several addition for binding resources

include/scigl_render/buffer/texture2d.hpp

@@ -15,6 +15,13 @@ public:
   /** activates texture_n for use in shaders */
   static void activate(GLenum texture_n);
 
+  /** 
+   * bind this texture to an image unit for imageLoad 
+   * \param unit the binding unit
+   * \param access GL_READ_ONLY, GL_WRITE_ONLY, or GL_READ_WRITE
+   */
+  void bind_image_unit(GLuint unit, GLenum access) const;
+
   /** binds this texture to GL_TEXTURE_2D */
   void bind() const;
 

include/scigl_render/render/depth_simulator.hpp

@@ -26,11 +26,11 @@ public:
   int get_height();
 
   // the OpenGL texture needed to render depth values
-  static const GLenum FORMAT = GL_RED;
-  static const GLenum TYPE = GL_FLOAT;
-  static const GLint INTERNAL_FORMAT = GL_R32F;
-  static const size_t CHANNELS = 1;
-  static const size_t PIXEL_SIZE = CHANNELS * sizeof(GLfloat);
+  static const GLenum FORMAT;
+  static const GLenum TYPE;
+  static const GLenum INTERNAL_FORMAT;
+  static const size_t CHANNELS;
+  static const size_t PIXEL_SIZE;
 
 private:
   // where and how to render

include/scigl_render/render/rasterizer.hpp

@@ -42,13 +42,13 @@ public:
              size_t views_per_column);
 
   /** activate a view by its 2D coordinates */
-  void activate_view(size_t row, size_t column);
+  void activate_view(size_t row, size_t column) const;
 
   /** as if the rows were concatenated */
-  void activate_view(size_t view);
+  void activate_view(size_t view) const;
 
   /** activate the whole texture view, for example when clearing it */
-  void activate_all();
+  void activate_all() const;
 
   /** 
    * Minimal raster size for the given number of views

src/buffer/texture2d.cpp

@@ -55,6 +55,11 @@ void Texture2D::bind() const
   glBindTexture(GL_TEXTURE_2D, texture);
 }
 
+void Texture2D::bind_image_unit(GLuint unit, GLenum access) const
+{
+  glBindImageTexture(unit, texture, 0, GL_FALSE, 0, access, internal_format);
+}
+
 void Texture2D::unbind() const
 {
   glBindTexture(GL_TEXTURE_2D, 0);

src/render/depth_simulator.cpp

@@ -4,6 +4,12 @@
 
 namespace scigl_render
 {
+const GLenum DepthSimulator::FORMAT = GL_RED;
+const GLenum DepthSimulator::TYPE = GL_FLOAT;
+const GLenum DepthSimulator::INTERNAL_FORMAT = GL_R32F;
+const size_t DepthSimulator::CHANNELS = 1;
+const size_t DepthSimulator::PIXEL_SIZE = CHANNELS * sizeof(GLfloat);
+
 DepthSimulator::DepthSimulator(scigl_render::CvCamera camera,
                                scigl_render::Model model)
     : camera(std::move(camera)),

src/render/rasterizer.cpp

@@ -17,14 +17,14 @@ Rasterizer::Rasterizer(size_t width, size_t height, size_t views_per_row,
   set_views_per_column(views_per_column);
 }
 
-void Rasterizer::activate_view(size_t row, size_t column)
+void Rasterizer::activate_view(size_t row, size_t column) const
 {
   auto xy = view_xy(row, column);
   glScissor(xy.first, xy.second, width, height);
   glViewport(xy.first, xy.second, width, height);
 }
 
-void Rasterizer::activate_view(size_t view)
+void Rasterizer::activate_view(size_t view) const
 {
   auto position = view_position(view);
   size_t row = position.first;
@@ -32,7 +32,7 @@ void Rasterizer::activate_view(size_t view)
   activate_view(position.first, position.second);
 }
 
-void Rasterizer::activate_all()
+void Rasterizer::activate_all() const
 {
   glScissor(0, 0, texture_width, texture_height);
   glViewport(0, 0, texture_width, texture_height);