1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/gl/GrGLIRect.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,79 @@
1.4 +/*
1.5 + * Copyright 2011 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +
1.12 +
1.13 +#ifndef GrGLIRect_DEFINED
1.14 +#define GrGLIRect_DEFINED
1.15 +
1.16 +#include "gl/GrGLInterface.h"
1.17 +#include "GrGLUtil.h"
1.18 +
1.19 +/**
1.20 + * Helper struct for dealing with the fact that Ganesh and GL use different
1.21 + * window coordinate systems (top-down vs bottom-up)
1.22 + */
1.23 +struct GrGLIRect {
1.24 + GrGLint fLeft;
1.25 + GrGLint fBottom;
1.26 + GrGLsizei fWidth;
1.27 + GrGLsizei fHeight;
1.28 +
1.29 + void pushToGLViewport(const GrGLInterface* gl) const {
1.30 + GR_GL_CALL(gl, Viewport(fLeft, fBottom, fWidth, fHeight));
1.31 + }
1.32 +
1.33 + void pushToGLScissor(const GrGLInterface* gl) const {
1.34 + GR_GL_CALL(gl, Scissor(fLeft, fBottom, fWidth, fHeight));
1.35 + }
1.36 +
1.37 + void setFromGLViewport(const GrGLInterface* gl) {
1.38 + GR_STATIC_ASSERT(sizeof(GrGLIRect) == 4*sizeof(GrGLint));
1.39 + GR_GL_GetIntegerv(gl, GR_GL_VIEWPORT, (GrGLint*) this);
1.40 + }
1.41 +
1.42 + // sometimes we have a SkIRect from the client that we
1.43 + // want to simultaneously make relative to GL's viewport
1.44 + // and (optionally) convert from top-down to bottom-up.
1.45 + void setRelativeTo(const GrGLIRect& glRect,
1.46 + int leftOffset,
1.47 + int topOffset,
1.48 + int width,
1.49 + int height,
1.50 + GrSurfaceOrigin origin) {
1.51 + fLeft = glRect.fLeft + leftOffset;
1.52 + fWidth = width;
1.53 + if (kBottomLeft_GrSurfaceOrigin == origin) {
1.54 + fBottom = glRect.fBottom + (glRect.fHeight - topOffset - height);
1.55 + } else {
1.56 + fBottom = glRect.fBottom + topOffset;
1.57 + }
1.58 + fHeight = height;
1.59 +
1.60 + SkASSERT(fLeft >= 0);
1.61 + SkASSERT(fWidth >= 0);
1.62 + SkASSERT(fBottom >= 0);
1.63 + SkASSERT(fHeight >= 0);
1.64 + }
1.65 +
1.66 + bool contains(const GrGLIRect& glRect) const {
1.67 + return fLeft <= glRect.fLeft &&
1.68 + fBottom <= glRect.fBottom &&
1.69 + fLeft + fWidth >= glRect.fLeft + glRect.fWidth &&
1.70 + fBottom + fHeight >= glRect.fBottom + glRect.fHeight;
1.71 + }
1.72 +
1.73 + void invalidate() {fLeft = fWidth = fBottom = fHeight = -1;}
1.74 +
1.75 + bool operator ==(const GrGLIRect& glRect) const {
1.76 + return 0 == memcmp(this, &glRect, sizeof(GrGLIRect));
1.77 + }
1.78 +
1.79 + bool operator !=(const GrGLIRect& glRect) const {return !(*this == glRect);}
1.80 +};
1.81 +
1.82 +#endif
