graphics/shaderc: Add more patch.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

2 files changed, 95 insertions, 4 deletions

diff --git a/graphics/shaderc/fix-glslang-build.patch b/graphics/shaderc/fix-glslang-build.patch
new file mode 100644
index 0000000000..bbea79b9a6
--- /dev/null
+++ b/graphics/shaderc/fix-glslang-build.patch
@@ -0,0 +1,89 @@
+From ccf948e975e0ddd08f07c5244f23f3158d65ed7b Mon Sep 17 00:00:00 2001
+From: David Neto <dneto@google.com>
+Date: Wed, 21 Aug 2019 15:56:13 -0400
+Subject: [PATCH] Force Glslang to support HLSL in its interface
+
+Fixes a compilation problem introduced by recent
+Glslang changes to optionally build into a very small
+GLSL-only binary.
+
+Also fix test cases to have set and binding layout qualifiers on
+buffers when compiling for Vulkan.  This rule is now enforced by
+Glslang.
+---
+ README.md                                | 8 ++++++++
+ glslc/test/option_dash_fhlsl_offsets.py  | 1 +
+ libshaderc/src/common_shaders_for_test.h | 1 +
+ libshaderc_util/CMakeLists.txt           | 3 +++
+ libshaderc_util/src/compiler_test.cc     | 1 +
+ 5 files changed, 14 insertions(+)
+
+diff --git a/README.md b/README.md
+index e2c33555..172c8e04 100644
+--- a/README.md
++++ b/README.md
+@@ -93,6 +93,14 @@ Shaderc into.
+ 
+ The rest of this section describes how to build Shaderc from sources.
+ 
++Note: Shaderc assumes Glslang supports HLSL compilation.  The instructions
++below assume you're building Glslang from sources, and in a subtree
++of `shaderc/third_party`.  In that scenario, Glslang's HLSL support
++is automatically enabled.  Shaderc also can be built using a Glslang
++from outside the `shaderc/third_party` tree.  In that case you must
++ensure that that external Glslang is built with HLSL functionality.
++See Glslang's `ENABLE_HLSL` CMake setting.)
++
+ 1) Check out the source code:
+ 
+ ```sh
+diff --git a/glslc/test/option_dash_fhlsl_offsets.py b/glslc/test/option_dash_fhlsl_offsets.py
+index 631a2754..4682d310 100644
+--- a/glslc/test/option_dash_fhlsl_offsets.py
++++ b/glslc/test/option_dash_fhlsl_offsets.py
+@@ -19,6 +19,7 @@
+ 
+ # A GLSL shader with uniforms without explicit bindings.
+ GLSL_SHADER = """#version 450
++  layout(set=0, binding=0)
+   buffer B { float x; vec3 y; } my_ssbo;
+   void main() {
+     my_ssbo.x = 1.0;
+diff --git a/libshaderc/src/common_shaders_for_test.h b/libshaderc/src/common_shaders_for_test.h
+index 512742a3..c87ed76f 100644
+--- a/libshaderc/src/common_shaders_for_test.h
++++ b/libshaderc/src/common_shaders_for_test.h
+@@ -293,6 +293,7 @@ const char kShaderWithUniformsWithoutBindings[] =
+ // A GLSL vertex shader with a weirdly packed block.
+ const char kGlslShaderWeirdPacking[] =
+     R"(#version 450
++       layout(set=0, binding=0)
+        buffer B { float x; vec3 foo; } my_ssbo;
+        void main() { my_ssbo.x = 1.0; })";
+ 
+diff --git a/libshaderc_util/CMakeLists.txt b/libshaderc_util/CMakeLists.txt
+index 85e100c0..f8ae95d0 100644
+--- a/libshaderc_util/CMakeLists.txt
++++ b/libshaderc_util/CMakeLists.txt
+@@ -26,6 +26,9 @@ add_library(shaderc_util STATIC
+ shaderc_default_compile_options(shaderc_util)
+ target_include_directories(shaderc_util
+   PUBLIC include PRIVATE ${glslang_SOURCE_DIR})
++# We use parts of Glslang's HLSL compilation interface, which
++# now requires this preprocessor definition.
++add_definitions(-DENABLE_HLSL)
+ 
+ find_package(Threads)
+ target_link_libraries(shaderc_util PRIVATE
+diff --git a/libshaderc_util/src/compiler_test.cc b/libshaderc_util/src/compiler_test.cc
+index 1a0b21c4..f6207e69 100644
+--- a/libshaderc_util/src/compiler_test.cc
++++ b/libshaderc_util/src/compiler_test.cc
+@@ -119,6 +119,7 @@ const char kGlslVertShaderNoExplicitLocation[] =
+ // A GLSL vertex shader with a weirdly packed block.
+ const char kGlslShaderWeirdPacking[] =
+     R"(#version 450
++       layout(set = 0, binding = 0)
+        buffer B { float x; vec3 foo; } my_ssbo;
+        void main() { my_ssbo.x = 1.0; })";
+ 
diff --git a/graphics/shaderc/shaderc.SlackBuild b/graphics/shaderc/shaderc.SlackBuild
index bf2c19eafb..22b721cfbb 100644
--- a/graphics/shaderc/shaderc.SlackBuild
+++ b/graphics/shaderc/shaderc.SlackBuild
@@ -24,7 +24,7 @@
 
 PRGNAM=shaderc
 VERSION=${VERSION:-2019.0}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -76,9 +76,6 @@ sed -i '/build-version/d' glslc/CMakeLists.txt
 glslang_version="$(glslangValidator -v | grep 'Glslang Version')"
 
 # Create build-version.inc since git versioning is disabled.
-# There does not seem to be any good way to get the glslang version
-# so use the latest version from their github repo.
-# https://github.com/KhronosGroup/glslang
 # This is displayed with 'glslc --version'.
 cat > glslc/src/build-version.inc <<EOF
   "shaderc $VERSION\\n"
@@ -90,6 +87,11 @@ EOF
 # https://github.com/google/shaderc/pull/463
 patch -p1 < $CWD/fix-glslang-link-order.patch
 
+# Force Glslang to support HLSL in its interface
+# https://github.com/google/shaderc/commit/ec4ea59c6d523ee563611651e6a15b1c31ffcd2e
+# https://github.com/google/shaderc/pull/784
+patch -p1 < $CWD/fix-glslang-build.patch
+
 mkdir -p build
 cd build
   cmake \