[Mesa-dev] [PATCH 3/5] st/mesa: advertise ARB_ES3_compatibility if GLSL 3.30 and ETC2 are supported

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

---
 docs/GL3.txt                           |  2 +-
 docs/relnotes/10.3.html                |  1 +
 src/mesa/state_tracker/st_extensions.c | 28 ++++++++++++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/docs/GL3.txt b/docs/GL3.txt
index e241257..334ee63 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -155,7 +155,7 @@ GL 4.3:
 
   GLSL 4.3                                             not started
   GL_ARB_arrays_of_arrays                              started (Timothy)
-  GL_ARB_ES3_compatibility                             DONE (i965)
+  GL_ARB_ES3_compatibility                             DONE (all drivers that support GLSL 3.30)
   GL_ARB_clear_buffer_object                           DONE (all drivers)
   GL_ARB_compute_shader                                started (currently stalled)
   GL_ARB_copy_image                                    not started
diff --git a/docs/relnotes/10.3.html b/docs/relnotes/10.3.html
index f023ca6..c0828da 100644
--- a/docs/relnotes/10.3.html
+++ b/docs/relnotes/10.3.html
@@ -44,6 +44,7 @@ Note: some of the new features are only available with certain drivers.
 </p>
 
 <ul>
+<li>GL_ARB_ES3_compatibility on nv50, nvc0, r600, radeonsi, softpipe, llvmpipe</li>
 <li>GL_ARB_compressed_texture_pixel_storage on all drivers</li>
 <li>GL_ARB_draw_indirect on nvc0, radeonsi</li>
 <li>GL_ARB_explicit_uniform_location (all drivers that support GLSL)</li>
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 7ac4840..3974adb 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -826,4 +826,32 @@ void st_init_extensions(struct st_context *st)
    }
    if (ctx->Const.MaxProgramTextureGatherComponents > 0)
       ctx->Extensions.ARB_texture_gather = GL_TRUE;
+
+   /* GL_ARB_ES3_compatibility.
+    *
+    * Assume that ES3 is supported if GLSL 3.30 is supported.
+    * (OpenGL 3.3 is a requirement for that extension.)
+    */
+   if (ctx->Const.GLSLVersion >= 330 &&
+       /* Requirements for ETC2 emulation. */
+       screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
+                                   PIPE_TEXTURE_2D, 0,
+                                   PIPE_BIND_SAMPLER_VIEW)) {
+      ctx->Extensions.ARB_ES3_compatibility = GL_TRUE;
+   }
 }
-- 
1.9.1