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, 3 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_image_overlays_stereo_merge_frag.glsl b/source/blender/gpu/shaders/gpu_shader_image_overlays_stereo_merge_frag.glsl
index c6e9860d940..9b1e6fe9d23 100644
--- a/source/blender/gpu/shaders/gpu_shader_image_overlays_stereo_merge_frag.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_image_overlays_stereo_merge_frag.glsl
@@ -7,18 +7,20 @@
 
 /* Composite stereo textures */
 
+#ifndef USE_GPU_SHADER_CREATE_INFO
 uniform sampler2D imageTexture;
 uniform sampler2D overlayTexture;
 
 uniform int stereoDisplaySettings;
 
+layout(location = 0) out vec4 imageColor;
+layout(location = 1) out vec4 overlayColor;
+#endif
+
 #define stereo_display_mode (stereoDisplaySettings & ((1 << 3) - 1))
 #define stereo_interlace_mode ((stereoDisplaySettings >> 3) & ((1 << 3) - 1))
 #define stereo_interlace_swap bool(stereoDisplaySettings >> 6)
 
-layout(location = 0) out vec4 imageColor;
-layout(location = 1) out vec4 overlayColor;
-
 bool interlace(ivec2 texel)
 {
   int interlace_mode = stereo_interlace_mode;