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/* enhancer.c — GEGL quick-enhance presets (optional, feature-gated). */
#include "enhancer.h"
struct Enhancer {
GPtrArray *p_presets;
};
static void
_preset_free(gpointer p) {
EnhancerPreset *d = (EnhancerPreset *)p;
if (d) {
g_free(d->c_name);
g_free(d->c_graph);
g_free(d);
}
}
Enhancer *
enhancer_new(void) {
Enhancer *e = g_new0(Enhancer, 1);
e->p_presets = g_ptr_array_new_with_free_func(_preset_free);
/* Built-in presets (programmatic; graph=NULL). */
const char *names[] = {
"Auto-fix", "Brightness", "Contrast", "Saturation",
"Warm", "Cool", "Sharpen", "Denoise",
};
for (guint i = 0; i < G_N_ELEMENTS(names); i++) {
EnhancerPreset *p = g_new0(EnhancerPreset, 1);
p->c_name = g_strdup(names[i]);
p->i_builtin = 1;
g_ptr_array_add(e->p_presets, p);
}
return e;
}
void
enhancer_delete(Enhancer *e) {
if (!e)
return;
g_ptr_array_unref(e->p_presets);
g_free(e);
}
void
enhancer_set_presets(Enhancer *e, const GPtrArray *p) {
g_return_if_fail(e);
g_ptr_array_set_size(e->p_presets, 0);
if (!p)
return;
for (guint i = 0; i < p->len; i++) {
const EnhancerPreset *s = g_ptr_array_index((GPtrArray *)p, i);
EnhancerPreset *np = g_new0(EnhancerPreset, 1);
np->c_name = g_strdup(s->c_name);
np->c_graph = g_strdup(s->c_graph);
np->i_builtin = s->i_builtin;
g_ptr_array_add(e->p_presets, np);
}
}
const GPtrArray *
enhancer_get_presets(Enhancer *e) {
return e ? e->p_presets : NULL;
}
/* Build and apply a GEGL graph for a built-in preset. */
static GeglBuffer *
_apply_builtin(GeglBuffer *p_in, const char *c_name, GError **p_err) {
GeglNode *p_graph = gegl_node_new();
GeglNode *p_src = gegl_node_new_child(
p_graph, "operation", "gegl:buffer-source", "buffer", p_in, NULL);
GeglNode *p_op = NULL;
if (g_str_equal(c_name, "Auto-fix")) {
p_op = gegl_node_new_child(p_graph, "operation", "gegl:stretch-contrast",
NULL);
} else if (g_str_equal(c_name, "Brightness")) {
p_op = gegl_node_new_child(p_graph, "operation", "gegl:exposure",
"exposure", 0.5, NULL);
} else if (g_str_equal(c_name, "Contrast")) {
p_op =
gegl_node_new_child(p_graph, "operation", "gegl:brightness-contrast",
"contrast", 1.3, NULL);
} else if (g_str_equal(c_name, "Saturation")) {
p_op = gegl_node_new_child(p_graph, "operation", "gegl:saturation",
"scale", 1.4, NULL);
} else if (g_str_equal(c_name, "Warm")) {
p_op =
gegl_node_new_child(p_graph, "operation", "gegl:color-enhance", NULL);
} else if (g_str_equal(c_name, "Cool")) {
p_op = gegl_node_new_child(p_graph, "operation", "gegl:exposure",
"exposure", -0.3, NULL);
} else if (g_str_equal(c_name, "Sharpen")) {
p_op =
gegl_node_new_child(p_graph, "operation", "gegl:unsharp-mask", NULL);
} else if (g_str_equal(c_name, "Denoise")) {
p_op = gegl_node_new_child(p_graph, "operation", "gegl:noise-reduction",
NULL);
}
if (p_op == NULL) {
g_object_unref(p_graph);
g_set_error(p_err, G_IO_ERROR, G_IO_ERROR_FAILED,
"enhancer: unknown preset '%s'", c_name);
return NULL;
}
gegl_node_link(p_src, p_op);
GeglRectangle st_rect = {0, 0, gegl_buffer_get_width(p_in),
gegl_buffer_get_height(p_in)};
GeglBuffer *p_out = gegl_buffer_new(&st_rect, babl_format("RGBA float"));
GeglNode *p_sink = gegl_node_new_child(
p_graph, "operation", "gegl:buffer-sink", "buffer", &p_out, NULL);
gegl_node_link(p_op, p_sink);
gegl_node_process(p_sink);
g_object_unref(p_graph);
return p_out;
}
GeglBuffer *
enhancer_apply(Enhancer *e, GeglBuffer *p_in, const EnhancerPreset *p_preset,
GError **p_err) {
(void)e;
g_return_val_if_fail(p_in != NULL, NULL);
g_return_val_if_fail(p_preset != NULL, NULL);
if (p_preset->i_builtin) {
return _apply_builtin(p_in, p_preset->c_name, p_err);
}
/* User preset: parse a GEGL graph string. */
if (p_preset->c_graph == NULL) {
g_set_error(p_err, G_IO_ERROR, G_IO_ERROR_FAILED,
"enhancer: empty graph for preset '%s'", p_preset->c_name);
return NULL;
}
/* TODO: implement gegl_node_new_from_xml parsing. For M9 v1, built-in only.
*/
g_set_error(p_err, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"enhancer: user graph presets not yet supported");
return NULL;
}
gboolean
enhancer_export(Enhancer *e, GeglBuffer *p_in, const EnhancerPreset *p_preset,
GFile *p_out, GError **p_err) {
(void)e;
(void)p_preset;
g_return_val_if_fail(p_in != NULL, FALSE);
g_return_val_if_fail(p_out != NULL, FALSE);
/* Apply the preset first. */
GeglBuffer *p_buf = enhancer_apply(NULL, p_in, p_preset, p_err);
if (p_buf == NULL)
return FALSE;
char *c_path = g_file_get_path(p_out);
if (c_path == NULL) {
g_object_unref(p_buf);
g_set_error(p_err, G_IO_ERROR, G_IO_ERROR_FAILED,
"enhancer: non-local export path");
return FALSE;
}
GeglNode *p_graph = gegl_node_new();
GeglNode *p_src = gegl_node_new_child(
p_graph, "operation", "gegl:buffer-source", "buffer", p_buf, NULL);
GeglNode *p_save = gegl_node_new_child(p_graph, "operation", "gegl:jpg-save",
"path", c_path, NULL);
gegl_node_link(p_src, p_save);
gegl_node_process(p_save);
gboolean b_ok = g_file_test(c_path, G_FILE_TEST_EXISTS);
g_object_unref(p_graph);
g_object_unref(p_buf);
g_free(c_path);
return b_ok;
}
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