1 /*
2  * Copyright (c) 2024 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef GLES_GPU_BUFFER_GLES_H
17 #define GLES_GPU_BUFFER_GLES_H
18 
19 #include <cstdint>
20 
21 #include <render/device/gpu_resource_desc.h>
22 #include <render/gles/intf_device_gles.h>
23 #include <render/namespace.h>
24 
25 #include "device/gpu_buffer.h"
26 
27 RENDER_BEGIN_NAMESPACE()
28 class Device;
29 class DeviceGLES;
30 struct GpuBufferPlatformDataGL final : public GpuBufferPlatformData {
31     uint32_t buffer { 0 };
32     uint32_t alignedBindByteSize { 0 };
33     uint32_t alignedByteSize { 0 };
34     // map changes offset if buffered
35     uint32_t currentByteOffset { 0 };
36     // alignedByteSize / mapBufferingCount (if no buffering alignedByteSize == bindMemoryByteSize)
37     uint32_t bindMemoryByteSize { 0 };
38 };
39 
40 class GpuBufferGLES final : public GpuBuffer {
41 public:
42     GpuBufferGLES(Device& device, const GpuBufferDesc& desc);
43     ~GpuBufferGLES();
44 
45     const GpuBufferDesc& GetDesc() const override;
46     const GpuBufferPlatformDataGL& GetPlatformData() const;
47 
48     void* Map() override;
49     void* MapMemory() override;
50     void Unmap() const override;
51 
52 private:
53     DeviceGLES& device_;
54 
55     GpuBufferPlatformDataGL plat_;
56     GpuBufferDesc desc_;
57 
58     // debug assert usage only
59     mutable bool isMapped_ { false };
60 
61     bool isPersistantlyMapped_ { false };
62     bool isMappable_ { false };
63     bool isRingBuffer_ { false };
64 
65     uint8_t* data_ { nullptr };
66 };
67 RENDER_END_NAMESPACE()
68 
69 #endif // GLES_GPU_BUFFER_GLES_H
70