mesa: Add queries for GL_SHADER_STORAGE_BUFFER

These handle querying the buffer name attached to a giving binding point
as well as the start offset and size of that buffer.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index e643d3a5e3624d8882fbb5b08e485e07deba4a31..2390850a0afa84577d7e3704d4ed27150bbe078c 100644 (file)
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1001,6 +1001,10 @@ find_custom_value(struct gl_context *ctx, const struct value_desc *d, union valu
    case GL_UNIFORM_BUFFER_BINDING:
       v->value_int = ctx->UniformBuffer->Name;
       break;
+   /* GL_ARB_shader_storage_buffer_object */
+   case GL_SHADER_STORAGE_BUFFER_BINDING:
+      v->value_int = ctx->ShaderStorageBuffer->Name;
+      break;
    /* GL_ARB_timer_query */
    case GL_TIMESTAMP:
       if (ctx->Driver.GetTimestamp) {
@@ -1939,6 +1943,33 @@ find_value_indexed(const char *func, GLenum pname, GLuint index, union value *v)
       v->value_int = ctx->UniformBufferBindings[index].Size;
       return TYPE_INT;
 
+   /* ARB_shader_storage_buffer_object */
+   case GL_SHADER_STORAGE_BUFFER_BINDING:
+      if (!ctx->Extensions.ARB_shader_storage_buffer_object)
+         goto invalid_enum;
+      if (index >= ctx->Const.MaxShaderStorageBufferBindings)
+         goto invalid_value;
+      v->value_int = ctx->ShaderStorageBufferBindings[index].BufferObject->Name;
+      return TYPE_INT;
+
+   case GL_SHADER_STORAGE_BUFFER_START:
+      if (!ctx->Extensions.ARB_shader_storage_buffer_object)
+         goto invalid_enum;
+      if (index >= ctx->Const.MaxShaderStorageBufferBindings)
+         goto invalid_value;
+      v->value_int = ctx->ShaderStorageBufferBindings[index].Offset < 0 ? 0 :
+                     ctx->ShaderStorageBufferBindings[index].Offset;
+      return TYPE_INT;
+
+   case GL_SHADER_STORAGE_BUFFER_SIZE:
+      if (!ctx->Extensions.ARB_shader_storage_buffer_object)
+         goto invalid_enum;
+      if (index >= ctx->Const.MaxShaderStorageBufferBindings)
+         goto invalid_value;
+      v->value_int = ctx->ShaderStorageBufferBindings[index].Size < 0 ? 0 :
+                     ctx->ShaderStorageBufferBindings[index].Size;
+      return TYPE_INT;
+
    /* ARB_texture_multisample / GL3.2 */
    case GL_SAMPLE_MASK_VALUE:
       if (index != 0)