Made glwrapper use proper dynamic dispatch for modularity.

1 files changed, 83 insertions, 0 deletions

diff --git a/crawl-ref/source/glwrapper.cc b/crawl-ref/source/glwrapper.cc
new file mode 100644
index 0000000000..f65cf5040e
--- /dev/null
+++ b/crawl-ref/source/glwrapper.cc
@@ -0,0 +1,83 @@
+#ifdef USE_TILE
+#include "glwrapper.h"
+
+#ifdef USE_GL
+#include "glwrapper-ogl.h"
+#endif
+
+/////////////////////////////////////////////////////////////////////////////
+// GLPrimitive
+GLPrimitive::GLPrimitive(long unsigned int sz, size_t ct, unsigned int vs,
+        const void* v_pt, const void *c_pt, const void *t_pt) :
+    mode(GLW_QUADS),
+    vert_size(vs),
+    size(sz),
+    count(ct),
+    vert_pointer(v_pt),
+    colour_pointer(c_pt),
+    texture_pointer(t_pt),
+    pretranslate(NULL),
+    prescale(NULL)
+{
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// GLState
+
+// Note: these defaults should match the OpenGL defaults
+GLState::GLState() :
+    array_vertex(false),
+    array_texcoord(false),
+    array_colour(false),
+    blend(false),
+    texture(false),
+    depthtest(false),
+    alphatest(false),
+    alpharef(0)
+{
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// GLStateManager
+
+GLStateManager *glmanager = NULL;
+
+void GLStateManager::init()
+{
+    if (glmanager)
+        return;
+
+#ifdef USE_GL
+    glmanager = (GLStateManager *) new OGLStateManager();
+#endif
+}
+
+void GLStateManager::shutdown()
+{
+    if (!glmanager)
+        return;
+
+    delete glmanager;
+}
+
+#ifdef DEBUG
+bool GLStateManager::_valid(int num_verts, drawing_modes mode)
+{
+    switch( mode )
+    {
+    case GLW_QUADS:
+    case GLW_TRIANGLE_STRIP:
+        return (num_verts % 4 == 0);
+    case GLW_TRIANGLES:
+        return (num_verts % 3 == 0);
+    case GLW_LINES:
+        return (num_verts % 2 == 0);
+    case GLW_POINTS:
+        return (true);
+    default:
+        return (false);
+    }
+}
+#endif // DEBUG
+
+#endif // USE_TILE