Create empty OpenGL textures in batches.

10 files changed, 71 insertions, 41 deletions

diff --git a/src/resources/imagehelper.cpp b/src/resources/imagehelper.cpp
index 0092d132b..329a487da 100644
--- a/src/resources/imagehelper.cpp
+++ b/src/resources/imagehelper.cpp
@@ -40,7 +40,7 @@ ImageHelper *surfaceImageHelper = nullptr;
 bool ImageHelper::mEnableAlpha = true;
 RenderType ImageHelper::mUseOpenGL = RENDER_SOFTWARE;
 
-Image *ImageHelper::load(SDL_RWops *const rw) const
+Image *ImageHelper::load(SDL_RWops *const rw)
 {
     SDL_Surface *const tmpImage = loadPng(rw);
     if (!tmpImage)
@@ -55,7 +55,7 @@ Image *ImageHelper::load(SDL_RWops *const rw) const
     return image;
 }
 
-Image *ImageHelper::load(SDL_RWops *const rw, Dye const &dye) const
+Image *ImageHelper::load(SDL_RWops *const rw, Dye const &dye)
 {
     SDL_Surface *const tmpImage = loadPng(rw);
     if (!tmpImage)
diff --git a/src/resources/imagehelper.h b/src/resources/imagehelper.h
index b91d9aaee..6752f3eae 100644
--- a/src/resources/imagehelper.h
+++ b/src/resources/imagehelper.h
@@ -56,19 +56,18 @@ class ImageHelper notfinal
          * @return <code>NULL</code> if an error occurred, a valid pointer
          *         otherwise.
          */
-        Image *load(SDL_RWops *const rw) const A_WARN_UNUSED;
+        Image *load(SDL_RWops *const rw) A_WARN_UNUSED;
 
-        virtual Image *load(SDL_RWops *const rw, Dye
-                            const &dye) const A_WARN_UNUSED;
+        virtual Image *load(SDL_RWops *const rw, Dye const &dye) A_WARN_UNUSED;
 
 #ifdef __GNUC__
-        virtual Image *load(SDL_Surface *const) const A_WARN_UNUSED = 0;
+        virtual Image *load(SDL_Surface *const) A_WARN_UNUSED = 0;
 
         virtual Image *createTextSurface(SDL_Surface *const tmpImage,
                                          const int width, const int height,
-                                         float alpha) const A_WARN_UNUSED = 0;
+                                         float alpha) A_WARN_UNUSED = 0;
 #else
-        virtual Image *load(SDL_Surface *) const A_WARN_UNUSED
+        virtual Image *load(SDL_Surface *) A_WARN_UNUSED
         { return nullptr; }
 
         virtual Image *createTextSurface(SDL_Surface *const tmpImage,
@@ -96,6 +95,9 @@ class ImageHelper notfinal
         virtual RenderType useOpenGL() const A_WARN_UNUSED
         { return mUseOpenGL; }
 
+        virtual void postInit()
+        { }
+
     protected:
         ImageHelper()
         { }
diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
index 292b2fb22..d06500a18 100644
--- a/src/resources/openglimagehelper.cpp
+++ b/src/resources/openglimagehelper.cpp
@@ -48,7 +48,13 @@ int OpenGLImageHelper::mTextureSize = 0;
 bool OpenGLImageHelper::mBlur = true;
 bool OpenGLImageHelper::mUseTextureSampler = false;
 
-Image *OpenGLImageHelper::load(SDL_RWops *const rw, Dye const &dye) const
+OpenGLImageHelper::~OpenGLImageHelper()
+{
+    glDeleteTextures(texturesSize - mFreeTextureIndex,
+        &mTextures[mFreeTextureIndex]);
+}
+
+Image *OpenGLImageHelper::load(SDL_RWops *const rw, Dye const &dye)
 {
     SDL_Surface *const tmpImage = loadPng(rw);
     if (!tmpImage)
@@ -92,14 +98,14 @@ Image *OpenGLImageHelper::load(SDL_RWops *const rw, Dye const &dye) const
     return image;
 }
 
-Image *OpenGLImageHelper::load(SDL_Surface *const tmpImage) const
+Image *OpenGLImageHelper::load(SDL_Surface *const tmpImage)
 {
     return glLoad(tmpImage);
 }
 
 Image *OpenGLImageHelper::createTextSurface(SDL_Surface *const tmpImage,
                                             const int width, const int height,
-                                            const float alpha) const
+                                            const float alpha)
 {
     if (!tmpImage)
         return nullptr;
@@ -127,7 +133,7 @@ int OpenGLImageHelper::powerOfTwo(const int input)
 }
 
 Image *OpenGLImageHelper::glLoad(SDL_Surface *tmpImage,
-                                 int width, int height) const
+                                 int width, int height)
 {
     if (!tmpImage)
         return nullptr;
@@ -191,8 +197,7 @@ Image *OpenGLImageHelper::glLoad(SDL_Surface *tmpImage,
         SDL_BlitSurface(oldImage, nullptr, tmpImage, nullptr);
     }
 
-    GLuint texture;
-    glGenTextures(1, &texture);
+    const GLuint texture = getNewTexture();
     switch (mUseOpenGL)
     {
 #ifndef ANDROID
@@ -321,4 +326,21 @@ SDL_Surface *OpenGLImageHelper::create32BitSurface(int width,
         width, height, 32, rmask, gmask, bmask, amask);
 }
 
+GLuint OpenGLImageHelper::getNewTexture()
+{
+    GLuint texture = mTextures[mFreeTextureIndex];
+    mFreeTextureIndex ++;
+    if (mFreeTextureIndex == texturesSize)
+    {
+        mFreeTextureIndex = 0;
+        postInit();
+    }
+    return texture;
+}
+
+void OpenGLImageHelper::postInit()
+{
+    glGenTextures(texturesSize, &mTextures[mFreeTextureIndex]);
+}
+
 #endif
diff --git a/src/resources/openglimagehelper.h b/src/resources/openglimagehelper.h
index 2f203a00a..d87052592 100644
--- a/src/resources/openglimagehelper.h
+++ b/src/resources/openglimagehelper.h
@@ -58,14 +58,14 @@ class OpenGLImageHelper final : public ImageHelper
     friend class Image;
 
     public:
-        OpenGLImageHelper()
+        OpenGLImageHelper() :
+            mFreeTextureIndex(0)
         {
         }
 
         A_DELETE_COPY(OpenGLImageHelper)
 
-        ~OpenGLImageHelper()
-        { }
+        ~OpenGLImageHelper();
 
         /**
          * Loads an image from an SDL_RWops structure and recolors it.
@@ -77,18 +77,18 @@ class OpenGLImageHelper final : public ImageHelper
          *         otherwise.
          */
         Image *load(SDL_RWops *const rw,
-                    Dye const &dye) const override final A_WARN_UNUSED;
+                    Dye const &dye) override final A_WARN_UNUSED;
 
         /**
          * Loads an image from an SDL surface.
          */
-        Image *load(SDL_Surface *const tmpImage) const
+        Image *load(SDL_Surface *const tmpImage)
                     override final A_WARN_UNUSED;
 
         Image *createTextSurface(SDL_Surface *const tmpImage,
                                  const int width, const int height,
                                  const float alpha)
-                                 const override final A_WARN_UNUSED;
+                                 override final A_WARN_UNUSED;
 
         // OpenGL only public functions
 
@@ -119,6 +119,8 @@ class OpenGLImageHelper final : public ImageHelper
         SDL_Surface *create32BitSurface(int width,
                                         int height) const override final;
 
+        void postInit() override final;
+
     protected:
         /**
          * Returns the first power of two equal or bigger than the input.
@@ -126,7 +128,13 @@ class OpenGLImageHelper final : public ImageHelper
         static int powerOfTwo(const int input) A_WARN_UNUSED;
 
         Image *glLoad(SDL_Surface *tmpImage,
-                      int width = 0, int height = 0) const A_WARN_UNUSED;
+                      int width = 0, int height = 0) A_WARN_UNUSED;
+
+        GLuint getNewTexture();
+
+        static const size_t texturesSize = 10;
+        size_t mFreeTextureIndex;
+        GLuint mTextures[texturesSize];
 
         static int mTextureSize;
         static bool mBlur;
diff --git a/src/resources/sdl2imagehelper.cpp b/src/resources/sdl2imagehelper.cpp
index 3cda18c51..e9d0f11e9 100644
--- a/src/resources/sdl2imagehelper.cpp
+++ b/src/resources/sdl2imagehelper.cpp
@@ -44,7 +44,7 @@ bool SDLImageHelper::mEnableAlphaCache = false;
 SDL_Renderer *SDLImageHelper::mRenderer = nullptr;
 #endif
 
-Image *SDLImageHelper::load(SDL_Surface *const tmpImage) const
+Image *SDLImageHelper::load(SDL_Surface *const tmpImage)
 {
     return _SDLload(tmpImage);
 }
@@ -71,7 +71,7 @@ SDL_Surface* SDLImageHelper::SDLDuplicateSurface(SDL_Surface *const tmpImage)
     return MSDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
 }
 
-Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage) const
+Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage)
 {
     if (!tmpImage)
         return nullptr;
diff --git a/src/resources/sdl2imagehelper.h b/src/resources/sdl2imagehelper.h
index 296b50f8a..0ffeee7ae 100644
--- a/src/resources/sdl2imagehelper.h
+++ b/src/resources/sdl2imagehelper.h
@@ -54,7 +54,7 @@ class SDLImageHelper final : public ImageHelper
         /**
          * Loads an image from an SDL surface.
          */
-        Image *load(SDL_Surface *const tmpImage) const
+        Image *load(SDL_Surface *const tmpImage)
                     override final A_WARN_UNUSED;
 
         Image *createTextSurface(SDL_Surface *const tmpImage,
@@ -83,7 +83,7 @@ class SDLImageHelper final : public ImageHelper
 
     protected:
         /** SDL_Surface to SDL_Surface Image loader */
-        Image *_SDLload(SDL_Surface *tmpImage) const A_WARN_UNUSED;
+        Image *_SDLload(SDL_Surface *tmpImage) A_WARN_UNUSED;
 
         static bool mEnableAlphaCache;
 #ifdef USE_SDL2
diff --git a/src/resources/sdl2softwareimagehelper.cpp b/src/resources/sdl2softwareimagehelper.cpp
index fa0a51606..2e73409ef 100644
--- a/src/resources/sdl2softwareimagehelper.cpp
+++ b/src/resources/sdl2softwareimagehelper.cpp
@@ -41,7 +41,7 @@
 bool SDL2SoftwareImageHelper::mEnableAlphaCache = false;
 SDL_PixelFormat *SDL2SoftwareImageHelper::mFormat = nullptr;
 
-Image *SDL2SoftwareImageHelper::load(SDL_Surface *const tmpImage) const
+Image *SDL2SoftwareImageHelper::load(SDL_Surface *const tmpImage)
 {
     return _SDLload(tmpImage);
 }
@@ -49,7 +49,7 @@ Image *SDL2SoftwareImageHelper::load(SDL_Surface *const tmpImage) const
 Image *SDL2SoftwareImageHelper::createTextSurface(SDL_Surface *const tmpImage,
                                                   const int width A_UNUSED,
                                                   const int height A_UNUSED,
-                                                  const float alpha) const
+                                                  const float alpha)
 {
     if (!tmpImage)
         return nullptr;
@@ -69,7 +69,7 @@ SDL_Surface* SDL2SoftwareImageHelper::SDLDuplicateSurface(SDL_Surface *const
     return MSDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
 }
 
-Image *SDL2SoftwareImageHelper::_SDLload(SDL_Surface *tmpImage) const
+Image *SDL2SoftwareImageHelper::_SDLload(SDL_Surface *tmpImage)
 {
     if (!tmpImage)
         return nullptr;
diff --git a/src/resources/sdl2softwareimagehelper.h b/src/resources/sdl2softwareimagehelper.h
index 41af65fdb..3d580a79f 100644
--- a/src/resources/sdl2softwareimagehelper.h
+++ b/src/resources/sdl2softwareimagehelper.h
@@ -54,13 +54,12 @@ class SDL2SoftwareImageHelper final : public ImageHelper
         /**
          * Loads an image from an SDL surface.
          */
-        Image *load(SDL_Surface *const tmpImage) const
-                    override final A_WARN_UNUSED;
+        Image *load(SDL_Surface *const tmpImage) override final A_WARN_UNUSED;
 
         Image *createTextSurface(SDL_Surface *const tmpImage,
                                  const int width, const int height,
                                  const float alpha)
-                                 const override final A_WARN_UNUSED;
+                                 override final A_WARN_UNUSED;
 
         static void SDLSetEnableAlphaCache(const bool n)
         { mEnableAlphaCache = n; }
@@ -88,7 +87,7 @@ class SDL2SoftwareImageHelper final : public ImageHelper
 
     protected:
         /** SDL_Surface to SDL_Surface Image loader */
-        Image *_SDLload(SDL_Surface *tmpImage) const A_WARN_UNUSED;
+        Image *_SDLload(SDL_Surface *tmpImage) A_WARN_UNUSED;
 
         static bool mEnableAlphaCache;
         static SDL_PixelFormat *mFormat;
diff --git a/src/resources/sdlimagehelper.cpp b/src/resources/sdlimagehelper.cpp
index 16f0b45ba..7d4090deb 100644
--- a/src/resources/sdlimagehelper.cpp
+++ b/src/resources/sdlimagehelper.cpp
@@ -40,7 +40,7 @@
 
 bool SDLImageHelper::mEnableAlphaCache = false;
 
-Image *SDLImageHelper::load(SDL_RWops *const rw, Dye const &dye) const
+Image *SDLImageHelper::load(SDL_RWops *const rw, Dye const &dye)
 {
     SDL_Surface *const tmpImage = loadPng(rw);
     if (!tmpImage)
@@ -104,7 +104,7 @@ Image *SDLImageHelper::load(SDL_RWops *const rw, Dye const &dye) const
     return image;
 }
 
-Image *SDLImageHelper::load(SDL_Surface *const tmpImage) const
+Image *SDLImageHelper::load(SDL_Surface *const tmpImage)
 {
     return _SDLload(tmpImage);
 }
@@ -112,7 +112,7 @@ Image *SDLImageHelper::load(SDL_Surface *const tmpImage) const
 Image *SDLImageHelper::createTextSurface(SDL_Surface *const tmpImage,
                                          const int width A_UNUSED,
                                          const int height A_UNUSED,
-                                         const float alpha) const
+                                         const float alpha)
 {
     if (!tmpImage)
         return nullptr;
@@ -185,7 +185,7 @@ SDL_Surface* SDLImageHelper::SDLDuplicateSurface(SDL_Surface *const tmpImage)
     return MSDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
 }
 
-Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage) const
+Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage)
 {
     if (!tmpImage)
         return nullptr;
diff --git a/src/resources/sdlimagehelper.h b/src/resources/sdlimagehelper.h
index 18228c2e9..c80a7ba2b 100644
--- a/src/resources/sdlimagehelper.h
+++ b/src/resources/sdlimagehelper.h
@@ -62,18 +62,17 @@ class SDLImageHelper final : public ImageHelper
          *         otherwise.
          */
         Image *load(SDL_RWops *const rw,
-                    Dye const &dye) const override final A_WARN_UNUSED;
+                    Dye const &dye) override final A_WARN_UNUSED;
 
         /**
          * Loads an image from an SDL surface.
          */
-        Image *load(SDL_Surface *const tmpImage) const
-                    override final A_WARN_UNUSED;
+        Image *load(SDL_Surface *const tmpImage) override final A_WARN_UNUSED;
 
         Image *createTextSurface(SDL_Surface *const tmpImage,
                                  const int width, const int height,
                                  const float alpha)
-                                 const override final A_WARN_UNUSED;
+                                 override final A_WARN_UNUSED;
 
         static void SDLSetEnableAlphaCache(const bool n)
         { mEnableAlphaCache = n; }
@@ -91,7 +90,7 @@ class SDLImageHelper final : public ImageHelper
 
     protected:
         /** SDL_Surface to SDL_Surface Image loader */
-        Image *_SDLload(SDL_Surface *tmpImage) const A_WARN_UNUSED;
+        Image *_SDLload(SDL_Surface *tmpImage) A_WARN_UNUSED;
 
         static bool mEnableAlphaCache;
 };