From 52930c8539c32537d24cc271b82a10183604f3db Mon Sep 17 00:00:00 2001
From: Vsevolod Kremianskii <vkremianskii@gmail.com>
Date: Mon, 15 Feb 2021 18:33:32 +0700
Subject: [PATCH] feat: Make shadow map resolution configurable

---
 src/program.cpp              | 3 +++
 src/render/types.h           | 1 +
 src/scene/pipeline/world.cpp | 5 ++---
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/program.cpp b/src/program.cpp
index f7ca8071..c2d0a42c 100644
--- a/src/program.cpp
+++ b/src/program.cpp
@@ -37,6 +37,7 @@ namespace reone {
 
 static const char kConfigFilename[] = "reone.cfg";
 
+static constexpr int kDefaultShadowResolution = 2048;
 static constexpr int kDefaultMusicVolume = 85;
 static constexpr int kDefaultVoiceVolume = 85;
 static constexpr int kDefaultSoundVolume = 85;
@@ -69,6 +70,7 @@ void Program::initOptions() {
         ("width", po::value<int>()->default_value(800), "window width")
         ("height", po::value<int>()->default_value(600), "window height")
         ("fullscreen", po::value<bool>()->default_value(false), "enable fullscreen")
+        ("shadowres", po::value<int>()->default_value(kDefaultShadowResolution), "shadow map resolution")
         ("musicvol", po::value<int>()->default_value(kDefaultMusicVolume), "music volume in percents")
         ("voicevol", po::value<int>()->default_value(kDefaultVoiceVolume), "voice volume in percents")
         ("soundvol", po::value<int>()->default_value(kDefaultSoundVolume), "sound volume in percents")
@@ -102,6 +104,7 @@ void Program::loadOptions() {
     _gameOpts.graphics.width = vars["width"].as<int>();
     _gameOpts.graphics.height = vars["height"].as<int>();
     _gameOpts.graphics.fullscreen = vars["fullscreen"].as<bool>();
+    _gameOpts.graphics.shadowResolution = vars["shadowres"].as<int>();
     _gameOpts.audio.musicVolume = vars["musicvol"].as<int>();
     _gameOpts.audio.voiceVolume = vars["voicevol"].as<int>();
     _gameOpts.audio.soundVolume = vars["soundvol"].as<int>();
diff --git a/src/render/types.h b/src/render/types.h
index 68cb4422..dfa3d3bd 100644
--- a/src/render/types.h
+++ b/src/render/types.h
@@ -74,6 +74,7 @@ struct GraphicsOptions {
     int width { 0 };
     int height { 0 };
     bool fullscreen { false };
+    int shadowResolution { 0 };
 };
 
 class IEventHandler {
diff --git a/src/scene/pipeline/world.cpp b/src/scene/pipeline/world.cpp
index 48bb0a55..3474ae83 100644
--- a/src/scene/pipeline/world.cpp
+++ b/src/scene/pipeline/world.cpp
@@ -42,7 +42,6 @@ namespace reone {
 
 namespace scene {
 
-static constexpr int kShadowResolution = 2048;
 static constexpr float kShadowFarPlane = 10000.0f;
 
 static bool g_wireframesEnabled = false;
@@ -115,7 +114,7 @@ void WorldRenderPipeline::init() {
     _shadowsDepth = make_unique<Texture>("shadows_depth", getTextureProperties(TextureUsage::CubeMapDepthBuffer));
     _shadowsDepth->init();
     _shadowsDepth->bind();
-    _shadowsDepth->clearPixels(kShadowResolution, kShadowResolution, PixelFormat::Depth);
+    _shadowsDepth->clearPixels(_opts.shadowResolution, _opts.shadowResolution, PixelFormat::Depth);
 
     _shadows.init();
     _shadows.bind();
@@ -134,7 +133,7 @@ void WorldRenderPipeline::render() {
 void WorldRenderPipeline::drawShadows() {
     if (!_scene->isShadowLightPresent()) return;
 
-    withViewport(glm::ivec4(0, 0, kShadowResolution, kShadowResolution), [this]() {
+    withViewport(glm::ivec4(0, 0, _opts.shadowResolution, _opts.shadowResolution), [this]() {
         _shadows.bind();
 
         glDrawBuffer(GL_NONE);