Flip screenshots
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@ -1,12 +1,25 @@
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_screenshooter.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/util/log.h>
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#include "screenshooter-protocol.h"
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static void copy_bgra_yflip(uint8_t *dst, uint8_t *src, int32_t height,
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int32_t stride) {
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uint8_t *end = dst + height * stride;
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while (dst < end) {
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memcpy(dst, src, stride);
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dst += stride;
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src -= stride;
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}
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}
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struct screenshot_state {
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int32_t width, height, stride;
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uint8_t *pixels;
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struct wl_shm_buffer *shm_buffer;
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struct wlr_output *output;
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struct wlr_screenshot *screenshot;
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@ -14,14 +27,20 @@ struct screenshot_state {
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};
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static void output_frame_notify(struct wl_listener *listener, void *_data) {
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struct screenshot_state *state = wl_container_of(listener, state, frame_listener);
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struct screenshot_state *state = wl_container_of(listener, state,
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frame_listener);
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wlr_output_read_pixels(state->output, state->pixels);
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void *data = wl_shm_buffer_get_data(state->shm_buffer);
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wl_shm_buffer_begin_access(state->shm_buffer);
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wlr_output_read_pixels(state->output, data);
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copy_bgra_yflip(data, state->pixels + state->stride * (state->height - 1),
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state->height, state->stride);
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wl_shm_buffer_end_access(state->shm_buffer);
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free(state->pixels);
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wl_list_remove(&listener->link);
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orbital_screenshot_send_done(state->screenshot->resource);
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// TODO: free(state)
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@ -38,23 +57,36 @@ static void screenshooter_shoot(struct wl_client *client,
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struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get(_buffer);
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int32_t width = wl_shm_buffer_get_width(shm_buffer);
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int32_t height = wl_shm_buffer_get_height(shm_buffer);
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// TODO: int32_t stride = wl_shm_buffer_get_stride(shm_buffer);
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int32_t stride = wl_shm_buffer_get_stride(shm_buffer);
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if (width < output->width || height < output->height) {
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wlr_log(L_ERROR, "Invalid buffer: too small");
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return;
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}
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uint8_t *pixels = malloc(stride * height);
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if (pixels == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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struct wlr_screenshot *screenshot;
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if (!(screenshot = calloc(1, sizeof(struct wlr_screenshot)))) {
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return;
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}
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screenshot->output = _output;
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screenshot->resource = wl_resource_create(client,
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&orbital_screenshot_interface, wl_resource_get_version(_screenshooter), id);
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wlr_log(L_DEBUG, "new screenshot %p (res %p)", screenshot, screenshot->resource);
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wl_resource_set_implementation(screenshot->resource, NULL, screenshot, NULL);
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&orbital_screenshot_interface, wl_resource_get_version(_screenshooter),
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id);
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wlr_log(L_DEBUG, "new screenshot %p (res %p)", screenshot,
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screenshot->resource);
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wl_resource_set_implementation(screenshot->resource, NULL, screenshot,
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NULL);
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struct screenshot_state *state = calloc(1, sizeof(struct screenshot_state));
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state->width = width;
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state->height = height;
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state->stride = stride;
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state->pixels = pixels;
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state->shm_buffer = shm_buffer;
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state->output = output;
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state->screenshot = screenshot;
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@ -71,7 +103,8 @@ static void screenshooter_bind(struct wl_client *wl_client,
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struct wlr_screenshooter *screenshooter = _screenshooter;
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assert(wl_client && screenshooter);
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if (version > 1) {
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wlr_log(L_ERROR, "Client requested unsupported screenshooter version, disconnecting");
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wlr_log(L_ERROR, "Client requested unsupported screenshooter version,"
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"disconnecting");
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wl_client_destroy(wl_client);
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return;
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}
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