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src/gallium/drivers/crocus/crocus_pipe.h

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+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef CROCUS_PIPE_H
+#define CROCUS_PIPE_H
+
+#include "pipe/p_defines.h"
+#include "compiler/shader_enums.h"
+
+static inline mesa_shader_stage
+stage_from_pipe(mesa_shader_stage pstage)
+{
+   return (mesa_shader_stage)pstage;
+}
+
+static inline mesa_shader_stage
+stage_to_pipe(mesa_shader_stage stage)
+{
+   return (mesa_shader_stage)stage;
+}
+
+/**
+ * Convert an swizzle enumeration (i.e. PIPE_SWIZZLE_X) to one of the HW's
+ * "Shader Channel Select" enumerations (i.e. SCS_RED).  The mappings are
+ *
+ * SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W, SWIZZLE_ZERO, SWIZZLE_ONE
+ *         0          1          2          3             4            5
+ *         4          5          6          7             0            1
+ *   SCS_RED, SCS_GREEN,  SCS_BLUE, SCS_ALPHA,     SCS_ZERO,     SCS_ONE
+ *
+ * which is simply adding 4 then modding by 8 (or anding with 7).
+ */
+static inline enum isl_channel_select
+pipe_swizzle_to_isl_channel(enum pipe_swizzle swizzle)
+{
+   return (swizzle + 4) & 7;
+}
+
+#endif