GPUShaderCreateInfo for interface abstraction

This is a first part of the Shader Create Info system could be.

A shader create info provides a way to define shader structure, resources
and interfaces. This makes for a quick way to provide backend agnostic
binding informations while also making shader variations easy to declare.

- Clear source input (only one file). Cleans up the GPU api since we can create a
  shader from one descriptor
- Resources and interfaces are generated by the backend (much simpler than parsing).
- Bindings are explicit from position in the array.
- GPUShaderInterface becomes a trivial translation of enums and string copy.
- No external dependency to third party lib.
- Cleaner code, less fragmentation of resources in several libs.
- Easy to modify / extend at runtime.
- no parser involve, very easy to code.
- Does not hold any data, can be static and kept on disc.
- Could hold precompiled bytecode for static shaders.

This also includes a new global dependency system.
GLSL shaders can include other sources by using #pragma BLENDER_REQUIRE(...).

This patch already migrated several builtin shaders. Other shaders should be migrated
one at a time, and could be done inside master.

There is a new compile directive `WITH_GPU_SHADER_BUILDER` this is an optional
directive for linting shaders to increase turn around time.

What is remaining:
- pyGPU API {T94975}
- Migration of other shaders. This could be a community effort.

Reviewed By: jbakker

Maniphest Tasks: T94975

Differential Revision: https://developer.blender.org/D13360

1 files changed, 5 insertions, 4 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_image_shuffle_color_frag.glsl b/source/blender/gpu/shaders/gpu_shader_image_shuffle_color_frag.glsl
index ed69184ef14..e8bfb70b897 100644
--- a/source/blender/gpu/shaders/gpu_shader_image_shuffle_color_frag.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_image_shuffle_color_frag.glsl
@@ -1,15 +1,16 @@
-
+#ifndef USE_GPU_SHADER_CREATE_INFO
 in vec2 texCoord_interp;
 out vec4 fragColor;
 
 uniform sampler2D image;
 uniform vec4 color;
 uniform vec4 shuffle;
+#endif
 
 void main()
 {
-  vec4 sample = texture(image, texCoord_interp);
-  fragColor = vec4(sample.r * shuffle.r + sample.g * shuffle.g + sample.b * shuffle.b +
-                   sample.a * shuffle.a) *
+  vec4 sampled_color = texture(image, texCoord_interp);
+  fragColor = vec4(sampled_color.r * shuffle.r + sampled_color.g * shuffle.g +
+                   sampled_color.b * shuffle.b + sampled_color.a * shuffle.a) *
               color;
 }