Add entities for convolutional layers.

src/FlatLayerVisualisation.cpp

@@ -88,6 +88,6 @@ void FlatLayerVisualisation::render()
     glColorPointer(3, GL_FLOAT, 0, colorBuffer.get());
     glDrawElements(GL_TRIANGLES, faceCount * 3, GL_UNSIGNED_INT, indexBuffer.get());
 
-    glDisable(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_VERTEX_ARRAY);
-    glDisable(GL_COLOR_ARRAY);
+    glDisableClientState(GL_COLOR_ARRAY);
 }

src/MultiImageVisualisation.cpp

@@ -15,6 +15,10 @@ MultiImageVisualisation::MultiImageVisualisation(const fmri::LayerData &layer)
             width = dimensions[2],
             height = dimensions[3];
 
+    CHECK_EQ(1, images) << "Only single input image is supported" << endl;
+
+    vertexBuffer = std::make_unique<float[]>(channels * 12);
+
     auto dataPtr = layer.data();
     for (auto i = 0; i < images; ++i) {
         for (auto j = 0; j < channels; ++j) {
@@ -22,6 +26,36 @@ MultiImageVisualisation::MultiImageVisualisation(const fmri::LayerData &layer)
             dataPtr += width * height;
         }
     }
+
+    int columns = sqrt(channels);
+    while (channels % columns) columns++;
+    int rows = channels / columns;
+
+    // Create the quads for the images.
+    int r = 0, c = 0;
+    int v = 0;
+    for (int i = 0; i < channels; ++i) {
+        vertexBuffer[v++] = 0;
+        vertexBuffer[v++] = 0 + 3 * r;
+        vertexBuffer[v++] = 0 - 3 * c;
+
+        vertexBuffer[v++] = 0;
+        vertexBuffer[v++] = 2 + 3 * r;
+        vertexBuffer[v++] = 0 - 3 * c;
+
+        vertexBuffer[v++] = 0;
+        vertexBuffer[v++] = 2 + 3 * r;
+        vertexBuffer[v++] = 2 - 3 * c;
+
+        vertexBuffer[v++] = 0;
+        vertexBuffer[v++] = 0 + 3 * r;
+        vertexBuffer[v++] = 2 - 3 * c;
+
+        if (++c >= columns) {
+            c = 0;
+            ++r;
+        }
+    }
 }
 
 MultiImageVisualisation::~MultiImageVisualisation()
@@ -33,5 +67,9 @@ MultiImageVisualisation::~MultiImageVisualisation()
 
 void MultiImageVisualisation::render()
 {
-    // TODO: do something.
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glColor3f(1, 1, 1);
+    glVertexPointer(3, GL_FLOAT, 0, vertexBuffer.get());
+    glDrawArrays(GL_QUADS, 0, 4 * textureReferences.size());
+    glDisableClientState(GL_VERTEX_ARRAY);
 }

src/MultiImageVisualisation.hpp

@@ -2,6 +2,7 @@
 
 #include <GL/glew.h>
 #include <map>
+#include <memory>
 #include "LayerVisualisation.hpp"
 #include "LayerData.hpp"
 
@@ -17,5 +18,6 @@ namespace fmri
 
     private:
         std::map<std::pair<int, int>, GLuint> textureReferences;
+        std::unique_ptr<float[]> vertexBuffer;
     };
 }