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add fillHeight option to setBackgroundImage

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This commit is contained in:
Nick Fisher
2023-09-15 13:00:58 +08:00
parent 3312b88f0a
commit f72ffd6c6a
5 changed files with 23 additions and 8 deletions
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15
ios/src/FilamentViewer.cpp
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@@ -426,7 +426,7 @@ void FilamentViewer::clearBackgroundImage() {
}
}
void FilamentViewer::setBackgroundImage(const char *resourcePath) {
void FilamentViewer::setBackgroundImage(const char *resourcePath, bool fillHeight) {
string resourcePathString(resourcePath);
@@ -440,7 +440,18 @@ void FilamentViewer::setBackgroundImage(const char *resourcePath) {
// TODO - implement stretch/etc
const Viewport& vp = _view->getViewport();
Log("Image width %d height %d vp width %d height %d", _imageWidth, _imageHeight, vp.width, vp.height);
_imageScale = mat4f { float(vp.width) / float(_imageWidth) , 0.0f, 0.0f, 0.0f, 0.0f, float(vp.height) / float(_imageHeight), 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f };
float xScale = float(vp.width) / float(_imageWidth);
float yScale;
if(fillHeight) {
yScale = 1.0f;
} else {
yScale = float(vp.height) / float(_imageHeight);
}
_imageScale = mat4f { xScale , 0.0f, 0.0f, 0.0f, 0.0f, yScale , 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f };
_imageMaterial->setDefaultParameter("transform", _imageScale);
_imageMaterial->setDefaultParameter("image", _imageTexture, _imageSampler);