Added support for scaling SVG graphics files directly when loading them.

es-core/src/resources/TextureData.cpp

@@ -26,6 +26,7 @@ TextureData::TextureData(
         : mTile(tile),
         mTextureID(0),
         mDataRGBA({}),
+        mScaleSVG(1.0f),
         mScalable(false),
         mWidth(0),
         mHeight(0),
@@ -59,7 +60,7 @@ bool TextureData::initSVGFromMemory(const std::string& fileData)
     NSVGimage* svgImage = nsvgParse(const_cast<char*>(fileData.c_str()), "px", DPI);
 
     if (!svgImage) {
-        LOG(LogError) << "Error parsing SVG image.";
+        LOG(LogError) << "Couldn't parse SVG image";
         return false;
     }
 
@@ -69,8 +70,9 @@ bool TextureData::initSVGFromMemory(const std::string& fileData)
         mSourceWidth = svgImage->width;
         mSourceHeight = svgImage->height;
     }
-    mWidth = static_cast<size_t>(std::round(mSourceWidth));
-    mHeight = static_cast<size_t>(std::round(mSourceHeight));
+
+    mWidth = static_cast<size_t>(std::round(mSourceWidth * mScaleSVG));
+    mHeight = static_cast<size_t>(std::round(mSourceHeight * mScaleSVG));
 
     if (mWidth == 0) {
         // Auto scale width to keep aspect ratio.

es-core/src/resources/TextureData.h

@@ -54,6 +54,9 @@ public:
     float sourceHeight();
     void setSourceSize(float width, float height);
 
+    // Define a factor for scaling the SVG graphics when loading it (1.0f = no scaling).
+    void setScaleSVGDuringLoad(float scale) { mScaleSVG = scale; }
+
     bool tiled() { return mTile; }
 
 private:
@@ -66,6 +69,7 @@ private:
     size_t mHeight;
     float mSourceWidth;
     float mSourceHeight;
+    float mScaleSVG;
     bool mScalable;
     bool mReloadable;
 };

es-core/src/resources/TextureDataManager.cpp

@@ -17,7 +17,7 @@ TextureDataManager::TextureDataManager()
 {
     unsigned char data[5 * 5 * 4];
     mBlank = std::shared_ptr<TextureData>(new TextureData(false));
-    for (int i = 0; i < (5 * 5); ++i) {
+    for (int i = 0; i < (5 * 5); i++) {
         data[i*4] = (i % 2) * 255;
         data[i*4+1] = (i % 2) * 255;
         data[i*4+2] = (i % 2) * 255;
@@ -130,7 +130,7 @@ void TextureDataManager::load(std::shared_ptr<TextureData> tex, bool block)
 
     size_t max_texture = settingVRAM * 1024 * 1024;
 
-    for (auto it = mTextures.crbegin(); it != mTextures.crend(); ++it) {
+    for (auto it = mTextures.crbegin(); it != mTextures.crend(); it++) {
         if (size < max_texture)
             break;
         //size -= (*it)->getVRAMUsage();

es-core/src/resources/TextureResource.cpp

@@ -19,7 +19,8 @@ std::set<TextureResource*> TextureResource::sAllTextures;
 TextureResource::TextureResource(
         const std::string& path,
         bool tile,
-        bool dynamic)
+        bool dynamic,
+        float scaleSVG)
         : mTextureData(nullptr),
         mForceLoad(false)
 {
@@ -31,6 +32,8 @@ TextureResource::TextureResource(
         if (dynamic) {
             data = sTextureDataManager.add(this, tile);
             data->initFromPath(path);
+            if (scaleSVG != 1.0f)
+                data->setScaleSVGDuringLoad(scaleSVG);
             // Force the texture manager to load it using a blocking load.
             sTextureDataManager.load(data, true);
         }
@@ -38,6 +41,8 @@ TextureResource::TextureResource(
             mTextureData = std::shared_ptr<TextureData>(new TextureData(tile));
             data = mTextureData;
             data->initFromPath(path);
+            if (scaleSVG != 1.0f)
+                data->setScaleSVGDuringLoad(scaleSVG);
             // Load it so we can read the width/height.
             data->load();
         }
@@ -124,14 +129,18 @@ bool TextureResource::bind()
     }
 }
 
-std::shared_ptr<TextureResource> TextureResource::get(const std::string& path, bool tile,
-        bool forceLoad, bool dynamic)
+std::shared_ptr<TextureResource> TextureResource::get(
+        const std::string& path,
+        bool tile,
+        bool forceLoad,
+        bool dynamic,
+        float scaleSVG)
 {
     std::shared_ptr<ResourceManager>& rm = ResourceManager::getInstance();
 
     const std::string canonicalPath = Utils::FileSystem::getCanonicalPath(path);
     if (canonicalPath.empty()) {
-        std::shared_ptr<TextureResource> tex(new TextureResource("", tile, false));
+        std::shared_ptr<TextureResource> tex(new TextureResource("", tile, false, scaleSVG));
         // Make sure we get properly deinitialized even though we do nothing on reinitialization.
         rm->addReloadable(tex);
         return tex;
@@ -147,7 +156,7 @@ std::shared_ptr<TextureResource> TextureResource::get(const std::string& path, b
 
     // Need to create it.
     std::shared_ptr<TextureResource> tex;
-    tex = std::shared_ptr<TextureResource>(new TextureResource(key.first, tile, dynamic));
+    tex = std::shared_ptr<TextureResource>(new TextureResource(key.first, tile, dynamic, scaleSVG));
     std::shared_ptr<TextureData> data = sTextureDataManager.get(tex.get());
 
     // Is it an SVG?

es-core/src/resources/TextureResource.h

@@ -25,13 +25,20 @@ class TextureData;
 class TextureResource : public IReloadable
 {
 public:
-    static std::shared_ptr<TextureResource> get(const std::string& path, bool tile = false,
-            bool forceLoad = false, bool dynamic = true);
+    static std::shared_ptr<TextureResource> get(
+            const std::string& path,
+            bool tile = false,
+            bool forceLoad = false,
+            bool dynamic = true,
+            float scaleSVG = 1.0f);
     void initFromPixels(const unsigned char* dataRGBA, size_t width, size_t height);
     virtual void initFromMemory(const char* data, size_t length);
     static void manualUnload(std::string path, bool tile);
 
-    // For scalable source images in textures we want to set the resolution to rasterize at.
+    // For SVG graphics this function effectively rescales the image to the defined size.
+    // It does unload and re-rasterize the texture though which may cause flickering in some
+    // situations. An alternative is to set a scaling factor directly when loading the texture
+    // using get(), by using the scaleSVG parameter.
     void rasterizeAt(size_t width, size_t height);
     Vector2f getSourceImageSize() const;
 
@@ -49,7 +56,7 @@ public:
     static size_t getTotalTextureSize();
 
 protected:
-    TextureResource(const std::string& path, bool tile, bool dynamic);
+    TextureResource(const std::string& path, bool tile, bool dynamic, float scaleSVG);
     virtual void unload(std::shared_ptr<ResourceManager>& rm);
     virtual void reload(std::shared_ptr<ResourceManager>& rm);