Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/glVertexBuffer.cpp

@@ -0,0 +1,107 @@
+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#include "glLoader.h"
+
+#include "../osd/glVertexBuffer.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+GLVertexBuffer::GLVertexBuffer(int numElements, int numVertices)
+    : _numElements(numElements),
+      _numVertices(numVertices),
+      _vbo(0) {
+
+    // Initialize internal OpenGL loader library if necessary
+    OpenSubdiv::internal::GLLoader::libraryInitializeGL();
+}
+
+GLVertexBuffer::~GLVertexBuffer() {
+
+    glDeleteBuffers(1, &_vbo);
+}
+
+GLVertexBuffer *
+GLVertexBuffer::Create(int numElements, int numVertices, void *) {
+
+    GLVertexBuffer *instance =
+        new GLVertexBuffer(numElements, numVertices);
+    if (instance->allocate()) return instance;
+    delete instance;
+    return 0;
+}
+
+void
+GLVertexBuffer::UpdateData(const float *src, int startVertex, int numVertices,
+                           void * /*deviceContext*/) {
+
+    int size = numVertices * _numElements * (int) sizeof(float);
+#if defined(GL_ARB_direct_state_access)
+    if (OSD_OPENGL_HAS(ARB_direct_state_access)) {
+        glNamedBufferSubData(_vbo,
+                             startVertex * _numElements * sizeof(float),
+size, src);
+    } else
+#endif
+    {
+        glBindBuffer(GL_ARRAY_BUFFER, _vbo);
+        glBufferSubData(GL_ARRAY_BUFFER,
+                        startVertex * _numElements * sizeof(float), size, src);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+    }
+}
+
+int
+GLVertexBuffer::GetNumElements() const {
+
+    return _numElements;
+}
+
+int
+GLVertexBuffer::GetNumVertices() const {
+
+    return _numVertices;
+}
+
+GLVertexBuffer::ID
+GLVertexBuffer::BindVBO(void * /*deviceContext*/) {
+
+    return _vbo;
+}
+
+bool
+GLVertexBuffer::allocate() {
+
+    int size = _numElements * _numVertices * (int) sizeof(float);
+
+
+#if defined(GL_ARB_direct_state_access)
+    if (OSD_OPENGL_HAS(ARB_direct_state_access)) {
+        glCreateBuffers(1, &_vbo);
+        glNamedBufferDataEXT(_vbo, size, 0, GL_DYNAMIC_DRAW);
+    } else
+#endif
+    {
+        GLint prev = 0;
+        glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &prev);
+        glGenBuffers(1, &_vbo);
+        glBindBuffer(GL_ARRAY_BUFFER, _vbo);
+        glBufferData(GL_ARRAY_BUFFER, size, 0, GL_DYNAMIC_DRAW);
+        glBindBuffer(GL_ARRAY_BUFFER, prev);
+    }
+
+    return true;
+}
+
+}  // end namespace Osd
+
+} // end namespace OPENSUBDIV_VERSION
+} // end namespace OpenSubdiv
+