diff options
Diffstat (limited to 'src/capture/xcomposite.c')
| -rw-r--r-- | src/capture/xcomposite.c | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/src/capture/xcomposite.c b/src/capture/xcomposite.c new file mode 100644 index 0000000..db41f63 --- /dev/null +++ b/src/capture/xcomposite.c @@ -0,0 +1,338 @@ +#include "../../include/capture/xcomposite.h" +#include "../../include/window_texture.h" +#include "../../include/utils.h" +#include "../../include/cursor.h" +#include "../../include/color_conversion.h" +#include "../../include/window/window.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> + +#include <X11/Xlib.h> + +typedef struct { + gsr_capture_xcomposite_params params; + Display *display; + + bool should_stop; + bool stop_is_error; + bool window_resized; + bool follow_focused_initialized; + bool init_new_window; + + Window window; + vec2i window_size; + vec2i texture_size; + double window_resize_timer; + + WindowTexture window_texture; + + Atom net_active_window_atom; + + gsr_cursor cursor; + + bool clear_background; +} gsr_capture_xcomposite; + +static void gsr_capture_xcomposite_stop(gsr_capture_xcomposite *self) { + window_texture_deinit(&self->window_texture); + gsr_cursor_deinit(&self->cursor); +} + +static int max_int(int a, int b) { + return a > b ? a : b; +} + +static Window get_focused_window(Display *display, Atom net_active_window_atom) { + Atom type; + int format = 0; + unsigned long num_items = 0; + unsigned long bytes_after = 0; + unsigned char *properties = NULL; + if(XGetWindowProperty(display, DefaultRootWindow(display), net_active_window_atom, 0, 1024, False, AnyPropertyType, &type, &format, &num_items, &bytes_after, &properties) == Success && properties) { + Window focused_window = *(unsigned long*)properties; + XFree(properties); + return focused_window; + } + return None; +} + +static int gsr_capture_xcomposite_start(gsr_capture *cap, gsr_capture_metadata *capture_metadata) { + gsr_capture_xcomposite *self = cap->priv; + + if(self->params.follow_focused) { + self->net_active_window_atom = XInternAtom(self->display, "_NET_ACTIVE_WINDOW", False); + if(!self->net_active_window_atom) { + fprintf(stderr, "gsr error: gsr_capture_xcomposite_start failed: failed to get _NET_ACTIVE_WINDOW atom\n"); + return -1; + } + self->window = get_focused_window(self->display, self->net_active_window_atom); + } else { + self->window = self->params.window; + } + + /* TODO: Do these in tick, and allow error if follow_focused */ + + XWindowAttributes attr; + if(!XGetWindowAttributes(self->display, self->window, &attr) && !self->params.follow_focused) { + fprintf(stderr, "gsr error: gsr_capture_xcomposite_start failed: invalid window id: %lu\n", self->window); + return -1; + } + + self->window_size.x = max_int(attr.width, 0); + self->window_size.y = max_int(attr.height, 0); + + if(self->params.follow_focused) + XSelectInput(self->display, DefaultRootWindow(self->display), PropertyChangeMask); + + // TODO: Get select and add these on top of it and then restore at the end. Also do the same in other xcomposite + XSelectInput(self->display, self->window, StructureNotifyMask | ExposureMask); + + if(window_texture_init(&self->window_texture, self->display, self->window, self->params.egl) != 0 && !self->params.follow_focused) { + fprintf(stderr, "gsr error: gsr_capture_xcomposite_start: failed to get window texture for window %ld\n", (long)self->window); + return -1; + } + + if(gsr_cursor_init(&self->cursor, self->params.egl, self->display) != 0) { + gsr_capture_xcomposite_stop(self); + return -1; + } + + self->texture_size.x = 0; + self->texture_size.y = 0; + + self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture)); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y); + self->params.egl->glBindTexture(GL_TEXTURE_2D, 0); + + if(self->params.output_resolution.x == 0 && self->params.output_resolution.y == 0) { + capture_metadata->width = self->texture_size.x; + capture_metadata->height = self->texture_size.y; + } else { + capture_metadata->width = self->params.output_resolution.x; + capture_metadata->height = self->params.output_resolution.y; + } + + self->window_resize_timer = clock_get_monotonic_seconds(); + return 0; +} + +static void gsr_capture_xcomposite_tick(gsr_capture *cap) { + gsr_capture_xcomposite *self = cap->priv; + + if(self->params.follow_focused && !self->follow_focused_initialized) { + self->init_new_window = true; + } + + if(self->init_new_window) { + self->init_new_window = false; + Window focused_window = get_focused_window(self->display, self->net_active_window_atom); + if(focused_window != self->window || !self->follow_focused_initialized) { + self->follow_focused_initialized = true; + XSelectInput(self->display, self->window, 0); + self->window = focused_window; + XSelectInput(self->display, self->window, StructureNotifyMask | ExposureMask); + + XWindowAttributes attr; + attr.width = 0; + attr.height = 0; + if(!XGetWindowAttributes(self->display, self->window, &attr)) + fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick failed: invalid window id: %lu\n", self->window); + + self->window_size.x = max_int(attr.width, 0); + self->window_size.y = max_int(attr.height, 0); + + window_texture_deinit(&self->window_texture); + window_texture_init(&self->window_texture, self->display, self->window, self->params.egl); // TODO: Do not do the below window_texture_on_resize after this + + self->texture_size.x = 0; + self->texture_size.y = 0; + + self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture)); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y); + self->params.egl->glBindTexture(GL_TEXTURE_2D, 0); + + self->window_resized = false; + self->clear_background = true; + } + } + + const double window_resize_timeout = 1.0; // 1 second + if(self->window_resized && clock_get_monotonic_seconds() - self->window_resize_timer >= window_resize_timeout) { + self->window_resized = false; + + if(window_texture_on_resize(&self->window_texture) != 0) { + fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: window_texture_on_resize failed\n"); + //self->should_stop = true; + //self->stop_is_error = true; + return; + } + + self->texture_size.x = 0; + self->texture_size.y = 0; + + self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture)); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x); + self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y); + self->params.egl->glBindTexture(GL_TEXTURE_2D, 0); + + self->clear_background = true; + } +} + +static void gsr_capture_xcomposite_on_event(gsr_capture *cap, gsr_egl *egl) { + gsr_capture_xcomposite *self = cap->priv; + XEvent *xev = gsr_window_get_event_data(egl->window); + switch(xev->type) { + case DestroyNotify: { + /* Window died (when not following focused window), so we stop recording */ + if(!self->params.follow_focused && xev->xdestroywindow.window == self->window) { + self->should_stop = true; + self->stop_is_error = false; + } + break; + } + case Expose: { + /* Requires window texture recreate */ + if(xev->xexpose.count == 0 && xev->xexpose.window == self->window) { + self->window_resize_timer = clock_get_monotonic_seconds(); + self->window_resized = true; + } + break; + } + case ConfigureNotify: { + /* Window resized */ + if(xev->xconfigure.window == self->window && (xev->xconfigure.width != self->window_size.x || xev->xconfigure.height != self->window_size.y)) { + self->window_size.x = max_int(xev->xconfigure.width, 0); + self->window_size.y = max_int(xev->xconfigure.height, 0); + self->window_resize_timer = clock_get_monotonic_seconds(); + self->window_resized = true; + } + break; + } + case PropertyNotify: { + /* Focused window changed */ + if(self->params.follow_focused && xev->xproperty.atom == self->net_active_window_atom) { + self->init_new_window = true; + } + break; + } + } + + gsr_cursor_on_event(&self->cursor, xev); +} + +static bool gsr_capture_xcomposite_should_stop(gsr_capture *cap, bool *err) { + gsr_capture_xcomposite *self = cap->priv; + if(self->should_stop) { + if(err) + *err = self->stop_is_error; + return true; + } + + if(err) + *err = false; + return false; +} + +static int gsr_capture_xcomposite_capture(gsr_capture *cap, gsr_capture_metadata *capture_metdata, gsr_color_conversion *color_conversion) { + gsr_capture_xcomposite *self = cap->priv; + + if(self->clear_background) { + self->clear_background = false; + gsr_color_conversion_clear(color_conversion); + } + + const bool is_scaled = self->params.output_resolution.x > 0 && self->params.output_resolution.y > 0; + vec2i output_size = is_scaled ? self->params.output_resolution : self->texture_size; + output_size = scale_keep_aspect_ratio(self->texture_size, output_size); + + const vec2i target_pos = { max_int(0, capture_metdata->width / 2 - output_size.x / 2), max_int(0, capture_metdata->height / 2 - output_size.y / 2) }; + + //self->params.egl->glFlush(); + //self->params.egl->glFinish(); + + gsr_color_conversion_draw(color_conversion, window_texture_get_opengl_texture_id(&self->window_texture), + target_pos, output_size, + (vec2i){0, 0}, self->texture_size, self->texture_size, + GSR_ROT_0, GSR_SOURCE_COLOR_RGB, false, false); + + if(self->params.record_cursor && self->cursor.visible) { + const vec2d scale = { + self->texture_size.x == 0 ? 0 : (double)output_size.x / (double)self->texture_size.x, + self->texture_size.y == 0 ? 0 : (double)output_size.y / (double)self->texture_size.y + }; + + gsr_cursor_tick(&self->cursor, self->window); + + const vec2i cursor_pos = { + target_pos.x + (self->cursor.position.x - self->cursor.hotspot.x) * scale.x, + target_pos.y + (self->cursor.position.y - self->cursor.hotspot.y) * scale.y + }; + + if(cursor_pos.x < target_pos.x || cursor_pos.x + self->cursor.size.x > target_pos.x + output_size.x || cursor_pos.y < target_pos.y || cursor_pos.y + self->cursor.size.y > target_pos.y + output_size.y) + self->clear_background = true; + + gsr_color_conversion_draw(color_conversion, self->cursor.texture_id, + cursor_pos, (vec2i){self->cursor.size.x * scale.x, self->cursor.size.y * scale.y}, + (vec2i){0, 0}, self->cursor.size, self->cursor.size, + GSR_ROT_0, GSR_SOURCE_COLOR_RGB, false, true); + } + + //self->params.egl->glFlush(); + //self->params.egl->glFinish(); + + return 0; +} + +static uint64_t gsr_capture_xcomposite_get_window_id(gsr_capture *cap) { + gsr_capture_xcomposite *self = cap->priv; + return self->window; +} + +static void gsr_capture_xcomposite_destroy(gsr_capture *cap) { + if(cap->priv) { + gsr_capture_xcomposite_stop(cap->priv); + free(cap->priv); + cap->priv = NULL; + } + free(cap); +} + +gsr_capture* gsr_capture_xcomposite_create(const gsr_capture_xcomposite_params *params) { + if(!params) { + fprintf(stderr, "gsr error: gsr_capture_xcomposite_create params is NULL\n"); + return NULL; + } + + gsr_capture *cap = calloc(1, sizeof(gsr_capture)); + if(!cap) + return NULL; + + gsr_capture_xcomposite *cap_xcomp = calloc(1, sizeof(gsr_capture_xcomposite)); + if(!cap_xcomp) { + free(cap); + return NULL; + } + + cap_xcomp->params = *params; + cap_xcomp->display = gsr_window_get_display(params->egl->window); + + *cap = (gsr_capture) { + .start = gsr_capture_xcomposite_start, + .on_event = gsr_capture_xcomposite_on_event, + .tick = gsr_capture_xcomposite_tick, + .should_stop = gsr_capture_xcomposite_should_stop, + .capture = gsr_capture_xcomposite_capture, + .uses_external_image = NULL, + .get_window_id = gsr_capture_xcomposite_get_window_id, + .destroy = gsr_capture_xcomposite_destroy, + .priv = cap_xcomp + }; + + return cap; +} |