Add Chromium-only Blender WebEngine parity work

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

@@ -0,0 +1,155 @@
+//
+//   Copyright 2015 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#include "glLoader.h"
+
+#include "../osd/glPatchTable.h"
+
+#include "../far/patchTable.h"
+#include "../osd/cpuPatchTable.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+GLPatchTable::GLPatchTable() :
+    _patchIndexBuffer(0), _patchParamBuffer(0),
+    _patchIndexTexture(0), _patchParamTexture(0) {
+
+    // Initialize internal OpenGL loader library if necessary
+    OpenSubdiv::internal::GLLoader::libraryInitializeGL();
+}
+
+GLPatchTable::~GLPatchTable() {
+    if (_patchIndexBuffer) glDeleteBuffers(1, &_patchIndexBuffer);
+    if (_patchParamBuffer) glDeleteBuffers(1, &_patchParamBuffer);
+    if (_patchIndexTexture) glDeleteTextures(1, &_patchIndexTexture);
+    if (_patchParamTexture) glDeleteTextures(1, &_patchParamTexture);
+    if (_varyingIndexBuffer) glDeleteBuffers(1, &_varyingIndexBuffer);
+    if (_varyingIndexTexture) glDeleteTextures(1, &_varyingIndexTexture);
+    for (int fvc=0; fvc<(int)_fvarIndexBuffers.size(); ++fvc) {
+        if (_fvarIndexBuffers[fvc]) glDeleteBuffers(1, &_fvarIndexBuffers[fvc]);
+    }
+    for (int fvc=0; fvc<(int)_fvarIndexTextures.size(); ++fvc) {
+        if (_fvarIndexTextures[fvc]) glDeleteTextures(1, &_fvarIndexTextures[fvc]);
+    }
+}
+
+GLPatchTable *
+GLPatchTable::Create(Far::PatchTable const *farPatchTable,
+                     void * /*deviceContext*/) {
+    GLPatchTable *instance = new GLPatchTable();
+    if (instance->allocate(farPatchTable)) return instance;
+    delete instance;
+    return 0;
+}
+
+bool
+GLPatchTable::allocate(Far::PatchTable const *farPatchTable) {
+    glGenBuffers(1, &_patchIndexBuffer);
+    glGenBuffers(1, &_patchParamBuffer);
+
+    CpuPatchTable patchTable(farPatchTable);
+
+    size_t numPatchArrays = patchTable.GetNumPatchArrays();
+    GLsizei indexSize = (GLsizei)patchTable.GetPatchIndexSize();
+    GLsizei patchParamSize = (GLsizei)patchTable.GetPatchParamSize();
+
+    // copy patch array
+    _patchArrays.assign(patchTable.GetPatchArrayBuffer(),
+                        patchTable.GetPatchArrayBuffer() + numPatchArrays);
+
+    // copy index buffer
+    glBindBuffer(GL_ARRAY_BUFFER, _patchIndexBuffer);
+    glBufferData(GL_ARRAY_BUFFER,
+                 indexSize * sizeof(GLint),
+                 patchTable.GetPatchIndexBuffer(),
+                 GL_STATIC_DRAW);
+
+    // copy patchparam buffer
+    glBindBuffer(GL_ARRAY_BUFFER, _patchParamBuffer);
+    glBufferData(GL_ARRAY_BUFFER,
+                 patchParamSize * sizeof(PatchParam),
+                 patchTable.GetPatchParamBuffer(),
+                 GL_STATIC_DRAW);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+    // make both buffer as texture buffers too.
+    glGenTextures(1, &_patchIndexTexture);
+    glGenTextures(1, &_patchParamTexture);
+
+    glBindTexture(GL_TEXTURE_BUFFER, _patchIndexTexture);
+    glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, _patchIndexBuffer);
+
+    glBindTexture(GL_TEXTURE_BUFFER, _patchParamTexture);
+    glTexBuffer(GL_TEXTURE_BUFFER, GL_RGB32I, _patchParamBuffer);
+
+    // varying
+    _varyingPatchArrays.assign(
+        patchTable.GetVaryingPatchArrayBuffer(),
+        patchTable.GetVaryingPatchArrayBuffer() + numPatchArrays);
+
+    glGenBuffers(1, &_varyingIndexBuffer);
+    glBindBuffer(GL_ARRAY_BUFFER, _varyingIndexBuffer);
+    glBufferData(GL_ARRAY_BUFFER,
+                 patchTable.GetVaryingPatchIndexSize() * sizeof(GLint),
+                 patchTable.GetVaryingPatchIndexBuffer(),
+                 GL_STATIC_DRAW);
+
+    glGenTextures(1, &_varyingIndexTexture);
+    glBindTexture(GL_TEXTURE_BUFFER, _varyingIndexTexture);
+    glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, _varyingIndexBuffer);
+
+    // face-varying
+    int numFVarChannels = patchTable.GetNumFVarChannels();
+    _fvarPatchArrays.resize(numFVarChannels);
+    _fvarIndexBuffers.resize(numFVarChannels);
+    _fvarIndexTextures.resize(numFVarChannels);
+    _fvarParamBuffers.resize(numFVarChannels);
+    _fvarParamTextures.resize(numFVarChannels);
+    for (int fvc=0; fvc<numFVarChannels; ++fvc) {
+        _fvarPatchArrays[fvc].assign(
+            patchTable.GetFVarPatchArrayBuffer(fvc),
+            patchTable.GetFVarPatchArrayBuffer(fvc) + numPatchArrays);
+
+        glGenBuffers(1, &_fvarIndexBuffers[fvc]);
+        glBindBuffer(GL_ARRAY_BUFFER, _fvarIndexBuffers[fvc]);
+        glBufferData(GL_ARRAY_BUFFER,
+                     patchTable.GetFVarPatchIndexSize(fvc) * sizeof(GLint),
+                     patchTable.GetFVarPatchIndexBuffer(fvc),
+                 GL_STATIC_DRAW);
+
+        glGenTextures(1, &_fvarIndexTextures[fvc]);
+        glBindTexture(GL_TEXTURE_BUFFER, _fvarIndexTextures[fvc]);
+        glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, _fvarIndexBuffers[fvc]);
+
+        glGenBuffers(1, &_fvarParamBuffers[fvc]);
+        glBindBuffer(GL_ARRAY_BUFFER, _fvarParamBuffers[fvc]);
+        glBufferData(GL_ARRAY_BUFFER,
+                     patchTable.GetFVarPatchParamSize(fvc) * sizeof(PatchParam),
+                     patchTable.GetFVarPatchParamBuffer(fvc),
+                 GL_STATIC_DRAW);
+
+        glGenTextures(1, &_fvarParamTextures[fvc]);
+        glBindTexture(GL_TEXTURE_BUFFER, _fvarParamTextures[fvc]);
+        glTexBuffer(GL_TEXTURE_BUFFER, GL_RGB32I, _fvarParamBuffers[fvc]);
+        glBindTexture(GL_TEXTURE_BUFFER, 0);
+    }
+
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindTexture(GL_TEXTURE_BUFFER, 0);
+
+    return true;
+}
+
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+}  // end namespace OpenSubdiv
+