Add support for 2D texture arrays to ShaderGenerator and BufferViewer (actual render-to-texture-array functionality to come)

direct/src/showbase/BufferViewer.py

@@ -290,6 +290,17 @@ class BufferViewer(DirectObject):
                             card = NodePath(self.cardmaker.generate())
                             card.setTexture(tex)
                             cards.append(card)
+                    elif (tex.getTextureType() == Texture.TT2dTextureArray):
+                        for layer in range(tex.getZSize()):
+                            self.cardmaker.setUvRange((0, 1, 1, 0), (0, 0, 1, 1),\
+                                                      (layer, layer, layer, layer))
+                            card = NodePath(self.cardmaker.generate())
+                            # 2D texture arrays are not supported by
+                            # the fixed-function pipeline, so we need to
+                            # enable the shader generator to view them.
+                            card.setShaderAuto()
+                            card.setTexture(tex)
+                            cards.append(card)
                     else:
                         card = win.getTextureCard()
                         card.setTexture(tex)

panda/src/pgraph/textureAttrib.cxx

@@ -962,8 +962,10 @@ sort_on_stages() {
   for (si = _on_stages.begin(); si != _on_stages.end(); ++si) {
     StageNode &sn = (*si);
     TextureStage *stage = sn._stage;
+    Texture *texture = sn._texture;
     nassertv(stage != NULL);
-    if (stage->is_fixed_function()) {
+    nassertv(texture != NULL);
+    if (stage->is_fixed_function() && texture->get_texture_type() != Texture::TT_2d_texture_array) {
       const InternalName *name = stage->get_texcoord_name();
 
       // This pair of lines will get the next consecutive texcoord index

panda/src/pgraphnodes/shaderGenerator.cxx

@@ -612,7 +612,7 @@ update_shadow_buffer(NodePath light_np) {
 //               - shadow mapping
 //               - most texgen modes
 //               - texmatrix
-//               - 1D/2D/3D textures, cube textures
+//               - 1D/2D/3D textures, cube textures, 2D tex arrays
 //               - linear/exp/exp2 fog
 //
 //               Not yet supported:
@@ -955,7 +955,8 @@ synthesize_shader(const RenderState *rs) {
     text << "(tex_" << _map_index_height << ", l_texcoord" << _map_index_height << ".";
     switch (tex->get_texture_type()) {
     case Texture::TT_cube_map:
-    case Texture::TT_3d_texture: 
+    case Texture::TT_3d_texture:
+    case Texture::TT_2d_texture_array:
       text << "xyz";
       break;
     case Texture::TT_2d_texture: 
@@ -997,7 +998,8 @@ synthesize_shader(const RenderState *rs) {
       text << "(tex_" << i << ", l_texcoord" << i << ".";
       switch(tex->get_texture_type()) {
       case Texture::TT_cube_map:
-      case Texture::TT_3d_texture: 
+      case Texture::TT_3d_texture:
+      case Texture::TT_2d_texture_array:
         text << "xyz"; 
         break;
       case Texture::TT_2d_texture: 
@@ -1625,6 +1627,9 @@ texture_type_as_string(Texture::TextureType ttype) {
     case Texture::TT_cube_map:
       return "CUBE";
       break;
+    case Texture::TT_2d_texture_array:
+      return "2DARRAY";
+      break;
     default:
       pgraph_cat.error() << "Unsupported texture type!\n";
       return "2D";