[Mesa-dev] [PATCH] mesa/st: add support for 2101010 vertex format conversion.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/mesa/state_tracker/st_draw.c       |   35 +++++++++++++++++++++++++++++++-
 src/mesa/state_tracker/st_extensions.c |   27 ++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 1 deletions(-)

diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index 5040c6f..39a947d 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -187,11 +187,44 @@ st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
                       GLboolean normalized)
 {
    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
-          type == GL_FIXED || type == GL_HALF_FLOAT);
+          type == GL_FIXED || type == GL_HALF_FLOAT ||
+          type == GL_INT_2_10_10_10_REV ||
+          type == GL_UNSIGNED_INT_2_10_10_10_REV);
    assert(size >= 1);
    assert(size <= 4);
    assert(format == GL_RGBA || format == GL_BGRA);
 
+   if (type == GL_INT_2_10_10_10_REV ||
+       type == GL_UNSIGNED_INT_2_10_10_10_REV) {
+      assert(size == 4);
+
+      if (format == GL_BGRA) {
+         if (type == GL_INT_2_10_10_10_REV) {
+            if (normalized)
+               return PIPE_FORMAT_B10G10R10A2_SNORM;
+            else
+               return PIPE_FORMAT_B10G10R10A2_SSCALED;
+         } else {
+            if (normalized)
+               return PIPE_FORMAT_B10G10R10A2_UNORM;
+            else
+               return PIPE_FORMAT_B10G10R10A2_USCALED;
+         }
+      } else {
+         if (type == GL_INT_2_10_10_10_REV) {
+            if (normalized)
+               return PIPE_FORMAT_R10G10B10A2_SNORM;
+            else
+               return PIPE_FORMAT_R10G10B10A2_SSCALED;
+         } else {
+            if (normalized)
+               return PIPE_FORMAT_R10G10B10A2_UNORM;
+            else
+               return PIPE_FORMAT_R10G10B10A2_USCALED;
+         }
+      }
+   }
+
    if (format == GL_BGRA) {
       /* this is an odd-ball case */
       assert(type == GL_UNSIGNED_BYTE);
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index aa7f3b5..88c6050 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -534,6 +534,33 @@ void st_init_extensions(struct st_context *st)
       ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
    }
 
+   if (screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_UNORM,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_UNORM,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_SNORM,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_SNORM,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_USCALED,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_USCALED,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_R10G10B10A2_SSCALED,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER) &&
+       screen->is_format_supported(screen, PIPE_FORMAT_B10G10R10A2_SSCALED,
+                                   PIPE_BUFFER, 0,
+                                   PIPE_BIND_VERTEX_BUFFER)) {
+      ctx->Extensions.ARB_vertex_type_2_10_10_10_rev = GL_TRUE;
+   }
+
    if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
       ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
-- 
1.7.6