Akihiro Sagawa : vkd3d-shader/hlsl: Add degrees() function.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: aed2d142cf345305bdf1b37679ce97a123f9b89f
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/aed2d142cf345305bdf1b37679ce97...

Author: Akihiro Sagawa 
Date:   Thu Nov 16 20:22:37 2023 +0900

vkd3d-shader/hlsl: Add degrees() function.

---

libs/vkd3d-shader/hlsl.y          | 17 +++++++++++++++++
 tests/hlsl/angle-unit.shader_test | 14 ++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index a9ff41aa..242e8307 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -2878,6 +2878,22 @@ static bool intrinsic_ddy_coarse(struct hlsl_ctx *ctx,
     return !!add_unary_arithmetic_expr(ctx, params->instrs, HLSL_OP1_DSY_COARSE, arg, loc);
 }

+static bool intrinsic_degrees(struct hlsl_ctx *ctx,
+        const struct parse_initializer *params, const struct vkd3d_shader_location *loc)
+{
+    struct hlsl_ir_node *arg, *deg;
+
+    if (!(arg = intrinsic_float_convert_arg(ctx, params, params->args[0], loc)))
+        return false;
+
+    /* 1 rad = 180/pi degree = 57.2957795 degree */
+    if (!(deg = hlsl_new_float_constant(ctx, 57.2957795f, loc)))
+        return false;
+    hlsl_block_add_instr(params->instrs, deg);
+
+    return !!add_binary_arithmetic_expr(ctx, params->instrs, HLSL_OP2_MUL, arg, deg, loc);
+}
+
 static bool intrinsic_ddy_fine(struct hlsl_ctx *ctx,
         const struct parse_initializer *params, const struct vkd3d_shader_location *loc)
 {
@@ -3865,6 +3881,7 @@ intrinsic_functions[] =
     {"ddy",                                 1, true,  intrinsic_ddy},
     {"ddy_coarse",                          1, true,  intrinsic_ddy_coarse},
     {"ddy_fine",                            1, true,  intrinsic_ddy_fine},
+    {"degrees",                             1, true,  intrinsic_degrees},
     {"distance",                            2, true,  intrinsic_distance},
     {"dot",                                 2, true,  intrinsic_dot},
     {"exp",                                 1, true,  intrinsic_exp},
diff --git a/tests/hlsl/angle-unit.shader_test b/tests/hlsl/angle-unit.shader_test
index 6e0538f9..407d2413 100644
--- a/tests/hlsl/angle-unit.shader_test
+++ b/tests/hlsl/angle-unit.shader_test
@@ -10,3 +10,17 @@ float4 main() : sv_target
 uniform 0 float4 0.0 30.0 150.0 180.0
 draw quad
 probe all rgba (0.0, 0.52359877, 2.61799387, 3.14159265)
+
+
+[pixel shader]
+uniform float4 a;
+
+float4 main() : sv_target
+{
+    return degrees(a);
+}
+
+[test]
+uniform 0 float4 0.0 0.78539816 1.57079632 2.35619449
+draw quad
+probe all rgba (0.0, 45.0, 90.0, 135.0)