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[Fix] (MG_Impl): handle Retina drawable resize on macOS

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This commit is contained in:
swung0x48
2026-06-28 23:22:33 +08:00
parent 65ff056b2e
commit 3fc6357f28
7 changed files with 142 additions and 43 deletions
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MobileGL/MG_Impl/NSOpenGLImpl/NSOpenGLImpl.cpp
+73 -28
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@@ -77,6 +77,12 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
}
}
void SendVoidCGFloat(id receiver, const char* selector, CGFloat value) {
if (receiver) {
ObjcMsgSend<void (*)(id, SEL, CGFloat)>()(receiver, sel_registerName(selector), value);
}
}
bool SendBool(id receiver, const char* selector) {
return receiver ? ObjcMsgSend<bool (*)(id, SEL)>()(receiver, sel_registerName(selector)) : false;
}
@@ -88,6 +94,13 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
return ObjcMsgSend<CGRect (*)(id, SEL)>()(receiver, sel_registerName(selector));
}
CGRect SendCGRectCGRect(id receiver, const char* selector, CGRect value) {
if (!receiver) {
return {};
}
return ObjcMsgSend<CGRect (*)(id, SEL, CGRect)>()(receiver, sel_registerName(selector), value);
}
CGFloat SendCGFloat(id receiver, const char* selector) {
return receiver ? ObjcMsgSend<CGFloat (*)(id, SEL)>()(receiver, sel_registerName(selector)) : 1.0;
}
@@ -200,7 +213,48 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
return self;
}
id CreateMetalLayerForView(id view) {
struct DrawableGeometry {
CGRect Bounds = {};
CGSize DrawableSize = {1.0, 1.0};
CGFloat Scale = 1.0;
};
DrawableGeometry GetDrawableGeometry(id view) {
DrawableGeometry geometry;
geometry.Bounds = SendCGRect(view, "bounds");
if (geometry.Bounds.size.width <= 0.0 || geometry.Bounds.size.height <= 0.0) {
geometry.Bounds.size.width = 1.0;
geometry.Bounds.size.height = 1.0;
}
id window = SendId(view, "window");
if (window) {
geometry.Scale = SendCGFloat(window, "backingScaleFactor");
}
if (geometry.Scale <= 0.0) {
geometry.Scale = 1.0;
}
CGRect backingBounds = SendCGRectCGRect(view, "convertRectToBacking:", geometry.Bounds);
if (backingBounds.size.width > 0.0 && backingBounds.size.height > 0.0) {
geometry.DrawableSize = backingBounds.size;
} else {
geometry.DrawableSize = {geometry.Bounds.size.width * geometry.Scale,
geometry.Bounds.size.height * geometry.Scale};
}
geometry.DrawableSize.width = std::max<CGFloat>(std::round(geometry.DrawableSize.width), 1.0);
geometry.DrawableSize.height = std::max<CGFloat>(std::round(geometry.DrawableSize.height), 1.0);
return geometry;
}
void ConfigureMetalLayerForView(id layer, id view, const DrawableGeometry& geometry) {
SendVoidCGRect(layer, "setFrame:", geometry.Bounds);
SendVoidCGFloat(layer, "setContentsScale:", geometry.Scale);
SendVoidCGSize(layer, "setDrawableSize:", geometry.DrawableSize);
SendVoidBool(layer, "setNeedsDisplayOnBoundsChange:", true);
}
id CreateMetalLayerForView(id view, DrawableGeometry* outGeometry) {
if (!view) {
return nil;
}
@@ -216,23 +270,12 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
return nil;
}
CGRect bounds = SendCGRect(view, "bounds");
if (bounds.size.width <= 0.0 || bounds.size.height <= 0.0) {
bounds.size.width = 1.0;
bounds.size.height = 1.0;
}
CGFloat scale = 1.0;
id window = SendId(view, "window");
if (window) {
scale = SendCGFloat(window, "backingScaleFactor");
}
if (scale <= 0.0) {
scale = 1.0;
}
CGSize drawableSize = {bounds.size.width * scale, bounds.size.height * scale};
SendVoidCGRect(layer, "setFrame:", bounds);
SendVoidCGSize(layer, "setDrawableSize:", drawableSize);
const auto geometry = GetDrawableGeometry(view);
ConfigureMetalLayerForView(layer, view, geometry);
SendVoidId(view, "setLayer:", layer);
if (outGeometry) {
*outGeometry = geometry;
}
return layer;
}
@@ -247,13 +290,16 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
SetAssoc(self, &kContextLayerKey, nil, kAssociationRetain);
return;
}
id layer = CreateMetalLayerForView(view);
DrawableGeometry geometry;
id layer = CreateMetalLayerForView(view, &geometry);
if (!layer) {
return;
}
SetAssoc(self, &kContextViewKey, view, kAssociationAssign);
SetAssoc(self, &kContextLayerKey, layer, kAssociationRetain);
const auto error = CGLImpl::AttachDrawable(context, view, layer);
const auto error = CGLImpl::AttachDrawable(context, view, layer,
static_cast<GLint>(geometry.DrawableSize.width),
static_cast<GLint>(geometry.DrawableSize.height));
if (error != kCGLNoError) {
MGLOG_E("NSOpenGLImpl: failed to attach drawable: %s", CGLImpl::ErrorString(error));
}
@@ -316,16 +362,15 @@ namespace MobileGL::MG_Impl::NSOpenGLImpl {
ContextSetView(self, nullptr, view);
return;
}
CGRect bounds = SendCGRect(view, "bounds");
CGFloat scale = 1.0;
if (id window = SendId(view, "window")) {
scale = SendCGFloat(window, "backingScaleFactor");
const auto geometry = GetDrawableGeometry(view);
ConfigureMetalLayerForView(layer, view, geometry);
const auto error = CGLImpl::AttachDrawable(context, view, layer,
static_cast<GLint>(geometry.DrawableSize.width),
static_cast<GLint>(geometry.DrawableSize.height));
if (error != kCGLNoError) {
MGLOG_E("NSOpenGLImpl: update failed to attach drawable: %s", CGLImpl::ErrorString(error));
return;
}
if (scale <= 0.0) {
scale = 1.0;
}
SendVoidCGRect(layer, "setFrame:", bounds);
SendVoidCGSize(layer, "setDrawableSize:", {bounds.size.width * scale, bounds.size.height * scale});
CGLImpl::UpdateContext(context);
}