From c08dfe063abd30ce2d00042983fa2c3197dc1c8b Mon Sep 17 00:00:00 2001
From: Jesse Buhagiar <jooster669@gmail.com>
Date: Fri, 25 Mar 2022 22:50:36 +1100
Subject: [PATCH] LibGL: Add stub for glCopyTexSubImage2D

---
 Userland/Libraries/LibGL/GL/gl.h       |  1 +
 Userland/Libraries/LibGL/GLContext.cpp | 12 ++++++++++++
 Userland/Libraries/LibGL/GLContext.h   |  4 +++-
 Userland/Libraries/LibGL/GLTexture.cpp |  5 +++++
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index cebceefb065..7824f41b993 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/Userland/Libraries/LibGL/GL/gl.h
@@ -681,6 +681,7 @@ GLAPI void glGetTexLevelParameteriv(GLenum target, GLint level, GLenum pname, GL
 GLAPI void glPointSize(GLfloat size);
 GLAPI void glClipPlane(GLenum plane, GLdouble const* equation);
 GLAPI void glArrayElement(GLint i);
+GLAPI void glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 
 #ifdef __cplusplus
 }
diff --git a/Userland/Libraries/LibGL/GLContext.cpp b/Userland/Libraries/LibGL/GLContext.cpp
index 504eb6918d6..de736239233 100644
--- a/Userland/Libraries/LibGL/GLContext.cpp
+++ b/Userland/Libraries/LibGL/GLContext.cpp
@@ -3721,6 +3721,18 @@ void GLContext::get_material_param(Face face, GLenum pname, T* params)
     }
 }
 
+void GLContext::gl_copy_tex_sub_image_2d(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+    APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_copy_tex_sub_image_2d, target, level, xoffset, yoffset, x, y, width, height);
+    RETURN_WITH_ERROR_IF(!(target == GL_TEXTURE_2D || target == GL_TEXTURE_1D_ARRAY), GL_INVALID_ENUM);
+    RETURN_WITH_ERROR_IF(level < 0, GL_INVALID_VALUE);
+    RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
+
+    // FIXME: implement
+    dbgln_if(GL_DEBUG, "GLContext FIXME: implement gl_copy_tex_sub_image_2d({:#x}, {}, {}, {}, {}, {}, {}, {})",
+        target, level, xoffset, yoffset, x, y, width, height);
+}
+
 NonnullOwnPtr<GLContext> create_context(Gfx::Bitmap& bitmap)
 {
     // FIXME: Make driver selectable. This is currently hardcoded to LibSoftGPU
diff --git a/Userland/Libraries/LibGL/GLContext.h b/Userland/Libraries/LibGL/GLContext.h
index 47c575479f6..75701e07d6e 100644
--- a/Userland/Libraries/LibGL/GLContext.h
+++ b/Userland/Libraries/LibGL/GLContext.h
@@ -159,6 +159,7 @@ public:
     void gl_get_material(GLenum face, GLenum pname, void* params, GLenum type);
     void gl_clip_plane(GLenum plane, GLdouble const* equation);
     void gl_array_element(GLint i);
+    void gl_copy_tex_sub_image_2d(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
     void present();
 
 private:
@@ -402,7 +403,8 @@ private:
             decltype(&GLContext::gl_color_material),
             decltype(&GLContext::gl_get_light),
             decltype(&GLContext::gl_clip_plane),
-            decltype(&GLContext::gl_array_element)>;
+            decltype(&GLContext::gl_array_element),
+            decltype(&GLContext::gl_copy_tex_sub_image_2d)>;
 
         using ExtraSavedArguments = Variant<
             FloatMatrix4x4>;
diff --git a/Userland/Libraries/LibGL/GLTexture.cpp b/Userland/Libraries/LibGL/GLTexture.cpp
index adf43b416fd..7abaeaca920 100644
--- a/Userland/Libraries/LibGL/GLTexture.cpp
+++ b/Userland/Libraries/LibGL/GLTexture.cpp
@@ -111,3 +111,8 @@ void glGetTexLevelParameteriv(GLenum target, GLint level, GLenum pname, GLint* p
 {
     g_gl_context->gl_get_tex_parameter_integerv(target, level, pname, params);
 }
+
+void glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+    g_gl_context->gl_copy_tex_sub_image_2d(target, level, xoffset, yoffset, x, y, width, height);
+}