{"id":109,"date":"2020-11-13T11:48:18","date_gmt":"2020-11-13T02:48:18","guid":{"rendered":"http:\/\/strangechu.com\/?p=109"},"modified":"2020-11-13T11:49:48","modified_gmt":"2020-11-13T02:49:48","slug":"ue4-%e5%b0%87rendertarget%e8%bd%89%e6%88%90color%e9%99%a3%e5%88%97%e4%bb%a5%e5%84%b2%e5%ad%98%e8%87%b3savedata","status":"publish","type":"post","link":"https:\/\/strangechu.com\/?p=109","title":{"rendered":"[UE4]  \u5c07RenderTarget\u8f49\u6210Color\u9663\u5217\u4ee5\u5132\u5b58\u81f3SaveData"},"content":{"rendered":"\n<p>\u6709\u6642\u6211\u5011\u6703\u9700\u8981\u5132\u5b58RenderTarget\u7684Pixel\u8cc7\u8a0a\u5728\u904a\u6232\u5b58\u6a94\uff0c\u5982\u5730\u5716\u63a2\u7d22\u7bc4\u570d\u3001\u62cd\u7167\u7167\u7247\u7b49\u7b49\u3002\u7136\u800cUE4\u7684SaveData\u4e0d\u652f\u63f4\u76f4\u63a5\u5132\u5b58RenderTarget\uff0c\u56e0\u6b64\u9700\u8981\u8f49\u5316\u6210\u53ef\u4ee5\u5132\u5b58\u7684\u683c\u5f0f\u3002\u9019\u908a\u6211\u5011\u4f7f\u7528FColor\u7684\u9663\u5217\u5132\u5b58\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5132\u5b58\uff1aRenderTarget\u81f3TArray&lt;FColor><\/h3>\n\n\n\n<p>\u4f7f\u7528ReadPixels<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TArray&lt;FColor> OutputBuffer;\nUTextureRenderTarget2D* RenderTarget = GetSourceFogRenderTarget();\n     FTextureRenderTarget2DResource* TextureResource = (FTextureRenderTarget2DResource*)RenderTarget->GameThread_GetRenderTargetResource();\n\nTextureResource->ReadPixels(OutputBuffer);<\/code><\/pre>\n\n\n\n<p>\u4e4b\u5f8c\u5c07OutputBuffer\u4ee5\u4e00\u822c\u9663\u5217\u5132\u5b58\u5373\u53ef\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8b80\u53d6\uff1aTArray&lt;FColor>\u81f3RenderTarget<\/h3>\n\n\n\n<p>\u900f\u904eCanvas\u5c07Pixel\u8cc7\u8a0a\u756b\u56deRenderTarget<br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TArray&lt;FColor> InputBuffer;\nUTextureRenderTarget2D* RenderTarget = GetSourceFogRenderTarget();\nUCanvas* Canvas;\nFVector2D Size;\nFDrawToRenderTargetContext RenderContext;\nUKismetRenderingLibrary::BeginDrawCanvasToRenderTarget(this, RenderTarget, Canvas, Size, RenderContext);\nif (Canvas)\n\t{\n\t\/\/ \u8b80\u53d6\u7684PixelData\u5beb\u5165Texture (MipMaps [0])\n\tUTexture2D* ReconstructedTexture = UTexture2D::CreateTransient(RenderTarget->SizeX, RenderTarget->SizeY, PF_B8G8R8A8);\n\tuint8* MipData = (uint8*)ReconstructedTexture->PlatformData->Mips[0].BulkData.Lock(LOCK_READ_WRITE);\n\tconst int32 DataSize = RenderTarget->SizeY * RenderTarget->SizeX * 4;\n\tFMemory::Memcpy(MipData, InputBuffer.GetData(), DataSize);\n\n\tReconstructedTexture->PlatformData->Mips[0].BulkData.Unlock();\n\tReconstructedTexture->UpdateResource();\n\n\t\/\/ \u5c07Texture\u586b\u6effCanvas\n\tCanvas->K2_DrawTexture(ReconstructedTexture, FVector2D::ZeroVector, Size, FVector2D(0, 0), FVector2D(1, 1), FLinearColor::White, EBlendMode::BLEND_Opaque);\n}\nUKismetRenderingLibrary::EndDrawCanvasToRenderTarget(this, RenderContext);<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u6642\u6211\u5011\u6703\u9700\u8981\u5132\u5b58RenderTarget\u7684Pixel\u8cc7\u8a0a\u5728\u904a\u6232\u5b58\u6a94\uff0c\u5982\u5730\u5716\u63a2\u7d22\u7bc4\u570d\u3001\u62cd\u7167\u7167\u7247\u7b49\u7b49\u3002\u7136\u800cUE4 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-109","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paZrII-1L","_links":{"self":[{"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/posts\/109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/strangechu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=109"}],"version-history":[{"count":2,"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/posts\/109\/revisions"}],"predecessor-version":[{"id":111,"href":"https:\/\/strangechu.com\/index.php?rest_route=\/wp\/v2\/posts\/109\/revisions\/111"}],"wp:attachment":[{"href":"https:\/\/strangechu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/strangechu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/strangechu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}