From 0abb7df09be1579b450e852686050183a1ccffdf Mon Sep 17 00:00:00 2001
From: Jelle Raaijmakers <jelle@gmta.nl>
Date: Sun, 8 May 2022 01:43:43 +0200
Subject: [PATCH] LibGL+LibGPU: Implement `GL_LINE_SMOOTH` context parameter

---
 Userland/Libraries/LibGL/ContextParameter.cpp | 12 ++++++++++++
 Userland/Libraries/LibGL/GL/gl.h              |  1 +
 Userland/Libraries/LibGL/GLContext.h          |  1 +
 Userland/Libraries/LibGPU/RasterizerOptions.h |  1 +
 4 files changed, 15 insertions(+)

diff --git a/Userland/Libraries/LibGL/ContextParameter.cpp b/Userland/Libraries/LibGL/ContextParameter.cpp
index 566b93feb1..1b702a2f19 100644
--- a/Userland/Libraries/LibGL/ContextParameter.cpp
+++ b/Userland/Libraries/LibGL/ContextParameter.cpp
@@ -50,6 +50,8 @@ Optional<ContextParameter> GLContext::get_context_parameter(GLenum name)
         return ContextParameter { .type = GL_INT, .value = { .integer_value = sizeof(float) * 8 } };
     case GL_LIGHTING:
         return ContextParameter { .type = GL_BOOL, .is_capability = true, .value = { .boolean_value = m_lighting_enabled } };
+    case GL_LINE_SMOOTH:
+        return ContextParameter { .type = GL_BOOL, .is_capability = true, .value = { .boolean_value = m_line_smooth } };
     case GL_MAX_LIGHTS:
         return ContextParameter { .type = GL_INT, .value = { .integer_value = static_cast<GLint>(m_device_info.num_lights) } };
     case GL_MAX_MODELVIEW_STACK_DEPTH:
@@ -213,6 +215,11 @@ void GLContext::gl_disable(GLenum capability)
         m_light_states.at(capability - GL_LIGHT0).is_enabled = false;
         m_light_state_is_dirty = true;
         break;
+    case GL_LINE_SMOOTH:
+        m_line_smooth = false;
+        rasterizer_options.line_smooth = false;
+        update_rasterizer_options = true;
+        break;
     case GL_NORMALIZE:
         m_normalize = false;
         rasterizer_options.normalization_enabled = false;
@@ -347,6 +354,11 @@ void GLContext::gl_enable(GLenum capability)
         m_light_states.at(capability - GL_LIGHT0).is_enabled = true;
         m_light_state_is_dirty = true;
         break;
+    case GL_LINE_SMOOTH:
+        m_line_smooth = true;
+        rasterizer_options.line_smooth = true;
+        update_rasterizer_options = true;
+        break;
     case GL_NORMALIZE:
         m_normalize = true;
         rasterizer_options.normalization_enabled = true;
diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index 896526dcdd..7f1a7522bf 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/Userland/Libraries/LibGL/GL/gl.h
@@ -60,6 +60,7 @@ extern "C" {
 #define GL_COLOR_BUFFER_BIT 0x04000
 
 // Enable capabilities
+#define GL_LINE_SMOOTH 0x0B20
 #define GL_POLYGON_MODE 0x0B40
 #define GL_POLYGON_SMOOTH 0x0B41
 #define GL_POLYGON_STIPPLE 0x0B42
diff --git a/Userland/Libraries/LibGL/GLContext.h b/Userland/Libraries/LibGL/GLContext.h
index a6c82a15e6..9dc1f6c413 100644
--- a/Userland/Libraries/LibGL/GLContext.h
+++ b/Userland/Libraries/LibGL/GLContext.h
@@ -488,6 +488,7 @@ private:
     float m_point_size { 1.f };
 
     // Line drawing configuration
+    bool m_line_smooth { false };
     float m_line_width { 1.f };
 
     // Lighting configuration
diff --git a/Userland/Libraries/LibGPU/RasterizerOptions.h b/Userland/Libraries/LibGPU/RasterizerOptions.h
index d74d7e912a..cd7cb3563c 100644
--- a/Userland/Libraries/LibGPU/RasterizerOptions.h
+++ b/Userland/Libraries/LibGPU/RasterizerOptions.h
@@ -38,6 +38,7 @@ struct RasterizerOptions {
     bool fog_enabled { false };
     float fog_start { 0.0f };
     float fog_end { 1.0f };
+    bool line_smooth { false };
     bool point_smooth { false };
     float point_size { 1.f };
     bool scissor_enabled { false };