Merge pull request #260 from christophgysin/scale
implement background scaling
This commit is contained in:
commit
a713686daa
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@ -127,7 +127,7 @@ Commands
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**output** <name> <background|bg> <file> <mode>::
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Sets the wallpaper for the given output to the specified file, using the given
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scaling mode (one of "stretch", "fill", "center", "tile").
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scaling mode (one of "stretch", "fill", "fit", "center", "tile").
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**output** <name> disable::
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Disables the specified output.
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@ -85,6 +85,7 @@ static char *bg_options[] = {
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"stretch",
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"center",
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"fill",
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"fit",
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"tile"
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};
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@ -12,6 +12,14 @@ list_t *surfaces;
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struct registry *registry;
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enum scaling_mode_t {
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SCALING_MODE_STRETCH,
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SCALING_MODE_FILL,
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SCALING_MODE_FIT,
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SCALING_MODE_CENTER,
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SCALING_MODE_TILE,
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};
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void sway_terminate(void) {
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int i;
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for (i = 0; i < surfaces->length; ++i) {
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@ -23,12 +31,12 @@ void sway_terminate(void) {
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exit(1);
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}
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int main(int argc, char **argv) {
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int main(int argc, const char **argv) {
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init_log(L_INFO);
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surfaces = create_list();
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registry = registry_poll();
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if (argc < 4) {
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if (argc != 4) {
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sway_abort("Do not run this program manually. See man 5 sway and look for output options.");
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}
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@ -49,16 +57,93 @@ int main(int argc, char **argv) {
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desktop_shell_set_background(registry->desktop_shell, output->output, window->surface);
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list_add(surfaces, window);
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char *scaling_mode = argv[3];
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cairo_surface_t *image = cairo_image_surface_create_from_png(argv[2]);
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double width = cairo_image_surface_get_width(image);
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double height = cairo_image_surface_get_height(image);
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const char *scaling_mode_str = argv[3];
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enum scaling_mode_t scaling_mode;
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if (strcmp(scaling_mode_str, "stretch") == 0) {
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scaling_mode = SCALING_MODE_STRETCH;
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} else if (strcmp(scaling_mode_str, "fill") == 0) {
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scaling_mode = SCALING_MODE_FILL;
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} else if (strcmp(scaling_mode_str, "fit") == 0) {
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scaling_mode = SCALING_MODE_FIT;
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} else if (strcmp(scaling_mode_str, "center") == 0) {
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scaling_mode = SCALING_MODE_CENTER;
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} else if (strcmp(scaling_mode_str, "tile") == 0) {
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scaling_mode = SCALING_MODE_TILE;
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} else {
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sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
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}
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for (i = 0; i < surfaces->length; ++i) {
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struct window *window = surfaces->items[i];
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if (window_prerender(window) && window->cairo) {
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cairo_scale(window->cairo, window->width / width, window->height / height);
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switch (scaling_mode) {
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case SCALING_MODE_STRETCH:
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cairo_scale(window->cairo,
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(double) window->width / width,
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(double) window->height / height);
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cairo_set_source_surface(window->cairo, image, 0, 0);
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break;
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case SCALING_MODE_FILL:
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{
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double window_ratio = (double) window->width / window->height;
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double bg_ratio = width / height;
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if (window_ratio > bg_ratio) {
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double scale = (double) window->width / width;
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cairo_scale(window->cairo, scale, scale);
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cairo_set_source_surface(window->cairo, image,
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0,
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(double) window->height/2 / scale - height/2);
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} else {
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double scale = (double) window->height / height;
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cairo_scale(window->cairo, scale, scale);
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cairo_set_source_surface(window->cairo, image,
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(double) window->width/2 / scale - width/2,
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0);
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}
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}
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break;
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case SCALING_MODE_FIT:
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{
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double window_ratio = (double) window->width / window->height;
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double bg_ratio = width / height;
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if (window_ratio > bg_ratio) {
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double scale = (double) window->height / height;
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cairo_scale(window->cairo, scale, scale);
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cairo_set_source_surface(window->cairo, image,
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(double) window->width/2 / scale - width/2,
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0);
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} else {
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double scale = (double) window->width / width;
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cairo_scale(window->cairo, scale, scale);
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cairo_set_source_surface(window->cairo, image,
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0,
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(double) window->height/2 / scale - height/2);
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}
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}
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break;
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case SCALING_MODE_CENTER:
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cairo_set_source_surface(window->cairo, image,
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(double) window->width/2 - width/2,
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(double) window->height/2 - height/2);
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break;
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case SCALING_MODE_TILE:
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{
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cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);
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cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
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cairo_set_source(window->cairo, pattern);
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}
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break;
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default:
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sway_abort("Scaling mode '%s' not implemented yet!", scaling_mode_str);
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}
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cairo_paint(window->cairo);
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window_render(window);
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