mesa: enable EXT_render_snorm extension

Patch sets additional formats renderable and enables the extension
when OpenGL ES 3.1 is supported.

v2: instead of dummy_true, have a separate toggle for extension
    (Eric Anholt)

v3: add missing checks, simplify some existing checks and fix
    glCopyTexImage2D check (Nanley Chery)

    add SHORT and BYTE support in read_pixels_es3_error_check

Signed-off-by: Tapani Pälli <[email protected]>
Reviewed-by: Nanley Chery <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index 667020c193c..bbeb6034dd7 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -3794,6 +3794,15 @@ _mesa_is_es3_color_renderable(const struct gl_context *ctx,
    case GL_RG16:
    case GL_RGBA16:
       return _mesa_has_EXT_texture_norm16(ctx);
+   case GL_R8_SNORM:
+   case GL_RG8_SNORM:
+   case GL_RGBA8_SNORM:
+      return _mesa_has_EXT_render_snorm(ctx);
+   case GL_R16_SNORM:
+   case GL_RG16_SNORM:
+   case GL_RGBA16_SNORM:
+      return _mesa_has_EXT_texture_norm16(ctx) &&
+             _mesa_has_EXT_render_snorm(ctx);
    default:
       return false;
    }