chroma

public

Lightweight wallpaper daemon for Wayland

clone

ssh://git@git.notashelf.dev:33/notashelf/chroma.git

#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>

#include "../include/chroma.h"

// Global logging level (using CHROMA_LOG_* constants)
static int log_level = CHROMA_LOG_WARN; // Default to WARN and ERROR only

// Initialize chroma state
int chroma_init(chroma_state_t *state) {
  if (!state) {
    return CHROMA_ERROR_INIT;
  }

  // Initialize all fields to zero
  memset(state, 0, sizeof(chroma_state_t));

  // Set initial state
  state->running = false;
  state->initialized = false;
  state->egl_display = EGL_NO_DISPLAY;
  state->egl_context = EGL_NO_CONTEXT;

  // Initialize stb_image
  chroma_image_init_stb();

  state->initialized = true;
  chroma_log("INFO", "Chroma state initialized");
  chroma_log_resource_allocation("chroma_state", sizeof(chroma_state_t),
                                 "main application state");

  return CHROMA_OK;
}

// Cleanup chroma state
void chroma_cleanup(chroma_state_t *state) {
  if (!state || !state->initialized) {
    return;
  }

  chroma_log("INFO", "Cleaning up chroma state");
  chroma_log_memory_stats("pre-cleanup");

  // Stop the main loop
  state->running = false;

  // Clean up all images
  chroma_images_cleanup(state);

  // Clean up EGL
  chroma_egl_cleanup(state);

  // Clean up Wayland
  chroma_wayland_disconnect(state);

  // Clean up configuration
  chroma_config_free(&state->config);

  state->initialized = false;
  chroma_log_resource_deallocation("chroma_state", sizeof(chroma_state_t),
                                   "main application state");
  chroma_log("INFO", "Chroma cleanup complete");
}

// Assign wallpaper to an output
static int assign_wallpaper_to_output(chroma_state_t *state,
                                      chroma_output_t *output) {
  if (!state || !output || !output->active) {
    return CHROMA_ERROR_INIT;
  }

  // Get image path for this output
  const char *image_path = chroma_config_get_image_for_output(
      &state->config, output->name ? output->name : "unknown");
  if (!image_path) {
    chroma_log("WARN", "No wallpaper configured for output %u (%s)", output->id,
               output->name ? output->name : "unknown");
    return CHROMA_ERROR_CONFIG;
  }

  // Load or get cached image
  chroma_image_t *image = chroma_image_get_or_load(state, image_path);
  if (!image) {
    chroma_log("ERROR", "Failed to load image for output %u: %s", output->id,
               image_path);
    return CHROMA_ERROR_IMAGE;
  }

  // Check if image changed and invalidate texture cache if neceessary
  bool image_changed = (output->image != image);
  if (image_changed && output->image) {
    chroma_output_invalidate_texture(output);
    chroma_log("DEBUG", "Image changed for output %u, invalidated texture",
               output->id);
  }

  // Assign image to output
  output->image = image;

  // Create surface if it doesn't exist
  if (!output->surface) {
    int ret = chroma_surface_create(state, output);
    if (ret != CHROMA_OK) {
      chroma_log("ERROR", "Failed to create surface for output %u", output->id);
      return ret;
    }
  }

  // Render wallpaper
  int ret = chroma_render_wallpaper(state, output);
  if (ret != CHROMA_OK) {
    chroma_log("ERROR", "Failed to render wallpaper for output %u", output->id);
    return ret;
  }

  chroma_log("INFO", "Assigned wallpaper to output %u (%s): %s", output->id,
             output->name ? output->name : "unknown", image_path);
  chroma_log_memory_stats("post-wallpaper-assignment");

  return CHROMA_OK;
}

// Assign wallpapers to all active outputs
static int assign_wallpapers_to_all_outputs(chroma_state_t *state) {
  if (!state) {
    return CHROMA_ERROR_INIT;
  }

  int success_count = 0;
  int error_count = 0;

  for (int i = 0; i < state->output_count; i++) {
    chroma_output_t *output = &state->outputs[i];

    if (!output->active) {
      chroma_log("DEBUG", "Skipping inactive output %u", output->id);
      continue;
    }

    if (assign_wallpaper_to_output(state, output) == CHROMA_OK) {
      success_count++;
    } else {
      error_count++;
    }
  }

  chroma_log("INFO", "Wallpaper assignment complete: %d success, %d errors",
             success_count, error_count);

  return (success_count > 0) ? CHROMA_OK : CHROMA_ERROR_IMAGE;
}

// Handle output configuration complete event
void handle_output_done(chroma_state_t *state, chroma_output_t *output) {
  if (!state || !output) {
    return;
  }

  chroma_log("INFO",
             "Output %u (%s) configuration complete: %dx%d@%d, scale=%d",
             output->id, output->name ? output->name : "unknown", output->width,
             output->height, 0, output->scale);

  /* Assign wallpaper to this output */
  if (assign_wallpaper_to_output(state, output) != CHROMA_OK) {
    chroma_log("ERROR", "Failed to assign wallpaper to output %u", output->id);
  }
}

// Process Wayland events
static int process_wayland_events(chroma_state_t *state) {
  if (!state || !state->display) {
    return CHROMA_ERROR_WAYLAND;
  }

  // Dispatch pending events
  if (wl_display_dispatch_pending(state->display) == -1) {
    chroma_log("ERROR", "Failed to dispatch pending Wayland events: %s",
               strerror(errno));
    return CHROMA_ERROR_WAYLAND;
  }

  // Read events from the server
  if (wl_display_read_events(state->display) == -1) {
    chroma_log("ERROR", "Failed to read Wayland events: %s", strerror(errno));
    return CHROMA_ERROR_WAYLAND;
  }

  // Dispatch the read events
  if (wl_display_dispatch_pending(state->display) == -1) {
    chroma_log("ERROR", "Failed to dispatch read Wayland events: %s",
               strerror(errno));
    return CHROMA_ERROR_WAYLAND;
  }

  return CHROMA_OK;
}

// Main event loop
int chroma_run(chroma_state_t *state) {
  if (!state || !state->initialized) {
    return CHROMA_ERROR_INIT;
  }

  chroma_log("INFO", "Starting main event loop");
  chroma_log_memory_stats("main-loop-start");
  state->running = true;

  // Initial wallpaper assignment
  chroma_log("INFO", "Performing initial wallpaper assignment");
  assign_wallpapers_to_all_outputs(state);

  // Main event loop
  while (state->running && !chroma_should_quit) {
    // Dispatch any pending events first
    if (wl_display_dispatch_pending(state->display) == -1) {
      chroma_log("ERROR", "Failed to dispatch pending events: %s",
                 strerror(errno));
      break;
    }

    // Prepare to read events
    if (wl_display_prepare_read(state->display) == -1) {
      chroma_log("ERROR", "Failed to prepare Wayland display for reading");
      break;
    }

    // Flush outgoing requests
    if (wl_display_flush(state->display) == -1) {
      chroma_log("ERROR", "Failed to flush Wayland display: %s",
                 strerror(errno));
      wl_display_cancel_read(state->display);
      break;
    }

    // Get the display file descriptor
    int fd = wl_display_get_fd(state->display);
    if (fd == -1) {
      chroma_log("ERROR", "Failed to get Wayland display file descriptor");
      wl_display_cancel_read(state->display);
      break;
    }

    // Use select() to wait for events with timeout
    fd_set readfds;
    struct timeval timeout;

    FD_ZERO(&readfds);
    FD_SET(fd, &readfds);

    timeout.tv_sec = 1; // 1s timeout
    timeout.tv_usec = 0;

    int select_result = select(fd + 1, &readfds, NULL, NULL, &timeout);

    if (select_result == -1) {
      if (errno == EINTR) {
        // Interrupted by signal, check if we should quit
        wl_display_cancel_read(state->display);
        continue;
      }
      chroma_log("ERROR", "select() failed: %s", strerror(errno));
      wl_display_cancel_read(state->display);
      break;
    }

    if (select_result == 0) {
      // Timeout - no events available
      wl_display_cancel_read(state->display);
      continue;
    }

    // Events are available
    if (FD_ISSET(fd, &readfds)) {
      if (process_wayland_events(state) != CHROMA_OK) {
        break;
      }
    } else {
      wl_display_cancel_read(state->display);
    }
  }

  state->running = false;
  chroma_log("INFO", "Main event loop ended");

  return CHROMA_OK;
}

// Error code to string conversion
const char *chroma_error_string(chroma_error_t error) {
  switch (error) {
  case CHROMA_OK:
    return "Success";
  case CHROMA_ERROR_INIT:
    return "Initialization error";
  case CHROMA_ERROR_WAYLAND:
    return "Wayland error";
  case CHROMA_ERROR_EGL:
    return "EGL error";
  case CHROMA_ERROR_IMAGE:
    return "Image loading error";
  case CHROMA_ERROR_CONFIG:
    return "Configuration error";
  case CHROMA_ERROR_MEMORY:
    return "Memory allocation error";
  default:
    return "Unknown error";
  }
}

// Convert log level string to numeric level
static int log_level_from_string(const char *level) {
  if (strcmp(level, "ERROR") == 0)
    return CHROMA_LOG_ERROR;
  if (strcmp(level, "WARN") == 0)
    return CHROMA_LOG_WARN;
  if (strcmp(level, "INFO") == 0)
    return CHROMA_LOG_INFO;
  if (strcmp(level, "DEBUG") == 0)
    return CHROMA_LOG_DEBUG;
  if (strcmp(level, "TRACE") == 0)
    return CHROMA_LOG_TRACE;
  return CHROMA_LOG_ERROR; // default to ERROR for unknown levels
}

// Logging function with level filtering
void chroma_log(const char *level, const char *format, ...) {
  int msg_level = log_level_from_string(level);
  if (msg_level > log_level) {
    return;
  }

  va_list args;
  char timestamp[32];
  struct timeval tv;
  struct tm *tm_info;

  gettimeofday(&tv, NULL);
  tm_info = localtime(&tv.tv_sec);

  snprintf(timestamp, sizeof(timestamp), "%04d-%02d-%02d %02d:%02d:%02d.%03d",
           tm_info->tm_year + 1900, tm_info->tm_mon + 1, tm_info->tm_mday,
           tm_info->tm_hour, tm_info->tm_min, tm_info->tm_sec,
           (int)(tv.tv_usec / 1000));

  printf("[%s] %s: ", timestamp, level);

  va_start(args, format);
  vprintf(format, args);
  va_end(args);

  printf("\n");
  fflush(stdout);
}

// Set log level
void chroma_set_log_level(int level) { log_level = level; }

// Get log level
int chroma_get_log_level(void) { return log_level; }

// Handle configuration reload (SIGHUP)
int chroma_reload_config(chroma_state_t *state, const char *config_file) {
  if (!state) {
    return CHROMA_ERROR_INIT;
  }

  chroma_log("INFO", "Reloading configuration");

  // Free current configuration
  chroma_config_free(&state->config);

  // Load new configuration
  int ret = chroma_config_load(&state->config, config_file);
  if (ret != CHROMA_OK) {
    chroma_log("ERROR", "Failed to reload configuration: %s",
               chroma_error_string(ret));
    return ret;
  }

  // Reassign wallpapers with new configuration
  ret = assign_wallpapers_to_all_outputs(state);
  if (ret != CHROMA_OK) {
    chroma_log("ERROR", "Failed to reassign wallpapers after config reload");
    return ret;
  }

  chroma_log("INFO", "Configuration reloaded successfully");
  return CHROMA_OK;
}

// Check if an output needs wallpaper update
static bool output_needs_update(chroma_output_t *output) {
  if (!output || !output->active) {
    return false;
  }

  // Check if output has no surface or image assigned
  if (!output->surface || !output->image) {
    return true;
  }

  // Check if image is no longer loaded
  if (!output->image->loaded) {
    return true;
  }

  return false;
}

// Update outputs that need wallpaper refresh
int chroma_update_outputs(chroma_state_t *state) {
  if (!state) {
    return CHROMA_ERROR_INIT;
  }

  int updated_count = 0;

  for (int i = 0; i < state->output_count; i++) {
    chroma_output_t *output = &state->outputs[i];

    if (output_needs_update(output)) {
      if (assign_wallpaper_to_output(state, output) == CHROMA_OK) {
        updated_count++;
      }
    }
  }

  if (updated_count > 0) {
    chroma_log("INFO", "Updated wallpapers for %d outputs", updated_count);
  }

  return CHROMA_OK;
}

// Get statistics
void chroma_get_stats(chroma_state_t *state, int *active_outputs,
                      int *loaded_images) {
  if (!state) {
    if (active_outputs)
      *active_outputs = 0;
    if (loaded_images)
      *loaded_images = 0;
    return;
  }

  int active = 0;
  for (int i = 0; i < state->output_count; i++) {
    if (state->outputs[i].active) {
      active++;
    }
  }

  int loaded = 0;
  for (int i = 0; i < state->image_count; i++) {
    if (state->images[i].loaded) {
      loaded++;
    }
  }

  if (active_outputs)
    *active_outputs = active;
  if (loaded_images)
    *loaded_images = loaded;
}

// Get current memory usage from /proc/self/status
// FIXME: some users may choose to confine /proc, we need a cleaner
// way of getting this data in the future
size_t chroma_get_memory_usage(void) {
  FILE *file = fopen("/proc/self/status", "r");
  if (!file) {
    return 0;
  }

  size_t vm_rss = 0;
  char line[256];

  while (fgets(line, sizeof(line), file)) {
    if (strncmp(line, "VmRSS:", 6) == 0) {
      // Parse VmRSS line: "VmRSS:    1234 kB"
      char *ptr = line + 6;
      while (*ptr == ' ' || *ptr == '\t')
        ptr++;                                        // Skip whitespace
      vm_rss = (size_t)strtoul(ptr, NULL, 10) * 1024; // Convert kB to bytes
      break;
    }
  }

  fclose(file);
  return vm_rss;
}

// Log memory statistics with context
void chroma_log_memory_stats(const char *context) {
  size_t memory_usage = chroma_get_memory_usage();
  char mem_str[64];

  chroma_format_memory_size(memory_usage, mem_str, sizeof(mem_str));
  chroma_log("INFO", "Memory usage [%s]: %s", context, mem_str);
}

// Log resource allocation
void chroma_log_resource_allocation(const char *resource_type, size_t size,
                                    const char *description) {
  if (size > 0) {
    char size_str[64];
    chroma_format_memory_size(size, size_str, sizeof(size_str));
    chroma_log("DEBUG", "Allocated %s: %s (%s)", resource_type, size_str,
               description);
  } else {
    chroma_log("DEBUG", "Allocated %s: %s", resource_type, description);
  }

  // Log memory stats after significant allocations (>1MB)
  if (size > 1024 * 1024) {
    chroma_log_memory_stats("post-allocation");
  }
}

// Log resource deallocation
void chroma_log_resource_deallocation(const char *resource_type, size_t size,
                                      const char *description) {
  if (size > 0) {
    char size_str[64];
    chroma_format_memory_size(size, size_str, sizeof(size_str));
    chroma_log("DEBUG", "Deallocated %s: %s (%s)", resource_type, size_str,
               description);
  } else {
    chroma_log("DEBUG", "Deallocated %s: %s", resource_type, description);
  }

  // Log memory stats after significant deallocations (>1MB)
  if (size > 1024 * 1024) {
    chroma_log_memory_stats("post-deallocation");
  }
}

1	#include <errno.h>
2	#include <stdarg.h>
3	#include <stdio.h>
4	#include <stdlib.h>
5	#include <string.h>
6	#include <sys/time.h>
7	#include <time.h>
8	#include <unistd.h>
9
10	#include "../include/chroma.h"
11
12	// Global logging level (using CHROMA_LOG_* constants)
13	static int log_level = CHROMA_LOG_WARN; // Default to WARN and ERROR only
14
15	// Initialize chroma state
16	int chroma_init(chroma_state_t *state) {
17	if (!state) {
18	return CHROMA_ERROR_INIT;
19	}
20
21	// Initialize all fields to zero
22	memset(state, 0, sizeof(chroma_state_t));
23
24	// Set initial state
25	state->running = false;
26	state->initialized = false;
27	state->egl_display = EGL_NO_DISPLAY;
28	state->egl_context = EGL_NO_CONTEXT;
29
30	// Initialize stb_image
31	chroma_image_init_stb();
32
33	state->initialized = true;
34	chroma_log("INFO", "Chroma state initialized");
35	chroma_log_resource_allocation("chroma_state", sizeof(chroma_state_t),
36	"main application state");
37
38	return CHROMA_OK;
39	}
40
41	// Cleanup chroma state
42	void chroma_cleanup(chroma_state_t *state) {
43	if (!state \|\| !state->initialized) {
44	return;
45	}
46
47	chroma_log("INFO", "Cleaning up chroma state");
48	chroma_log_memory_stats("pre-cleanup");
49
50	// Stop the main loop
51	state->running = false;
52
53	// Clean up all images
54	chroma_images_cleanup(state);
55
56	// Clean up EGL
57	chroma_egl_cleanup(state);
58
59	// Clean up Wayland
60	chroma_wayland_disconnect(state);
61
62	// Clean up configuration
63	chroma_config_free(&state->config);
64
65	state->initialized = false;
66	chroma_log_resource_deallocation("chroma_state", sizeof(chroma_state_t),
67	"main application state");
68	chroma_log("INFO", "Chroma cleanup complete");
69	}
70
71	// Assign wallpaper to an output
72	static int assign_wallpaper_to_output(chroma_state_t *state,
73	chroma_output_t *output) {
74	if (!state \|\| !output \|\| !output->active) {
75	return CHROMA_ERROR_INIT;
76	}
77
78	// Get image path for this output
79	const char *image_path = chroma_config_get_image_for_output(
80	&state->config, output->name ? output->name : "unknown");
81	if (!image_path) {
82	chroma_log("WARN", "No wallpaper configured for output %u (%s)", output->id,
83	output->name ? output->name : "unknown");
84	return CHROMA_ERROR_CONFIG;
85	}
86
87	// Load or get cached image
88	chroma_image_t *image = chroma_image_get_or_load(state, image_path);
89	if (!image) {
90	chroma_log("ERROR", "Failed to load image for output %u: %s", output->id,
91	image_path);
92	return CHROMA_ERROR_IMAGE;
93	}
94
95	// Check if image changed and invalidate texture cache if neceessary
96	bool image_changed = (output->image != image);
97	if (image_changed && output->image) {
98	chroma_output_invalidate_texture(output);
99	chroma_log("DEBUG", "Image changed for output %u, invalidated texture",
100	output->id);
101	}
102
103	// Assign image to output
104	output->image = image;
105
106	// Create surface if it doesn't exist
107	if (!output->surface) {
108	int ret = chroma_surface_create(state, output);
109	if (ret != CHROMA_OK) {
110	chroma_log("ERROR", "Failed to create surface for output %u", output->id);
111	return ret;
112	}
113	}
114
115	// Render wallpaper
116	int ret = chroma_render_wallpaper(state, output);
117	if (ret != CHROMA_OK) {
118	chroma_log("ERROR", "Failed to render wallpaper for output %u", output->id);
119	return ret;
120	}
121
122	chroma_log("INFO", "Assigned wallpaper to output %u (%s): %s", output->id,
123	output->name ? output->name : "unknown", image_path);
124	chroma_log_memory_stats("post-wallpaper-assignment");
125
126	return CHROMA_OK;
127	}
128
129	// Assign wallpapers to all active outputs
130	static int assign_wallpapers_to_all_outputs(chroma_state_t *state) {
131	if (!state) {
132	return CHROMA_ERROR_INIT;
133	}
134
135	int success_count = 0;
136	int error_count = 0;
137
138	for (int i = 0; i < state->output_count; i++) {
139	chroma_output_t *output = &state->outputs[i];
140
141	if (!output->active) {
142	chroma_log("DEBUG", "Skipping inactive output %u", output->id);
143	continue;
144	}
145
146	if (assign_wallpaper_to_output(state, output) == CHROMA_OK) {
147	success_count++;
148	} else {
149	error_count++;
150	}
151	}
152
153	chroma_log("INFO", "Wallpaper assignment complete: %d success, %d errors",
154	success_count, error_count);
155
156	return (success_count > 0) ? CHROMA_OK : CHROMA_ERROR_IMAGE;
157	}
158
159	// Handle output configuration complete event
160	void handle_output_done(chroma_state_t state, chroma_output_t output) {
161	if (!state \|\| !output) {
162	return;
163	}
164
165	chroma_log("INFO",
166	"Output %u (%s) configuration complete: %dx%d@%d, scale=%d",
167	output->id, output->name ? output->name : "unknown", output->width,
168	output->height, 0, output->scale);
169
170	/* Assign wallpaper to this output */
171	if (assign_wallpaper_to_output(state, output) != CHROMA_OK) {
172	chroma_log("ERROR", "Failed to assign wallpaper to output %u", output->id);
173	}
174	}
175
176	// Process Wayland events
177	static int process_wayland_events(chroma_state_t *state) {
178	if (!state \|\| !state->display) {
179	return CHROMA_ERROR_WAYLAND;
180	}
181
182	// Dispatch pending events
183	if (wl_display_dispatch_pending(state->display) == -1) {
184	chroma_log("ERROR", "Failed to dispatch pending Wayland events: %s",
185	strerror(errno));
186	return CHROMA_ERROR_WAYLAND;
187	}
188
189	// Read events from the server
190	if (wl_display_read_events(state->display) == -1) {
191	chroma_log("ERROR", "Failed to read Wayland events: %s", strerror(errno));
192	return CHROMA_ERROR_WAYLAND;
193	}
194
195	// Dispatch the read events
196	if (wl_display_dispatch_pending(state->display) == -1) {
197	chroma_log("ERROR", "Failed to dispatch read Wayland events: %s",
198	strerror(errno));
199	return CHROMA_ERROR_WAYLAND;
200	}
201
202	return CHROMA_OK;
203	}
204
205	// Main event loop
206	int chroma_run(chroma_state_t *state) {
207	if (!state \|\| !state->initialized) {
208	return CHROMA_ERROR_INIT;
209	}
210
211	chroma_log("INFO", "Starting main event loop");
212	chroma_log_memory_stats("main-loop-start");
213	state->running = true;
214
215	// Initial wallpaper assignment
216	chroma_log("INFO", "Performing initial wallpaper assignment");
217	assign_wallpapers_to_all_outputs(state);
218
219	// Main event loop
220	while (state->running && !chroma_should_quit) {
221	// Dispatch any pending events first
222	if (wl_display_dispatch_pending(state->display) == -1) {
223	chroma_log("ERROR", "Failed to dispatch pending events: %s",
224	strerror(errno));
225	break;
226	}
227
228	// Prepare to read events
229	if (wl_display_prepare_read(state->display) == -1) {
230	chroma_log("ERROR", "Failed to prepare Wayland display for reading");
231	break;
232	}
233
234	// Flush outgoing requests
235	if (wl_display_flush(state->display) == -1) {
236	chroma_log("ERROR", "Failed to flush Wayland display: %s",
237	strerror(errno));
238	wl_display_cancel_read(state->display);
239	break;
240	}
241
242	// Get the display file descriptor
243	int fd = wl_display_get_fd(state->display);
244	if (fd == -1) {
245	chroma_log("ERROR", "Failed to get Wayland display file descriptor");
246	wl_display_cancel_read(state->display);
247	break;
248	}
249
250	// Use select() to wait for events with timeout
251	fd_set readfds;
252	struct timeval timeout;
253
254	FD_ZERO(&readfds);
255	FD_SET(fd, &readfds);
256
257	timeout.tv_sec = 1; // 1s timeout
258	timeout.tv_usec = 0;
259
260	int select_result = select(fd + 1, &readfds, NULL, NULL, &timeout);
261
262	if (select_result == -1) {
263	if (errno == EINTR) {
264	// Interrupted by signal, check if we should quit
265	wl_display_cancel_read(state->display);
266	continue;
267	}
268	chroma_log("ERROR", "select() failed: %s", strerror(errno));
269	wl_display_cancel_read(state->display);
270	break;
271	}
272
273	if (select_result == 0) {
274	// Timeout - no events available
275	wl_display_cancel_read(state->display);
276	continue;
277	}
278
279	// Events are available
280	if (FD_ISSET(fd, &readfds)) {
281	if (process_wayland_events(state) != CHROMA_OK) {
282	break;
283	}
284	} else {
285	wl_display_cancel_read(state->display);
286	}
287	}
288
289	state->running = false;
290	chroma_log("INFO", "Main event loop ended");
291
292	return CHROMA_OK;
293	}
294
295	// Error code to string conversion
296	const char *chroma_error_string(chroma_error_t error) {
297	switch (error) {
298	case CHROMA_OK:
299	return "Success";
300	case CHROMA_ERROR_INIT:
301	return "Initialization error";
302	case CHROMA_ERROR_WAYLAND:
303	return "Wayland error";
304	case CHROMA_ERROR_EGL:
305	return "EGL error";
306	case CHROMA_ERROR_IMAGE:
307	return "Image loading error";
308	case CHROMA_ERROR_CONFIG:
309	return "Configuration error";
310	case CHROMA_ERROR_MEMORY:
311	return "Memory allocation error";
312	default:
313	return "Unknown error";
314	}
315	}
316
317	// Convert log level string to numeric level
318	static int log_level_from_string(const char *level) {
319	if (strcmp(level, "ERROR") == 0)
320	return CHROMA_LOG_ERROR;
321	if (strcmp(level, "WARN") == 0)
322	return CHROMA_LOG_WARN;
323	if (strcmp(level, "INFO") == 0)
324	return CHROMA_LOG_INFO;
325	if (strcmp(level, "DEBUG") == 0)
326	return CHROMA_LOG_DEBUG;
327	if (strcmp(level, "TRACE") == 0)
328	return CHROMA_LOG_TRACE;
329	return CHROMA_LOG_ERROR; // default to ERROR for unknown levels
330	}
331
332	// Logging function with level filtering
333	void chroma_log(const char level, const char format, ...) {
334	int msg_level = log_level_from_string(level);
335	if (msg_level > log_level) {
336	return;
337	}
338
339	va_list args;
340	char timestamp[32];
341	struct timeval tv;
342	struct tm *tm_info;
343
344	gettimeofday(&tv, NULL);
345	tm_info = localtime(&tv.tv_sec);
346
347	snprintf(timestamp, sizeof(timestamp), "%04d-%02d-%02d %02d:%02d:%02d.%03d",
348	tm_info->tm_year + 1900, tm_info->tm_mon + 1, tm_info->tm_mday,
349	tm_info->tm_hour, tm_info->tm_min, tm_info->tm_sec,
350	(int)(tv.tv_usec / 1000));
351
352	printf("[%s] %s: ", timestamp, level);
353
354	va_start(args, format);
355	vprintf(format, args);
356	va_end(args);
357
358	printf("\n");
359	fflush(stdout);
360	}
361
362	// Set log level
363	void chroma_set_log_level(int level) { log_level = level; }
364
365	// Get log level
366	int chroma_get_log_level(void) { return log_level; }
367
368	// Handle configuration reload (SIGHUP)
369	int chroma_reload_config(chroma_state_t state, const char config_file) {
370	if (!state) {
371	return CHROMA_ERROR_INIT;
372	}
373
374	chroma_log("INFO", "Reloading configuration");
375
376	// Free current configuration
377	chroma_config_free(&state->config);
378
379	// Load new configuration
380	int ret = chroma_config_load(&state->config, config_file);
381	if (ret != CHROMA_OK) {
382	chroma_log("ERROR", "Failed to reload configuration: %s",
383	chroma_error_string(ret));
384	return ret;
385	}
386
387	// Reassign wallpapers with new configuration
388	ret = assign_wallpapers_to_all_outputs(state);
389	if (ret != CHROMA_OK) {
390	chroma_log("ERROR", "Failed to reassign wallpapers after config reload");
391	return ret;
392	}
393
394	chroma_log("INFO", "Configuration reloaded successfully");
395	return CHROMA_OK;
396	}
397
398	// Check if an output needs wallpaper update
399	static bool output_needs_update(chroma_output_t *output) {
400	if (!output \|\| !output->active) {
401	return false;
402	}
403
404	// Check if output has no surface or image assigned
405	if (!output->surface \|\| !output->image) {
406	return true;
407	}
408
409	// Check if image is no longer loaded
410	if (!output->image->loaded) {
411	return true;
412	}
413
414	return false;
415	}
416
417	// Update outputs that need wallpaper refresh
418	int chroma_update_outputs(chroma_state_t *state) {
419	if (!state) {
420	return CHROMA_ERROR_INIT;
421	}
422
423	int updated_count = 0;
424
425	for (int i = 0; i < state->output_count; i++) {
426	chroma_output_t *output = &state->outputs[i];
427
428	if (output_needs_update(output)) {
429	if (assign_wallpaper_to_output(state, output) == CHROMA_OK) {
430	updated_count++;
431	}
432	}
433	}
434
435	if (updated_count > 0) {
436	chroma_log("INFO", "Updated wallpapers for %d outputs", updated_count);
437	}
438
439	return CHROMA_OK;
440	}
441
442	// Get statistics
443	void chroma_get_stats(chroma_state_t state, int active_outputs,
444	int *loaded_images) {
445	if (!state) {
446	if (active_outputs)
447	*active_outputs = 0;
448	if (loaded_images)
449	*loaded_images = 0;
450	return;
451	}
452
453	int active = 0;
454	for (int i = 0; i < state->output_count; i++) {
455	if (state->outputs[i].active) {
456	active++;
457	}
458	}
459
460	int loaded = 0;
461	for (int i = 0; i < state->image_count; i++) {
462	if (state->images[i].loaded) {
463	loaded++;
464	}
465	}
466
467	if (active_outputs)
468	*active_outputs = active;
469	if (loaded_images)
470	*loaded_images = loaded;
471	}
472
473	// Get current memory usage from /proc/self/status
474	// FIXME: some users may choose to confine /proc, we need a cleaner
475	// way of getting this data in the future
476	size_t chroma_get_memory_usage(void) {
477	FILE *file = fopen("/proc/self/status", "r");
478	if (!file) {
479	return 0;
480	}
481
482	size_t vm_rss = 0;
483	char line[256];
484
485	while (fgets(line, sizeof(line), file)) {
486	if (strncmp(line, "VmRSS:", 6) == 0) {
487	// Parse VmRSS line: "VmRSS: 1234 kB"
488	char *ptr = line + 6;
489	while (ptr == ' ' \|\| ptr == '\t')
490	ptr++; // Skip whitespace
491	vm_rss = (size_t)strtoul(ptr, NULL, 10) * 1024; // Convert kB to bytes
492	break;
493	}
494	}
495
496	fclose(file);
497	return vm_rss;
498	}
499
500	// Log memory statistics with context
501	void chroma_log_memory_stats(const char *context) {
502	size_t memory_usage = chroma_get_memory_usage();
503	char mem_str[64];
504
505	chroma_format_memory_size(memory_usage, mem_str, sizeof(mem_str));
506	chroma_log("INFO", "Memory usage [%s]: %s", context, mem_str);
507	}
508
509	// Log resource allocation
510	void chroma_log_resource_allocation(const char *resource_type, size_t size,
511	const char *description) {
512	if (size > 0) {
513	char size_str[64];
514	chroma_format_memory_size(size, size_str, sizeof(size_str));
515	chroma_log("DEBUG", "Allocated %s: %s (%s)", resource_type, size_str,
516	description);
517	} else {
518	chroma_log("DEBUG", "Allocated %s: %s", resource_type, description);
519	}
520
521	// Log memory stats after significant allocations (>1MB)
522	if (size > 1024 * 1024) {
523	chroma_log_memory_stats("post-allocation");
524	}
525	}
526
527	// Log resource deallocation
528	void chroma_log_resource_deallocation(const char *resource_type, size_t size,
529	const char *description) {
530	if (size > 0) {
531	char size_str[64];
532	chroma_format_memory_size(size, size_str, sizeof(size_str));
533	chroma_log("DEBUG", "Deallocated %s: %s (%s)", resource_type, size_str,
534	description);
535	} else {
536	chroma_log("DEBUG", "Deallocated %s: %s", resource_type, description);
537	}
538
539	// Log memory stats after significant deallocations (>1MB)
540	if (size > 1024 * 1024) {
541	chroma_log_memory_stats("post-deallocation");
542	}
543	}