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rewrite image caching logic

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GenevensiS
2025-12-14 05:33:31 +01:00
parent aa0791686e
commit 66016f381c
4 changed files with 41 additions and 31 deletions
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src/script/image.cpp
+29 -24
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@@ -104,42 +104,47 @@ void CachedScriptableImage::generateCached(const GeneratedImage::Options& option
ImageCombine combine_i = value->combine();
if (combine_i != COMBINE_DEFAULT) *combine = combine_i;
*size = cached_size;
// does the size match?
bool w_ok = cached_size.width == options.width,
h_ok = cached_size.height == options.height;
// do the options match?
Radians relative_rotation = options.angle + rad360 - cached_options_angle;
bool ok = almost_equal(cached_options_size.width, options.width) &&
almost_equal(cached_options_size.height, options.height) &&
almost_equal(cached_options_zoom, options.zoom) &&
cached_options_preserve_aspect == options.preserve_aspect &&
cached_options_saturate == options.saturate &&
is_straight(relative_rotation); // we only need an {0,90,180,270} degree rotation compared to the cached one, this doesn't reduce image quality
// image or bitmap?
if (*combine <= COMBINE_NORMAL) {
// bitmap
if (cached_b.Ok() && options.angle == cached_angle) {
if ((w_ok && h_ok) || (options.preserve_aspect == ASPECT_FIT && (w_ok || h_ok))) { // only one dimension has to fit when fitting
// cached, we are done
*bitmap = cached_b;
return;
}
if (cached_b.Ok() && ok && almost_equal(cached_options_angle, options.angle)) {
// cached, we are done
*bitmap = cached_b;
return;
}
} else {
// image
Radians relative_rotation = options.angle + rad360 - cached_angle;
if (cached_i.Ok() && is_straight(relative_rotation)) {
// we need only an {0,90,180,270} degree rotation compared to the cached one, this doesn't reduce image quality
if ((w_ok && h_ok) || (options.preserve_aspect == ASPECT_FIT && (w_ok || h_ok))) { // only one dimension has to fit when fitting
if (options.angle != cached_angle) {
// rotate cached image
cached_i = rotate_image(cached_i, relative_rotation);
cached_angle = options.angle;
}
*image = cached_i;
return;
if (cached_i.Ok() && ok) {
if (!almost_equal(cached_options_angle, options.angle)) {
// rotate cached image
cached_i = rotate_image(cached_i, relative_rotation);
cached_options_angle = options.angle;
}
*image = cached_i;
return;
}
}
}
// store the options as they were asked for
cached_options_size = RealSize(options.width, options.height);
cached_options_zoom = options.zoom;
cached_options_preserve_aspect = options.preserve_aspect;
cached_options_saturate = options.saturate;
cached_options_angle = options.angle;
// hack(part1): temporarily set angle to 0, do actual rotation after applying mask
Radians a = options.angle;
const_cast<GeneratedImage::Options&>(options).angle = 0;
// generate
cached_i = generate(options);
assert(cached_i.Ok());
const_cast<GeneratedImage::Options&>(options).angle = cached_angle = a;
const_cast<GeneratedImage::Options&>(options).angle = cached_options_angle;
// store the size as it actually is (may have been changed by conform_image() when we generated the image)
*size = cached_size = RealSize(options.width, options.height);
if (mask) {
// apply mask
@@ -149,7 +154,7 @@ void CachedScriptableImage::generateCached(const GeneratedImage::Options& option
mask_opts.angle = 0;
mask->get(mask_opts).setAlpha(cached_i);
}
if (options.angle != 0) {
if (!almost_equal(options.angle, 0.0)) {
// hack(part2) do the actual rotation now
cached_i = rotate_image(cached_i, options.angle);
}