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, 34 insertions, 20 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_2D_nodelink_vert.glsl b/source/blender/gpu/shaders/gpu_shader_2D_nodelink_vert.glsl
index 8325568988c..3d3a042de65 100644
--- a/source/blender/gpu/shaders/gpu_shader_2D_nodelink_vert.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_2D_nodelink_vert.glsl
@@ -4,13 +4,15 @@
 
 #define MID_VERTEX 65
 
+#ifndef USE_GPU_SHADER_CREATE_INFO
+
 /* u is position along the curve, defining the tangent space.
  * v is "signed" distance (compressed to [0..1] range) from the pos in expand direction */
 in vec2 uv;
 in vec2 pos; /* verts position in the curve tangent space */
 in vec2 expand;
 
-#ifdef USE_INSTANCE
+#  ifdef USE_INSTANCE
 /* Instance attrs. */
 in vec2 P0;
 in vec2 P1;
@@ -27,21 +29,10 @@ in float dash_alpha;
 
 uniform vec4 colors[6];
 
-#  define colStart (colid_doarrow[0] < 3 ? start_color : colors[colid_doarrow[0]])
-#  define colEnd (colid_doarrow[1] < 3 ? end_color : colors[colid_doarrow[1]])
-#  define colShadow colors[colid_doarrow[2]]
-#  define doArrow (colid_doarrow[3] != 0)
-#  define doMuted (domuted[0] != 0)
-
-#else
+#  else
 /* Single curve drawcall, use uniform. */
 uniform vec2 bezierPts[4];
 
-#  define P0 bezierPts[0]
-#  define P1 bezierPts[1]
-#  define P2 bezierPts[2]
-#  define P3 bezierPts[3]
-
 uniform vec4 colors[3];
 uniform bool doArrow;
 uniform bool doMuted;
@@ -50,11 +41,7 @@ uniform float thickness;
 uniform float dash_factor;
 uniform float dash_alpha;
 
-#  define colShadow colors[0]
-#  define colStart colors[1]
-#  define colEnd colors[2]
-
-#endif
+#  endif
 
 uniform float expandSize;
 uniform float arrowSize;
@@ -67,6 +54,33 @@ flat out float lineLength;
 flat out float dashFactor;
 flat out float dashAlpha;
 flat out int isMainLine;
+#endif
+
+#ifdef USE_INSTANCE
+#  define colStart (colid_doarrow[0] < 3 ? start_color : node_link_data.colors[colid_doarrow[0]])
+#  define colEnd (colid_doarrow[1] < 3 ? end_color : node_link_data.colors[colid_doarrow[1]])
+#  define colShadow node_link_data.colors[colid_doarrow[2]]
+#  define doArrow (colid_doarrow[3] != 0)
+#  define doMuted (domuted[0] != 0)
+
+#else
+#  define P0 node_link_data.bezierPts[0]
+#  define P1 node_link_data.bezierPts[1]
+#  define P2 node_link_data.bezierPts[2]
+#  define P3 node_link_data.bezierPts[3]
+#  define cols node_link_data.colors
+#  define doArrow node_link_data.doArrow
+#  define doMuted node_link_data.doMuted
+#  define dim_factor node_link_data.dim_factor
+#  define thickness node_link_data.thickness
+#  define dash_factor node_link_data.dash_factor
+#  define dash_alpha node_link_data.dash_alpha
+
+#  define colShadow node_link_data.colors[0]
+#  define colStart node_link_data.colors[1]
+#  define colEnd node_link_data.colors[2]
+
+#endif
 
 /* Define where along the noodle the gradient will starts and ends.
  * Use 0.25 instead of 0.35-0.65, because of a visual shift issue. */
@@ -101,7 +115,7 @@ void main(void)
   vec2 normal = tangent.yx * vec2(-1.0, 1.0);
 
   /* Position vertex on the curve tangent space */
-  point += (pos.x * tangent + pos.y * normal) * arrowSize;
+  point += (pos.x * tangent + pos.y * normal) * node_link_data.arrowSize;
 
   gl_Position = ModelViewProjectionMatrix * vec4(point, 0.0, 1.0);
 
@@ -139,7 +153,7 @@ void main(void)
   finalColor[3] *= dim_factor;
 
   /* Expand into a line */
-  gl_Position.xy += exp_axis * expandSize * expand_dist * thickness;
+  gl_Position.xy += exp_axis * node_link_data.expandSize * expand_dist * thickness;
 
   /* If the link is not muted or is not a reroute arrow the points are squashed to the center of
    * the line. Magic numbers are defined in drawnode.c */