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implemented more image related functions

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@59 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2006-10-29 22:13:11 +00:00
parent f46b0b6b7b
commit 601af4c778
11 changed files with 377 additions and 33 deletions
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src/script/image.cpp
+56 -1
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@@ -56,11 +56,62 @@ bool script_image_up_to_date(const ScriptValueP& value) {
}
}
// ----------------------------------------------------------------------------- : ScriptableImage
ScriptImageP ScriptableImage::generate(Context& ctx) const {
try {
ScriptImageP img = to_script_image(script.invoke(ctx));
return img;
} catch (Error e) {
// loading images can fail
// it is likely we are inside a paint function or outside the main thread, handle error later
handle_error(e, false, false);
return new_intrusive1<ScriptImage>(Image(1,1));
}
}
ScriptImageP ScriptableImage::generate(Context& ctx, UInt width, UInt height, PreserveAspect preserve_aspect, bool saturate) const {
ScriptImageP image = generate(ctx);
if (!image->image.Ok()) {
// return an image so we don't fail
image->image = Image(1,1);
}
UInt iw = image->image.GetWidth(), ih = image->image.GetHeight();
if ((iw == width && ih == height) || width == 0) {
// already the right size
} else if (preserve_aspect == ASPECT_FIT) {
// determine actual size of resulting image
UInt w, h;
if (iw * height > ih * width) { // too much height requested
w = width;
h = width * ih / iw;
} else {
w = height * iw / ih;
h = height;
}
Image resampled_image(w, h, false);
resample(image->image, resampled_image);
image->image = resampled_image;
} else {
Image resampled_image(width, height, false);
if (preserve_aspect == ASPECT_BORDER && (width < height * 3) && (height < width * 3)) {
// preserve the aspect ratio if there is not too much difference
resample_preserve_aspect(image->image, resampled_image);
} else {
resample(image->image, resampled_image);
}
image->image = resampled_image;
}
if (saturate) {
::saturate(image->image, 40);
}
return image;
}
ScriptImageP ScriptableImage::update(Context& ctx, UInt width, UInt height, PreserveAspect preserve_aspect, bool saturate) {
// up to date?
if (!cache || (UInt)cache->image.GetWidth() != width || (UInt)cache->image.GetHeight() == height) {
if (!cache || (UInt)cache->image.GetWidth() != width || (UInt)cache->image.GetHeight() == height || !upToDate(ctx, last_update)) {
// cache must be updated
cache = generate(ctx, width, height, preserve_aspect, saturate);
last_update.update();
@@ -68,6 +119,10 @@ ScriptImageP ScriptableImage::update(Context& ctx, UInt width, UInt height, Pres
return cache;
}
bool ScriptableImage::upToDate(Context& ctx, Age age) const {
WITH_DYNAMIC_ARG(last_update_age, age.get());
return (int)*script.invoke(ctx);
}
// ----------------------------------------------------------------------------- : Reflection