mirror of
https://github.com/smallmain/cocos-enhance-kit.git
synced 2025-01-14 06:51:08 +00:00
150 lines
3.8 KiB
C++
150 lines
3.8 KiB
C++
/****************************************************************************
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Copyright (c) 2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "VertexBuffer.h"
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#include "DeviceGraphics.h"
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#include "base/CCGLUtils.h"
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RENDERER_BEGIN
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VertexBuffer::VertexBuffer()
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: _device(nullptr)
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, _usage(Usage::STATIC)
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, _numVertices(0)
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, _bytes(0)
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{
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}
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VertexBuffer::~VertexBuffer()
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{
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destroy();
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}
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bool VertexBuffer::init(DeviceGraphics* device, VertexFormat* format, Usage usage, const void* data, size_t dataByteLength, uint32_t numVertices)
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{
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_device = device;
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setFormat(format);
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_usage = usage;
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_numVertices = numVertices;
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_needExpandDataStore = true;
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// calculate bytes
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_bytes = _format->_bytes * numVertices;
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// update
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glGenBuffers(1, &_glID);
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update(0, data, dataByteLength);
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// stats
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//REFINE: device._stats.ib += _bytes;
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return true;
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}
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void VertexBuffer::setFormat(VertexFormat* format)
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{
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if (_format == format)
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return;
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CC_SAFE_RELEASE(_format);
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_format = format;
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CC_SAFE_RETAIN(_format);
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}
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void VertexBuffer::update(uint32_t offset, const void* data, size_t dataByteLength)
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{
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if(data == nullptr || dataByteLength == 0)
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{
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return;
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}
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if (_glID == 0)
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{
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RENDERER_LOGE("The buffer is destroyed");
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return;
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}
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if (dataByteLength + offset > _bytes)
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{
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if (offset) {
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RENDERER_LOGE("Failed to update index buffer data, bytes exceed.");
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return;
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}
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else {
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_needExpandDataStore = true;
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_bytes = offset + dataByteLength;
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_numVertices = _bytes / _format->_bytes;
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}
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}
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GLenum glUsage = (GLenum)_usage;
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ccBindBuffer(GL_ARRAY_BUFFER, _glID);
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if (_needExpandDataStore)
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{
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glBufferData(GL_ARRAY_BUFFER, _bytes, (const GLvoid*)data, glUsage);
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_needExpandDataStore = false;
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}
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else
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{
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glBufferSubData(GL_ARRAY_BUFFER, (GLintptr)offset, (GLsizeiptr)dataByteLength, (const GLvoid*)data);
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}
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ccBindBuffer(GL_ARRAY_BUFFER, 0);
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}
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void VertexBuffer::destroy()
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{
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if (_glID == 0)
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return;
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CC_SAFE_RELEASE_NULL(_format);
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ccDeleteBuffers(1, &_glID);
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//REFINE: _device._stats.ib -= _bytes;
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_glID = 0;
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}
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#if GFX_DEBUG > 0
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static void testVertexBuffer()
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{
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VertexFormat vertexFmt({
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{ ATTRIB_NAME_POSITION, AttribType::FLOAT32, 2 }
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});
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DeviceGraphics* device = nullptr;
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float vertex[] = {
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-1, 0, 0
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-1, 1, 1
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};
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VertexBuffer* buffer = new VertexBuffer();
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buffer->init(device, vertexFmt, Usage::STATIC, vertex, sizeof(vertex), 3);
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buffer->release();
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}
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#endif
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RENDERER_END
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