Add support for more depth buffer formats in our EGLConfigs.

This includes no depth buffer and 16-bit depth buffer with no stencil buffer.

TRAC #22496

Signed-off-by: Geoff Lang
Signed-off-by: Shannon Woods
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1851 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/renderer11_utils.cpp b/src/libGLESv2/renderer/renderer11_utils.cpp
index 2247e50..98a1b48 100644
--- a/src/libGLESv2/renderer/renderer11_utils.cpp
+++ b/src/libGLESv2/renderer/renderer11_utils.cpp
@@ -229,6 +229,8 @@
 {
     switch (format)
     {
+      case DXGI_FORMAT_UNKNOWN: return GL_NONE;
+      case DXGI_FORMAT_D16_UNORM: return GL_DEPTH_COMPONENT16;
       case DXGI_FORMAT_D24_UNORM_S8_UINT: return GL_DEPTH24_STENCIL8_OES;
       default:
         UNREACHABLE();
@@ -245,6 +247,8 @@
         return GL_BGRA8_EXT;
       case DXGI_FORMAT_R8G8B8A8_UNORM:
         return GL_RGBA8_OES;
+      case DXGI_FORMAT_D16_UNORM:
+        return GL_DEPTH_COMPONENT16;
       case DXGI_FORMAT_D24_UNORM_S8_UINT:
         return GL_DEPTH24_STENCIL8_OES;
       default:
@@ -284,6 +288,8 @@
         return GL_R16F_EXT;
       case DXGI_FORMAT_R16G16_FLOAT:
         return GL_RG16F_EXT;
+      case DXGI_FORMAT_D16_UNORM:
+        return GL_DEPTH_COMPONENT16;
       case DXGI_FORMAT_D24_UNORM_S8_UINT:
         return GL_DEPTH24_STENCIL8_OES;
       case DXGI_FORMAT_UNKNOWN:
@@ -313,6 +319,7 @@
       case GL_BGRA8_EXT:
         return DXGI_FORMAT_B8G8R8A8_UNORM;
       case GL_DEPTH_COMPONENT16:
+        return DXGI_FORMAT_D16_UNORM;
       case GL_STENCIL_INDEX8:
       case GL_DEPTH24_STENCIL8_OES:
         return DXGI_FORMAT_D24_UNORM_S8_UINT;
@@ -368,6 +375,7 @@
       case GL_RG16F_EXT:
         return DXGI_FORMAT_R16G16_FLOAT;
       case GL_DEPTH_COMPONENT16:
+        return DXGI_FORMAT_D16_UNORM;
       case GL_DEPTH_COMPONENT32_OES:
       case GL_DEPTH24_STENCIL8_OES:
         return DXGI_FORMAT_D24_UNORM_S8_UINT;
@@ -563,6 +571,18 @@
     }
 }
 
+bool IsDepthStencilFormat(DXGI_FORMAT format)
+{
+    switch (format)
+    {
+      case DXGI_FORMAT_D16_UNORM:
+      case DXGI_FORMAT_D24_UNORM_S8_UINT:
+        return true;
+      default:
+        return false;
+    }
+}
+
 HRESULT SetDebugName(ID3D11DeviceChild *resource, const char *name)
 {
 #if defined(_DEBUG)