282 lines
11 KiB
C#
282 lines
11 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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namespace HK.FUJIFILM
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{
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public static class RawImageScaler
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{
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/// <summary>
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/// 将Texture2D赋值给RawImage并确保等比缩放，保持在RawImage最大范围内
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/// </summary>
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/// <param name="rawImage">目标RawImage组件</param>
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/// <param name="texture">要显示的Texture2D</param>
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/// <param name="maxWidth">最大宽度限制（若为0则使用RawImage的当前宽度）</param>
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/// <param name="maxHeight">最大高度限制（若为0则使用RawImage的当前高度）</param>
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public static void SetTextureWithAspectRatio(RawImage rawImage, Texture2D texture, float maxWidth = 0,
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float maxHeight = 0)
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{
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if (rawImage == null || texture == null)
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{
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Debug.LogError("RawImage或Texture2D不能为空");
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return;
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}
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// 赋值纹理
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rawImage.texture = texture;
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// 获取纹理原始宽高
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float textureWidth = texture.width;
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float textureHeight = texture.height;
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// 如果未指定最大宽高，使用RawImage当前的尺寸作为限制
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float limitWidth = maxWidth > 0 ? maxWidth : rawImage.rectTransform.rect.width;
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float limitHeight = maxHeight > 0 ? maxHeight : rawImage.rectTransform.rect.height;
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// 计算宽高比例
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float textureAspect = textureWidth / textureHeight;
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float limitAspect = limitWidth / limitHeight;
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// 计算缩放后的尺寸（保持比例并适应限制范围）
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float scaledWidth, scaledHeight;
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if (textureAspect > limitAspect)
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{
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// 纹理更宽，按宽度限制缩放
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scaledWidth = limitWidth;
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scaledHeight = scaledWidth / textureAspect;
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}
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else
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{
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// 纹理更高或比例相同，按高度限制缩放
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scaledHeight = limitHeight;
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scaledWidth = scaledHeight * textureAspect;
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}
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// 应用缩放后的尺寸
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rawImage.rectTransform.sizeDelta = new Vector2(scaledWidth, scaledHeight);
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// 可选：居中显示
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rawImage.rectTransform.anchorMin = new Vector2(0.5f, 0.5f);
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rawImage.rectTransform.anchorMax = new Vector2(0.5f, 0.5f);
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rawImage.rectTransform.pivot = new Vector2(0.5f, 0.5f);
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rawImage.rectTransform.anchoredPosition = Vector2.zero;
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}
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}
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public static class ImageScaler
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{
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/// <summary>
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/// 将Image等比缩放到不超过指定的最大尺寸（宽和高中较大的值不超过maxSize）
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/// </summary>
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/// <param name="image">需要缩放的Image组件</param>
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/// <param name="maxSize">宽和高中较大值的最大限制</param>
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/// <param name="keepOriginalIfSmaller">如果原图比限制小，是否保持原图大小</param>
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public static void ScaleImageWithSize(Image image, float maxSize, bool keepOriginalIfSmaller = false)
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{
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if (image == null)
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{
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Debug.LogError("Image组件不能为空！");
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return;
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}
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// 获取原始尺寸
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float originalWidth, originalHeight;
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if (image.sprite != null)
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{
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// 使用Sprite的原始尺寸
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originalWidth = image.sprite.rect.width;
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originalHeight = image.sprite.rect.height;
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}
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else
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{
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// 没有Sprite时使用当前RectTransform的尺寸
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originalWidth = image.rectTransform.rect.width;
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originalHeight = image.rectTransform.rect.height;
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}
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// 计算缩放比例
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float scaleRatio = CalculateScaleRatio(originalWidth, originalHeight, maxSize, keepOriginalIfSmaller);
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// 应用缩放后的尺寸
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image.rectTransform.sizeDelta = new Vector2(
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originalWidth,
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originalHeight
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);
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// image.rectTransform.sizeDelta = new Vector2(
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// originalWidth * scaleRatio,
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// originalHeight * scaleRatio
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// );
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}
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public static void ScaleImageWithMaxSize(Image image, float maxSize, bool keepOriginalIfSmaller = false)
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{
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if (image == null)
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{
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Debug.LogError("Image组件不能为空！");
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return;
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}
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// 获取原始尺寸
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float originalWidth, originalHeight;
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if (image.sprite != null)
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{
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// 使用Sprite的原始尺寸
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originalWidth = image.sprite.rect.width;
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originalHeight = image.sprite.rect.height;
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}
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else
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{
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// 没有Sprite时使用当前RectTransform的尺寸
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originalWidth = image.rectTransform.rect.width;
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originalHeight = image.rectTransform.rect.height;
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}
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// 计算缩放比例
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float scaleRatio = CalculateScaleRatio(originalWidth, originalHeight, maxSize, keepOriginalIfSmaller);
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// 应用缩放后的尺寸
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image.rectTransform.sizeDelta = new Vector2(
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originalWidth * scaleRatio,
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originalHeight * scaleRatio
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);
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}
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/// <summary>
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/// 计算缩放比例
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/// </summary>
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private static float CalculateScaleRatio(float originalWidth, float originalHeight, float maxSize,
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bool keepOriginalIfSmaller)
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{
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// 找到原始宽高中的较大值
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float maxOriginal = Mathf.Max(originalWidth, originalHeight);
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// 如果原图的最大边小于等于限制值，且需要保持原图大小，则不缩放
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if (maxOriginal <= maxSize && keepOriginalIfSmaller)
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{
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return 1f; // 不缩放
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}
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// 计算缩放比例（让最大边刚好等于maxSize）
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return maxSize / maxOriginal;
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}
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/// <summary>
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/// 保持Image的sizeDelta为原始图片尺寸，仅通过修改scale来限制最大显示大小
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/// </summary>
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/// <param name="image">目标Image组件</param>
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/// <param name="maxSize">最大显示尺寸（图片的宽或高中较大者不会超过此值）</param>
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/// <param name="keepOriginalIfSmaller">如果原始尺寸小于maxSize，是否保持原始大小</param>
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public static void ScaleImageWithMaxSize_Scale(Image image, float maxSize, bool keepOriginalIfSmaller = false)
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{
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if (image == null)
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{
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Debug.LogError("Image组件不能为空！");
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return;
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}
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// 获取原始图片尺寸（像素尺寸）
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float originalWidth, originalHeight;
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if (image.sprite != null)
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{
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// 使用Sprite的原始像素尺寸
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originalWidth = image.sprite.rect.width;
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originalHeight = image.sprite.rect.height;
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}
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else
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{
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// 没有Sprite时使用当前RectTransform的尺寸作为原始尺寸
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originalWidth = image.rectTransform.rect.width;
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originalHeight = image.rectTransform.rect.height;
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}
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// 将sizeDelta设置为原始图片尺寸（保持像素尺寸不变）
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image.rectTransform.sizeDelta = new Vector2(originalWidth, originalHeight);
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// 计算缩放比例
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float scaleRatio = CalculateScaleRatio_Scale(originalWidth, originalHeight, maxSize, keepOriginalIfSmaller);
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// 仅修改scale来限制最大显示大小
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image.rectTransform.localScale = Vector3.one * scaleRatio;
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}
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/// <summary>
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/// 计算缩放比例
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/// </summary>
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private static float CalculateScaleRatio_Scale(float width, float height, float maxSize,
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bool keepOriginalIfSmaller)
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{
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if (width <= 0 || height <= 0) return 1f;
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// 计算原始尺寸中较大的一边
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float maxDimension = Mathf.Max(width, height);
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// 如果原始尺寸小于maxSize且需要保持原始大小，则不缩放
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if (maxDimension <= maxSize && keepOriginalIfSmaller)
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{
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return 1f;
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}
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// 计算缩放比例（确保最大边不超过maxSize）
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return maxSize / maxDimension;
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}
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public static void ScaleImageWithMinSize(Image image, float minSize, bool keepOriginalIfLarger = false)
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{
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Debug.Log(minSize);
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if (image == null)
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{
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Debug.LogError("Image组件不能为空！");
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return;
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}
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// 获取原始图片尺寸（像素尺寸）
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float originalWidth, originalHeight;
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if (image.sprite != null)
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{
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// 使用Sprite的原始像素尺寸
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originalWidth = image.sprite.rect.width;
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originalHeight = image.sprite.rect.height;
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}
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else
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{
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// 没有Sprite时使用当前RectTransform的尺寸作为原始尺寸
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originalWidth = image.rectTransform.rect.width;
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originalHeight = image.rectTransform.rect.height;
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}
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// 将sizeDelta设置为原始图片尺寸（保持像素尺寸不变）
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image.rectTransform.sizeDelta = new Vector2(originalWidth, originalHeight);
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// 计算缩放比例
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float scaleRatio = CalculateScaleRatio_Min(originalWidth, originalHeight, minSize, keepOriginalIfLarger);
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// 应用缩放比例
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image.rectTransform.localScale = Vector3.one * scaleRatio;
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}
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/// <summary>
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/// 计算缩放到最小尺寸的比例
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/// </summary>
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private static float CalculateScaleRatio_Min(float width, float height, float minSize,
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bool keepOriginalIfLarger)
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{
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if (width <= 0 || height <= 0) return 1f;
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// 计算原始尺寸中较小的一边
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float minDimension = Mathf.Min(width, height);
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// 如果原始尺寸大于minSize且需要保持原始大小，则不缩放
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if (minDimension >= minSize && keepOriginalIfLarger)
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{
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return 1f;
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}
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// 计算缩放比例（确保最小边不小于minSize）
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return minSize / minDimension;
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}
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}
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} |