chroma

public

Lightweight wallpaper daemon for Wayland

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

#define STB_IMAGE_IMPLEMENTATION
#include "../include/stb_image.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>

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

// Check if file exists and is readable
static int file_exists(const char *path) {
  struct stat st;
  return (stat(path, &st) == 0 && S_ISREG(st.st_mode));
}

// Get file size
static long get_file_size(const char *path) {
  struct stat st;
  if (stat(path, &st) != 0) {
    return -1;
  }
  return st.st_size;
}

// Calculate optimal image size based on output dimensions
static void calculate_optimal_size(int original_width, int original_height,
                                   int max_output_width, int max_output_height,
                                   int *optimal_width, int *optimal_height) {
  // If image is smaller than outputs, keep original size
  if (original_width <= max_output_width &&
      original_height <= max_output_height) {
    *optimal_width = original_width;
    *optimal_height = original_height;
    return;
  }

  // Calculate scale factor to fit within max output dimensions
  float scale_x = (float)max_output_width / original_width;
  float scale_y = (float)max_output_height / original_height;
  float scale = (scale_x < scale_y) ? scale_x : scale_y;

  // Apply scale factor with minimum size to avoid too small images
  scale = (scale > 1.0f) ? 1.0f : scale;
  scale = (scale < 0.25f) ? 0.25f : scale; // XXX: don't scale below 25%

  *optimal_width = (int)(original_width * scale);
  *optimal_height = (int)(original_height * scale);

  // Ensure even dimensions for better GPU alignment
  *optimal_width = (*optimal_width / 2) * 2;
  *optimal_height = (*optimal_height / 2) * 2;
}

// FIXME: this is a very simple way of implementing box filter downsampling for
// memory efficiency Could be better, but this is good enough *for the time
// being*. Must be revisited in the future to see how it stands as the program
// evolves.
static int downsample_image(unsigned char *src_data, int src_width,
                            int src_height, unsigned char *dst_data,
                            int dst_width, int dst_height) {
  if (!src_data || !dst_data) {
    return -1;
  }

  float x_ratio = (float)src_width / dst_width;
  float y_ratio = (float)src_height / dst_height;

  for (int y = 0; y < dst_height; y++) {
    for (int x = 0; x < dst_width; x++) {
      // Calculate corresponding source pixel
      int src_x = (int)(x * x_ratio);
      int src_y = (int)(y * y_ratio);

      // Ensure we're within bounds
      src_x = (src_x >= src_width) ? src_width - 1 : src_x;
      src_y = (src_y >= src_height) ? src_height - 1 : src_y;

      // Copy pixel (RGBA)
      int src_idx = (src_y * src_width + src_x) * 4;
      int dst_idx = (y * dst_width + x) * 4;

      dst_data[dst_idx + 0] = src_data[src_idx + 0]; // R
      dst_data[dst_idx + 1] = src_data[src_idx + 1]; // G
      dst_data[dst_idx + 2] = src_data[src_idx + 2]; // B
      dst_data[dst_idx + 3] = src_data[src_idx + 3]; // A
    }
  }

  return 0;
}

// Load image from file with configurable downsampling
int chroma_image_load(chroma_image_t *image, const char *path,
                      const chroma_config_t *config) {
  if (!image || !path) {
    chroma_log("ERROR", "Invalid parameters for image loading");
    return CHROMA_ERROR_INIT;
  }

  // Initialize image structure
  memset(image, 0, sizeof(chroma_image_t));
  strncpy(image->path, path, MAX_PATH_LEN - 1);
  image->path[MAX_PATH_LEN - 1] = '\0';

  // Check if file exists
  if (!file_exists(path)) {
    chroma_log("ERROR", "Image file does not exist: %s", path);
    return CHROMA_ERROR_IMAGE;
  }

  // Get file size for logging
  long file_size = get_file_size(path);
  if (file_size > 0) {
    chroma_log("DEBUG", "Loading image: %s (%.2f MB)", path,
               (double)file_size / (1024.0 * 1024.0));
  }

  // Load image data using stb_image, force RGBA format to avoid conversion
  stbi_set_flip_vertically_on_load(0); // keep images right-side up

  image->data =
      stbi_load(path, &image->width, &image->height, &image->channels, 4);
  image->channels = 4; // always RGBA after forced conversion
  if (!image->data) {
    chroma_log("ERROR", "Failed to load image %s: %s", path,
               stbi_failure_reason());
    return CHROMA_ERROR_IMAGE;
  }

  // Validate image dimensions
  if (image->width <= 0 || image->height <= 0) {
    chroma_log("ERROR", "Invalid image dimensions: %dx%d", image->width,
               image->height);
    chroma_image_free(image);
    return CHROMA_ERROR_IMAGE;
  }

  // Validate we have RGBA data (should always be true with forced conversion)
  if (image->channels != 4) {
    chroma_log("ERROR", "Failed to load image as RGBA: got %d channels",
               image->channels);
    chroma_image_free(image);
    return CHROMA_ERROR_IMAGE;
  }

  // Store original dimensions before potential downsampling
  int original_width = image->width;
  int original_height = image->height;

  // Apply intelligent downsampling if enabled
  bool should_downsample = false;
  int optimal_width = original_width;
  int optimal_height = original_height;

  if (config && config->enable_downsampling) {
    calculate_optimal_size(original_width, original_height,
                           config->max_output_width, config->max_output_height,
                           &optimal_width, &optimal_height);

    // Apply minimum scale factor constraint
    float scale_x = (float)optimal_width / original_width;
    float scale_y = (float)optimal_height / original_height;
    float scale = (scale_x < scale_y) ? scale_x : scale_y;

    if (scale < config->min_scale_factor) {
      scale = config->min_scale_factor;
      optimal_width = (int)(original_width * scale);
      optimal_height = (int)(original_height * scale);

      // Ensure even dimensions
      optimal_width = (optimal_width / 2) * 2;
      optimal_height = (optimal_height / 2) * 2;
    }

    should_downsample =
        (optimal_width < original_width || optimal_height < original_height);
  }

  // Downsamp if needed and enabled
  if (should_downsample) {
    chroma_log("INFO",
               "Downsampling image from %dx%d to %dx%d (%.1f%% of original)",
               original_width, original_height, optimal_width, optimal_height,
               (float)(optimal_width * optimal_height) /
                   (original_width * original_height) * 100.0f);

    size_t optimal_size = (size_t)optimal_width * optimal_height * 4;
    unsigned char *downsampled_data = malloc(optimal_size);
    if (!downsampled_data) {
      chroma_log("ERROR", "Failed to allocate memory for downsampled image");
      chroma_image_free(image);
      return CHROMA_ERROR_MEMORY;
    }

    if (downsample_image(image->data, original_width, original_height,
                         downsampled_data, optimal_width,
                         optimal_height) != 0) {
      chroma_log("ERROR", "Failed to downsample image");
      free(downsampled_data);
      chroma_image_free(image);
      return CHROMA_ERROR_IMAGE;
    }

    stbi_image_free(image->data);
    image->data = downsampled_data;
    image->width = optimal_width;
    image->height = optimal_height;

    chroma_log("DEBUG", "Successfully downsampled image to %dx%d",
               optimal_width, optimal_height);
  } else if (config && !config->enable_downsampling) {
    chroma_log("DEBUG",
               "Downsampling disabled, keeping original resolution %dx%d",
               original_width, original_height);
  }

  image->loaded = true;

  // Calculate and log memory allocation
  size_t image_size = (size_t)image->width * image->height * image->channels;
  chroma_log_resource_allocation("image_data", image_size, path);

  chroma_log("INFO", "Loaded image: %s (%dx%d, %d channels, %.2f MB)%s", path,
             image->width, image->height, image->channels,
             (double)image_size / (1024.0 * 1024.0),
             should_downsample ? " (downsampled)" : "");

  return CHROMA_OK;
}

// Free image data
void chroma_image_free(chroma_image_t *image) {
  if (!image) {
    return;
  }

  if (image->data) {
    // Log memory deallocation before freeing
    size_t image_size = (size_t)image->width * image->height * image->channels;
    chroma_log_resource_deallocation("image_data", image_size, image->path);

    // Always use stbi_image_free since we load directly with stbi_load
    stbi_image_free(image->data);
    image->data = NULL;
  }

  image->width = 0;
  image->height = 0;
  image->channels = 0;
  image->loaded = false;

  if (strlen(image->path) > 0) {
    chroma_log("DEBUG", "Freed image: %s", image->path);
  }

  memset(image->path, 0, sizeof(image->path));
}

// Find image by path in state
chroma_image_t *chroma_image_find_by_path(chroma_state_t *state,
                                          const char *path) {
  if (!state || !path) {
    return NULL;
  }

  for (int i = 0; i < state->image_count; i++) {
    if (strcmp(state->images[i].path, path) == 0) {
      return &state->images[i];
    }
  }

  return NULL;
}

// Load image if not already loaded
chroma_image_t *chroma_image_get_or_load(chroma_state_t *state,
                                         const char *path) {
  if (!state || !path) {
    return NULL;
  }

  // Check if already loaded
  chroma_image_t *existing = chroma_image_find_by_path(state, path);
  if (existing && existing->loaded) {
    chroma_log("DEBUG", "Using cached image: %s", path);
    return existing;
  }

  // Find empty slot or reuse existing
  chroma_image_t *image = existing;
  if (!image) {
    if (state->image_count >= MAX_OUTPUTS) {
      chroma_log("ERROR", "Maximum number of images reached");
      return NULL;
    }
    image = &state->images[state->image_count];
    state->image_count++;
  }

  // Load the image with configuration
  if (chroma_image_load(image, path, &state->config) != CHROMA_OK) {
    // If this was a new slot, decrement count
    if (!existing) {
      state->image_count--;
    }
    return NULL;
  }

  return image;
}

// Validate image file format
int chroma_image_validate(const char *path) {
  if (!path || !file_exists(path)) {
    return CHROMA_ERROR_IMAGE;
  }

  // Check file extension (basic validation)
  const char *ext = strrchr(path, '.');
  if (!ext) {
    return CHROMA_ERROR_IMAGE;
  }

  ext++; // Skip the dot

  // Check supported extensions
  if (strcasecmp(ext, "jpg") == 0 || strcasecmp(ext, "jpeg") == 0 ||
      strcasecmp(ext, "png") == 0 || strcasecmp(ext, "bmp") == 0 ||
      strcasecmp(ext, "tga") == 0 || strcasecmp(ext, "psd") == 0 ||
      strcasecmp(ext, "gif") == 0 || strcasecmp(ext, "hdr") == 0 ||
      strcasecmp(ext, "pic") == 0 || strcasecmp(ext, "ppm") == 0 ||
      strcasecmp(ext, "pgm") == 0) {
    return CHROMA_OK;
  }

  chroma_log("WARN", "Potentially unsupported image format: %s", ext);
  return CHROMA_ERROR_IMAGE;
}

// Get image info without loading full data
int chroma_image_get_info(const char *path, int *width, int *height,
                          int *channels) {
  if (!path || !width || !height || !channels) {
    return CHROMA_ERROR_INIT;
  }

  if (!file_exists(path)) {
    return CHROMA_ERROR_IMAGE;
  }

  if (!stbi_info(path, width, height, channels)) {
    chroma_log("ERROR", "Failed to get image info for %s: %s", path,
               stbi_failure_reason());
    return CHROMA_ERROR_IMAGE;
  }

  return CHROMA_OK;
}

// Cleanup all images in state
void chroma_images_cleanup(chroma_state_t *state) {
  if (!state) {
    return;
  }

  chroma_log("DEBUG", "Cleaning up %d images", state->image_count);

  for (int i = 0; i < state->image_count; i++) {
    chroma_image_free(&state->images[i]);
  }

  state->image_count = 0;
  chroma_log("INFO", "Cleaned up all images");
  chroma_log_memory_stats("post-image-cleanup");
}

// Preload common image formats for validation
void chroma_image_init_stb(void) {
  // Set stb_image options
  stbi_set_flip_vertically_on_load(0);

  // FIXME: these could be made configurable
  stbi_ldr_to_hdr_gamma(2.2f);
  stbi_ldr_to_hdr_scale(1.0f);

  chroma_log("DEBUG", "Initialized stb_image library");
}

1	#define STB_IMAGE_IMPLEMENTATION
2	#include "../include/stb_image.h"
3
4	#include <stdio.h>
5	#include <stdlib.h>
6	#include <string.h>
7	#include <strings.h>
8	#include <sys/stat.h>
9
10	#include "../include/chroma.h"
11
12	// Check if file exists and is readable
13	static int file_exists(const char *path) {
14	struct stat st;
15	return (stat(path, &st) == 0 && S_ISREG(st.st_mode));
16	}
17
18	// Get file size
19	static long get_file_size(const char *path) {
20	struct stat st;
21	if (stat(path, &st) != 0) {
22	return -1;
23	}
24	return st.st_size;
25	}
26
27	// Calculate optimal image size based on output dimensions
28	static void calculate_optimal_size(int original_width, int original_height,
29	int max_output_width, int max_output_height,
30	int optimal_width, int optimal_height) {
31	// If image is smaller than outputs, keep original size
32	if (original_width <= max_output_width &&
33	original_height <= max_output_height) {
34	*optimal_width = original_width;
35	*optimal_height = original_height;
36	return;
37	}
38
39	// Calculate scale factor to fit within max output dimensions
40	float scale_x = (float)max_output_width / original_width;
41	float scale_y = (float)max_output_height / original_height;
42	float scale = (scale_x < scale_y) ? scale_x : scale_y;
43
44	// Apply scale factor with minimum size to avoid too small images
45	scale = (scale > 1.0f) ? 1.0f : scale;
46	scale = (scale < 0.25f) ? 0.25f : scale; // XXX: don't scale below 25%
47
48	optimal_width = (int)(original_width scale);
49	optimal_height = (int)(original_height scale);
50
51	// Ensure even dimensions for better GPU alignment
52	optimal_width = (optimal_width / 2) * 2;
53	optimal_height = (optimal_height / 2) * 2;
54	}
55
56	// FIXME: this is a very simple way of implementing box filter downsampling for
57	// memory efficiency Could be better, but this is good enough *for the time
58	// being*. Must be revisited in the future to see how it stands as the program
59	// evolves.
60	static int downsample_image(unsigned char *src_data, int src_width,
61	int src_height, unsigned char *dst_data,
62	int dst_width, int dst_height) {
63	if (!src_data \|\| !dst_data) {
64	return -1;
65	}
66
67	float x_ratio = (float)src_width / dst_width;
68	float y_ratio = (float)src_height / dst_height;
69
70	for (int y = 0; y < dst_height; y++) {
71	for (int x = 0; x < dst_width; x++) {
72	// Calculate corresponding source pixel
73	int src_x = (int)(x * x_ratio);
74	int src_y = (int)(y * y_ratio);
75
76	// Ensure we're within bounds
77	src_x = (src_x >= src_width) ? src_width - 1 : src_x;
78	src_y = (src_y >= src_height) ? src_height - 1 : src_y;
79
80	// Copy pixel (RGBA)
81	int src_idx = (src_y * src_width + src_x) * 4;
82	int dst_idx = (y * dst_width + x) * 4;
83
84	dst_data[dst_idx + 0] = src_data[src_idx + 0]; // R
85	dst_data[dst_idx + 1] = src_data[src_idx + 1]; // G
86	dst_data[dst_idx + 2] = src_data[src_idx + 2]; // B
87	dst_data[dst_idx + 3] = src_data[src_idx + 3]; // A
88	}
89	}
90
91	return 0;
92	}
93
94	// Load image from file with configurable downsampling
95	int chroma_image_load(chroma_image_t image, const char path,
96	const chroma_config_t *config) {
97	if (!image \|\| !path) {
98	chroma_log("ERROR", "Invalid parameters for image loading");
99	return CHROMA_ERROR_INIT;
100	}
101
102	// Initialize image structure
103	memset(image, 0, sizeof(chroma_image_t));
104	strncpy(image->path, path, MAX_PATH_LEN - 1);
105	image->path[MAX_PATH_LEN - 1] = '\0';
106
107	// Check if file exists
108	if (!file_exists(path)) {
109	chroma_log("ERROR", "Image file does not exist: %s", path);
110	return CHROMA_ERROR_IMAGE;
111	}
112
113	// Get file size for logging
114	long file_size = get_file_size(path);
115	if (file_size > 0) {
116	chroma_log("DEBUG", "Loading image: %s (%.2f MB)", path,
117	(double)file_size / (1024.0 * 1024.0));
118	}
119
120	// Load image data using stb_image, force RGBA format to avoid conversion
121	stbi_set_flip_vertically_on_load(0); // keep images right-side up
122
123	image->data =
124	stbi_load(path, &image->width, &image->height, &image->channels, 4);
125	image->channels = 4; // always RGBA after forced conversion
126	if (!image->data) {
127	chroma_log("ERROR", "Failed to load image %s: %s", path,
128	stbi_failure_reason());
129	return CHROMA_ERROR_IMAGE;
130	}
131
132	// Validate image dimensions
133	if (image->width <= 0 \|\| image->height <= 0) {
134	chroma_log("ERROR", "Invalid image dimensions: %dx%d", image->width,
135	image->height);
136	chroma_image_free(image);
137	return CHROMA_ERROR_IMAGE;
138	}
139
140	// Validate we have RGBA data (should always be true with forced conversion)
141	if (image->channels != 4) {
142	chroma_log("ERROR", "Failed to load image as RGBA: got %d channels",
143	image->channels);
144	chroma_image_free(image);
145	return CHROMA_ERROR_IMAGE;
146	}
147
148	// Store original dimensions before potential downsampling
149	int original_width = image->width;
150	int original_height = image->height;
151
152	// Apply intelligent downsampling if enabled
153	bool should_downsample = false;
154	int optimal_width = original_width;
155	int optimal_height = original_height;
156
157	if (config && config->enable_downsampling) {
158	calculate_optimal_size(original_width, original_height,
159	config->max_output_width, config->max_output_height,
160	&optimal_width, &optimal_height);
161
162	// Apply minimum scale factor constraint
163	float scale_x = (float)optimal_width / original_width;
164	float scale_y = (float)optimal_height / original_height;
165	float scale = (scale_x < scale_y) ? scale_x : scale_y;
166
167	if (scale < config->min_scale_factor) {
168	scale = config->min_scale_factor;
169	optimal_width = (int)(original_width * scale);
170	optimal_height = (int)(original_height * scale);
171
172	// Ensure even dimensions
173	optimal_width = (optimal_width / 2) * 2;
174	optimal_height = (optimal_height / 2) * 2;
175	}
176
177	should_downsample =
178	(optimal_width < original_width \|\| optimal_height < original_height);
179	}
180
181	// Downsamp if needed and enabled
182	if (should_downsample) {
183	chroma_log("INFO",
184	"Downsampling image from %dx%d to %dx%d (%.1f%% of original)",
185	original_width, original_height, optimal_width, optimal_height,
186	(float)(optimal_width * optimal_height) /
187	(original_width * original_height) * 100.0f);
188
189	size_t optimal_size = (size_t)optimal_width * optimal_height * 4;
190	unsigned char *downsampled_data = malloc(optimal_size);
191	if (!downsampled_data) {
192	chroma_log("ERROR", "Failed to allocate memory for downsampled image");
193	chroma_image_free(image);
194	return CHROMA_ERROR_MEMORY;
195	}
196
197	if (downsample_image(image->data, original_width, original_height,
198	downsampled_data, optimal_width,
199	optimal_height) != 0) {
200	chroma_log("ERROR", "Failed to downsample image");
201	free(downsampled_data);
202	chroma_image_free(image);
203	return CHROMA_ERROR_IMAGE;
204	}
205
206	stbi_image_free(image->data);
207	image->data = downsampled_data;
208	image->width = optimal_width;
209	image->height = optimal_height;
210
211	chroma_log("DEBUG", "Successfully downsampled image to %dx%d",
212	optimal_width, optimal_height);
213	} else if (config && !config->enable_downsampling) {
214	chroma_log("DEBUG",
215	"Downsampling disabled, keeping original resolution %dx%d",
216	original_width, original_height);
217	}
218
219	image->loaded = true;
220
221	// Calculate and log memory allocation
222	size_t image_size = (size_t)image->width * image->height * image->channels;
223	chroma_log_resource_allocation("image_data", image_size, path);
224
225	chroma_log("INFO", "Loaded image: %s (%dx%d, %d channels, %.2f MB)%s", path,
226	image->width, image->height, image->channels,
227	(double)image_size / (1024.0 * 1024.0),
228	should_downsample ? " (downsampled)" : "");
229
230	return CHROMA_OK;
231	}
232
233	// Free image data
234	void chroma_image_free(chroma_image_t *image) {
235	if (!image) {
236	return;
237	}
238
239	if (image->data) {
240	// Log memory deallocation before freeing
241	size_t image_size = (size_t)image->width * image->height * image->channels;
242	chroma_log_resource_deallocation("image_data", image_size, image->path);
243
244	// Always use stbi_image_free since we load directly with stbi_load
245	stbi_image_free(image->data);
246	image->data = NULL;
247	}
248
249	image->width = 0;
250	image->height = 0;
251	image->channels = 0;
252	image->loaded = false;
253
254	if (strlen(image->path) > 0) {
255	chroma_log("DEBUG", "Freed image: %s", image->path);
256	}
257
258	memset(image->path, 0, sizeof(image->path));
259	}
260
261	// Find image by path in state
262	chroma_image_t chroma_image_find_by_path(chroma_state_t state,
263	const char *path) {
264	if (!state \|\| !path) {
265	return NULL;
266	}
267
268	for (int i = 0; i < state->image_count; i++) {
269	if (strcmp(state->images[i].path, path) == 0) {
270	return &state->images[i];
271	}
272	}
273
274	return NULL;
275	}
276
277	// Load image if not already loaded
278	chroma_image_t chroma_image_get_or_load(chroma_state_t state,
279	const char *path) {
280	if (!state \|\| !path) {
281	return NULL;
282	}
283
284	// Check if already loaded
285	chroma_image_t *existing = chroma_image_find_by_path(state, path);
286	if (existing && existing->loaded) {
287	chroma_log("DEBUG", "Using cached image: %s", path);
288	return existing;
289	}
290
291	// Find empty slot or reuse existing
292	chroma_image_t *image = existing;
293	if (!image) {
294	if (state->image_count >= MAX_OUTPUTS) {
295	chroma_log("ERROR", "Maximum number of images reached");
296	return NULL;
297	}
298	image = &state->images[state->image_count];
299	state->image_count++;
300	}
301
302	// Load the image with configuration
303	if (chroma_image_load(image, path, &state->config) != CHROMA_OK) {
304	// If this was a new slot, decrement count
305	if (!existing) {
306	state->image_count--;
307	}
308	return NULL;
309	}
310
311	return image;
312	}
313
314	// Validate image file format
315	int chroma_image_validate(const char *path) {
316	if (!path \|\| !file_exists(path)) {
317	return CHROMA_ERROR_IMAGE;
318	}
319
320	// Check file extension (basic validation)
321	const char *ext = strrchr(path, '.');
322	if (!ext) {
323	return CHROMA_ERROR_IMAGE;
324	}
325
326	ext++; // Skip the dot
327
328	// Check supported extensions
329	if (strcasecmp(ext, "jpg") == 0 \|\| strcasecmp(ext, "jpeg") == 0 \|\|
330	strcasecmp(ext, "png") == 0 \|\| strcasecmp(ext, "bmp") == 0 \|\|
331	strcasecmp(ext, "tga") == 0 \|\| strcasecmp(ext, "psd") == 0 \|\|
332	strcasecmp(ext, "gif") == 0 \|\| strcasecmp(ext, "hdr") == 0 \|\|
333	strcasecmp(ext, "pic") == 0 \|\| strcasecmp(ext, "ppm") == 0 \|\|
334	strcasecmp(ext, "pgm") == 0) {
335	return CHROMA_OK;
336	}
337
338	chroma_log("WARN", "Potentially unsupported image format: %s", ext);
339	return CHROMA_ERROR_IMAGE;
340	}
341
342	// Get image info without loading full data
343	int chroma_image_get_info(const char path, int width, int *height,
344	int *channels) {
345	if (!path \|\| !width \|\| !height \|\| !channels) {
346	return CHROMA_ERROR_INIT;
347	}
348
349	if (!file_exists(path)) {
350	return CHROMA_ERROR_IMAGE;
351	}
352
353	if (!stbi_info(path, width, height, channels)) {
354	chroma_log("ERROR", "Failed to get image info for %s: %s", path,
355	stbi_failure_reason());
356	return CHROMA_ERROR_IMAGE;
357	}
358
359	return CHROMA_OK;
360	}
361
362	// Cleanup all images in state
363	void chroma_images_cleanup(chroma_state_t *state) {
364	if (!state) {
365	return;
366	}
367
368	chroma_log("DEBUG", "Cleaning up %d images", state->image_count);
369
370	for (int i = 0; i < state->image_count; i++) {
371	chroma_image_free(&state->images[i]);
372	}
373
374	state->image_count = 0;
375	chroma_log("INFO", "Cleaned up all images");
376	chroma_log_memory_stats("post-image-cleanup");
377	}
378
379	// Preload common image formats for validation
380	void chroma_image_init_stb(void) {
381	// Set stb_image options
382	stbi_set_flip_vertically_on_load(0);
383
384	// FIXME: these could be made configurable
385	stbi_ldr_to_hdr_gamma(2.2f);
386	stbi_ldr_to_hdr_scale(1.0f);
387
388	chroma_log("DEBUG", "Initialized stb_image library");
389	}