attempted amd bug detection

src/main/java/me/cortex/voxy/client/core/gl/Capabilities.java

@@ -2,11 +2,27 @@ package me.cortex.voxy.client.core.gl;
 
 import me.cortex.voxy.client.core.gl.shader.ShaderType;
 import org.lwjgl.opengl.GL;
+import org.lwjgl.opengl.GL11C;
 import org.lwjgl.opengl.GL20C;
+import org.lwjgl.opengl.GL30;
+import org.lwjgl.system.MemoryUtil;
 
-import static org.lwjgl.opengl.GL11.*;
+import java.util.Random;
+
+import static org.lwjgl.opengl.GL11.GL_NEAREST;
+import static org.lwjgl.opengl.GL11.GL_TEXTURE_2D;
+import static org.lwjgl.opengl.GL11.GL_TEXTURE_MAG_FILTER;
+import static org.lwjgl.opengl.GL11.GL_UNSIGNED_BYTE;
+import static org.lwjgl.opengl.GL15.glDeleteBuffers;
+import static org.lwjgl.opengl.GL30.GL_DEPTH_STENCIL;
+import static org.lwjgl.opengl.GL30C.GL_MAP_READ_BIT;
 import static org.lwjgl.opengl.GL32.glGetInteger64;
 import static org.lwjgl.opengl.GL43C.GL_MAX_SHADER_STORAGE_BLOCK_SIZE;
+import static org.lwjgl.opengl.GL44.GL_DYNAMIC_STORAGE_BIT;
+import static org.lwjgl.opengl.GL44.GL_MAP_COHERENT_BIT;
+import static org.lwjgl.opengl.GL45.glClearNamedFramebufferfi;
+import static org.lwjgl.opengl.GL45C.*;
+import static org.lwjgl.opengl.GL45C.glCreateFramebuffers;
 import static org.lwjgl.opengl.NVXGPUMemoryInfo.*;
 
 public class Capabilities {
@@ -27,7 +43,9 @@ public class Capabilities {
     public final boolean subgroup;
     public final boolean sparseBuffer;
     public final boolean isNvidia;
+    public final boolean isAmd;
     public final boolean nvBarryCoords;
+    public final boolean hasBrokenDepthSampler;
 
     public Capabilities() {
         var cap = GL.getCapabilities();
@@ -64,8 +82,10 @@ public class Capabilities {
         this.ssboMaxSize = glGetInteger64(GL_MAX_SHADER_STORAGE_BLOCK_SIZE);
 
         this.isMesa = glGetString(GL_VERSION).toLowerCase().contains("mesa");
-        this.isIntel = glGetString(GL_VENDOR).toLowerCase().contains("intel");
-        this.isNvidia = glGetString(GL_VENDOR).toLowerCase().contains("nvidia");
+        var vendor = glGetString(GL_VENDOR).toLowerCase();
+        this.isIntel = vendor.contains("intel");
+        this.isNvidia = vendor.contains("nvidia");
+        this.isAmd = vendor.contains("amd")||vendor.contains("radeon");
 
         if (this.canQueryGpuMemory) {
             this.totalDedicatedMemory = glGetInteger64(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX)*1024;//Since its in Kb
@@ -76,11 +96,91 @@ public class Capabilities {
         }
 
         this.nvBarryCoords = cap.GL_NV_fragment_shader_barycentric;
+
+        if (this.compute&&this.isAmd) {
+            this.hasBrokenDepthSampler = testDepthSampler();
+            if (this.hasBrokenDepthSampler) {
+                //throw new IllegalStateException("it bork, amd is bork");
+            }
+        } else {
+            this.hasBrokenDepthSampler = false;
+        }
     }
 
     public static void init() {
     }
 
+    private static boolean testDepthSampler() {
+        String src = """
+                #version 460 core
+                layout(local_size_x=1) in;
+                
+                layout(binding = 0) uniform sampler2D depthSampler;
+                layout(binding = 1) buffer OutData {
+                    float[] outData;
+                };
+                
+                void main() {
+                    outData[0] = texelFetch(depthSampler, ivec2(1, 1), 0).r;
+                }
+                """;
+        int program = GL20C.glCreateProgram();
+        {
+            int shader = GL20C.glCreateShader(ShaderType.COMPUTE.gl);
+            GL20C.glShaderSource(shader, src);
+            GL20C.glCompileShader(shader);
+            if (GL20C.glGetShaderi(shader, GL20C.GL_COMPILE_STATUS) != 1) {
+                GL20C.glDeleteShader(shader);
+                throw new IllegalStateException("Shader compile fail");
+            }
+            GL20C.glAttachShader(program, shader);
+            GL20C.glLinkProgram(program);
+            glDeleteShader(shader);
+        }
+
+        int buffer = glCreateBuffers();
+        glNamedBufferStorage(buffer, 4096, GL_DYNAMIC_STORAGE_BIT|GL_MAP_READ_BIT);
+
+        int tex = glCreateTextures(GL_TEXTURE_2D);
+        glTextureStorage2D(tex, 1, GL_DEPTH24_STENCIL8, 3, 3);
+        glTextureParameteri(tex, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTextureParameteri(tex, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+        int fb = glCreateFramebuffers();
+        glNamedFramebufferTexture(fb, GL_DEPTH_STENCIL_ATTACHMENT, tex, 0);
+
+        boolean isCorrect = true;
+        for (int i = 0; i <= 10; i++) {
+            float value = (float) (i/10.0);
+
+            nglClearNamedBufferSubData(buffer, GL_R32F, 0, 4096, GL_RED, GL_FLOAT, 0);//Zero the buffer
+            glClearNamedFramebufferfi(fb, GL_DEPTH_STENCIL, 0, value, 1);//Set the depth texture
+
+            glUseProgram(program);
+            glBindTextureUnit(0, tex);
+            GL30.glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, buffer);
+
+            glDispatchCompute(1,1,1);
+            glFinish();
+
+            long ptr = nglMapNamedBuffer(buffer, GL_READ_ONLY);
+            float gottenValue = MemoryUtil.memGetFloat(ptr);
+            glUnmapNamedBuffer(buffer);
+
+            glUseProgram(0);
+            glBindTextureUnit(0,0);
+            glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
+            isCorrect &= Math.abs(value - gottenValue)<0.0000001f;
+        }
+
+        glDeleteFramebuffers(fb);
+        glDeleteTextures(tex);
+        glDeleteBuffers(buffer);
+        glDeleteProgram(program);
+        return !isCorrect;
+    }
+
     private static boolean testShaderCompilesOk(ShaderType type, String src) {
         int shader = GL20C.glCreateShader(type.gl);
         GL20C.glShaderSource(shader, src);