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Merge pull request #1713 from emersion/swaybg-hidpi

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swaybg: add HiDPI support
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Drew DeVault 2018-04-03 17:02:32 -04:00 • committed by GitHub
commit 843e16847b
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1 changed files with 56 additions and 19 deletions
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75
swaybg/main.c
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@ -47,6 +47,7 @@ struct swaybg_state {
bool run_display;
uint32_t width, height;
int32_t scale;
struct pool_buffer buffers[2];
struct pool_buffer *current_buffer;
};
@ -74,52 +75,53 @@ static void render_image(struct swaybg_state *state) {
cairo_surface_t *image = state->context.image;
double width = cairo_image_surface_get_width(image);
double height = cairo_image_surface_get_height(image);
int wwidth = state->width;
int wheight = state->height;
int buffer_width = state->width * state->scale;
int buffer_height = state->height * state->scale;
switch (state->args->mode) {
case BACKGROUND_MODE_STRETCH:
cairo_scale(cairo, (double)wwidth / width, (double)wheight / height);
cairo_scale(cairo, (double)buffer_width / width,
(double)buffer_height / height);
cairo_set_source_surface(cairo, image, 0, 0);
break;
case BACKGROUND_MODE_FILL: {
double window_ratio = (double)wwidth / wheight;
double window_ratio = (double)buffer_width / buffer_height;
double bg_ratio = width / height;
if (window_ratio > bg_ratio) {
double scale = (double)wwidth / width;
double scale = (double)buffer_width / width;
cairo_scale(cairo, scale, scale);
cairo_set_source_surface(cairo, image,
0, (double)wheight / 2 / scale - height / 2);
0, (double)buffer_height / 2 / scale - height / 2);
} else {
double scale = (double)wheight / height;
double scale = (double)buffer_height / height;
cairo_scale(cairo, scale, scale);
cairo_set_source_surface(cairo, image,
(double)wwidth / 2 / scale - width / 2, 0);
(double)buffer_width / 2 / scale - width / 2, 0);
}
break;
}
case BACKGROUND_MODE_FIT: {
double window_ratio = (double)wwidth / wheight;
double window_ratio = (double)buffer_width / buffer_height;
double bg_ratio = width / height;
if (window_ratio > bg_ratio) {
double scale = (double)wheight / height;
double scale = (double)buffer_height / height;
cairo_scale(cairo, scale, scale);
cairo_set_source_surface(cairo, image,
(double)wwidth / 2 / scale - width / 2, 0);
(double)buffer_width / 2 / scale - width / 2, 0);
} else {
double scale = (double)wwidth / width;
double scale = (double)buffer_width / width;
cairo_scale(cairo, scale, scale);
cairo_set_source_surface(cairo, image,
0, (double)wheight / 2 / scale - height / 2);
0, (double)buffer_height / 2 / scale - height / 2);
}
break;
}
case BACKGROUND_MODE_CENTER:
cairo_set_source_surface(cairo, image,
(double)wwidth / 2 - width / 2,
(double)wheight / 2 - height / 2);
(double)buffer_width / 2 - width / 2,
(double)buffer_height / 2 - height / 2);
break;
case BACKGROUND_MODE_TILE: {
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);
@ -135,8 +137,8 @@ static void render_image(struct swaybg_state *state) {
}
static void render_frame(struct swaybg_state *state) {
state->current_buffer = get_next_buffer(state->shm,
state->buffers, state->width, state->height);
state->current_buffer = get_next_buffer(state->shm, state->buffers,
state->width * state->scale, state->height * state->scale);
cairo_t *cairo = state->current_buffer->cairo;
switch (state->args->mode) {
@ -149,6 +151,7 @@ static void render_frame(struct swaybg_state *state) {
break;
}
wl_surface_set_buffer_scale(state->surface, state->scale);
wl_surface_attach(state->surface, state->current_buffer->buffer, 0, 0);
wl_surface_damage(state->surface, 0, 0, state->width, state->height);
wl_surface_commit(state->surface);
@ -212,12 +215,42 @@ struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.closed = layer_surface_closed,
};
static void output_geometry(void *data, struct wl_output *output, int32_t x,
int32_t y, int32_t width_mm, int32_t height_mm, int32_t subpixel,
const char *make, const char *model, int32_t transform) {
// Who cares
}
static void output_mode(void *data, struct wl_output *output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh) {
// Who cares
}
static void output_done(void *data, struct wl_output *output) {
// Who cares
}
static void output_scale(void *data, struct wl_output *output, int32_t factor) {
struct swaybg_state *state = data;
state->scale = factor;
if (state->run_display) {
render_frame(state);
}
}
struct wl_output_listener output_listener = {
.geometry = output_geometry,
.mode = output_mode,
.done = output_done,
.scale = output_scale,
};
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct swaybg_state *state = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
state->compositor = wl_registry_bind(registry, name,
&wl_compositor_interface, 1);
&wl_compositor_interface, 3);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
state->shm = wl_registry_bind(registry, name,
&wl_shm_interface, 1);
@ -225,7 +258,8 @@ static void handle_global(void *data, struct wl_registry *registry,
static int output_idx = 0;
if (output_idx == state->args->output_idx) {
state->output = wl_registry_bind(registry, name,
&wl_output_interface, 1);
&wl_output_interface, 3);
wl_output_add_listener(state->output, &output_listener, state);
}
output_idx++;
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
@ -287,6 +321,9 @@ int main(int argc, const char **argv) {
wl_display_roundtrip(state.display);
assert(state.compositor && state.layer_shell && state.output && state.shm);
// Second roundtrip to get output properties
wl_display_roundtrip(state.display);
assert(state.surface = wl_compositor_create_surface(state.compositor));
state.layer_surface = zwlr_layer_shell_v1_get_layer_surface(