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render panel's render target in the Draw method

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Ell 2022-03-26 21:13:05 +01:00
parent 6a3c797eba
commit 94dec34470
4 changed files with 25 additions and 22 deletions
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3
CHANGELOG.md
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@ -73,7 +73,8 @@ Fixes
Removals
- Marked StyleProp equality members as obsolete
- Marked BeginDelegate and BeginImpl as obsolete
- Marked Element.BeginDelegate and Element.BeginImpl as obsolete
- Marked Element.DrawEarly and UiSystem.DrawEarly as obsolete
### MLEM.Extended
Improvements

5
MLEM.Ui/Elements/Element.cs
View file

@ -185,7 +185,7 @@ namespace MLEM.Ui.Elements {
/// Note that, when this is non-null, a new <see cref="SpriteBatch.Begin"/> call is used for this element.
/// </summary>
#pragma warning disable CS0618
[Obsolete("BeginImpl is deprecated. You can create a custom element class and override DrawEarly or Draw instead.")]
[Obsolete("BeginImpl is deprecated. You can create a custom element class and override Draw instead.")]
public BeginDelegate BeginImpl;
#pragma warning restore CS0618
/// <summary>
@ -990,6 +990,7 @@ namespace MLEM.Ui.Elements {
/// <param name="effect">The effect that is used for drawing</param>
/// <param name="depthStencilState">The depth stencil state that is used for drawing</param>
/// <param name="matrix">The transformation matrix that is used for drawing</param>
[Obsolete("DrawEarly is deprecated. For custom implementations, see Panel.Draw for how to replace this method.")]
public virtual void DrawEarly(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, DepthStencilState depthStencilState, Effect effect, Matrix matrix) {
foreach (var child in this.GetRelevantChildren()) {
if (!child.IsHidden)
@ -1168,7 +1169,7 @@ namespace MLEM.Ui.Elements {
/// <param name="effect">The effect used for drawing</param>
/// <param name="depthStencilState">The depth stencil state used for drawing</param>
/// <param name="matrix">The transform matrix used for drawing</param>
[Obsolete("BeginDelegate is deprecated. You can create a custom element class and override DrawEarly or Draw instead.")]
[Obsolete("BeginDelegate is deprecated. You can create a custom element class and override Draw instead.")]
public delegate void BeginDelegate(Element element, GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, DepthStencilState depthStencilState, Effect effect, Matrix matrix);
}

35
MLEM.Ui/Elements/Panel.cs
View file

@ -13,7 +13,6 @@ namespace MLEM.Ui.Elements {
/// A panel element to be used inside of a <see cref="UiSystem"/>.
/// The panel is a complex element that displays a box as a background to all of its child elements.
/// Additionally, a panel can be set to <see cref="scrollOverflow"/> on construction, which causes all elements that don't fit into the panel to be hidden until scrolled to using a <see cref="ScrollBar"/>.
/// As this behavior is accomplished using a <see cref="RenderTarget2D"/>, scrolling panels need to have their <see cref="DrawEarly"/> methods called using <see cref="UiSystem.DrawEarly"/>.
/// </summary>
public class Panel : Element {
@ -169,22 +168,13 @@ namespace MLEM.Ui.Elements {
/// <inheritdoc />
public override void Draw(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, DepthStencilState depthStencilState, Effect effect, Matrix matrix) {
if (this.Texture.HasValue())
batch.Draw(this.Texture, this.DisplayArea, this.DrawColor.OrDefault(Color.White) * alpha, this.Scale);
// if we handle overflow, draw using the render target in DrawUnbound
if (!this.scrollOverflow || this.renderTarget == null) {
base.Draw(time, batch, alpha, blendState, samplerState, depthStencilState, effect, matrix);
} else {
// draw the actual render target (don't apply the alpha here because it's already drawn onto with alpha)
batch.Draw(this.renderTarget, this.GetRenderTargetArea(), Color.White);
}
}
/// <inheritdoc />
public override void DrawEarly(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, DepthStencilState depthStencilState, Effect effect, Matrix matrix) {
this.UpdateAreaIfDirty();
// draw children onto the render target if we have one
if (this.scrollOverflow && this.renderTarget != null) {
// draw children onto the render target
this.UpdateAreaIfDirty();
batch.End();
// force render target usage to preserve so that previous content isn't cleared
var lastUsage = batch.GraphicsDevice.PresentationParameters.RenderTargetUsage;
batch.GraphicsDevice.PresentationParameters.RenderTargetUsage = RenderTargetUsage.PreserveContents;
using (batch.GraphicsDevice.WithRenderTarget(this.renderTarget)) {
batch.GraphicsDevice.Clear(Color.Transparent);
// offset children by the render target's location
@ -195,8 +185,19 @@ namespace MLEM.Ui.Elements {
base.Draw(time, batch, alpha, blendState, samplerState, depthStencilState, effect, trans);
batch.End();
}
batch.GraphicsDevice.PresentationParameters.RenderTargetUsage = lastUsage;
batch.Begin(SpriteSortMode.Deferred, blendState, samplerState, depthStencilState, null, effect, matrix);
}
if (this.Texture.HasValue())
batch.Draw(this.Texture, this.DisplayArea, this.DrawColor.OrDefault(Color.White) * alpha, this.Scale);
// if we handle overflow, draw using the render target in DrawUnbound
if (!this.scrollOverflow || this.renderTarget == null) {
base.Draw(time, batch, alpha, blendState, samplerState, depthStencilState, effect, matrix);
} else {
// draw the actual render target (don't apply the alpha here because it's already drawn onto with alpha)
batch.Draw(this.renderTarget, this.GetRenderTargetArea(), Color.White);
}
base.DrawEarly(time, batch, alpha, blendState, samplerState, depthStencilState, effect, matrix);
}
/// <inheritdoc />

4
MLEM.Ui/UiSystem.cs
View file

@ -105,7 +105,7 @@ namespace MLEM.Ui {
public UiControls Controls;
/// <summary>
/// The update and rendering statistics to be used for runtime debugging and profiling.
/// The metrics are reset accordingly every frame: <see cref="UiMetrics.ResetUpdates"/> is called at the start of <see cref="Update"/>, and <see cref="UiMetrics.ResetDraws"/> is called at the start of <see cref="DrawEarly"/>, or at the start of <see cref="Draw"/> if <see cref="DrawEarly"/> was not called.
/// The metrics are reset accordingly every frame: <see cref="UiMetrics.ResetUpdates"/> is called at the start of <see cref="Update"/>, and <see cref="UiMetrics.ResetDraws"/> is called at the start of <see cref="Draw"/>.
/// </summary>
public UiMetrics Metrics;
@ -268,6 +268,7 @@ namespace MLEM.Ui {
/// </summary>
/// <param name="time">The game's time</param>
/// <param name="batch">The sprite batch to use for drawing</param>
[Obsolete("DrawEarly is deprecated. Calling it is not required anymore, and there is no replacement.")]
public void DrawEarly(GameTime time, SpriteBatch batch) {
this.Metrics.ResetDraws();
this.stopwatch.Restart();
@ -284,7 +285,6 @@ namespace MLEM.Ui {
/// <summary>
/// Draws any <see cref="Element"/>s onto the screen.
/// Note that, when using <see cref="Panel"/>s with a scroll bar, <see cref="DrawEarly"/> needs to be called as well.
/// </summary>
/// <param name="time">The game's time</param>
/// <param name="batch">The sprite batch to use for drawing</param>