From 081fbc566582c368d10565b291cd8e010faa9510 Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Mon, 27 Sep 2021 20:59:33 +0200
Subject: [PATCH] Made an optimization for SVG graphics to avoid a lot of
 unnecessary re-rasterizations.

---
 es-core/src/resources/TextureData.cpp     | 4 ++--
 es-core/src/resources/TextureData.h       | 3 +++
 es-core/src/resources/TextureResource.cpp | 7 ++++++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/es-core/src/resources/TextureData.cpp b/es-core/src/resources/TextureData.cpp
index 5760111e0..924abd87f 100644
--- a/es-core/src/resources/TextureData.cpp
+++ b/es-core/src/resources/TextureData.cpp
@@ -72,8 +72,8 @@ bool TextureData::initSVGFromMemory(const std::string& fileData)
         mSourceHeight = svgImage->height;
     }
 
-    mWidth = static_cast<size_t>(std::round(mSourceWidth * mScaleDuringLoad));
-    mHeight = static_cast<size_t>(std::round(mSourceHeight * mScaleDuringLoad));
+    mWidth = static_cast<size_t>(floorf(floorf(mSourceWidth) * mScaleDuringLoad));
+    mHeight = static_cast<size_t>(floorf(floorf(mSourceHeight) * mScaleDuringLoad));
 
     if (mWidth == 0) {
         // Auto scale width to keep aspect ratio.
diff --git a/es-core/src/resources/TextureData.h b/es-core/src/resources/TextureData.h
index ebb27b3e8..c50cd19d3 100644
--- a/es-core/src/resources/TextureData.h
+++ b/es-core/src/resources/TextureData.h
@@ -9,6 +9,8 @@
 #ifndef ES_CORE_RESOURCES_TEXTURE_DATA_H
 #define ES_CORE_RESOURCES_TEXTURE_DATA_H
 
+#include "utils/MathUtil.h"
+
 #include <cmath>
 #include <mutex>
 #include <string>
@@ -53,6 +55,7 @@ public:
     float sourceWidth();
     float sourceHeight();
     void setSourceSize(float width, float height);
+    glm::vec2 getSize() { return glm::vec2{mWidth, mHeight}; }
 
     // Define a factor for scaling the file when loading it (1.0f = no scaling).
     void setScaleDuringLoad(float scale) { mScaleDuringLoad = scale; }
diff --git a/es-core/src/resources/TextureResource.cpp b/es-core/src/resources/TextureResource.cpp
index 33fec7e8a..74e5d5bfe 100644
--- a/es-core/src/resources/TextureResource.cpp
+++ b/es-core/src/resources/TextureResource.cpp
@@ -194,9 +194,14 @@ std::shared_ptr<TextureResource> TextureResource::get(const std::string& path,
     return tex;
 }
 
-// For scalable source images in textures we want to set the resolution to rasterize at.
 void TextureResource::rasterizeAt(size_t width, size_t height)
 {
+    if (mTextureData != nullptr) {
+        glm::vec2 textureSize = mTextureData.get()->getSize();
+        if (textureSize.x == width && textureSize.y == height)
+            return;
+    }
+
     std::shared_ptr<TextureData> data;
     if (mTextureData != nullptr)
         data = mTextureData;