LibGL: Implement glFogf

akimdi · Aug 25, 2021 · f55d2a2 · f55d2a2
1 parent 7f1cd54
commit f55d2a2
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Showing 6 changed files with 27 additions and 0 deletions.
diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
@@ -375,6 +375,7 @@ GLAPI void glDepthRange(GLdouble nearVal, GLdouble farVal);
 GLAPI void glDepthFunc(GLenum func);
 GLAPI void glPolygonMode(GLenum face, GLenum mode);
 GLAPI void glFogfv(GLenum mode, GLfloat* params);
+GLAPI void glFogf(GLenum pname, GLfloat param);
 
 #ifdef __cplusplus
 }

diff --git a/Userland/Libraries/LibGL/GLContext.h b/Userland/Libraries/LibGL/GLContext.h
@@ -78,6 +78,7 @@ class GLContext {
  virtual void gl_depth_func(GLenum func) = 0;
  virtual void gl_polygon_mode(GLenum face, GLenum mode) = 0;
  virtual void gl_fogfv(GLenum pname, GLfloat* params) = 0;
+ virtual void gl_fogf(GLenum pname, GLfloat params) = 0;
 
  virtual void present() = 0;
 };

diff --git a/Userland/Libraries/LibGL/GLFog.cpp b/Userland/Libraries/LibGL/GLFog.cpp
@@ -13,3 +13,8 @@ void glFogfv(GLenum pname, GLfloat* params)
 {
  g_gl_context->gl_fogfv(pname, params);
 }
+
+void glFogf(GLenum pname, GLfloat param)
+{
+ g_gl_context->gl_fogf(pname, param);
+}
diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.cpp b/Userland/Libraries/LibGL/SoftwareGLContext.cpp
@@ -1765,6 +1765,24 @@ void SoftwareGLContext::gl_fogfv(GLenum pname, GLfloat* params)
  m_rasterizer.set_options(options);
 }
 
+void SoftwareGLContext::gl_fogf(GLenum pname, GLfloat param)
+{
+ RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
+ RETURN_WITH_ERROR_IF(param < 0.0f, GL_INVALID_VALUE);
+
+ auto options = m_rasterizer.options();
+
+ switch (pname) {
+ case GL_FOG_DENSITY:
+ options.fog_density = param;
+ break;
+ default:
+ RETURN_WITH_ERROR_IF(true, GL_INVALID_ENUM);
+ }
+
+ m_rasterizer.set_options(options);
+}
+
 void SoftwareGLContext::present()
 {
  m_rasterizer.blit_to(*m_frontbuffer);

diff --git a/Userland/Libraries/LibGL/SoftwareGLContext.h b/Userland/Libraries/LibGL/SoftwareGLContext.h
@@ -88,6 +88,7 @@ class SoftwareGLContext : public GLContext {
  virtual void gl_depth_func(GLenum func) override;
  virtual void gl_polygon_mode(GLenum face, GLenum mode) override;
  virtual void gl_fogfv(GLenum pname, GLfloat* params) override;
+ virtual void gl_fogf(GLenum pname, GLfloat param) override;
  virtual void present() override;
 
 private:

diff --git a/Userland/Libraries/LibGL/SoftwareRasterizer.h b/Userland/Libraries/LibGL/SoftwareRasterizer.h
@@ -39,6 +39,7 @@ struct RasterizerOptions {
  0.0f,
  0.0f,
  };
+ GLfloat fog_density { 1.0f };
 };
 
 class SoftwareRasterizer final {