Run copyShader

QTProject/subdivision.cpp

@@ -738,6 +738,9 @@ Subdivision::Result Subdivision::runShader(Input input, Tables &tables) {
     f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
     QTime timer;
     timer.start();
+    runCopyShader(input.vertex_buffer.size(), input.vb_handle, output_handle);
+    int copyTime = timer.elapsed();
+    timer.restart();
     runVertexShader(input.vertex_buffer.size(), input.vb_handle, vertex_indices_handle, vertex_offsets_handle, output_handle);
     int vertexTime = timer.elapsed();
     timer.restart();
@@ -770,10 +773,29 @@ Subdivision::Result Subdivision::runShader(Input input, Tables &tables) {
     f->glDeleteBuffers(1, &vertex_offsets_handle);
     f->glDeleteBuffers(1, &edge_indices_handle);
 
-    qCDebug(log_timing)<<"Compute Shader done. Vertexshader"<<vertexTime<<"ms; EdgeShader"<<edgeTime<<" BufferToCPU"<<bufferbildTime<<"ms";
+    qCDebug(log_timing)<<"Compute Shader done. Copyshader"<<copyTime<<"ms; Vertexshader"<<vertexTime<<"ms; EdgeShader"<<edgeTime<<" BufferToCPU"<<bufferbildTime<<"ms";
     return result;
 }
 
+void Subdivision::runCopyShader(GLuint size, GLuint vb_in, GLuint vb_out) {
+    copyShader->bind();
+
+    f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, vb_in);
+    f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, vb_out);
+
+    // Run the shader
+    f->glDispatchCompute(size, 1, 1);
+
+    // Wait for the shader to complete and the data to be written back to the global memory
+    f->glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
+
+    // Unbind the buffers from the shader
+    f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, 0);
+    f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, 0);
+
+    copyShader->release();
+}
+
 void Subdivision::runVertexShader(GLuint size, GLuint vb_handle, GLuint vertex_indices_handle, GLuint vertex_offsets_handle, GLuint output_handle) {
     vertexShader->bind();
 

QTProject/subdivision.h

@@ -62,6 +62,7 @@ private:
     void updateIndexBuffer(QVector<unsigned int> &index_buffer, QMap<unsigned int, unsigned int> map);
     void findRegular(QVector<unsigned int> index_buffer, QVector<Vertex> vertex_buffer, QVector<unsigned int> &regular, QVector<unsigned int> &irregular);
     Result runShader(Input input, Tables &tables);
+    void runCopyShader(GLuint size, GLuint vb_in, GLuint vb_out);
     void runVertexShader(GLuint size, GLuint vb_handle, GLuint vertex_indices_handle, GLuint vertex_offsets_handle, GLuint output_handle);
     void runEdgeShader(GLuint size, GLuint vb_handle, GLuint edge_indices_handle, GLuint output_handle, GLuint offset);