Atharva Nimbalkar : vkd3d-shader/glsl: Implement VKD3DSIH_RET.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: d71483d0e52d7a1acb6a2e200013543d170fca07
URL:    https://source.winehq.org/git/vkd3d.git/?a=commit;h=d71483d0e52d7a1acb6a2e200013543d170fca07

Author: Atharva Nimbalkar <atharvakn at gmail.com>
Date:   Thu Aug 19 20:36:16 2021 +0530

vkd3d-shader/glsl: Implement VKD3DSIH_RET.

Signed-off-by: Atharva Nimbalkar <atharvakn at gmail.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 libs/vkd3d-shader/glsl.c                 | 23 ++++++++++++++++++++++-
 libs/vkd3d-shader/vkd3d_shader_main.c    |  2 +-
 libs/vkd3d-shader/vkd3d_shader_private.h |  3 ++-
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/libs/vkd3d-shader/glsl.c b/libs/vkd3d-shader/glsl.c
index ac132e8..d339fbd 100644
--- a/libs/vkd3d-shader/glsl.c
+++ b/libs/vkd3d-shader/glsl.c
@@ -20,13 +20,15 @@
 
 struct vkd3d_glsl_generator
 {
+    struct vkd3d_shader_version version;
     struct vkd3d_string_buffer buffer;
     struct vkd3d_shader_location location;
     struct vkd3d_shader_message_context *message_context;
     bool failed;
 };
 
-struct vkd3d_glsl_generator *vkd3d_glsl_generator_create(const struct vkd3d_shader_compile_info *compile_info,
+struct vkd3d_glsl_generator *vkd3d_glsl_generator_create(const struct vkd3d_shader_version *version,
+        const struct vkd3d_shader_compile_info *compile_info,
         struct vkd3d_shader_message_context *message_context)
 {
     struct vkd3d_glsl_generator *generator;
@@ -35,6 +37,7 @@ struct vkd3d_glsl_generator *vkd3d_glsl_generator_create(const struct vkd3d_shad
         return NULL;
 
     memset(generator, 0, sizeof(*generator));
+    generator->version = *version;
     generator->location.source_name = compile_info->source_name;
     generator->location.line = 2; /* Line 1 is the version token. */
     generator->message_context = message_context;
@@ -54,6 +57,21 @@ static void VKD3D_PRINTF_FUNC(3, 4) vkd3d_glsl_compiler_error(
     return;
 }
 
+static void shader_glsl_ret(struct vkd3d_glsl_generator *generator,
+        const struct vkd3d_shader_instruction *ins)
+{
+    const struct vkd3d_shader_version *version = &generator->version;
+
+    /*
+    * TODO: Implement in_subroutine
+    * TODO: shader_glsl_generate_shader_epilogue(generator);
+    */
+    if (version->major >= 4)
+    {
+        vkd3d_string_buffer_printf(&generator->buffer, "return;\n");
+    }
+}
+
 static void vkd3d_glsl_handle_instruction(struct vkd3d_glsl_generator *generator,
         const struct vkd3d_shader_instruction *instruction)
 {
@@ -62,6 +80,9 @@ static void vkd3d_glsl_handle_instruction(struct vkd3d_glsl_generator *generator
         case VKD3DSIH_DCL_INPUT:
         case VKD3DSIH_DCL_OUTPUT_SIV:
             break;
+        case VKD3DSIH_RET:
+            shader_glsl_ret(generator, instruction);
+            break;
         default:
             vkd3d_glsl_compiler_error(generator,
                     VKD3D_SHADER_ERROR_GLSL_INTERNAL,
diff --git a/libs/vkd3d-shader/vkd3d_shader_main.c b/libs/vkd3d-shader/vkd3d_shader_main.c
index d2182e1..16994d2 100644
--- a/libs/vkd3d-shader/vkd3d_shader_main.c
+++ b/libs/vkd3d-shader/vkd3d_shader_main.c
@@ -1036,7 +1036,7 @@ static int compile_dxbc_tpf(const struct vkd3d_shader_compile_info *compile_info
     {
         struct vkd3d_glsl_generator *glsl_generator;
 
-        if (!(glsl_generator = vkd3d_glsl_generator_create(compile_info, message_context)))
+        if (!(glsl_generator = vkd3d_glsl_generator_create(&parser.shader_version, compile_info, message_context)))
         {
             ERR("Failed to create GLSL generator.\n");
             vkd3d_shader_parser_destroy(&parser);
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index cf2083a..54ac532 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -986,7 +986,8 @@ int shader_parse_input_signature(const void *dxbc, size_t dxbc_length,
 
 struct vkd3d_glsl_generator;
 
-struct vkd3d_glsl_generator *vkd3d_glsl_generator_create(const struct vkd3d_shader_compile_info *compile_info,
+struct vkd3d_glsl_generator *vkd3d_glsl_generator_create(const struct vkd3d_shader_version *version,
+        const struct vkd3d_shader_compile_info *compile_info,
         struct vkd3d_shader_message_context *message_context);
 int vkd3d_glsl_generator_generate(void *parser_data, const uint32_t *parser_ptr,
         struct vkd3d_glsl_generator *generator,