8fe72477f2
Add lostContext() to GrContext. Review URL: http://codereview.appspot.com/4328044/ git-svn-id: http://skia.googlecode.com/svn/trunk@1026 2bbb7eff-a529-9590-31e7-b0007b416f81
127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "GrGLVertexBuffer.h"
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#include "GrGpuGL.h"
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#define GPUGL static_cast<GrGpuGL*>(getGpu())
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GrGLVertexBuffer::GrGLVertexBuffer(GrGpuGL* gpu,
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GrGLuint id,
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size_t sizeInBytes,
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bool dynamic)
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: INHERITED(gpu, sizeInBytes, dynamic)
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, fBufferID(id)
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, fLockPtr(NULL) {
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}
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void GrGLVertexBuffer::onRelease() {
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// make sure we've not been abandoned
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if (fBufferID) {
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GPUGL->notifyVertexBufferDelete(this);
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GR_GL(DeleteBuffers(1, &fBufferID));
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fBufferID = 0;
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}
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}
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void GrGLVertexBuffer::onAbandon() {
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fBufferID = 0;
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fLockPtr = NULL;
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}
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void GrGLVertexBuffer::bind() const {
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GR_GL(BindBuffer(GR_GL_ARRAY_BUFFER, fBufferID));
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GPUGL->notifyVertexBufferBind(this);
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}
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GrGLuint GrGLVertexBuffer::bufferID() const {
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return fBufferID;
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}
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void* GrGLVertexBuffer::lock() {
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GrAssert(fBufferID);
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GrAssert(!isLocked());
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if (GPUGL->supportsBufferLocking()) {
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this->bind();
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// Let driver know it can discard the old data
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GR_GL(BufferData(GR_GL_ARRAY_BUFFER, size(), NULL,
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dynamic() ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
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fLockPtr = GR_GL(MapBuffer(GR_GL_ARRAY_BUFFER, GR_GL_WRITE_ONLY));
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return fLockPtr;
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}
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return NULL;
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}
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void* GrGLVertexBuffer::lockPtr() const {
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return fLockPtr;
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}
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void GrGLVertexBuffer::unlock() {
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GrAssert(fBufferID);
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GrAssert(isLocked());
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GrAssert(GPUGL->supportsBufferLocking());
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this->bind();
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GR_GL(UnmapBuffer(GR_GL_ARRAY_BUFFER));
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fLockPtr = NULL;
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}
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bool GrGLVertexBuffer::isLocked() const {
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GrAssert(!this->isValid() || fBufferID);
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#if GR_DEBUG
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if (this->isValid() && GPUGL->supportsBufferLocking()) {
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GrGLint mapped;
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this->bind();
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GR_GL(GetBufferParameteriv(GR_GL_ARRAY_BUFFER, GR_GL_BUFFER_MAPPED, &mapped));
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GrAssert(!!mapped == !!fLockPtr);
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}
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#endif
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return NULL != fLockPtr;
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}
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bool GrGLVertexBuffer::updateData(const void* src, size_t srcSizeInBytes) {
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GrAssert(fBufferID);
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GrAssert(!isLocked());
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if (srcSizeInBytes > size()) {
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return false;
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}
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this->bind();
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GrGLenum usage = dynamic() ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW;
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if (size() == srcSizeInBytes) {
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GR_GL(BufferData(GR_GL_ARRAY_BUFFER, srcSizeInBytes, src, usage));
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} else {
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GR_GL(BufferData(GR_GL_ARRAY_BUFFER, size(), NULL, usage));
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GR_GL(BufferSubData(GR_GL_ARRAY_BUFFER, 0, srcSizeInBytes, src));
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}
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return true;
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}
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bool GrGLVertexBuffer::updateSubData(const void* src,
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size_t srcSizeInBytes,
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size_t offset) {
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GrAssert(fBufferID);
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GrAssert(!isLocked());
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if (srcSizeInBytes + offset > size()) {
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return false;
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}
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this->bind();
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GR_GL(BufferSubData(GR_GL_ARRAY_BUFFER, offset, srcSizeInBytes, src));
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return true;
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}
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