check minimum size for gl canvas

[Title] check minimum size for gl canvas
[Issue#] N/A
[Problem] N_SE-36822
[Cause] if the canvas size is too small, no benefit to acceletate it
[Solution] set minimum size to 32 for gl canvas

Change-Id: I6377caae6a4ba7c742bd6ecb40b6ac4b02a18457

diff --git a/Source/WebCore/html/HTMLCanvasElement.cpp b/Source/WebCore/html/HTMLCanvasElement.cpp
index 148510b..c792ee5 100644 (file)
--- a/Source/WebCore/html/HTMLCanvasElement.cpp
+++ b/Source/WebCore/html/HTMLCanvasElement.cpp
@@ -80,6 +80,8 @@ static const int DefaultHeight = 150;
 #if ENABLE(TIZEN_CANVAS_CAIRO_GLES_RENDERING)
 static const int MaxCairoGlSizeWidth = 4096;
 static const int MaxCairoGlSizeHeight = 4096;
+static const int MinCairoGlSizeWidth = 32;
+static const int MinCairoGlSizeHeight = 32;
 #endif
 // Firefox limits width/height to 32767 pixels, but slows down dramatically before it
 // reaches that limit. We limit by area instead, giving us larger maximum dimensions,
@@ -520,7 +522,7 @@ bool HTMLCanvasElement::shouldAccelerate(const IntSize& size) const
     return true;
 #elif ENABLE(TIZEN_ACCELERATED_2D_CANVAS_EFL)
 #if ENABLE(TIZEN_CANVAS_CAIRO_GLES_RENDERING)
-    if (size.width() > MaxCairoGlSizeWidth || size.height() > MaxCairoGlSizeHeight) {
+    if (size.width() > MaxCairoGlSizeWidth || size.height() > MaxCairoGlSizeHeight || size.width() < MinCairoGlSizeWidth || size.height() < MinCairoGlSizeHeight) {
         if (renderBox() && renderBox()->hasLayer())
             renderBox()->layer()->clearBacking();
         return false;