gfx/skia/trunk/src/gpu/GrGeometryBuffer.h@6474c204b198 (annotated)
gfx/skia/trunk/src/gpu/GrGeometryBuffer.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2011 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | #ifndef GrGeometryBuffer_DEFINED |
| michael@0 | 11 | #define GrGeometryBuffer_DEFINED |
| michael@0 | 12 | |
| michael@0 | 13 | #include "GrResource.h" |
| michael@0 | 14 | |
| michael@0 | 15 | class GrGpu; |
| michael@0 | 16 | |
| michael@0 | 17 | /** |
| michael@0 | 18 | * Parent class for vertex and index buffers |
| michael@0 | 19 | */ |
| michael@0 | 20 | class GrGeometryBuffer : public GrResource { |
| michael@0 | 21 | public: |
| michael@0 | 22 | SK_DECLARE_INST_COUNT(GrGeometryBuffer); |
| michael@0 | 23 | |
| michael@0 | 24 | /** |
| michael@0 | 25 | *Retrieves whether the buffer was created with the dynamic flag |
| michael@0 | 26 | * |
| michael@0 | 27 | * @return true if the buffer was created with the dynamic flag |
| michael@0 | 28 | */ |
| michael@0 | 29 | bool dynamic() const { return fDynamic; } |
| michael@0 | 30 | |
| michael@0 | 31 | /** |
| michael@0 | 32 | * Returns true if the buffer is a wrapper around a CPU array. If true it |
| michael@0 | 33 | * indicates that lock will always succeed and will be free. |
| michael@0 | 34 | */ |
| michael@0 | 35 | bool isCPUBacked() const { return fCPUBacked; } |
| michael@0 | 36 | |
| michael@0 | 37 | /** |
| michael@0 | 38 | * Locks the buffer to be written by the CPU. |
| michael@0 | 39 | * |
| michael@0 | 40 | * The previous content of the buffer is invalidated. It is an error |
| michael@0 | 41 | * to draw from the buffer while it is locked. It is an error to call lock |
| michael@0 | 42 | * on an already locked buffer. It may fail if the backend doesn't support |
| michael@0 | 43 | * locking the buffer. If the buffer is CPU backed then it will always |
| michael@0 | 44 | * succeed and is a free operation. Must be matched by an unlock() call. |
| michael@0 | 45 | * Currently only one lock at a time is supported (no nesting of |
| michael@0 | 46 | * lock/unlock). |
| michael@0 | 47 | * |
| michael@0 | 48 | * @return a pointer to the data or NULL if the lock fails. |
| michael@0 | 49 | */ |
| michael@0 | 50 | virtual void* lock() = 0; |
| michael@0 | 51 | |
| michael@0 | 52 | /** |
| michael@0 | 53 | * Returns the same ptr that lock() returned at time of lock or NULL if the |
| michael@0 | 54 | * is not locked. |
| michael@0 | 55 | * |
| michael@0 | 56 | * @return ptr to locked buffer data or undefined if buffer is not locked. |
| michael@0 | 57 | */ |
| michael@0 | 58 | virtual void* lockPtr() const = 0; |
| michael@0 | 59 | |
| michael@0 | 60 | /** |
| michael@0 | 61 | * Unlocks the buffer. |
| michael@0 | 62 | * |
| michael@0 | 63 | * The pointer returned by the previous lock call will no longer be valid. |
| michael@0 | 64 | */ |
| michael@0 | 65 | virtual void unlock() = 0; |
| michael@0 | 66 | |
| michael@0 | 67 | /** |
| michael@0 | 68 | Queries whether the buffer has been locked. |
| michael@0 | 69 | |
| michael@0 | 70 | @return true if the buffer is locked, false otherwise. |
| michael@0 | 71 | */ |
| michael@0 | 72 | virtual bool isLocked() const = 0; |
| michael@0 | 73 | |
| michael@0 | 74 | /** |
| michael@0 | 75 | * Updates the buffer data. |
| michael@0 | 76 | * |
| michael@0 | 77 | * The size of the buffer will be preserved. The src data will be |
| michael@0 | 78 | * placed at the beginning of the buffer and any remaining contents will |
| michael@0 | 79 | * be undefined. |
| michael@0 | 80 | * |
| michael@0 | 81 | * @return returns true if the update succeeds, false otherwise. |
| michael@0 | 82 | */ |
| michael@0 | 83 | virtual bool updateData(const void* src, size_t srcSizeInBytes) = 0; |
| michael@0 | 84 | |
| michael@0 | 85 | // GrResource overrides |
| michael@0 | 86 | virtual size_t sizeInBytes() const { return fSizeInBytes; } |
| michael@0 | 87 | |
| michael@0 | 88 | protected: |
| michael@0 | 89 | GrGeometryBuffer(GrGpu* gpu, bool isWrapped, size_t sizeInBytes, bool dynamic, bool cpuBacked) |
| michael@0 | 90 | : INHERITED(gpu, isWrapped) |
| michael@0 | 91 | , fSizeInBytes(sizeInBytes) |
| michael@0 | 92 | , fDynamic(dynamic) |
| michael@0 | 93 | , fCPUBacked(cpuBacked) {} |
| michael@0 | 94 | |
| michael@0 | 95 | private: |
| michael@0 | 96 | size_t fSizeInBytes; |
| michael@0 | 97 | bool fDynamic; |
| michael@0 | 98 | bool fCPUBacked; |
| michael@0 | 99 | |
| michael@0 | 100 | typedef GrResource INHERITED; |
| michael@0 | 101 | }; |
| michael@0 | 102 | |
| michael@0 | 103 | #endif |
