mesa/shaderimage: Make is_image_format_supported public

It will be used by the ARB_internalformat_query2 implementation
to implement queries related to the ARB_shader_image_load_store
extension.

Reviewed-by: Dave Airlie <airlied@redhat.com>

src/mesa/main/shaderimage.c

@@ -331,12 +331,9 @@ get_image_format_class(mesa_format format)
    }
 }
 
-/**
- * Return whether an image format should be supported based on the current API
- * version of the context.
- */
-static bool
-is_image_format_supported(const struct gl_context *ctx, GLenum format)
+bool
+_mesa_is_shader_image_format_supported(const struct gl_context *ctx,
+                                       GLenum format)
 {
    switch (format) {
    /* Formats supported on both desktop and ES GL, c.f. table 8.27 of the
@@ -503,7 +500,7 @@ validate_bind_image_texture(struct gl_context *ctx, GLuint unit,
       return GL_FALSE;
    }
 
-   if (!is_image_format_supported(ctx, format)) {
+   if (!_mesa_is_shader_image_format_supported(ctx, format)) {
       _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(format)");
       return GL_FALSE;
    }
@@ -668,7 +665,7 @@ _mesa_BindImageTextures(GLuint first, GLsizei count, const GLuint *textures)
             tex_format = image->InternalFormat;
          }
 
-         if (!is_image_format_supported(ctx, tex_format)) {
+         if (!_mesa_is_shader_image_format_supported(ctx, tex_format)) {
             /* The ARB_multi_bind spec says:
              *
              *   "An INVALID_OPERATION error is generated if the internal

src/mesa/main/shaderimage.h

@@ -42,6 +42,14 @@ struct gl_context;
 mesa_format
 _mesa_get_shader_image_format(GLenum format);
 
+/**
+ * Return whether an image format should be supported based on the current API
+ * version of the context.
+ */
+bool
+_mesa_is_shader_image_format_supported(const struct gl_context *ctx,
+                                       GLenum format);
+
 /**
  * Get a single image unit struct with the default state.
  */