104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
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// Copyright 2019-Present LexLiu. All Rights Reserved.
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#include "LGUIEditorUtils.h"
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#include "CanvasItem.h"
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#include "CanvasTypes.h"
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#include "ImageUtils.h"
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#include "IImageWrapper.h"
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#include "IImageWrapperModule.h"
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#include "Misc/Paths.h"
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#include "Misc/FileHelper.h"
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#define LOCTEXT_NAMESPACE "LGUIEditorUtils"
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TMap<FString, UTexture2D*> LGUIEditorUtils::TexturePathToTextureMap;
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UTexture2D* LGUIEditorUtils::LoadTexture(const FString& TextureFullPath)
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{
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auto LoadSpriteIconTextureFromFile = [TextureFullPath]()
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{
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UTexture2D* Texture = nullptr;
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if (!FPaths::FileExists(*TextureFullPath))
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{
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return Texture;
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}
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TArray<uint8> CompressedData;
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if (!FFileHelper::LoadFileToArray(CompressedData, *TextureFullPath))
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{
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return Texture;
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}
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IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
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TSharedPtr<IImageWrapper> ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::PNG);
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if (ImageWrapper.IsValid() && ImageWrapper->SetCompressed(CompressedData.GetData(), CompressedData.Num()))
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{
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TArray<uint8> UncompressedRGBA;
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if (ImageWrapper->GetRaw(ERGBFormat::RGBA, 8, UncompressedRGBA))
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{
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Texture = UTexture2D::CreateTransient(ImageWrapper->GetWidth(), ImageWrapper->GetHeight(), PF_R8G8B8A8);
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if (Texture != nullptr)
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{
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void* TextureData = Texture->GetPlatformData()->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
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FMemory::Memcpy(TextureData, UncompressedRGBA.GetData(), UncompressedRGBA.Num());
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Texture->GetPlatformData()->Mips[0].BulkData.Unlock();
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Texture->UpdateResource();
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Texture->AddToRoot();
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}
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}
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}
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return Texture;
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};
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UTexture2D* SpriteIconTexture = nullptr;
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if (!TexturePathToTextureMap.Contains(TextureFullPath))
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{
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TexturePathToTextureMap.Add(TextureFullPath, LoadSpriteIconTextureFromFile());
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}
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return TexturePathToTextureMap[TextureFullPath];
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}
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void LGUIEditorUtils::DrawThumbnailIcon(const FString& TextureFullPath, int32 X, int32 Y, uint32 Width, uint32 Height, FCanvas* Canvas)
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{
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auto SpriteIconTexture = LoadTexture(TextureFullPath);
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if (SpriteIconTexture != nullptr && SpriteIconTexture->GetResource() != nullptr)
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{
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const float Scale = 0.3f;
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float triangleWidth = Width * Scale, triangleHeight = Height * Scale;
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float textureWidth = SpriteIconTexture->GetSurfaceWidth();
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float textureHeight = SpriteIconTexture->GetSurfaceHeight();
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float xOffset = 0, yOffset = 0;
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if (textureWidth > textureHeight)
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{
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triangleHeight = Height * textureHeight / textureWidth;
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yOffset = (Height - triangleHeight) * 0.5f;
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}
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else if (textureWidth < textureHeight)
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{
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triangleWidth = Width * textureWidth / textureHeight;
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xOffset = (Width - triangleWidth) * 0.5f;
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}
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TArray<FCanvasUVTri> Triangles;
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const FLinearColor SpriteColor(FLinearColor::White);
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FCanvasUVTri* Triangle1 = new (Triangles) FCanvasUVTri();
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Triangle1->V0_Pos = FVector2D(X + triangleWidth + xOffset, Y + yOffset); Triangle1->V0_UV = FVector2D(1.0f, 0); Triangle1->V0_Color = SpriteColor;
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Triangle1->V1_Pos = FVector2D(X + xOffset, Y + yOffset); Triangle1->V1_UV = FVector2D(0, 0); Triangle1->V1_Color = SpriteColor;
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Triangle1->V2_Pos = FVector2D(X + xOffset, Y + triangleHeight + yOffset); Triangle1->V2_UV = FVector2D(0, 1.0f); Triangle1->V2_Color = SpriteColor;
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FCanvasUVTri* Triangle2 = new (Triangles) FCanvasUVTri();
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Triangle2->V0_Pos = FVector2D(X + triangleWidth + xOffset, Y + yOffset); Triangle2->V0_UV = FVector2D(1.0f, 0); Triangle2->V0_Color = SpriteColor;
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Triangle2->V1_Pos = FVector2D(X + xOffset, Y + triangleHeight + yOffset); Triangle2->V1_UV = FVector2D(0, 1.0f); Triangle2->V1_Color = SpriteColor;
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Triangle2->V2_Pos = FVector2D(X + triangleWidth + xOffset, Y + triangleHeight + yOffset); Triangle2->V2_UV = FVector2D(1.0f, 1.0f); Triangle2->V2_Color = SpriteColor;
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FCanvasTriangleItem CanvasTriangle(Triangles, SpriteIconTexture->GetResource());
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CanvasTriangle.BlendMode = ESimpleElementBlendMode::SE_BLEND_Translucent;
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Canvas->DrawItem(CanvasTriangle);
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}
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}
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#undef LOCTEXT_NAMESPACE
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