diff options
Diffstat (limited to 'WebCore/platform/graphics/android/GLUtils.cpp')
| -rw-r--r-- | WebCore/platform/graphics/android/GLUtils.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/WebCore/platform/graphics/android/GLUtils.cpp b/WebCore/platform/graphics/android/GLUtils.cpp index 1c84fe2..0923c54 100644 --- a/WebCore/platform/graphics/android/GLUtils.cpp +++ b/WebCore/platform/graphics/android/GLUtils.cpp @@ -67,16 +67,17 @@ void GLUtils::toGLMatrix(GLfloat* flattened, const TransformationMatrix& m) { void GLUtils::setOrthographicMatrix(TransformationMatrix& ortho, float left, float top, float right, float bottom, float nearZ, float farZ) { float deltaX = right - left; - float deltaY = bottom - top; + float deltaY = top - bottom; float deltaZ = farZ - nearZ; + if (!deltaX || !deltaY || !deltaZ) + return; ortho.setM11(2.0f / deltaX); - ortho.setM22(2.0 / deltaY); - ortho.setM33(2.0f / deltaZ); ortho.setM41(-(right + left) / deltaX); + ortho.setM22(2.0f / deltaY); ortho.setM42(-(top + bottom) / deltaY); - ortho.setM43(-(farZ + nearZ) / deltaZ); - ortho.setM44(1); + ortho.setM33(-2.0f / deltaZ); + ortho.setM43(-(nearZ + farZ) / deltaZ); } ///////////////////////////////////////////////////////////////////////////////////////// |