_pixel);
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bg_canvas[canvas_off + x] = i;
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if (image_x++ == img_width) image_x = 0; // image_x = x % img_width, but modulo is too expensive
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}
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}
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break;
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case IMAGE_CENTERED:
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for (size_t y = ystart; y < yend; y++) {
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size_t image_y = y - background->y_displacement;
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const size_t off = img_pitch * (img_height - 1 - image_y);
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size_t canvas_off = fbinfo.framebuffer_width * y;
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if (image_y >= background->y_size) { /* external part */
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for (size_t x = xstart; x < xend; x++) {
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uint32_t i = blend(x, y, background->back_colour);
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bg_canvas[canvas_off + x] = i;
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}
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}
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else { /* internal part */
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for (size_t x = xstart; x < xend; x++) {
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size_t image_x = (x - background->x_displacement);
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bool x_external = image_x >= background->x_size;
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uint32_t img_pixel = *(uint32_t*)(img + image_x * colsize + off);
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uint32_t i = blend(x, y, x_external ? background->back_colour : img_pixel);
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bg_canvas[canvas_off + x] = i;
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}
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}
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}
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break;
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// For every pixel, ratio = img_width / gterm_width, img_x = x * ratio, x = (xstart + i)
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// hence x = xstart * ratio + i * ratio
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// so you can set x = xstart * ratio, and increment by ratio at each iteration
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case IMAGE_STRETCHED:
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for (size_t y = ystart; y < yend; y++) {
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size_t img_y = (y * img_height) / fbinfo.framebuffer_height; // calculate Y with full precision
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size_t off = img_pitch * (img_height - 1 - img_y);
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size_t canvas_off = fbinfo.framebuffer_width * y;
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size_t ratio = int_to_fixedp6(img_width) / fbinfo.framebuffer_width;
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fixedp6 img_x = ratio * xstart;
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for (size_t x = xstart; x < xend; x++) {
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uint32_t img_pixel = *(uint32_t*)(img + fixedp6_to_int(img_x) * colsize + off);
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uint32_t i = blend(x, y, img_pixel);
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bg_canvas[canvas_off + x] = i;
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img_x += ratio;
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}
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}
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break;
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}
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}
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static uint32_t blend_external(size_t x, size_t y, uint32_t orig) { (void)x; (void)y; return orig; }
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static uint32_t blend_internal(size_t x, size_t y, uint32_t orig) { (void)x; (void)y; return colour_blend(default_bg, orig); }
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static uint32_t blend_margin(size_t x, size_t y, uint32_t orig) { return blend_gradient_from_box(x, y, orig, default_bg); }
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static void loop_external(size_t xstart, size_t xend, size_t ystart, size_t yend) { genloop(xstart, xend, ystart, yend, blend_external); }
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static void loop_margin(size_t xstart, size_t xend, size_t ystart, size_t yend) { genloop(xstart, xend, ystart, yend, blend_margin); }
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static void loop_internal(size_t xstart, size_t xend, size_t ystart, size_t yend) { genloop(xstart, xend, ystart, yend, blend_internal); }
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static void *generate_canvas(void) {
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if (background) {
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bg_canvas_size = fbinfo.framebuffer_width * fbinfo.framebuffer_height * sizeof(uint32_t);
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bg_canvas = ext_mem_alloc(bg_canvas_size);
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int64_t margin_no_gradient = (int64_t)margin - margin_gradient;
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if (margin_no_gradient < 0) {
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margin_no_gradient = 0;
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}
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size_t scan_stop_x = fbinfo.framebuffer_width - margin_no_gradient;
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size_t scan_stop_y = fbinfo.framebuffer_height - margin_no_gradient;
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loop_external(0, fbinfo.framebuffer_width, 0, margin_no_gradient);
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loop_external(0, fbinfo.framebuffer_width, scan_stop_y, fbinfo.framebuffer_height);
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loop_external(0, margin_no_gradient, margin_no_gradient, scan_stop_y);
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loop_external(scan_stop_x, fbinfo.framebuffer_width, margin_no_gradient, scan_stop_y);
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size_t gradient_stop_x = fbinfo.framebuffer_width - margin;
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size_t gradient_stop_y = fbinfo.framebuffer_height - margin;
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if (margin_gradient) {
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loop_margin(margin_no_gradient, scan_stop_x, margin_no_gradient, margin);
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loop_margin(margin_no_gradient, scan_stop_x, gradient_stop_y, scan_stop_y);
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loop_margin(margin_no_gradient, margin, margin, gradient_stop_y);
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loop_margin(gradient_stop_x, scan_stop_x, margin, gradient_stop_y);
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}
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loop_internal(margin, gradient_stop_x, margin, gradient_stop_y);
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return bg_canvas;
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}
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return NULL;
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}
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static bool last_serial = false;
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static char *last_config = NULL;
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bool gterm_init(char *config, size_t width, size_t height) {
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if (current_video_mode >= 0
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#if defined (BIOS)
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&& current_video_mode != 0x03
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#endif
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&& fbinfo.default_res == true
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&& width == 0
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&& height == 0
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&& fbinfo.framebuffer_bpp == 32
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&& serial == last_serial
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&& config == last_config) {
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term->clear(term, true);
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return true;
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}
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if (current_video_mode >= 0
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#if defined (BIOS)
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&& current_video_mode != 0x03
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#endif
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&& fbinfo.framebuffer_width == width
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&& fbinfo.framebuffer_height == height
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&& fbinfo.framebuffer_bpp == 32
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&& serial == last_serial
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&& config == last_config) {
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term->clear(term, true);
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return true;
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}
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// We force bpp to 32
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if (!fb_init(&fbinfo, width, height, 32))
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return false;
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// Ensure this is xRGB8888, we only support that for the menu
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if (fbinfo.red_mask_size != 8
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|| fbinfo.red_mask_shift != 16
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|| fbinfo.green_mask_size != 8
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|| fbinfo.green_mask_shift != 8
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|| fbinfo.blue_mask_size != 8
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|| fbinfo.blue_mask_shift != 0)
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return false;
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last_serial = serial;
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// default scheme
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margin = 64;
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margin_gradient = 4;
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uint32_t ansi_colours[8];
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ansi_colours[0] = 0x00000000; // black
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ansi_colours[1] = 0x00aa0000; // red
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ansi_colours[2] = 0x0000aa00; // green
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ansi_colours[3] = 0x00aa5500; // brown
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ansi_colours[4] = 0x000000aa; // blue
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ansi_colours[5] = 0x00aa00aa; // magenta
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ansi_colours[6] = 0x0000aaaa; // cyan
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ansi_colours[7] = 0x00aaaaaa; // grey
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char *colours = config_get_value(config, 0, "TERM_PALETTE");
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if (colours != NULL) {
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const char *first = colours;
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size_t i;
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for (i = 0; i < 8; i++) {
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const char *last;
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uint32_t col = strtoui(first, &last, 16);
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if (first == last)
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break;
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ansi_colours[i] = col & 0xffffff;
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if (*last == 0)
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break;
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first = last + 1;
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}
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}
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uint32_t ansi_bright_colours[8];
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ansi_bright_colours[0] = 0x00555555; // black
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ansi_bright_colours[1] = 0x00ff5555; // red
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ansi_bright_colours[2] = 0x0055ff55; // green
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ansi_bright_colours[3] = 0x00ffff55; // brown
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ansi_bright_colours[4] = 0x005555ff; // blue
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ansi_bright_colours[5] = 0x00ff55ff; // magenta
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ansi_bright_colours[6] = 0x0055ffff; // cyan
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ansi_bright_colours[7] = 0x00ffffff; // grey
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char *bright_colours = config_get_value(config, 0, "TERM_PALETTE_BRIGHT");
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if (bright_colours != NULL) {
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const char *first = bright_colours;
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size_t i;
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for (i = 0; i < 8; i++) {
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const char *last;
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uint32_t col = strtoui(first, &last, 16);
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if (first == last)
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break;
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ansi_bright_colours[i] = col & 0xffffff;
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if (*last == 0)
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break;
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first = last + 1;
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}
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}
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default_bg = 0x00000000; // background (black)
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default_fg = 0x00aaaaaa; // foreground (grey)
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char *theme_background = config_get_value(config, 0, "TERM_BACKGROUND");
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if (theme_background != NULL) {
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default_bg = strtoui(theme_background, NULL, 16);
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}
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char *theme_foreground = config_get_value(config, 0, "TERM_FOREGROUND");
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if (theme_foreground != NULL) {
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default_fg = strtoui(theme_foreground, NULL, 16) & 0xffffff;
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}
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background = NULL;
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char *background_path = config_get_value(config, 0, "TERM_WALLPAPER");
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if (background_path != NULL) {
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struct file_handle *bg_file;
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if ((bg_file = uri_open(background_path)) != NULL) {
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background = image_open(bg_file);
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fclose(bg_file);
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}
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}
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if (background == NULL) {
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margin = 0;
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margin_gradient = 0;
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} else {
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if (theme_background == NULL) {
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default_bg = 0x80000000;
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}
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}
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char *theme_margin = config_get_value(config, 0, "TERM_MARGIN");
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if (theme_margin != NULL) {
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margin = strtoui(theme_margin, NULL, 10);
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}
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char *theme_margin_gradient = config_get_value(config, 0, "TERM_MARGIN_GRADIENT");
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if (theme_margin_gradient != NULL) {
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margin_gradient = strtoui(theme_margin_gradient, NULL, 10);
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}
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if (background != NULL) {
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char *background_layout = config_get_value(config, 0, "TERM_WALLPAPER_STYLE");
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if (background_layout != NULL && strcmp(background_layout, "centered") == 0) {
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char *background_colour = config_get_value(config, 0, "TERM_BACKDROP");
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if (background_colour == NULL)
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background_colour = "0";
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uint32_t bg_col = strtoui(background_colour, NULL, 16);
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image_make_centered(background, fbinfo.framebuffer_width, fbinfo.framebuffer_height, bg_col);
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} else if (background_layout != NULL && strcmp(background_layout, "tiled") == 0) {
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} else {
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image_make_stretched(background, fbinfo.framebuffer_width, fbinfo.framebuffer_height);
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}
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}
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size_t font_width = 8;
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size_t font_height = 16;
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size_t font_size = (font_width * font_height * FBTERM_FONT_GLYPHS) / 8;
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#define FONT_MAX 16384
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uint8_t *font = ext_mem_alloc(FONT_MAX);
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memcpy(font, (void *)_binary_font_bin_start, (uintptr_t)_binary_font_bin_size);
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size_t tmp_font_width, tmp_font_height;
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char *menu_font_size = config_get_value(config, 0, "TERM_FONT_SIZE");
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if (menu_font_size != NULL) {
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parse_resolution(&tmp_font_width, &tmp_font_height, NULL, menu_font_size);
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size_t tmp_font_size = (tmp_font_width * tmp_font_height * FBTERM_FONT_GLYPHS) / 8;
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if (tmp_font_size > FONT_MAX) {
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print("Font would be too large (%u bytes, %u bytes allowed). Not loading.\n", tmp_font_size, FONT_MAX);
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goto no_load_font;
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}
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font_size = tmp_font_size;
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}
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char *menu_font = config_get_value(config, 0, "TERM_FONT");
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if (menu_font != NULL) {
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struct file_handle *f;
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if ((f = uri_open(menu_font)) == NULL) {
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print("menu: Could not open font file.\n");
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} else {
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fread(f, font, 0, font_size);
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if (menu_font_size != NULL) {
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font_width = tmp_font_width;
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font_height = tmp_font_height;
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}
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fclose(f);
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}
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}
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no_load_font:;
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size_t font_spacing = 1;
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char *font_spacing_str = config_get_value(config, 0, "TERM_FONT_SPACING");
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if (font_spacing_str != NULL) {
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font_spacing = strtoui(font_spacing_str, NULL, 10);
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}
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size_t font_scale_x = 1;
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size_t font_scale_y = 1;
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char *menu_font_scale = config_get_value(config, 0, "TERM_FONT_SCALE");
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if (menu_font_scale != NULL) {
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parse_resolution(&font_scale_x, &font_scale_y, NULL, menu_font_scale);
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if (font_scale_x > 8 || font_scale_y > 8) {
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font_scale_x = 1;
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font_scale_y = 1;
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}
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}
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uint32_t *canvas = generate_canvas();
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term->deinit(term, pmm_free);
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term = fbterm_init(ext_mem_alloc,
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(void *)(uintptr_t)fbinfo.framebuffer_addr,
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fbinfo.framebuffer_width, fbinfo.framebuffer_height, fbinfo.framebuffer_pitch,
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canvas,
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ansi_colours, ansi_bright_colours,
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&default_bg, &default_fg,
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font, font_width, font_height, font_spacing,
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font_scale_x, font_scale_y,
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margin);
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return true;
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}
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