video_core/host_shaders: Add CMake integration for string shaders

Add the necessary CMake code to copy the contents in a string source
shader (GLSL or GLASM) to a header file then consumed by video_core
files.

This allows editting GLSL in its own files without having to maintain
them in source files.

For now, only OpenGL presentation shaders are moved, but we can add
GLASM presentation shaders and static SPIR-V generation through
glslangValidator in the future.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/video_core/host_shaders/opengl_present.frag b/src/video_core/host_shaders/opengl_present.frag
new file mode 100644
index 000000000..8a4cb024b
--- /dev/null
+++ b/src/video_core/host_shaders/opengl_present.frag
@@ -0,0 +1,10 @@
+#version 430 core
+
+layout (location = 0) in vec2 frag_tex_coord;
+layout (location = 0) out vec4 color;
+
+layout (binding = 0) uniform sampler2D color_texture;
+
+void main() {
+    color = vec4(texture(color_texture, frag_tex_coord).rgb, 1.0f);
+}