From 1ebc6fa13e9801eb9901e79ca238fc1fdb5776d8 Mon Sep 17 00:00:00 2001
From: Bret Curtis <psi29a@gmail.com>
Date: Tue, 9 Aug 2022 21:49:28 +0200
Subject: [PATCH] go from softwareDecompress to decompress

---
 components/sdlutil/sdlcursormanager.cpp | 151 ++++++++----------------
 1 file changed, 46 insertions(+), 105 deletions(-)

diff --git a/components/sdlutil/sdlcursormanager.cpp b/components/sdlutil/sdlcursormanager.cpp
index dc8a6dbeda..6a67119ad8 100644
--- a/components/sdlutil/sdlcursormanager.cpp
+++ b/components/sdlutil/sdlcursormanager.cpp
@@ -24,110 +24,6 @@
 USE_GRAPHICSWINDOW()
 #endif
 
-namespace CursorDecompression
-{
-    class MyGraphicsContext {
-        public:
-            MyGraphicsContext(int w, int h)
-            {
-                osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
-                traits->x = 0;
-                traits->y = 0;
-                traits->width = w;
-                traits->height = h;
-                traits->red = 8;
-                traits->green = 8;
-                traits->blue = 8;
-                traits->alpha = 8;
-                traits->windowDecoration = false;
-                traits->doubleBuffer = false;
-                traits->sharedContext = nullptr;
-                traits->pbuffer = true;
-
-                osg::GraphicsContext::ScreenIdentifier si;
-                si.readDISPLAY();
-                if (si.displayNum<0) si.displayNum = 0;
-                traits->displayNum = si.displayNum;
-                traits->screenNum = si.screenNum;
-                traits->hostName = si.hostName;
-
-                _gc = osg::GraphicsContext::createGraphicsContext(traits.get());
-
-                if (!_gc)
-                {
-                    Log(Debug::Warning) << "Failed to create pbuffer, failing back to normal graphics window.";
-
-                    traits->pbuffer = false;
-                    _gc = osg::GraphicsContext::createGraphicsContext(traits.get());
-                    if (!_gc)
-                        throw std::runtime_error("Failed to create graphics context for image decompression");
-                }
-
-                if (_gc.valid())
-                {
-                    _gc->realize();
-                    _gc->makeCurrent();
-                }
-            }
-
-            osg::ref_ptr<osg::GraphicsContext> getContext()
-            {
-                return _gc;
-            }
-
-            bool valid() const { return _gc.valid() && _gc->isRealized(); }
-
-        private:
-            osg::ref_ptr<osg::GraphicsContext> _gc;
-    };
-
-    SDLUtil::SurfaceUniquePtr softwareDecompress (osg::ref_ptr<osg::Image> source, float rotDegrees)
-    {
-        int width = source->s();
-        int height = source->t();
-        bool useAlpha = source->isImageTranslucent();
-
-        osg::ref_ptr<osg::Image> decompressedImage = new osg::Image;
-        decompressedImage->setFileName(source->getFileName());
-        decompressedImage->allocateImage(width, height, 1, useAlpha ? GL_RGBA : GL_RGB, GL_UNSIGNED_BYTE);
-        for (int s=0; s<width; ++s)
-            for (int t=0; t<height; ++t)
-                decompressedImage->setColor(source->getColor(s,t,0), s,t,0);
-
-        Uint32 redMask = 0x000000ff;
-        Uint32 greenMask = 0x0000ff00;
-        Uint32 blueMask = 0x00ff0000;
-        Uint32 alphaMask = useAlpha ? 0xff000000 : 0;
-
-        SDL_Surface *cursorSurface = SDL_CreateRGBSurfaceFrom(decompressedImage->data(),
-            width,
-            height,
-            decompressedImage->getPixelSizeInBits(),
-            decompressedImage->getRowSizeInBytes(),
-            redMask,
-            greenMask,
-            blueMask,
-            alphaMask);
-
-        SDL_Surface *targetSurface = SDL_CreateRGBSurface(0, width, height, 32, redMask, greenMask, blueMask, alphaMask);
-        SDL_Renderer *renderer = SDL_CreateSoftwareRenderer(targetSurface);
-
-        SDL_RenderClear(renderer);
-
-        SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");
-        SDL_Texture *cursorTexture = SDL_CreateTextureFromSurface(renderer, cursorSurface);
-
-        SDL_RenderCopyEx(renderer, cursorTexture, nullptr, nullptr, -rotDegrees, nullptr, SDL_FLIP_VERTICAL);
-
-        SDL_DestroyTexture(cursorTexture);
-        SDL_FreeSurface(cursorSurface);
-        SDL_DestroyRenderer(renderer);
-
-        return SDLUtil::SurfaceUniquePtr(targetSurface, SDL_FreeSurface);
-    }
-
-}
-
 namespace SDLUtil
 {
 
@@ -190,13 +86,58 @@ namespace SDLUtil
 #endif
     }
 
+    SDLUtil::SurfaceUniquePtr decompress(osg::ref_ptr<osg::Image> source, float rotDegrees)
+    {
+        int width = source->s();
+        int height = source->t();
+        bool useAlpha = source->isImageTranslucent();
+
+        osg::ref_ptr<osg::Image> decompressedImage = new osg::Image;
+        decompressedImage->setFileName(source->getFileName());
+        decompressedImage->allocateImage(width, height, 1, useAlpha ? GL_RGBA : GL_RGB, GL_UNSIGNED_BYTE);
+        for (int s=0; s<width; ++s)
+            for (int t=0; t<height; ++t)
+                decompressedImage->setColor(source->getColor(s,t,0), s,t,0);
+
+        Uint32 redMask = 0x000000ff;
+        Uint32 greenMask = 0x0000ff00;
+        Uint32 blueMask = 0x00ff0000;
+        Uint32 alphaMask = useAlpha ? 0xff000000 : 0;
+
+        SDL_Surface *cursorSurface = SDL_CreateRGBSurfaceFrom(decompressedImage->data(),
+                                                              width,
+                                                              height,
+                                                              decompressedImage->getPixelSizeInBits(),
+                                                              decompressedImage->getRowSizeInBytes(),
+                                                              redMask,
+                                                              greenMask,
+                                                              blueMask,
+                                                              alphaMask);
+
+        SDL_Surface *targetSurface = SDL_CreateRGBSurface(0, width, height, 32, redMask, greenMask, blueMask, alphaMask);
+        SDL_Renderer *renderer = SDL_CreateSoftwareRenderer(targetSurface);
+
+        SDL_RenderClear(renderer);
+
+        SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");
+        SDL_Texture *cursorTexture = SDL_CreateTextureFromSurface(renderer, cursorSurface);
+
+        SDL_RenderCopyEx(renderer, cursorTexture, nullptr, nullptr, -rotDegrees, nullptr, SDL_FLIP_VERTICAL);
+
+        SDL_DestroyTexture(cursorTexture);
+        SDL_FreeSurface(cursorSurface);
+        SDL_DestroyRenderer(renderer);
+
+        return SDLUtil::SurfaceUniquePtr(targetSurface, SDL_FreeSurface);
+    }
+
     void SDLCursorManager::_createCursorFromResource(const std::string& name, int rotDegrees, osg::Image* image, Uint8 hotspot_x, Uint8 hotspot_y)
     {
         if (mCursorMap.find(name) != mCursorMap.end())
             return;
 
         try {
-            auto surface = CursorDecompression::softwareDecompress(image, static_cast<float>(rotDegrees));
+            auto surface = decompress(image, static_cast<float>(rotDegrees));
 
             //set the cursor and store it for later
             SDL_Cursor* curs = SDL_CreateColorCursor(surface.get(), hotspot_x, hotspot_y);