Add Graphics draw call with baseVertexIndex (offset)

only  supported for opengl 3  and direct3d

Source/Urho3D/Graphics/Direct3D11/D3D11Graphics.cpp

@@ -824,6 +824,31 @@ void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount
     ++numBatches_;
 }
 
+void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, , unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount)
+{
+    if (!vertexCount || !shaderProgram_)
+        return;
+
+    PrepareDraw();
+
+    unsigned primitiveCount;
+    D3D_PRIMITIVE_TOPOLOGY d3dPrimitiveType;
+
+    if (fillMode_ == FILL_POINT)
+        type = POINT_LIST;
+
+    GetD3DPrimitiveType(indexCount, type, primitiveCount, d3dPrimitiveType);
+    if (d3dPrimitiveType != primitiveType_)
+    {
+        impl_->deviceContext_->IASetPrimitiveTopology(d3dPrimitiveType);
+        primitiveType_ = d3dPrimitiveType;
+    }
+    impl_->deviceContext_->DrawIndexed(indexCount, indexStart, baseVertexIndex);
+
+    numPrimitives_ += primitiveCount;
+    ++numBatches_;
+}
+
 void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
     unsigned instanceCount)
 {
@@ -850,6 +875,32 @@ void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned i
     ++numBatches_;
 }
 
+void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount,
+    unsigned instanceCount)
+{
+    if (!indexCount || !instanceCount || !shaderProgram_)
+        return;
+
+    PrepareDraw();
+
+    unsigned primitiveCount;
+    D3D_PRIMITIVE_TOPOLOGY d3dPrimitiveType;
+
+    if (fillMode_ == FILL_POINT)
+        type = POINT_LIST;
+
+    GetD3DPrimitiveType(indexCount, type, primitiveCount, d3dPrimitiveType);
+    if (d3dPrimitiveType != primitiveType_)
+    {
+        impl_->deviceContext_->IASetPrimitiveTopology(d3dPrimitiveType);
+        primitiveType_ = d3dPrimitiveType;
+    }
+    impl_->deviceContext_->DrawIndexedInstanced(indexCount, instanceCount, indexStart, baseVertexIndex, 0);
+
+    numPrimitives_ += instanceCount * primitiveCount;
+    ++numBatches_;
+}
+
 void Graphics::SetVertexBuffer(VertexBuffer* buffer)
 {
     // Note: this is not multi-instance safe

Source/Urho3D/Graphics/Direct3D11/D3D11Graphics.h

@@ -127,9 +127,14 @@ public:
     void Draw(PrimitiveType type, unsigned vertexStart, unsigned vertexCount);
     /// Draw indexed geometry.
     void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount);
+    /// Draw indexed geometry with vertex index offset.
+    void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount);
     /// Draw indexed, instanced geometry. An instancing vertex buffer must be set.
     void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
         unsigned instanceCount);
+    /// Draw indexed, instanced geometry with vertex index offset.
+    void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex,
+        unsigned vertexCount, unsigned instanceCount);
     /// Set vertex buffer.
     void SetVertexBuffer(VertexBuffer* buffer);
     /// Set multiple vertex buffers.

Source/Urho3D/Graphics/Direct3D9/D3D9Graphics.cpp

@@ -909,6 +909,23 @@ void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount
     ++numBatches_;
 }
 
+void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount)
+{
+    if (!indexCount)
+        return;
+
+    ResetStreamFrequencies();
+
+    unsigned primitiveCount;
+    D3DPRIMITIVETYPE d3dPrimitiveType;
+
+    GetD3DPrimitiveType(indexCount, type, primitiveCount, d3dPrimitiveType);
+    impl_->device_->DrawIndexedPrimitive(d3dPrimitiveType, baseVertexIndex, minVertex, vertexCount, indexStart, primitiveCount);
+
+    numPrimitives_ += primitiveCount;
+    ++numBatches_;
+}
+
 void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
     unsigned instanceCount)
 {
@@ -939,6 +956,36 @@ void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned i
     ++numBatches_;
 }
 
+void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex,
+    unsigned vertexCount, unsigned instanceCount)
+{
+    if (!indexCount || !instanceCount)
+        return;
+
+    for (unsigned i = 0; i < MAX_VERTEX_STREAMS; ++i)
+    {
+        VertexBuffer* buffer = vertexBuffers_[i];
+        if (buffer)
+        {
+            const PODVector<VertexElement>& elements = buffer->GetElements();
+            // Check if buffer has per-instance data
+            if (elements.Size() && elements[0].perInstance_)
+                SetStreamFrequency(i, D3DSTREAMSOURCE_INSTANCEDATA | 1u);
+            else
+                SetStreamFrequency(i, D3DSTREAMSOURCE_INDEXEDDATA | instanceCount);
+        }
+    }
+
+    unsigned primitiveCount;
+    D3DPRIMITIVETYPE d3dPrimitiveType;
+
+    GetD3DPrimitiveType(indexCount, type, primitiveCount, d3dPrimitiveType);
+    impl_->device_->DrawIndexedPrimitive(d3dPrimitiveType, baseVertexIndex, minVertex, vertexCount, indexStart, primitiveCount);
+
+    numPrimitives_ += instanceCount * primitiveCount;
+    ++numBatches_;
+}
+
 void Graphics::SetVertexBuffer(VertexBuffer* buffer)
 {
     // Note: this is not multi-instance safe

Source/Urho3D/Graphics/Direct3D9/D3D9Graphics.h

@@ -122,11 +122,16 @@ public:
     bool ResolveToTexture(Texture2D* destination, const IntRect& viewport);
     /// Draw non-indexed geometry.
     void Draw(PrimitiveType type, unsigned vertexStart, unsigned vertexCount);
+    /// Draw indexed geometry with vertex index offset.
+    void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount);
     /// Draw indexed geometry.
     void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount);
     /// Draw indexed, instanced geometry. An instancing vertex buffer must be set.
     void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
         unsigned instanceCount);
+    /// Draw indexed, instanced geometry with vertex index offset.
+    void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex,
+        unsigned vertexCount, unsigned instanceCount);
     /// Set vertex buffer.
     void SetVertexBuffer(VertexBuffer* buffer);
     /// Set multiple vertex buffers.

Source/Urho3D/Graphics/OpenGL/OGLGraphics.cpp

@@ -829,6 +829,29 @@ void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount
     ++numBatches_;
 }
 
+void Graphics::Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount)
+{
+#if !defined(GL_ES_VERSION_2_0)
+#if defined(GLEW_ARB_draw_elements_base_vertex)
+    if (!indexCount || !indexBuffer_ || !indexBuffer_->GetGPUObject())
+        return;
+
+    PrepareDraw();
+
+    unsigned indexSize = indexBuffer_->GetIndexSize();
+    unsigned primitiveCount;
+    GLenum glPrimitiveType;
+
+    GetGLPrimitiveType(indexCount, type, primitiveCount, glPrimitiveType);
+    GLenum indexType = indexSize == sizeof(unsigned short) ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT;
+    glDrawElementsBaseVertex(glPrimitiveType, indexCount, indexType, reinterpret_cast<GLvoid*>(indexStart * indexSize), baseVertexIndex);
+
+    numPrimitives_ += primitiveCount;
+    ++numBatches_;
+#endif
+#endif
+}
+
 void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
     unsigned instanceCount)
 {
@@ -865,6 +888,31 @@ void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned i
 #endif
 }
 
+void Graphics::DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, 
+        unsigned vertexCount, unsigned instanceCount)
+{
+#if !defined(GL_ES_VERSION_2_0)
+#if defined(GLEW_ARB_draw_elements_base_vertex)
+    if (!indexCount || !indexBuffer_ || !indexBuffer_->GetGPUObject() || !instancingSupport_)
+        return;
+
+    PrepareDraw();
+
+    unsigned indexSize = indexBuffer_->GetIndexSize();
+    unsigned primitiveCount;
+    GLenum glPrimitiveType;
+
+    GetGLPrimitiveType(indexCount, type, primitiveCount, glPrimitiveType);
+    GLenum indexType = indexSize == sizeof(unsigned short) ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT;
+
+    glDrawElementsInstancedBaseVertex(glPrimitiveType, indexCount, indexType, reinterpret_cast<const GLvoid*>(indexStart * indexSize),
+        instanceCount, baseVertexIndex);
+
+    numPrimitives_ += instanceCount * primitiveCount;
+    ++numBatches_;
+#endif
+#endif
+}
 void Graphics::SetVertexBuffer(VertexBuffer* buffer)
 {
     // Note: this is not multi-instance safe

Source/Urho3D/Graphics/OpenGL/OGLGraphics.h

@@ -126,9 +126,14 @@ public:
     void Draw(PrimitiveType type, unsigned vertexStart, unsigned vertexCount);
     /// Draw indexed geometry.
     void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount);
+    /// Draw indexed geometry with vertex index offset. ONLY supported if the GL version is 3.2 or greater!
+    void Draw(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, unsigned vertexCount);
     /// Draw indexed, instanced geometry.
     void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned minVertex, unsigned vertexCount,
         unsigned instanceCount);
+    /// Draw indexed, instanced geometry with vertex index offset. ONLY supported if the GL version is 3.2 or greater!
+    void DrawInstanced(PrimitiveType type, unsigned indexStart, unsigned indexCount, unsigned baseVertexIndex, unsigned minVertex, 
+        unsigned vertexCount, unsigned instanceCount);
     /// Set vertex buffer.
     void SetVertexBuffer(VertexBuffer* buffer);
     /// Set multiple vertex buffers.