From d38f137e9b813f8193675ebd3dfbfe8bc42639e9 Mon Sep 17 00:00:00 2001
From: "bsalomon@google.com"
 <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81>
Date: Wed, 12 Oct 2011 19:53:16 +0000
Subject: Move gpu/include/* to include/gpu and gpu/src/* to src/gpu Review
 URL: http://codereview.appspot.com/5250070/

git-svn-id: http://skia.googlecode.com/svn/trunk@2471 2bbb7eff-a529-9590-31e7-b0007b416f81
---
 src/gpu/GrGLIRect.h | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/gpu/GrGLIRect.h

(limited to 'src/gpu/GrGLIRect.h')

diff --git a/src/gpu/GrGLIRect.h b/src/gpu/GrGLIRect.h
new file mode 100644
index 0000000000..e94fa21a5a
--- /dev/null
+++ b/src/gpu/GrGLIRect.h
@@ -0,0 +1,74 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+
+#ifndef GrGLIRect_DEFINED
+#define GrGLIRect_DEFINED
+
+#include "GrGLInterface.h"
+
+/**
+ * Helper struct for dealing with the fact that Ganesh and GL use different
+ * window coordinate systems (top-down vs bottom-up)
+ */
+struct GrGLIRect {
+    GrGLint   fLeft;
+    GrGLint   fBottom;
+    GrGLsizei fWidth;
+    GrGLsizei fHeight;
+
+    void pushToGLViewport(const GrGLInterface* gl) const {
+        GR_GL_CALL(gl, Viewport(fLeft, fBottom, fWidth, fHeight));
+    }
+
+    void pushToGLScissor(const GrGLInterface* gl) const {
+        GR_GL_CALL(gl, Scissor(fLeft, fBottom, fWidth, fHeight));
+    }
+
+    void setFromGLViewport(const GrGLInterface* gl) {
+        GR_STATIC_ASSERT(sizeof(GrGLIRect) == 4*sizeof(GrGLint));
+        GR_GL_GetIntegerv(gl, GR_GL_VIEWPORT, (GrGLint*) this);
+    }
+
+    // sometimes we have a GrIRect from the client that we
+    // want to simultaneously make relative to GL's viewport
+    // and convert from top-down to bottom-up.
+    void setRelativeTo(const GrGLIRect& glRect,
+                       int leftOffset,
+                       int topOffset,
+                       int width,
+                       int height) {
+        fLeft = glRect.fLeft + leftOffset;
+        fWidth = width;
+        fBottom = glRect.fBottom + (glRect.fHeight - topOffset - height);
+        fHeight = height;
+
+        GrAssert(fLeft >= 0);
+        GrAssert(fWidth >= 0);
+        GrAssert(fBottom >= 0);
+        GrAssert(fHeight >= 0);
+    }
+
+    bool contains(const GrGLIRect& glRect) const {
+        return fLeft <= glRect.fLeft &&
+               fBottom <= glRect.fBottom &&
+               fLeft + fWidth >=  glRect.fLeft + glRect.fWidth &&
+               fBottom + fHeight >=  glRect.fBottom + glRect.fHeight;
+    }
+
+    void invalidate() {fLeft = fWidth = fBottom = fHeight = -1;}
+
+    bool operator ==(const GrGLIRect& glRect) const {
+        return 0 == memcmp(this, &glRect, sizeof(GrGLIRect));
+    }
+
+    bool operator !=(const GrGLIRect& glRect) const {return !(*this == glRect);}
+};
+
+#endif
-- 
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