Add to OpenGL renderers function for clear screen.

6 files changed, 24 insertions, 0 deletions

diff --git a/src/render/graphics.h b/src/render/graphics.h
index d26f8a770..58e08888a 100644
--- a/src/render/graphics.h
+++ b/src/render/graphics.h
@@ -444,6 +444,9 @@ class Graphics
         virtual void endDraw()
         { }
 
+        virtual void clearScreen() const
+        { }
+
         int mWidth;
         int mHeight;
         int mActualWidth;
diff --git a/src/render/mobileopenglgraphics.cpp b/src/render/mobileopenglgraphics.cpp
index 58760ce60..8150c4f66 100644
--- a/src/render/mobileopenglgraphics.cpp
+++ b/src/render/mobileopenglgraphics.cpp
@@ -1318,6 +1318,11 @@ void MobileOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
     #include "render/graphics_calcImageRect.hpp"
 }
 
+void MobileOpenGLGraphics::clearScreen() const
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void MobileOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/normalopenglgraphics.cpp b/src/render/normalopenglgraphics.cpp
index c8fe89c89..75064a435 100644
--- a/src/render/normalopenglgraphics.cpp
+++ b/src/render/normalopenglgraphics.cpp
@@ -1607,6 +1607,11 @@ void NormalOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
     #include "render/graphics_calcImageRect.hpp"
 }
 
+void NormalOpenGLGraphics::clearScreen() const
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void NormalOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/nullopenglgraphics.cpp b/src/render/nullopenglgraphics.cpp
index 40a952db8..ca6fa1660 100644
--- a/src/render/nullopenglgraphics.cpp
+++ b/src/render/nullopenglgraphics.cpp
@@ -1185,6 +1185,10 @@ void NullOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
     #include "render/graphics_calcImageRect.hpp"
 }
 
+void NullOpenGLGraphics::clearScreen() const
+{
+}
+
 #ifdef DEBUG_BIND_TEXTURE
 void NullOpenGLGraphics::debugBindTexture(const Image *const image)
 {
diff --git a/src/render/openglgraphicsdef.hpp b/src/render/openglgraphicsdef.hpp
index 4315d4115..1df90e3ee 100644
--- a/src/render/openglgraphicsdef.hpp
+++ b/src/render/openglgraphicsdef.hpp
@@ -49,6 +49,8 @@ public:
     bool isAllowScale() const override final
     { return true; }
 
+    void clearScreen() const override final;
+
     static void bindTexture(const GLenum target, const GLuint texture);
 
     static GLuint mLastImage;
diff --git a/src/render/safeopenglgraphics.cpp b/src/render/safeopenglgraphics.cpp
index 58ab99923..236e09841 100644
--- a/src/render/safeopenglgraphics.cpp
+++ b/src/render/safeopenglgraphics.cpp
@@ -722,6 +722,11 @@ void SafeOpenGLGraphics::restoreColor()
     mByteColor = mColor;
 }
 
+void SafeOpenGLGraphics::clearScreen() const
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
 void SafeOpenGLGraphics::drawImageRect(const int x, const int y,
                                        const int w, const int h,
                                        const ImageRect &imgRect)