Add new PPB_OPENGLES2_DRAWBUFFERS_DEV_INTERFACE_1_0 pepper interface.

This allows applications to draw to multiple render targets at the same time.

BUG=318019

Review URL: https://codereview.chromium.org/182213003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255222 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 20 insertions, 0 deletions

diff --git a/ppapi/lib/gl/gles2/gl2ext_ppapi.c b/ppapi/lib/gl/gles2/gl2ext_ppapi.c
index a310114..e5872b5 100644
--- a/ppapi/lib/gl/gles2/gl2ext_ppapi.c
+++ b/ppapi/lib/gl/gles2/gl2ext_ppapi.c
@@ -38,6 +38,8 @@ static const struct PPB_OpenGLES2ChromiumMapSub*
     g_gles2_chromium_map_sub_interface = NULL;
 static const struct PPB_OpenGLES2Query*
     g_gles2_query_interface = NULL;
+static const struct PPB_OpenGLES2DrawBuffers_Dev*
+    g_gles2_draw_buffers_interface = NULL;
 
 // TODO(alokp): Make sure PP_TLS works on all supported platforms.
 static PP_TLS PP_Resource g_current_context = 0;
@@ -73,6 +75,10 @@ GLboolean GL_APIENTRY glInitializePPAPI(
     g_gles2_query_interface =
         get_browser_interface(PPB_OPENGLES2_QUERY_INTERFACE);
   }
+  if (!g_gles2_draw_buffers_interface) {
+    g_gles2_draw_buffers_interface =
+        get_browser_interface(PPB_OPENGLES2_DRAWBUFFERS_DEV_INTERFACE);
+  }
   return g_gles2_interface ? GL_TRUE : GL_FALSE;
 }
 
@@ -122,3 +128,8 @@ const struct PPB_OpenGLES2Query* GL_APIENTRY
     glGetQueryInterfacePPAPI(void) {
   return g_gles2_query_interface;
 }
+
+const struct PPB_OpenGLES2DrawBuffers_Dev* GL_APIENTRY
+    glGetDrawBuffersInterfacePPAPI(void) {
+  return g_gles2_draw_buffers_interface;
+}
diff --git a/ppapi/lib/gl/gles2/gl2ext_ppapi.h b/ppapi/lib/gl/gles2/gl2ext_ppapi.h
index 146d914..ff593c2 100644
--- a/ppapi/lib/gl/gles2/gl2ext_ppapi.h
+++ b/ppapi/lib/gl/gles2/gl2ext_ppapi.h
@@ -49,6 +49,8 @@ GL_APICALL const struct PPB_OpenGLES2ChromiumMapSub* GL_APIENTRY
     glGetChromiumMapSubInterfacePPAPI(void);
 GL_APICALL const struct PPB_OpenGLES2Query* GL_APIENTRY
     glGetQueryInterfacePPAPI(void);
+GL_APICALL const struct PPB_OpenGLES2DrawBuffers_Dev* GL_APIENTRY
+    glGetDrawBuffersInterfacePPAPI(void);
 
 #ifdef __cplusplus
 }
diff --git a/ppapi/lib/gl/gles2/gles2.c b/ppapi/lib/gl/gles2/gles2.c
index dabb20c..3e9732d 100644
--- a/ppapi/lib/gl/gles2/gles2.c
+++ b/ppapi/lib/gl/gles2/gles2.c
@@ -1055,3 +1055,10 @@ void GL_APIENTRY glVertexAttribDivisorANGLE(GLuint index, GLuint divisor) {
   if (ext)
     ext->VertexAttribDivisorANGLE(glGetCurrentContextPPAPI(), index, divisor);
 }
+void GL_APIENTRY glDrawBuffersEXT(GLsizei count, const GLenum* bufs) {
+  const struct PPB_OpenGLES2DrawBuffers_Dev* ext =
+      glGetDrawBuffersInterfacePPAPI();
+  if (ext)
+    ext->DrawBuffersEXT(glGetCurrentContextPPAPI(), count, bufs);
+}
+