From 549b1466fc867193c0ddf6569bb3f5f81dd7ab98 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Wed, 20 Mar 2013 11:00:14 +0100
Subject: [PATCH] Support for ES2 extension ANGLE_depth_texture.

---
 src/AbstractImage.h   |  2 ++
 src/AbstractTexture.h | 18 +++++++++++-------
 src/Context.cpp       |  1 +
 src/Extensions.h      |  1 +
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/AbstractImage.h b/src/AbstractImage.h
index 17f9cacb8..ff6964bc9 100644
--- a/src/AbstractImage.h
+++ b/src/AbstractImage.h
@@ -223,6 +223,8 @@ class MAGNUM_EXPORT AbstractImage {
 
             /**
              * Depth component.
+             * @requires_gles30 For texture data only, extension
+             *      @es_extension{ANGLE,depth_texture}.
              * @requires_es_extension For framebuffer reading only, extension
              *      @es_extension2{NV,read_depth,GL_NV_read_depth_stencil}.
              */
diff --git a/src/AbstractTexture.h b/src/AbstractTexture.h
index 54a58b2ec..c20a4fc99 100644
--- a/src/AbstractTexture.h
+++ b/src/AbstractTexture.h
@@ -893,7 +893,8 @@ class MAGNUM_EXPORT AbstractTexture {
              * Depth component, size implementation-dependent.
              * @deprecated Prefer to use exactly specified version of this
              *      format, e.g. @ref Magnum::AbstractTexture::InternalFormat "InternalFormat::DepthComponent16".
-             * @requires_gles30 %Extension @es_extension{OES,depth_texture}
+             * @requires_gles30 %Extension @es_extension{OES,depth_texture} or
+             *      @es_extension{ANGLE,depth_texture}
              */
             DepthComponent = GL_DEPTH_COMPONENT,
 
@@ -911,8 +912,9 @@ class MAGNUM_EXPORT AbstractTexture {
 
             /**
              * Depth component, 16bit.
-             * @requires_gles30 %Extension @es_extension{OES,required_internalformat}
-             *      and @es_extension{OES,depth_texture}
+             * @requires_gles30 %Extension (@es_extension{OES,required_internalformat}
+             *      and @es_extension{OES,depth_texture}) or (@es_extension{EXT,texture_storage}
+             *      and @es_extension{ANGLE,depth_texture})
              */
             DepthComponent16 = GL_DEPTH_COMPONENT16,
 
@@ -929,8 +931,9 @@ class MAGNUM_EXPORT AbstractTexture {
 
             /**
              * Depth component, 32bit.
-             * @requires_es_extension %Extension @es_extension{OES,required_internalformat},
-             *      @es_extension{OES,depth_texture} and @es_extension{OES,depth32}
+             * @requires_es_extension %Extension (@es_extension{OES,required_internalformat},
+             *      @es_extension{OES,depth_texture} and @es_extension{OES,depth32})
+             *      or (@es_extension{EXT,texture_storage} and @es_extension{ANGLE,depth_texture})
              */
             #ifndef MAGNUM_TARGET_GLES2
             DepthComponent32 = GL_DEPTH_COMPONENT32,
@@ -951,8 +954,9 @@ class MAGNUM_EXPORT AbstractTexture {
             /**
              * 24bit depth and 8bit stencil component.
              * @requires_gl30 %Extension @extension{EXT,packed_depth_stencil}
-             * @requires_gles30 %Extension @es_extension{OES,required_internalformat}
-             *      and @es_extension{OES,packed_depth_stencil}
+             * @requires_gles30 %Extension @es_extension{OES,packed_depth_stencil}
+             *      and (@es_extension{OES,required_internalformat} or
+             *      (@es_extension{EXT,texture_storage} and @es_extension{ANGLE,depth_texture}))
              */
             #ifdef MAGNUM_TARGET_GLES2
             Depth24Stencil8 = GL_DEPTH24_STENCIL8_OES
diff --git a/src/Context.cpp b/src/Context.cpp
index 9d511f0e1..62201b919 100644
--- a/src/Context.cpp
+++ b/src/Context.cpp
@@ -219,6 +219,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,OES,texture_3D)};
     static const std::vector<Extension> extensionsES300{
         _extension(GL,ANGLE,framebuffer_blit),
+        _extension(GL,ANGLE,depth_texture),                 // done
         _extension(GL,APPLE,framebuffer_multisample),
         _extension(GL,ARM,rgba8),
         _extension(GL,EXT,texture_type_2_10_10_10_REV),
diff --git a/src/Extensions.h b/src/Extensions.h
index 476f18101..1f3480957 100644
--- a/src/Extensions.h
+++ b/src/Extensions.h
@@ -183,6 +183,7 @@ namespace GL {
     #line 1
     namespace ANGLE {
         _extension(GL,ANGLE,framebuffer_blit,       GLES200, GLES300) // #83
+        _extension(GL,ANGLE,depth_texture,          GLES200, GLES300) // #138
     } namespace APPLE {
         _extension(GL,APPLE,framebuffer_multisample, GLES200, GLES300) // #78
         _extension(GL,APPLE,texture_format_BGRA8888, GLES200,   None) // #79