LibGL: Implement `glGetMaterial`

5 files changed, 76 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index 0025649cf3..2c15a30ffe 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/Userland/Libraries/LibGL/GL/gl.h
@@ -588,6 +588,8 @@ GLAPI void glGetFloatv(GLenum pname, GLfloat* params);
 GLAPI void glGetIntegerv(GLenum pname, GLint* data);
 GLAPI void glGetLightfv(GLenum light, GLenum pname, GLfloat* params);
 GLAPI void glGetLightiv(GLenum light, GLenum pname, GLint* params);
+GLAPI void glGetMaterialfv(GLenum face, GLenum pname, GLfloat* params);
+GLAPI void glGetMaterialiv(GLenum face, GLenum pname, GLint* params);
 GLAPI void glDepthMask(GLboolean flag);
 GLAPI void glEnableClientState(GLenum cap);
 GLAPI void glDisableClientState(GLenum cap);
diff --git a/Userland/Libraries/LibGL/GLContext.h b/Userland/Libraries/LibGL/GLContext.h
index 3c15c1f360..e14df5adbd 100644
--- a/Userland/Libraries/LibGL/GLContext.h
+++ b/Userland/Libraries/LibGL/GLContext.h
@@ -120,6 +120,7 @@ public:
     virtual void gl_materialfv(GLenum face, GLenum pname, GLfloat const* params) = 0;
     virtual void gl_color_material(GLenum face, GLenum mode) = 0;
     virtual void gl_get_light(GLenum light, GLenum pname, void* params, GLenum type) = 0;
+    virtual void gl_get_material(GLenum face, GLenum pname, void* params, GLenum type) = 0;
     virtual void present() = 0;
 };
 
diff --git a/Userland/Libraries/LibGL/GLLights.cpp b/Userland/Libraries/LibGL/GLLights.cpp
index a7472671c6..78b9050019 100644
--- a/Userland/Libraries/LibGL/GLLights.cpp
+++ b/Userland/Libraries/LibGL/GLLights.cpp
@@ -72,3 +72,13 @@ void glGetLightiv(GLenum light, GLenum pname, GLint* params)
 {
     g_gl_context->gl_get_light(light, pname, params, GL_INT);
 }
+
+void glGetMaterialfv(GLenum face, GLenum pname, GLfloat* params)
+{
+    g_gl_context->gl_get_material(face, pname, params, GL_FLOAT);
+}
+
+void glGetMaterialiv(GLenum face, GLenum pname, GLint* params)
+{
+    g_gl_context->gl_get_material(face, pname, params, GL_INT);
+}
diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.cpp b/Userland/Libraries/LibGL/SoftwareGLContext.cpp
index ec4aa6ed8a..4f73aba1f4 100644
--- a/Userland/Libraries/LibGL/SoftwareGLContext.cpp
+++ b/Userland/Libraries/LibGL/SoftwareGLContext.cpp
@@ -3577,4 +3577,64 @@ void SoftwareGLContext::get_light_param(GLenum light, GLenum pname, T* params)
     }
 }
 
+void SoftwareGLContext::gl_get_material(GLenum face, GLenum pname, void* params, GLenum type)
+{
+    APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_get_material, face, pname, params, type);
+    RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
+    RETURN_WITH_ERROR_IF(!(pname == GL_AMBIENT || pname == GL_DIFFUSE || pname == GL_SPECULAR || pname == GL_EMISSION), GL_INVALID_ENUM);
+    RETURN_WITH_ERROR_IF(!(face == GL_FRONT || face == GL_BACK), GL_INVALID_ENUM);
+
+    Face material_face = Front;
+    switch (face) {
+    case GL_FRONT:
+        material_face = Front;
+        break;
+    case GL_BACK:
+        material_face = Back;
+        break;
+    }
+
+    if (type == GL_FLOAT)
+        get_material_param<GLfloat>(material_face, pname, static_cast<GLfloat*>(params));
+    else if (type == GL_INT)
+        get_material_param<GLint>(material_face, pname, static_cast<GLint*>(params));
+    else
+        VERIFY_NOT_REACHED();
+}
+
+template<typename T>
+void SoftwareGLContext::get_material_param(Face face, GLenum pname, T* params)
+{
+    auto const& material = m_material_states[face];
+    switch (pname) {
+    case GL_AMBIENT:
+        params[0] = static_cast<T>(material.ambient.x());
+        params[1] = static_cast<T>(material.ambient.y());
+        params[2] = static_cast<T>(material.ambient.z());
+        params[3] = static_cast<T>(material.ambient.w());
+        break;
+    case GL_DIFFUSE:
+        params[0] = static_cast<T>(material.diffuse.x());
+        params[1] = static_cast<T>(material.diffuse.y());
+        params[2] = static_cast<T>(material.diffuse.z());
+        params[3] = static_cast<T>(material.diffuse.w());
+        break;
+    case GL_SPECULAR:
+        params[0] = static_cast<T>(material.specular.x());
+        params[1] = static_cast<T>(material.specular.y());
+        params[2] = static_cast<T>(material.specular.z());
+        params[3] = static_cast<T>(material.specular.w());
+        break;
+    case GL_EMISSION:
+        params[0] = static_cast<T>(material.emissive.x());
+        params[1] = static_cast<T>(material.emissive.y());
+        params[2] = static_cast<T>(material.emissive.z());
+        params[3] = static_cast<T>(material.emissive.w());
+        break;
+    case GL_SHININESS:
+        *params = material.shininess;
+        break;
+    }
+}
+
 }
diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.h b/Userland/Libraries/LibGL/SoftwareGLContext.h
index a29acf3ab6..00ecdd1941 100644
--- a/Userland/Libraries/LibGL/SoftwareGLContext.h
+++ b/Userland/Libraries/LibGL/SoftwareGLContext.h
@@ -151,6 +151,7 @@ public:
     virtual void gl_materialfv(GLenum face, GLenum pname, GLfloat const* params) override;
     virtual void gl_color_material(GLenum face, GLenum mode) override;
     virtual void gl_get_light(GLenum light, GLenum pname, void* params, GLenum type) override;
+    virtual void gl_get_material(GLenum face, GLenum pname, void* params, GLenum type) override;
     virtual void present() override;
 
 private:
@@ -184,6 +185,8 @@ private:
     void get_floating_point(GLenum pname, T* params);
     template<typename T>
     void get_light_param(GLenum light, GLenum pname, T* params);
+    template<typename T>
+    void get_material_param(Face face, GLenum pname, T* params);
 
     void invoke_list(size_t list_index);
     [[nodiscard]] bool should_append_to_listing() const { return m_current_listing_index.has_value(); }