1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gonk/HwcUtils.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,121 @@
1.4 +/*
1.5 + * Copyright (c) 2013, The Linux Foundation. All rights reserved.
1.6 + *
1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
1.8 + * you may not use this file except in compliance with the License.
1.9 + * You may obtain a copy of the License at
1.10 + *
1.11 + * http://www.apache.org/licenses/LICENSE-2.0
1.12 + *
1.13 + * Unless required by applicable law or agreed to in writing, software
1.14 + * distributed under the License is distributed on an "AS IS" BASIS,
1.15 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.16 + * See the License for the specific language governing permissions and
1.17 + * limitations under the License.
1.18 + */
1.19 +
1.20 +#ifndef mozilla_HwcUtils
1.21 +#define mozilla_HwcUtils
1.22 +
1.23 +#include "Layers.h"
1.24 +#include <vector>
1.25 +#include "hardware/hwcomposer.h"
1.26 +
1.27 +namespace mozilla {
1.28 +
1.29 +class HwcUtils {
1.30 +public:
1.31 +
1.32 +enum {
1.33 + HWC_USE_GPU = HWC_FRAMEBUFFER,
1.34 + HWC_USE_OVERLAY = HWC_OVERLAY,
1.35 + HWC_USE_COPYBIT
1.36 +};
1.37 +
1.38 +// HWC layer flags
1.39 +enum {
1.40 + // Draw a solid color rectangle
1.41 + // The color should be set on the transform member of the hwc_layer_t struct
1.42 + // The expected format is a 32 bit ABGR with 8 bits per component
1.43 + HWC_COLOR_FILL = 0x8,
1.44 + // Swap the RB pixels of gralloc buffer, like RGBA<->BGRA or RGBX<->BGRX
1.45 + // The flag will be set inside LayerRenderState
1.46 + HWC_FORMAT_RB_SWAP = 0x40
1.47 +};
1.48 +
1.49 +typedef std::vector<hwc_rect_t> RectVector;
1.50 +
1.51 +/* Utility functions - implemented in HwcUtils.cpp */
1.52 +
1.53 +/**
1.54 + * Calculates the layer's clipping rectangle
1.55 + *
1.56 + * @param aTransform Input. A transformation matrix
1.57 + * It transforms the clip rect to screen space
1.58 + * @param aLayerClip Input. The layer's internal clipping rectangle.
1.59 + * This may be NULL which means the layer has no internal clipping
1.60 + * The origin is the top-left corner of the layer
1.61 + * @param aParentClip Input. The parent layer's rendering clipping rectangle
1.62 + * The origin is the top-left corner of the screen
1.63 + * @param aRenderClip Output. The layer's rendering clipping rectangle
1.64 + * The origin is the top-left corner of the screen
1.65 + * @return true if the layer should be rendered.
1.66 + * false if the layer can be skipped
1.67 + */
1.68 +static bool CalculateClipRect(const gfxMatrix& aTransform,
1.69 + const nsIntRect* aLayerClip,
1.70 + nsIntRect aParentClip, nsIntRect* aRenderClip);
1.71 +
1.72 +
1.73 +/**
1.74 + * Prepares hwc layer visible region required for hwc composition
1.75 + *
1.76 + * @param aVisible Input. Layer's unclipped visible region
1.77 + * The origin is the top-left corner of the layer
1.78 + * @param aTransform Input. Layer's transformation matrix
1.79 + * It transforms from layer space to screen space
1.80 + * @param aClip Input. A clipping rectangle.
1.81 + * The origin is the top-left corner of the screen
1.82 + * @param aBufferRect Input. The layer's buffer bounds
1.83 + * The origin is the top-left corner of the layer
1.84 + * @param aVisibleRegionScreen Output. Visible region in screen space.
1.85 + * The origin is the top-left corner of the screen
1.86 + * @return true if the layer should be rendered.
1.87 + * false if the layer can be skipped
1.88 + */
1.89 +static bool PrepareVisibleRegion(const nsIntRegion& aVisible,
1.90 + const gfxMatrix& aTransform,
1.91 + nsIntRect aClip, nsIntRect aBufferRect,
1.92 + RectVector* aVisibleRegionScreen);
1.93 +
1.94 +
1.95 +/**
1.96 + * Sets hwc layer rectangles required for hwc composition
1.97 + *
1.98 + * @param aVisible Input. Layer's unclipped visible rectangle
1.99 + * The origin is the top-left corner of the layer
1.100 + * @param aTransform Input. Layer's transformation matrix
1.101 + * It transforms from layer space to screen space
1.102 + * @param aClip Input. A clipping rectangle.
1.103 + * The origin is the top-left corner of the screen
1.104 + * @param aBufferRect Input. The layer's buffer bounds
1.105 + * The origin is the top-left corner of the layer
1.106 + * @param aYFlipped Input. true if the buffer is rendered as Y flipped
1.107 + * @param aSurceCrop Output. Area of the source to consider,
1.108 + * the origin is the top-left corner of the buffer
1.109 + * @param aVisibleRegionScreen Output. Visible region in screen space.
1.110 + * The origin is the top-left corner of the screen
1.111 + * @return true if the layer should be rendered.
1.112 + * false if the layer can be skipped
1.113 + */
1.114 +static bool PrepareLayerRects(nsIntRect aVisible, const gfxMatrix& aTransform,
1.115 + nsIntRect aClip, nsIntRect aBufferRect,
1.116 + bool aYFlipped,
1.117 + hwc_rect_t* aSourceCrop,
1.118 + hwc_rect_t* aVisibleRegionScreen);
1.119 +
1.120 +};
1.121 +
1.122 +} // namespace mozilla
1.123 +
1.124 +#endif // mozilla_HwcUtils
