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Hardcode Exif orientation in thumbnails

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This commit is contained in:
Přemysl Eric Janouch
2021-12-28 23:10:45 +01:00
parent bf47782f0a
commit 98bdab443a
4 changed files with 99 additions and 73 deletions
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55
fiv-io.c
View File

@@ -2627,6 +2627,61 @@ fiv_io_save(cairo_surface_t *page, cairo_surface_t *frame, FivIoProfile target,
// --- Metadata ----------------------------------------------------------------
gboolean
fiv_io_orientation_is_sideways(FivIoOrientation orientation)
{
switch (orientation) {
case FivIoOrientation90:
case FivIoOrientationMirror90:
case FivIoOrientation270:
case FivIoOrientationMirror270:
return TRUE;
default:
return FALSE;
}
}
cairo_matrix_t
fiv_io_orientation_matrix(
FivIoOrientation orientation, double width, double height)
{
cairo_matrix_t matrix = {};
cairo_matrix_init_identity(&matrix);
switch (orientation) {
case FivIoOrientation90:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientation180:
cairo_matrix_scale(&matrix, -1, -1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientation270:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror0:
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientationMirror90:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientationMirror180:
cairo_matrix_scale(&matrix, +1, -1);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror270:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
default:
break;
}
return matrix;
}
FivIoOrientation
fiv_io_exif_orientation(const guint8 *tiff, gsize len)
{

8
fiv-io.h
View File

@@ -108,6 +108,14 @@ typedef enum _FivIoOrientation {
FivIoOrientation270 = 8
} FivIoOrientation;
/// Returns whether dimensions need to be swapped for rendering.
gboolean fiv_io_orientation_is_sideways(FivIoOrientation orientation);
/// Returns a rendering matrix for a surface. Dimensions need to be pre-swapped.
cairo_matrix_t fiv_io_orientation_matrix(
FivIoOrientation orientation, double width, double height);
/// Extracts the orientation field from Exif, if there's any.
FivIoOrientation fiv_io_exif_orientation(const guint8 *exif, gsize len);
/// Save metadata attached by this module in Exiv2 format.

36
fiv-thumbnail.c
View File

@@ -95,26 +95,33 @@ fiv_thumbnail_get_root(void)
// In principle similar to rescale_thumbnail() from fiv-browser.c.
static cairo_surface_t *
rescale_thumbnail(cairo_surface_t *thumbnail, double row_height)
adjust_thumbnail(cairo_surface_t *thumbnail, double row_height)
{
cairo_format_t format = cairo_image_surface_get_format(thumbnail);
int width = cairo_image_surface_get_width(thumbnail);
int height = cairo_image_surface_get_height(thumbnail);
int w = 0, width = cairo_image_surface_get_width(thumbnail);
int h = 0, height = cairo_image_surface_get_height(thumbnail);
// Hardcode orientation.
FivIoOrientation orientation = (uintptr_t) cairo_surface_get_user_data(
thumbnail, &fiv_io_key_orientation);
cairo_matrix_t matrix = fiv_io_orientation_is_sideways(orientation)
? fiv_io_orientation_matrix(orientation, (w = height), (h = width))
: fiv_io_orientation_matrix(orientation, (w = width), (h = height));
double scale_x = 1;
double scale_y = 1;
if (width > FIV_THUMBNAIL_WIDE_COEFFICIENT * height) {
scale_x = FIV_THUMBNAIL_WIDE_COEFFICIENT * row_height / width;
scale_y = round(scale_x * height) / height;
if (w > FIV_THUMBNAIL_WIDE_COEFFICIENT * h) {
scale_x = FIV_THUMBNAIL_WIDE_COEFFICIENT * row_height / w;
scale_y = round(scale_x * h) / h;
} else {
scale_y = row_height / height;
scale_x = round(scale_y * width) / width;
scale_y = row_height / h;
scale_x = round(scale_y * w) / w;
}
if (scale_x == 1 && scale_y == 1)
if (orientation <= FivIoOrientation0 && scale_x == 1 && scale_y == 1)
return cairo_surface_reference(thumbnail);
int projected_width = round(scale_x * width);
int projected_height = round(scale_y * height);
int projected_width = round(scale_x * w);
int projected_height = round(scale_y * h);
cairo_surface_t *scaled = cairo_image_surface_create(
(format == CAIRO_FORMAT_RGB24 || format == CAIRO_FORMAT_RGB30)
? CAIRO_FORMAT_RGB24
@@ -126,13 +133,14 @@ rescale_thumbnail(cairo_surface_t *thumbnail, double row_height)
cairo_set_source_surface(cr, thumbnail, 0, 0);
cairo_pattern_t *pattern = cairo_get_source(cr);
cairo_pattern_set_filter(pattern, CAIRO_FILTER_BEST);
// CAIRO_FILTER_BEST, for some reason, works bad with CAIRO_FORMAT_RGB30.
cairo_pattern_set_filter(pattern, CAIRO_FILTER_GOOD);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD);
cairo_pattern_set_matrix(pattern, &matrix);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint(cr);
cairo_destroy(cr);
mark_thumbnail_lq(scaled);
return scaled;
}
@@ -260,7 +268,7 @@ fiv_thumbnail_produce(GFile *target, FivThumbnailSize max_size, GError **error)
for (int use = max_size; use >= FIV_THUMBNAIL_SIZE_MIN; use--) {
cairo_surface_t *scaled =
rescale_thumbnail(surface, fiv_thumbnail_sizes[use].size);
adjust_thumbnail(surface, fiv_thumbnail_sizes[use].size);
gchar *path = g_strdup_printf("%s/wide-%s/%s.webp", thumbnails_dir,
fiv_thumbnail_sizes[use].thumbnail_spec_name, sum);
save_thumbnail(scaled, path, thum);

73
fiv-view.c
View File

@@ -55,9 +55,9 @@ struct _FivView {
G_DEFINE_TYPE(FivView, fiv_view, GTK_TYPE_WIDGET)
struct size {
typedef struct _Dimensions {
double width, height;
};
} Dimensions;
static FivIoOrientation view_left[9] = {
[FivIoOrientationUnknown] = FivIoOrientationUnknown,
@@ -201,11 +201,11 @@ fiv_view_set_property(
}
}
static struct size
static Dimensions
get_surface_dimensions(FivView *self)
{
if (!self->image)
return (struct size) {};
return (Dimensions) {};
cairo_rectangle_t extents = {};
switch (cairo_surface_get_type(self->page)) {
@@ -222,65 +222,20 @@ get_surface_dimensions(FivView *self)
g_assert_not_reached();
}
switch (self->orientation) {
case FivIoOrientation90:
case FivIoOrientationMirror90:
case FivIoOrientation270:
case FivIoOrientationMirror270:
return (struct size) {extents.height, extents.width};
default:
return (struct size) {extents.width, extents.height};
}
if (fiv_io_orientation_is_sideways(self->orientation))
return (Dimensions) {extents.height, extents.width};
return (Dimensions) {extents.width, extents.height};
}
static void
get_display_dimensions(FivView *self, int *width, int *height)
{
struct size surface_dimensions = get_surface_dimensions(self);
Dimensions surface_dimensions = get_surface_dimensions(self);
*width = ceil(surface_dimensions.width * self->scale);
*height = ceil(surface_dimensions.height * self->scale);
}
static cairo_matrix_t
get_orientation_matrix(FivIoOrientation o, double width, double height)
{
cairo_matrix_t matrix = {};
cairo_matrix_init_identity(&matrix);
switch (o) {
case FivIoOrientation90:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientation180:
cairo_matrix_scale(&matrix, -1, -1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientation270:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror0:
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientationMirror90:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientationMirror180:
cairo_matrix_scale(&matrix, +1, -1);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror270:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
default:
break;
}
return matrix;
}
static void
fiv_view_get_preferred_height(GtkWidget *widget, gint *minimum, gint *natural)
{
@@ -318,7 +273,7 @@ fiv_view_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
if (!self->image || !self->scale_to_fit)
return;
struct size surface_dimensions = get_surface_dimensions(self);
Dimensions surface_dimensions = get_surface_dimensions(self);
self->scale = 1;
if (ceil(surface_dimensions.width * self->scale) > allocation->width)
@@ -443,8 +398,8 @@ fiv_view_draw(GtkWidget *widget, cairo_t *cr)
if (h < allocation.height)
y = round((allocation.height - h) / 2.);
struct size surface_dimensions = get_surface_dimensions(self);
cairo_matrix_t matrix = get_orientation_matrix(
Dimensions surface_dimensions = get_surface_dimensions(self);
cairo_matrix_t matrix = fiv_io_orientation_matrix(
self->orientation, surface_dimensions.width, surface_dimensions.height);
cairo_translate(cr, x, y);
if (self->checkerboard) {
@@ -731,7 +686,7 @@ on_draw_page(G_GNUC_UNUSED GtkPrintOperation *operation,
{
// Any DPI will be wrong, unless we import that information from the image.
double scale = 1 / 96.;
struct size surface_dimensions = get_surface_dimensions(self);
Dimensions surface_dimensions = get_surface_dimensions(self);
double w = surface_dimensions.width * scale;
double h = surface_dimensions.height * scale;
@@ -743,7 +698,7 @@ on_draw_page(G_GNUC_UNUSED GtkPrintOperation *operation,
cairo_t *cr = gtk_print_context_get_cairo_context(context);
cairo_scale(cr, scale, scale);
cairo_set_source_surface(cr, self->frame, 0, 0);
cairo_matrix_t matrix = get_orientation_matrix(
cairo_matrix_t matrix = fiv_io_orientation_matrix(
self->orientation, surface_dimensions.width, surface_dimensions.height);
cairo_pattern_set_matrix(cairo_get_source(cr), &matrix);
cairo_paint(cr);