Fix emoji async download drawing

5 files changed, 21 insertions, 12 deletions

diff --git a/src/Cache.cpp b/src/Cache.cpp
index 7e3272a..ba57d4c 100644
--- a/src/Cache.cpp
+++ b/src/Cache.cpp
@@ -71,6 +71,7 @@ namespace dchat
                     if(it->process->try_get_exit_status(exitStatus))
                     {
                         bool failed = exitStatus != 0;
+                        ImageByUrlResult &imageByUrlResult = imageUrlCache[it->url];
                         
                         if(!failed)
                         {
@@ -80,10 +81,10 @@ namespace dchat
                                 
                             try
                             {
-                                const sf::Texture *texture = ResourceCache::getTexture(filepath.string());
-                                ImageByUrlResult &imageByUrlResult = imageUrlCache[it->url];
+                                sf::Texture *texture = ResourceCache::getTexture(filepath.string());
                                 imageByUrlResult.texture = texture;
                                 imageByUrlResult.type = ImageByUrlResult::Type::CACHED;
+                                printf("Image downloaded from url: %s, texture: %u\n", it->url.c_str(), texture);
                             }
                             catch(FailedToLoadResourceException &e)
                             {
@@ -94,7 +95,7 @@ namespace dchat
                         
                         if(failed)
                         {
-                            imageUrlCache[it->url].type = ImageByUrlResult::Type::FAILED_DOWNLOAD;
+                            imageByUrlResult.type = ImageByUrlResult::Type::FAILED_DOWNLOAD;
                             fprintf(stderr, "Image download failed for url: %s\n", it->url.c_str());
                         }
                             
@@ -107,6 +108,8 @@ namespace dchat
                 
                 while(imageDownloadProcesses.empty())
                     this_thread::sleep_for(chrono::milliseconds(20));
+                
+                this_thread::sleep_for(chrono::milliseconds(20));
             }
         });
         downloadWaitThread.detach();
@@ -114,6 +117,7 @@ namespace dchat
     
     const ImageByUrlResult Cache::getImageByUrl(const string &url, int downloadLimitBytes)
     {
+        lock_guard<mutex> lock(imageDownloadMutex);
         auto it = imageUrlCache.find(url);
         if(it != imageUrlCache.end())
             return it->second;
@@ -128,10 +132,10 @@ namespace dchat
         {
             try
             {
-                const sf::Texture *texture = ResourceCache::getTexture(filepath.string());
-                lock_guard<mutex> lock(imageDownloadMutex);
+                sf::Texture *texture = ResourceCache::getTexture(filepath.string());
                 ImageByUrlResult result { texture, ImageByUrlResult::Type::CACHED };
                 imageUrlCache[url] = result;
+                printf("Loading image from file cache: %s\n", url.c_str());
                 return result;
             }
             catch(FailedToLoadResourceException &e)
@@ -140,7 +144,6 @@ namespace dchat
             }
         }
         
-        lock_guard<mutex> lock(imageDownloadMutex);
         ImageByUrlResult result { nullptr, ImageByUrlResult::Type::DOWNLOADING };
         imageUrlCache[url] = result;
         
diff --git a/src/Channel.cpp b/src/Channel.cpp
index 0fc7ec5..664e395 100644
--- a/src/Channel.cpp
+++ b/src/Channel.cpp
@@ -12,7 +12,7 @@ namespace dchat
         {
             Message *message = new Message(&localOfflineUser);
             message->addText(u8"hello, worldåäö1!");
-            message->addImage("https://discordemoji.com/assets/emoji/think_fish.png");
+            message->addImage("https://discordemoji.com/assets/emoji/playtime.png");
             messageBoard.addMessage(message);
         }
         
diff --git a/src/MessageBoard.cpp b/src/MessageBoard.cpp
index acb7be1..575ae5f 100644
--- a/src/MessageBoard.cpp
+++ b/src/MessageBoard.cpp
@@ -143,6 +143,9 @@ namespace dchat
                     case MessagePart::Type::EMOJI:
                     {
                         MessagePartEmoji *messagePartEmoji = static_cast<MessagePartEmoji*>(messagePart);
+                        // Emoji is dirty when it's created, but render target can become dirty after emoji has been added, so we need to set emoji as dirty then
+                        if(dirty)
+                            messagePartEmoji->dirty = true;
                         auto imageByUrlResult = cache.getImageByUrl(messagePartEmoji->url, 1024 * 512);
                         position.x += 5.0f;
                         if(imageByUrlResult.texture)
@@ -152,8 +155,11 @@ namespace dchat
                             sf::Vector2f spriteSize(MessagePartEmoji::getHeightScaled(), MessagePartEmoji::getHeightScaled());
                             messagePartEmoji->sprite.setScale(spriteSize.x / (float)imageByUrlResult.texture->getSize().x, spriteSize.y / (float)imageByUrlResult.texture->getSize().y);
                             messagePartEmoji->sprite.setPosition(floor(position.x), floor(position.y + MessagePart::getSizeScaled() * 0.5f - MessagePartEmoji::getHeightScaled() * 0.5f));
-                            if(dirty)
+                            if(messagePartEmoji->dirty)
+                            {
+                                messagePartEmoji->dirty = false;
                                 renderTarget->draw(messagePartEmoji->sprite);
+                            }
                         }
                         else
                         {
@@ -161,8 +167,7 @@ namespace dchat
                             sf::RectangleShape emojiDownloadRect(sf::Vector2f(MessagePartEmoji::getHeightScaled(), MessagePartEmoji::getHeightScaled()));
                             emojiDownloadRect.setPosition(floor(position.x), floor(position.y + MessagePart::getSizeScaled() * 0.5f - MessagePartEmoji::getHeightScaled() * 0.5f));
                             emojiDownloadRect.setFillColor(sf::Color::White);
-                            if(dirty)
-                                renderTarget->draw(emojiDownloadRect);
+                            window.draw(emojiDownloadRect);
                         }
                         position.x += MessagePartEmoji::getHeightScaled() + 5.0f;
                         break;
diff --git a/src/MessagePart.cpp b/src/MessagePart.cpp
index dcef3f3..1bde138 100644
--- a/src/MessagePart.cpp
+++ b/src/MessagePart.cpp
@@ -37,7 +37,8 @@ namespace dchat
     
     MessagePartEmoji::MessagePartEmoji(const string &_url) : 
         MessagePart(Type::EMOJI),
-        url(_url)
+        url(_url),
+        dirty(true)
     {
         
     }
diff --git a/src/ResourceCache.cpp b/src/ResourceCache.cpp
index 4bdd75d..ab583bb 100644
--- a/src/ResourceCache.cpp
+++ b/src/ResourceCache.cpp
@@ -27,7 +27,7 @@ namespace dchat
         return *font;
     }
     
-    const sf::Texture* ResourceCache::getTexture(const string &filepath)
+    sf::Texture* ResourceCache::getTexture(const string &filepath)
     {
         auto it = textures.find(filepath);
         if(it != textures.end())