mesa: Add new MESA_FORMATs for ETC2 compressed textures

It is required by OpenGL ES 3.0 to support ETC2 textures.
This patch adds new MESA_FORMATs for following etc2 texture
formats:
 GL_COMPRESSED_RGB8_ETC2
 GL_COMPRESSED_SRGB8_ETC2
 GL_COMPRESSED_RGBA8_ETC2_EAC
 GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
 GL_COMPRESSED_R11_EAC
 GL_COMPRESSED_RG11_EAC
 GL_COMPRESSED_SIGNED_R11_EAC
 GL_COMPRESSED_SIGNED_RG11_EAC
 MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1
 MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1

Above formats are currently available in only gles 3.0.

v2: Add entries in texfetch_funcs[] array.

Signed-off-by: Anuj Phogat <[email protected]>
Reviewed-by: Brian Paul <[email protected]>

v3 (Paul Berry <[email protected]>): comment out symbols that
are not implemented yet, so that this commit compiles on its own;
future commits will uncomment the symbols as they become available.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_texfetch.c b/src/mesa/swrast/s_texfetch.c
index 7bfe3b941a3..8f0f9b754ef 100644
--- a/src/mesa/swrast/s_texfetch.c
+++ b/src/mesa/swrast/s_texfetch.c
@@ -1029,6 +1029,66 @@ texfetch_funcs[] =
       NULL
    },
    {
+      MESA_FORMAT_ETC2_RGB8,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_rgb8 -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_srgb8 -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_RGBA8_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_rgba8_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_srgb8_alpha8_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_R11_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_r11_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_RG11_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_rg11_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_SIGNED_R11_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_signed_r11_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1 -- not implemented yet */,
+      NULL
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
+      NULL,
+      NULL /* _mesa_fetch_texel_2d_f_etc2_srgb8_punchthrough_alpha1 -- not implemented yet */,
+      NULL
+   },
+   {
       MESA_FORMAT_SIGNED_A8,
       fetch_texel_1d_signed_a8,
       fetch_texel_2d_signed_a8,