From 8286ddda96a5f2925d342d0ce115aa00ae5d94ec Mon Sep 17 00:00:00 2001
From: LaG1924 <lag1924@gmail.com>
Date: Sun, 28 Nov 2021 16:16:29 +0500
Subject: Added gamma correction

---
 src/GalOgl.cpp | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

(limited to 'src/GalOgl.cpp')

diff --git a/src/GalOgl.cpp b/src/GalOgl.cpp
index 961c6ef..ff43ed8 100644
--- a/src/GalOgl.cpp
+++ b/src/GalOgl.cpp
@@ -321,7 +321,7 @@ size_t GalFormatGetSize(Format format) {
     return 0;
 }
 
-GLenum GalFormatGetGlInternalFormat(Format format) {
+GLenum GalFormatGetGlLinearInternalFormat(Format format) {
     switch (format) {
     case Format::D24S8:
         return GL_DEPTH24_STENCIL8;
@@ -335,6 +335,20 @@ GLenum GalFormatGetGlInternalFormat(Format format) {
     return 0;
 }
 
+GLenum GalFormatGetGlInternalFormat(Format format) {
+    switch (format) {
+    case Format::D24S8:
+        return GL_DEPTH24_STENCIL8;
+    case Format::R8G8B8:
+        return GL_SRGB;
+    case Format::R8G8B8A8:
+        return GL_SRGB_ALPHA;
+    default:
+        return 0;
+    }
+    return 0;
+}
+
 GLenum GalFormatGetGlFormat(Format format) {
     switch (format) {
     case Format::D24S8:
@@ -580,6 +594,7 @@ struct TextureConfigOgl : public TextureConfig {
     Format format;
     size_t width = 1, height = 1, depth = 1;
     bool interpolateLayers = false;
+    bool linear = true;
     GLenum type;
 
     Filtering min = Filtering::Nearest, max = Filtering::Nearest;
@@ -597,6 +612,10 @@ struct TextureConfigOgl : public TextureConfig {
         wrap = wrapping;
     }
 
+    virtual void SetLinear(bool isLinear) override {
+        linear = isLinear;
+    }
+
 };
 
 struct TextureOgl : public Texture {
@@ -605,12 +624,15 @@ struct TextureOgl : public Texture {
     GlResource texture;
     Format format;
     size_t width, height, depth;
+    bool linear;
 
     virtual void SetData(std::vector<std::byte>&& data, size_t mipLevel = 0) override {
         size_t expectedSize = width * height * depth * GalFormatGetSize(format);
         if (data.size() != expectedSize && !data.empty())
             throw std::logic_error("Size of data is not valid for this texture");
 
+        GLenum internalFormat = linear ? GalFormatGetGlLinearInternalFormat(format) : GalFormatGetGlInternalFormat(format);
+
         oglState.BindTexture(type, texture);
 
         switch (type) {
@@ -630,13 +652,13 @@ struct TextureOgl : public Texture {
         case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
         case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
         case GL_PROXY_TEXTURE_CUBE_MAP:
-            glTexImage2D(type, mipLevel, GalFormatGetGlInternalFormat(format), width, height, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
+            glTexImage2D(type, mipLevel, internalFormat, width, height, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
             break;
         case GL_TEXTURE_3D:
         case GL_PROXY_TEXTURE_3D:
         case GL_TEXTURE_2D_ARRAY:
         case GL_PROXY_TEXTURE_2D_ARRAY:
-            glTexImage3D(type, mipLevel, GalFormatGetGlInternalFormat(format), width, height, depth, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
+            glTexImage3D(type, mipLevel, internalFormat, width, height, depth, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
             break;
         default:
             throw std::runtime_error("Unknown texture type");
@@ -1136,6 +1158,7 @@ struct ImplOgl : public Impl {
         texture->width = texConfig->width;
         texture->height = texConfig->height;
         texture->depth = texConfig->depth;
+        texture->linear = texConfig->linear;
 
         GLuint newTex;
         glGenTextures(1, &newTex);
-- 
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