Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/render/RE_texture.h

@@ -0,0 +1,107 @@
+/* SPDX-FileCopyrightText: 2006 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+/** \file
+ * \ingroup render
+ *
+ * This include is for non-render pipeline exports (still old cruft here).
+ */
+
+#pragma once
+
+#include "BLI_compiler_attrs.h"
+
+/* called by meshtools */
+
+namespace blender {
+
+struct Depsgraph;
+struct ImagePool;
+struct MTex;
+struct Tex;
+
+/* `texture_procedural.cc` */
+
+/**
+ * \param pool: Thread pool, may be NULL.
+ *
+ * \return True if the texture has color, otherwise false.
+ */
+bool RE_texture_evaluate(const struct MTex *mtex,
+                         const float vec[3],
+                         int thread,
+                         struct ImagePool *pool,
+                         bool skip_load_image,
+                         bool texnode_preview,
+                         /* Return arguments. */
+                         float *r_intensity,
+                         float r_rgba[4]) ATTR_NONNULL(1, 2, 7, 8);
+
+/**
+ * \param tex: Texture.
+ * \param out: Previous color.
+ * \param fact: Texture strength.
+ * \param facg: Button strength value.
+ */
+float texture_value_blend(float tex, float out, float fact, float facg, int blendtype);
+
+void RE_texture_rng_init();
+void RE_texture_rng_exit();
+
+/* `texture_procedural.cc` */
+
+/**
+ * Texture evaluation result.
+ */
+struct TexResult {
+  float tin;
+  float trgba[4];
+  /* Is actually a boolean: When true -> use alpha, false -> set alpha to 1.0. */
+  int talpha;
+};
+
+/* This one uses nodes. */
+
+/**
+ * WARNING(@ideasman42): if the texres's values are not declared zero,
+ * check the return value to be sure the color values are set before using the r/g/b values,
+ * otherwise you may use uninitialized values.
+ *
+ * Use it for stuff which is out of render pipeline.
+ */
+int multitex_ext(struct Tex *tex,
+                 const float texvec[3],
+                 struct TexResult *texres,
+                 short thread,
+                 struct ImagePool *pool,
+                 bool scene_color_manage,
+                 bool skip_load_image);
+
+/**
+ * Nodes disabled.
+ * extern-tex doesn't support nodes (#ntreeBeginExec() can't be called when rendering is going on).
+ *
+ * Use it for stuff which is out of render pipeline.
+ */
+int multitex_ext_safe(struct Tex *tex,
+                      const float texvec[3],
+                      struct TexResult *texres,
+                      struct ImagePool *pool,
+                      bool scene_color_manage,
+                      bool skip_load_image);
+
+/**
+ * Only for internal node usage.
+ *
+ * this is called from the shader and texture nodes
+ * Use it from render pipeline only!
+ */
+int multitex_nodes(struct Tex *tex,
+                   const float texvec[3],
+                   struct TexResult *texres,
+                   short thread,
+                   short which_output,
+                   const struct MTex *mtex,
+                   struct ImagePool *pool);
+
+}  // namespace blender