f15a83f581
This change adds a crop rectangle specified in window coordinates to the layer state. The all window pixels outside this crop rectangle are treated as though they were fully transparent. This change also adds the plumbing necessary for WindowManager to set that crop. Change-Id: I582bc445dc8c97d4c943d4db8d582a6ef5a66081
117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <system/graphics.h>
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#include <ui/Rect.h>
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namespace android {
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static inline int32_t min(int32_t a, int32_t b) {
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return (a<b) ? a : b;
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}
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static inline int32_t max(int32_t a, int32_t b) {
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return (a>b) ? a : b;
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}
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void Rect::makeInvalid() {
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left = 0;
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top = 0;
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right = -1;
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bottom = -1;
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}
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bool Rect::operator < (const Rect& rhs) const
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{
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if (top<rhs.top) {
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return true;
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} else if (top == rhs.top) {
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if (left < rhs.left) {
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return true;
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} else if (left == rhs.left) {
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if (bottom<rhs.bottom) {
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return true;
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} else if (bottom == rhs.bottom) {
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if (right<rhs.right) {
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return true;
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}
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}
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}
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}
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return false;
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}
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Rect& Rect::offsetTo(int32_t x, int32_t y)
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{
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right -= left - x;
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bottom -= top - y;
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left = x;
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top = y;
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return *this;
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}
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Rect& Rect::offsetBy(int32_t x, int32_t y)
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{
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left += x;
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top += y;
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right+= x;
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bottom+=y;
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return *this;
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}
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const Rect Rect::operator + (const Point& rhs) const
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{
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const Rect result(left+rhs.x, top+rhs.y, right+rhs.x, bottom+rhs.y);
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return result;
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}
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const Rect Rect::operator - (const Point& rhs) const
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{
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const Rect result(left-rhs.x, top-rhs.y, right-rhs.x, bottom-rhs.y);
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return result;
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}
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bool Rect::intersect(const Rect& with, Rect* result) const
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{
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result->left = max(left, with.left);
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result->top = max(top, with.top);
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result->right = min(right, with.right);
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result->bottom = min(bottom, with.bottom);
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return !(result->isEmpty());
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}
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Rect Rect::transform(uint32_t xform, int32_t width, int32_t height) const {
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Rect result(*this);
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if (xform & HAL_TRANSFORM_FLIP_H) {
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result = Rect(width - result.right, result.top,
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width - result.left, result.bottom);
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}
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if (xform & HAL_TRANSFORM_FLIP_V) {
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result = Rect(result.left, height - result.bottom,
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result.right, height - result.top);
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}
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if (xform & HAL_TRANSFORM_ROT_90) {
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int left = height - result.bottom;
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int top = result.left;
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int right = height - result.top;
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int bottom = result.right;
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result = Rect(left, top, right, bottom);
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}
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return result;
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}
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}; // namespace android
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