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comparison: widget/gonk/HwcUtils.h
widget/gonk/HwcUtils.h
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- changeset 4
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| -1:000000000000 | 0:d3eeccf14c9d |
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| 1 /* | |
| 2 * Copyright (c) 2013, The Linux Foundation. All rights reserved. | |
| 3 * | |
| 4 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 * you may not use this file except in compliance with the License. | |
| 6 * You may obtain a copy of the License at | |
| 7 * | |
| 8 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 * | |
| 10 * Unless required by applicable law or agreed to in writing, software | |
| 11 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 * See the License for the specific language governing permissions and | |
| 14 * limitations under the License. | |
| 15 */ | |
| 16 | |
| 17 #ifndef mozilla_HwcUtils | |
| 18 #define mozilla_HwcUtils | |
| 19 | |
| 20 #include "Layers.h" | |
| 21 #include <vector> | |
| 22 #include "hardware/hwcomposer.h" | |
| 23 | |
| 24 namespace mozilla { | |
| 25 | |
| 26 class HwcUtils { | |
| 27 public: | |
| 28 | |
| 29 enum { | |
| 30 HWC_USE_GPU = HWC_FRAMEBUFFER, | |
| 31 HWC_USE_OVERLAY = HWC_OVERLAY, | |
| 32 HWC_USE_COPYBIT | |
| 33 }; | |
| 34 | |
| 35 // HWC layer flags | |
| 36 enum { | |
| 37 // Draw a solid color rectangle | |
| 38 // The color should be set on the transform member of the hwc_layer_t struct | |
| 39 // The expected format is a 32 bit ABGR with 8 bits per component | |
| 40 HWC_COLOR_FILL = 0x8, | |
| 41 // Swap the RB pixels of gralloc buffer, like RGBA<->BGRA or RGBX<->BGRX | |
| 42 // The flag will be set inside LayerRenderState | |
| 43 HWC_FORMAT_RB_SWAP = 0x40 | |
| 44 }; | |
| 45 | |
| 46 typedef std::vector<hwc_rect_t> RectVector; | |
| 47 | |
| 48 /* Utility functions - implemented in HwcUtils.cpp */ | |
| 49 | |
| 50 /** | |
| 51 * Calculates the layer's clipping rectangle | |
| 52 * | |
| 53 * @param aTransform Input. A transformation matrix | |
| 54 * It transforms the clip rect to screen space | |
| 55 * @param aLayerClip Input. The layer's internal clipping rectangle. | |
| 56 * This may be NULL which means the layer has no internal clipping | |
| 57 * The origin is the top-left corner of the layer | |
| 58 * @param aParentClip Input. The parent layer's rendering clipping rectangle | |
| 59 * The origin is the top-left corner of the screen | |
| 60 * @param aRenderClip Output. The layer's rendering clipping rectangle | |
| 61 * The origin is the top-left corner of the screen | |
| 62 * @return true if the layer should be rendered. | |
| 63 * false if the layer can be skipped | |
| 64 */ | |
| 65 static bool CalculateClipRect(const gfxMatrix& aTransform, | |
| 66 const nsIntRect* aLayerClip, | |
| 67 nsIntRect aParentClip, nsIntRect* aRenderClip); | |
| 68 | |
| 69 | |
| 70 /** | |
| 71 * Prepares hwc layer visible region required for hwc composition | |
| 72 * | |
| 73 * @param aVisible Input. Layer's unclipped visible region | |
| 74 * The origin is the top-left corner of the layer | |
| 75 * @param aTransform Input. Layer's transformation matrix | |
| 76 * It transforms from layer space to screen space | |
| 77 * @param aClip Input. A clipping rectangle. | |
| 78 * The origin is the top-left corner of the screen | |
| 79 * @param aBufferRect Input. The layer's buffer bounds | |
| 80 * The origin is the top-left corner of the layer | |
| 81 * @param aVisibleRegionScreen Output. Visible region in screen space. | |
| 82 * The origin is the top-left corner of the screen | |
| 83 * @return true if the layer should be rendered. | |
| 84 * false if the layer can be skipped | |
| 85 */ | |
| 86 static bool PrepareVisibleRegion(const nsIntRegion& aVisible, | |
| 87 const gfxMatrix& aTransform, | |
| 88 nsIntRect aClip, nsIntRect aBufferRect, | |
| 89 RectVector* aVisibleRegionScreen); | |
| 90 | |
| 91 | |
| 92 /** | |
| 93 * Sets hwc layer rectangles required for hwc composition | |
| 94 * | |
| 95 * @param aVisible Input. Layer's unclipped visible rectangle | |
| 96 * The origin is the top-left corner of the layer | |
| 97 * @param aTransform Input. Layer's transformation matrix | |
| 98 * It transforms from layer space to screen space | |
| 99 * @param aClip Input. A clipping rectangle. | |
| 100 * The origin is the top-left corner of the screen | |
| 101 * @param aBufferRect Input. The layer's buffer bounds | |
| 102 * The origin is the top-left corner of the layer | |
| 103 * @param aYFlipped Input. true if the buffer is rendered as Y flipped | |
| 104 * @param aSurceCrop Output. Area of the source to consider, | |
| 105 * the origin is the top-left corner of the buffer | |
| 106 * @param aVisibleRegionScreen Output. Visible region in screen space. | |
| 107 * The origin is the top-left corner of the screen | |
| 108 * @return true if the layer should be rendered. | |
| 109 * false if the layer can be skipped | |
| 110 */ | |
| 111 static bool PrepareLayerRects(nsIntRect aVisible, const gfxMatrix& aTransform, | |
| 112 nsIntRect aClip, nsIntRect aBufferRect, | |
| 113 bool aYFlipped, | |
| 114 hwc_rect_t* aSourceCrop, | |
| 115 hwc_rect_t* aVisibleRegionScreen); | |
| 116 | |
| 117 }; | |
| 118 | |
| 119 } // namespace mozilla | |
| 120 | |
| 121 #endif // mozilla_HwcUtils |
