[Mesa-dev] [v3 4/8] mesa: ARB_texture_view get parameters

[Courtney Goeltzenleuchter]

Add support for ARB_texture_view get parameters:
GL_TEXTURE_VIEW_MIN_LEVEL
GL_TEXTURE_VIEW_NUM_LEVELS
GL_TEXTURE_VIEW_MIN_LAYER
GL_TEXTURE_VIEW_NUM_LAYERS

Incorporate feedback regarding when to allow query of
GL_TEXTURE_IMMUTABLE_LEVELS.

Signed-off-by: Courtney Goeltzenleuchter <courtney at LunarG.com>
---
 src/mesa/main/texparam.c | 60 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 56 insertions(+), 4 deletions(-)

diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index d56b7d9..b3e2d0a 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -1565,9 +1565,35 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
          break;
 
       case GL_TEXTURE_IMMUTABLE_LEVELS:
-         if (!_mesa_is_gles3(ctx))
+         if (_mesa_is_gles3(ctx) ||
+             (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_view))
+            *params = (GLfloat) obj->ImmutableLevels;
+         else
+            goto invalid_pname;
+         break;
+
+      case GL_TEXTURE_VIEW_MIN_LEVEL:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLfloat) obj->MinLevel;
+         break;
+
+      case GL_TEXTURE_VIEW_NUM_LEVELS:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLfloat) obj->NumLevels;
+         break;
+
+      case GL_TEXTURE_VIEW_MIN_LAYER:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLfloat) obj->MinLayer;
+         break;
+
+      case GL_TEXTURE_VIEW_NUM_LAYERS:
+         if (!ctx->Extensions.ARB_texture_view)
             goto invalid_pname;
-         *params = (GLfloat) obj->ImmutableLevels;
+         *params = (GLfloat) obj->NumLayers;
          break;
 
       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
@@ -1746,9 +1772,35 @@ _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
          break;
 
       case GL_TEXTURE_IMMUTABLE_LEVELS:
-         if (!_mesa_is_gles3(ctx))
+         if (_mesa_is_gles3(ctx) ||
+             (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_view))
+            *params = obj->ImmutableLevels;
+         else
+            goto invalid_pname;
+         break;
+
+      case GL_TEXTURE_VIEW_MIN_LEVEL:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLint) obj->MinLevel;
+         break;
+
+      case GL_TEXTURE_VIEW_NUM_LEVELS:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLint) obj->NumLevels;
+         break;
+
+      case GL_TEXTURE_VIEW_MIN_LAYER:
+         if (!ctx->Extensions.ARB_texture_view)
+            goto invalid_pname;
+         *params = (GLint) obj->MinLayer;
+         break;
+
+      case GL_TEXTURE_VIEW_NUM_LAYERS:
+         if (!ctx->Extensions.ARB_texture_view)
             goto invalid_pname;
-         *params = obj->ImmutableLevels;
+         *params = (GLint) obj->NumLayers;
          break;
 
       case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
-- 
1.8.1.2