LibGL: Implement glScalef

Userland/Libraries/LibGL/GL/gl.h

@@ -83,6 +83,7 @@ GLAPI void glMatrixMode(GLenum mode);
 GLAPI void glPushMatrix();
 GLAPI void glPopMatrix();
 GLAPI void glRotatef(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void glScalef(GLfloat x, GLfloat y, GLfloat z);
 GLAPI void glTranslatef(GLfloat x, GLfloat y, GLfloat z);
 GLAPI void glVertex3f(GLfloat x, GLfloat y, GLfloat z);
 GLAPI void glViewport(GLint x, GLint y, GLsizei width, GLsizei height);

Userland/Libraries/LibGL/GLContext.h

@@ -29,6 +29,7 @@ public:
     virtual void gl_push_matrix() = 0;
     virtual void gl_pop_matrix() = 0;
     virtual void gl_rotate(GLdouble angle, GLdouble x, GLdouble y, GLdouble z) = 0;
+    virtual void gl_scale(GLdouble x, GLdouble y, GLdouble z) = 0;
     virtual void gl_translate(GLdouble x, GLdouble y, GLdouble z) = 0;
     virtual void gl_vertex(GLdouble x, GLdouble y, GLdouble z, GLdouble w) = 0;
     virtual void gl_viewport(GLint x, GLint y, GLsizei width, GLsizei height) = 0;

Userland/Libraries/LibGL/GLVert.cpp

@@ -30,6 +30,11 @@ void glRotatef(GLfloat angle, GLfloat x, GLfloat y, GLfloat z)
     g_gl_context->gl_rotate(angle, x, y, z);
 }
 
+void glScalef(GLfloat x, GLfloat y, GLfloat z)
+{
+    g_gl_context->gl_scale(x, y, z);
+}
+
 void glTranslatef(GLfloat x, GLfloat y, GLfloat z)
 {
     g_gl_context->gl_translate(x, y, z);

Userland/Libraries/LibGL/SoftwareGLContext.cpp

@@ -594,6 +594,22 @@ void SoftwareGLContext::gl_rotate(GLdouble angle, GLdouble x, GLdouble y, GLdoub
     m_error = GL_NO_ERROR;
 }
 
+void SoftwareGLContext::gl_scale(GLdouble x, GLdouble y, GLdouble z)
+{
+    if (m_in_draw_state) {
+        m_error = GL_INVALID_OPERATION;
+        return;
+    }
+
+    if (m_current_matrix_mode == GL_MODELVIEW) {
+        m_model_view_matrix = m_model_view_matrix * FloatMatrix4x4::scale({ static_cast<float>(x), static_cast<float>(y), static_cast<float>(z) });
+    } else if (m_current_matrix_mode == GL_PROJECTION) {
+        m_projection_matrix = m_projection_matrix * FloatMatrix4x4::scale({ static_cast<float>(x), static_cast<float>(y), static_cast<float>(z) });
+    }
+
+    m_error = GL_NO_ERROR;
+}
+
 void SoftwareGLContext::gl_translate(GLdouble x, GLdouble y, GLdouble z)
 {
     if (m_in_draw_state) {

Userland/Libraries/LibGL/SoftwareGLContext.h

@@ -29,6 +29,7 @@ public:
     virtual void gl_push_matrix() override;
     virtual void gl_pop_matrix() override;
     virtual void gl_rotate(GLdouble angle, GLdouble x, GLdouble y, GLdouble z) override;
+    virtual void gl_scale(GLdouble x, GLdouble y, GLdouble z) override;
     virtual void gl_translate(GLdouble x, GLdouble y, GLdouble z) override;
     virtual void gl_vertex(GLdouble x, GLdouble y, GLdouble z, GLdouble w) override;
     virtual void gl_viewport(GLint x, GLint y, GLsizei width, GLsizei height) override;