e4db79de12
bug:22480459 bug:26358504 Adds complex (non-rectangular) clipping support, and overdraw visualization. Doesn't support stencil clipping in layers. Change-Id: I8d10c7f1d2769ab5756774ca672344cc09901f87
114 lines
2.8 KiB
C++
114 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 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 "renderstate/Scissor.h"
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#include "Rect.h"
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#include <utils/Log.h>
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namespace android {
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namespace uirenderer {
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Scissor::Scissor()
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: mEnabled(false)
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, mScissorX(0)
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, mScissorY(0)
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, mScissorWidth(0)
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, mScissorHeight(0) {
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}
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bool Scissor::setEnabled(bool enabled) {
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if (mEnabled != enabled) {
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if (enabled) {
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glEnable(GL_SCISSOR_TEST);
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} else {
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glDisable(GL_SCISSOR_TEST);
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}
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mEnabled = enabled;
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return true;
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}
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return false;
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}
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bool Scissor::set(GLint x, GLint y, GLint width, GLint height) {
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if (mEnabled && (x != mScissorX || y != mScissorY
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|| width != mScissorWidth || height != mScissorHeight)) {
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if (x < 0) {
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width += x;
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x = 0;
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}
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if (y < 0) {
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height += y;
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y = 0;
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}
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if (width < 0) {
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width = 0;
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}
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if (height < 0) {
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height = 0;
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}
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glScissor(x, y, width, height);
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mScissorX = x;
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mScissorY = y;
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mScissorWidth = width;
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mScissorHeight = height;
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return true;
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}
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return false;
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}
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void Scissor::set(int viewportHeight, const Rect& clip) {
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// transform to Y-flipped GL space, and prevent negatives
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GLint x = std::max(0, (int)clip.left);
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GLint y = std::max(0, viewportHeight - (int)clip.bottom);
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GLint width = std::max(0, ((int)clip.right) - x);
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GLint height = std::max(0, (viewportHeight - (int)clip.top) - y);
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if (x != mScissorX
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|| y != mScissorY
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|| width != mScissorWidth
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|| height != mScissorHeight) {
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glScissor(x, y, width, height);
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mScissorX = x;
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mScissorY = y;
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mScissorWidth = width;
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mScissorHeight = height;
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}
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}
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void Scissor::reset() {
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mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;
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}
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void Scissor::invalidate() {
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mEnabled = glIsEnabled(GL_SCISSOR_TEST);
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setEnabled(true);
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reset();
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}
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void Scissor::dump() {
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ALOGD("Scissor: enabled %d, %d %d %d %d",
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mEnabled, mScissorX, mScissorY, mScissorWidth, mScissorHeight);
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}
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} /* namespace uirenderer */
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} /* namespace android */
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