[drape] device-independent viewport

1 files changed, 46 insertions, 0 deletions

diff --git a/drape_frontend/viewport.cpp b/drape_frontend/viewport.cpp
new file mode 100644
index 0000000000..351deafaa9
--- /dev/null
+++ b/drape_frontend/viewport.cpp
@@ -0,0 +1,46 @@
+#include "viewport.hpp"
+#include "../drape/glfunctions.hpp"
+
+namespace df
+{
+  Viewport::Viewport(float pixelRatio,
+                     uint32_t x0, uint32_t y0,
+                     uint32_t w, uint32_t h)
+    : m_pixelRatio(pixelRatio)
+    , m_zero(x0, y0)
+    , m_size(w, h)
+  {
+  }
+
+  void Viewport::SetViewport(uint32_t x0, uint32_t y0, uint32_t w, uint32_t h)
+  {
+    m_zero = m2::PointU(x0 ,y0);
+    m_size = m2::PointU(w, h);
+  }
+
+  uint32_t Viewport::GetX0() const
+  {
+    return m_zero.x;
+  }
+
+  uint32_t Viewport::GetY0() const
+  {
+    return m_zero.y;
+  }
+
+  uint32_t Viewport::GetWidth() const
+  {
+    return m_size.x;
+  }
+
+  uint32_t Viewport::GetHeight() const
+  {
+    return m_size.y;
+  }
+
+  void Viewport::Apply() const
+  {
+    GLFunctions::glViewport(m_zero.x * m_pixelRatio, m_zero.y * m_pixelRatio,
+                            m_size.x * m_pixelRatio, m_size.y * m_pixelRatio);
+  }
+}