Add option to always use GLSL tone mapping instead of GL_FRAMEBUFFER_SRGB.

src/graphics/framebuffer.nim

@@ -340,4 +340,4 @@ proc newMainFramebuffer*(engine: MyouEngine): Framebuffer =
     result.engine = engine
     result.framebuffer = 0
     result.is_complete = true
-    result.use_sRGB = true
+    result.use_sRGB = not engine.use_glsl_tone_mapping

src/myou_engine.nim

@@ -64,6 +64,7 @@ proc newMyouEngine*(
         opengl_version = default_gl_version,
         opengl_es = default_gl_es,
         glsl_version = "",
+        use_glsl_tone_mapping = true,
     ): MyouEngine
 proc get_builtin_shader_library*(use_cubemap_prefiltering = true): string
 proc get_builtin_shader_textures*(): Table[string, Texture]
@@ -87,6 +88,7 @@ proc newMyouEngine*(
         opengl_version = default_gl_version,
         opengl_es = default_gl_es,
         glsl_version = "",
+        use_glsl_tone_mapping = true,
     ): MyouEngine =
     ## Creates a Myou Engine instance. You need to call this before you can use
     ## the engine. You also need to call `run <#run,MyouEngine>`_ at the end of
@@ -103,6 +105,10 @@ proc newMyouEngine*(
     # to override it with per-camera exposure settings
     if opengl_es:
         assert opengl_version >= 300, "Minimum supported OpenGL ES version is 3.0"
+    else:
+        assert opengl_version >= 330, "Minimum supported OpenGL version is 3.3"
+
+    if opengl_es or use_glsl_tone_mapping:
         result.tone_mapping_library = dedent """
             float linearrgb_to_srgb(float c){
                 if (c < 0.0031308) return (c < 0.0) ? 0.0 : c * 12.92;
@@ -119,8 +125,8 @@ proc newMyouEngine*(
             #define MYOU_TONE_MAP(x) linearrgb_to_srgb(x)
         """
         result.tone_mapping_function = "MYOU_TONE_MAP"
+        result.use_glsl_tone_mapping = true
     else:
-        assert opengl_version >= 330, "Minimum supported OpenGL version is 3.3"
         result.tone_mapping_library = "\n#define MYOU_TONE_MAP(x) x\n"
     
     echo "assigning renderer"

src/types.nim

@@ -81,9 +81,8 @@ type
         renderer*: RenderManager
         tone_mapping_library*: string
         tone_mapping_function*: string
+        use_glsl_tone_mapping*: bool
         loaders_by_ext*: Table[string, seq[proc(e: MyouEngine): Loader]]
-        # TODO: remove this and query it when screen is created
-        width*, height*: int
         glsl_version*: string
         all_framebuffers*: seq[Framebuffer] ## private