From ea0df0b5da0247108bc7fe3c6a7c23f709802ef2 Mon Sep 17 00:00:00 2001
From: Jesse Buhagiar <jooster669@gmail.com>
Date: Sat, 24 Apr 2021 22:11:48 +1000
Subject: LibGL: Implement glScalef

---
 Userland/Libraries/LibGL/GL/gl.h               |  1 +
 Userland/Libraries/LibGL/GLContext.h           |  1 +
 Userland/Libraries/LibGL/GLVert.cpp            |  5 +++++
 Userland/Libraries/LibGL/SoftwareGLContext.cpp | 16 ++++++++++++++++
 Userland/Libraries/LibGL/SoftwareGLContext.h   |  1 +
 5 files changed, 24 insertions(+)

(limited to 'Userland/Libraries/LibGL')

diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index 9dfaefec82..9979f997cb 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/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);
diff --git a/Userland/Libraries/LibGL/GLContext.h b/Userland/Libraries/LibGL/GLContext.h
index 8e00018b25..48bc94d521 100644
--- a/Userland/Libraries/LibGL/GLContext.h
+++ b/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;
diff --git a/Userland/Libraries/LibGL/GLVert.cpp b/Userland/Libraries/LibGL/GLVert.cpp
index 394c39861f..e972741327 100644
--- a/Userland/Libraries/LibGL/GLVert.cpp
+++ b/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);
diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.cpp b/Userland/Libraries/LibGL/SoftwareGLContext.cpp
index c6b54c40ef..0b85ad1778 100644
--- a/Userland/Libraries/LibGL/SoftwareGLContext.cpp
+++ b/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) {
diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.h b/Userland/Libraries/LibGL/SoftwareGLContext.h
index 58bb859867..33fa7b3feb 100644
--- a/Userland/Libraries/LibGL/SoftwareGLContext.h
+++ b/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;
-- 
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