Renderer2D_Text.glsl Shader link error

[yanshuicc]

Renderer2D_Text.glsl file could be compiled successfully, but link error.

environment:
CPU: 13th intel i9-13900hx x64
OS System: win 11 home
Graphics card: NVIDIA GeForce RTX 4060 Laptop GPU/PCIe/SSE2
gl version: 4.6.0 NVIDIA 560.81

I have tried to fix the error by change code order, but i dont know the reason. I'll appreciate it if there is someone can explain it.
thank you!!

[PhilikusHD]

Hi there, figured out that this can be fixed by getting rid of the struct:

struct VertexOutput
{
    vec4 Color;
    vec2 TexCoord;
};

layout(location = 0) out VertexOutput Output;
layout(location = 2) out flat int v_EntityID;

would therefore turn into

layout(location = 0) out vec4 v_Color;
layout(location = 1) out vec2 v_TexCoord;
layout(location = 2) out flat int v_EntityID;

same would happen in the fragment shader.

layout(location = 0) out vec4 o_Color;
layout(location = 1) out int o_EntityID;

struct VertexOutput
{
    vec4 Color;
    vec2 TexCoord;
};
layout(location = 0) in VertexOutput Input;
layout(location = 2) in int v_EntityID;

turns into

layout(location = 0) out vec4 o_Color;
layout(location = 1) out int o_EntityID;

layout(location = 0) in vec4 v_Color;
layout(location = 1) in vec2 v_TexCoord;
layout(location = 2) in flat int v_EntityID;

my best guess for why this is happening is that it has to do with the shader compiler flattening the struct and getting confused when mapping out the locations. By not having a struct we take away the need for the shader compiler to map anything from the struct to the locations and therefore it works. Hope I could help even though my explanation wasn't the best haha

[ClonkAndre]

Removing the struct did indeed work, tho make sure to delete the shader cache so it can rebuild them.