nir: remove gl.h include from nir headers.

This saves a lot of pointless gl.h includes across the board,
it moves the one place that needs GLenum into a separate file
only used in those passes that require it.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14605>

src/broadcom/compiler/v3d_compiler.h

@@ -1125,7 +1125,7 @@ bool vir_init_reg_sets(struct v3d_compiler *compiler);
 
 int v3d_shaderdb_dump(struct v3d_compile *c, char **shaderdb_str);
 
-bool v3d_gl_format_is_return_32(GLenum format);
+bool v3d_gl_format_is_return_32(enum pipe_format format);
 
 uint32_t
 v3d_get_op_for_atomic_add(nir_intrinsic_instr *instr, unsigned src);

src/compiler/glsl/gl_nir_link_atomics.c

@@ -22,6 +22,7 @@
  */
 
 #include "nir.h"
+#include "GL/gl.h"
 #include "linker_util.h"
 #include "gl_nir_linker.h"
 #include "compiler/glsl/ir_uniform.h" /* for gl_uniform_storage */

src/compiler/glsl/gl_nir_link_uniforms.c

@@ -22,6 +22,7 @@
  */
 
 #include "nir.h"
+#include "nir_gl_types.h"
 #include "nir_deref.h"
 #include "gl_nir_linker.h"
 #include "compiler/glsl/ir_uniform.h" /* for gl_uniform_storage */

src/compiler/glsl/gl_nir_link_xfb.c

@@ -22,6 +22,7 @@
  */
 
 #include "nir.h"
+#include "nir_gl_types.h"
 #include "nir_xfb_info.h"
 #include "gl_nir_linker.h"
 #include "linker_util.h"

src/compiler/glsl/gl_nir_linker.c

@@ -22,6 +22,7 @@
  */
 
 #include "nir.h"
+#include "GL/gl.h"
 #include "gl_nir.h"
 #include "gl_nir_linker.h"
 #include "linker_util.h"

src/compiler/nir/nir.h

@@ -30,7 +30,6 @@
 
 #include "util/hash_table.h"
 #include "compiler/glsl/list.h"
-#include "GL/gl.h" /* GLenum */
 #include "util/list.h"
 #include "util/log.h"
 #include "util/ralloc.h"

src/compiler/nir_gl_types.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2017 Igalia
+ *
+ * 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ *    Neil Roberts.
+ *
+ */
+
+#ifndef NIR_GL_TYPES_H
+#define NIR_GL_TYPES_H
+
+#include "GL/gl.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+GLenum glsl_get_gl_type(const struct glsl_type *type);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/compiler/nir_types.cpp

@@ -26,6 +26,7 @@
  */
 
 #include "nir_types.h"
+#include "nir_gl_types.h"
 #include "compiler/glsl/ir.h"
 
 const char *

src/compiler/nir_types.h

@@ -84,8 +84,6 @@ glsl_texture_type_to_sampler(const struct glsl_type *type, bool is_shadow);
 const struct glsl_type *
 glsl_sampler_type_to_texture(const struct glsl_type *type);
 
-GLenum glsl_get_gl_type(const struct glsl_type *type);
-
 enum glsl_base_type glsl_get_base_type(const struct glsl_type *type);
 
 unsigned glsl_get_vector_elements(const struct glsl_type *type);

src/mesa/main/glspirv.h

@@ -25,6 +25,7 @@
 #define GLSPIRV_H
 
 #include "compiler/nir/nir.h"
+#include "main/glheader.h"
 
 #ifdef __cplusplus
 extern "C" {