/* * Copyright (c) 2013 The Linux Foundation. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <android/log.h> #include "HwcUtils.h" #include "gfxUtils.h" #include "gfx2DGlue.h" #define LOG_TAG "HwcUtils" #if (LOG_NDEBUG == 0) #define LOGD(args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, ## args) #else #define LOGD(args...) ((void)0) #endif #define LOGE(args...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, ## args) namespace mozilla { /* Utility functions for HwcComposer */ /* static */ bool HwcUtils::PrepareLayerRects(nsIntRect aVisible, const gfx::Matrix& aLayerTransform, const gfx::Matrix& aLayerBufferTransform, nsIntRect aClip, nsIntRect aBufferRect, bool aYFlipped, hwc_rect_t* aSourceCrop, hwc_rect_t* aVisibleRegionScreen) { gfxMatrix aTransform = gfx::ThebesMatrix(aLayerTransform); gfxRect visibleRect(ThebesRect(aVisible)); gfxRect clip(ThebesRect(aClip)); gfxRect visibleRectScreen = aTransform.TransformBounds(visibleRect); // |clip| is guaranteed to be integer visibleRectScreen.IntersectRect(visibleRectScreen, clip); if (visibleRectScreen.IsEmpty()) { return false; } gfxMatrix inverse = gfx::ThebesMatrix(aLayerBufferTransform); inverse.Invert(); gfxRect crop = inverse.TransformBounds(visibleRectScreen); //clip to buffer size crop.IntersectRect(crop, ThebesRect(aBufferRect)); crop.Round(); if (crop.IsEmpty()) { return false; } //propagate buffer clipping back to visible rect gfxMatrix layerBufferTransform = gfx::ThebesMatrix(aLayerBufferTransform); visibleRectScreen = layerBufferTransform.TransformBounds(crop); visibleRectScreen.Round(); // Map from layer space to buffer space crop -= aBufferRect.TopLeft(); if (aYFlipped) { crop.y = aBufferRect.height - (crop.y + crop.height); } aSourceCrop->left = crop.x; aSourceCrop->top = crop.y; aSourceCrop->right = crop.x + crop.width; aSourceCrop->bottom = crop.y + crop.height; aVisibleRegionScreen->left = visibleRectScreen.x; aVisibleRegionScreen->top = visibleRectScreen.y; aVisibleRegionScreen->right = visibleRectScreen.x + visibleRectScreen.width; aVisibleRegionScreen->bottom = visibleRectScreen.y + visibleRectScreen.height; return true; } /* static */ bool HwcUtils::PrepareVisibleRegion(const nsIntRegion& aVisible, const gfx::Matrix& aLayerTransform, const gfx::Matrix& aLayerBufferTransform, nsIntRect aClip, nsIntRect aBufferRect, RectVector* aVisibleRegionScreen, bool& aIsVisible) { const float MIN_SRC_WIDTH = 2.f; const float MIN_SRC_HEIGHT = 2.f; gfxMatrix layerTransform = gfx::ThebesMatrix(aLayerTransform); gfxMatrix layerBufferTransform = gfx::ThebesMatrix(aLayerBufferTransform); gfxRect bufferRect = layerBufferTransform.TransformBounds(ThebesRect(aBufferRect)); gfxMatrix inverse = gfx::ThebesMatrix(aLayerBufferTransform); inverse.Invert(); aIsVisible = false; for (auto iter = aVisible.RectIter(); !iter.Done(); iter.Next()) { gfxRect screenRect = layerTransform.TransformBounds(ThebesRect(iter.Get())); screenRect.IntersectRect(screenRect, bufferRect); screenRect.IntersectRect(screenRect, ThebesRect(aClip)); screenRect.Round(); if (screenRect.IsEmpty()) { continue; } hwc_rect_t visibleRectScreen; visibleRectScreen.left = screenRect.x; visibleRectScreen.top = screenRect.y; visibleRectScreen.right = screenRect.XMost(); visibleRectScreen.bottom = screenRect.YMost(); gfxRect srcCrop = inverse.TransformBounds(screenRect); // When src crop is very small, HWC could not render correctly in some cases. // See Bug 1169093 if(srcCrop.Width() < MIN_SRC_WIDTH || srcCrop.Height() < MIN_SRC_HEIGHT) { return false; } aVisibleRegionScreen->push_back(visibleRectScreen); aIsVisible = true; } return true; } /* static */ bool HwcUtils::CalculateClipRect(const gfx::Matrix& transform, const nsIntRect* aLayerClip, nsIntRect aParentClip, nsIntRect* aRenderClip) { gfxMatrix aTransform = gfx::ThebesMatrix(transform); *aRenderClip = aParentClip; if (!aLayerClip) { return true; } if (aLayerClip->IsEmpty()) { return false; } nsIntRect clip = *aLayerClip; gfxRect r = ThebesRect(clip); gfxRect trClip = aTransform.TransformBounds(r); trClip.Round(); gfxUtils::GfxRectToIntRect(trClip, &clip); aRenderClip->IntersectRect(*aRenderClip, clip); return true; } } // namespace mozilla