LibGL: Implement glHint()

Userland/Libraries/LibGL/GL/gl.h

@@ -92,6 +92,19 @@ extern "C" {
 #define GL_CW 0x0900
 #define GL_CCW 0x0901
 
+// Hint enums
+#define GL_DONT_CARE 0x1100
+#define GL_FASTEST 0x1101
+#define GL_NICEST 0x1102
+
+#define GL_PERSPECTIVE_CORRECTION_HINT 0x0C50
+#define GL_POINT_SMOOTH_HINT 0x0C51
+#define GL_LINE_SMOOTH_HINT 0x0C52
+#define GL_POLYGON_SMOOTH_HINT 0x0C53
+#define GL_FOG_HINT 0x0C54
+#define GL_GENERATE_MIPMAP_HINT 0x8192
+#define GL_TEXTURE_COMPRESSION_HINT 0x84EF
+
 // Listing enums
 #define GL_COMPILE 0x1300
 #define GL_COMPILE_AND_EXECUTE 0x1301
@@ -190,6 +203,7 @@ GLAPI void glFinish();
 GLAPI void glBlendFunc(GLenum sfactor, GLenum dfactor);
 GLAPI void glShadeModel(GLenum mode);
 GLAPI void glAlphaFunc(GLenum func, GLclampf ref);
+GLAPI void glHint(GLenum target, GLenum mode);
 
 #ifdef __cplusplus
 }

Userland/Libraries/LibGL/GLContext.h

@@ -52,6 +52,7 @@ public:
     virtual void gl_blend_func(GLenum src_factor, GLenum dst_factor) = 0;
     virtual void gl_shade_model(GLenum mode) = 0;
     virtual void gl_alpha_func(GLenum func, GLclampf ref) = 0;
+    virtual void gl_hint(GLenum target, GLenum mode) = 0;
 
     virtual void present() = 0;
 };

Userland/Libraries/LibGL/GLUtils.cpp

@@ -62,10 +62,15 @@ GLenum glGetError()
 
 void glFlush()
 {
-    return g_gl_context->gl_flush();
+    g_gl_context->gl_flush();
 }
 
 void glFinish()
 {
-    return g_gl_context->gl_finish();
+    g_gl_context->gl_finish();
+}
+
+void glHint(GLenum target, GLenum mode)
+{
+    g_gl_context->gl_hint(target, mode);
 }

Userland/Libraries/LibGL/SoftwareGLContext.cpp

@@ -979,6 +979,36 @@ void SoftwareGLContext::gl_alpha_func(GLenum func, GLclampf ref)
     m_rasterizer.set_options(options);
 }
 
+void SoftwareGLContext::gl_hint(GLenum target, GLenum mode)
+{
+    APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(gl_hint, target, mode);
+
+    if (m_in_draw_state) {
+        m_error = GL_INVALID_OPERATION;
+        return;
+    }
+
+    if (target != GL_PERSPECTIVE_CORRECTION_HINT
+        && target != GL_POINT_SMOOTH_HINT
+        && target != GL_LINE_SMOOTH_HINT
+        && target != GL_POLYGON_SMOOTH_HINT
+        && target != GL_FOG_HINT
+        && target != GL_GENERATE_MIPMAP_HINT
+        && target != GL_TEXTURE_COMPRESSION_HINT) {
+        m_error = GL_INVALID_ENUM;
+        return;
+    }
+
+    if (mode != GL_DONT_CARE
+        && mode != GL_FASTEST
+        && mode != GL_NICEST) {
+        m_error = GL_INVALID_ENUM;
+        return;
+    }
+
+    // According to the spec implementors are free to ignore glHint. So we do.
+}
+
 void SoftwareGLContext::present()
 {
     m_rasterizer.blit_to(*m_frontbuffer);

Userland/Libraries/LibGL/SoftwareGLContext.h

@@ -58,6 +58,7 @@ public:
     virtual void gl_blend_func(GLenum src_factor, GLenum dst_factor) override;
     virtual void gl_shade_model(GLenum mode) override;
     virtual void gl_alpha_func(GLenum func, GLclampf ref) override;
+    virtual void gl_hint(GLenum target, GLenum mode) override;
 
     virtual void present() override;
 
@@ -170,7 +171,8 @@ private:
             decltype(&SoftwareGLContext::gl_call_list),
             decltype(&SoftwareGLContext::gl_blend_func),
             decltype(&SoftwareGLContext::gl_shade_model),
-            decltype(&SoftwareGLContext::gl_alpha_func)>;
+            decltype(&SoftwareGLContext::gl_alpha_func),
+            decltype(&SoftwareGLContext::gl_hint)>;
 
         using ExtraSavedArguments = Variant<
             FloatMatrix4x4>;