Added a method OpenGLContext::setImageCacheSize to provide explicit control over the amount of GPU space that is used for the internal image cache.

modules/juce_opengl/opengl/juce_OpenGLContext.cpp

@@ -596,6 +596,7 @@ private:
 OpenGLContext::OpenGLContext()
     : nativeContext (nullptr), renderer (nullptr), currentRenderScale (1.0),
       contextToShareWith (nullptr), versionRequired (OpenGLContext::defaultGLVersion),
+      imageCacheMaxSize (8 * 1024 * 1024),
       renderComponents (true), useMultisampling (false), continuousRepaint (false)
 {
 }
@@ -812,6 +813,9 @@ void OpenGLContext::setAssociatedObject (const char* name, ReferenceCountedObjec
     }
 }
 
+void OpenGLContext::setImageCacheSize (size_t newSize) noexcept     { imageCacheMaxSize = newSize; }
+size_t OpenGLContext::getImageCacheSize() const noexcept            { return imageCacheMaxSize; }
+
 void OpenGLContext::copyTexture (const Rectangle<int>& targetClipArea,
                                  const Rectangle<int>& anchorPosAndTextureSize,
                                  const int contextWidth, const int contextHeight,

modules/juce_opengl/opengl/juce_OpenGLContext.h

@@ -262,6 +262,12 @@ public:
                       bool textureOriginIsBottomLeft);
 
 
+    /** Changes the amount of GPU memory that the internal cache for Images is allowed to use. */
+    void setImageCacheSize (size_t cacheSizeBytes) noexcept;
+
+    /** Returns the amount of GPU memory that the internal cache for Images is allowed to use. */
+    size_t getImageCacheSize() const noexcept;
+
     //==============================================================================
    #ifndef DOXYGEN
     class NativeContext;
@@ -277,6 +283,7 @@ private:
     OpenGLPixelFormat pixelFormat;
     void* contextToShareWith;
     OpenGLVersion versionRequired;
+    size_t imageCacheMaxSize;
     bool renderComponents, useMultisampling, continuousRepaint;
 
     CachedImage* getCachedImage() const noexcept;

modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp

@@ -38,8 +38,8 @@ struct TextureInfo
 struct CachedImageList  : public ReferenceCountedObject,
                           private ImagePixelData::Listener
 {
-    CachedImageList (OpenGLContext& c, size_t totalCacheSizeInPixels = 8 * 1024 * 1024) noexcept
-        : context (c), totalSize (0), maxCacheSize (totalCacheSizeInPixels) {}
+    CachedImageList (OpenGLContext& c) noexcept
+        : context (c), totalSize (0), maxCacheSize (c.getImageCacheSize()) {}
 
     static CachedImageList* get (OpenGLContext& c)
     {