[fixed] alpha+bal not working

Author: Kuanlan

LuaSTG/Core/Graphics/Renderer_D3D11.cpp

@@ -599,7 +599,7 @@ namespace Core::Graphics
 				return false;
 			M_D3D_SET_DEBUG_NAME_SIMPLE(_blend_state[IDX(BlendState::RevSub)].Get());
 
-			blendt_.BlendOp = D3D11_BLEND_OP_REV_SUBTRACT;
+			blendt_.BlendOp = D3D11_BLEND_OP_ADD;
 			blendt_.SrcBlend = D3D11_BLEND_INV_DEST_COLOR;
 			blendt_.DestBlend = D3D11_BLEND_INV_SRC_COLOR;
 			blendt_.BlendOpAlpha = D3D11_BLEND_OP_ADD;

data/test/src/main.lua

@@ -100,6 +100,7 @@ require("test_dwrite")
 require("test_colli")
 require("test_posteffect")
 require("test_blend_color_burn")
+require("test_blend_alpha_bal")
 require("test_monitor")
 require("test_utf8api")
 require("test_lfs")

data/test/src/test_blend_alpha_bal.lua

@@ -0,0 +1,62 @@
+local test = require("test")
+
+---@class test.Module.PostEffect.Blend.AlphaBal : test.Base
+local M = {}
+
+local function load_image(name, path)
+    lstg.LoadTexture(name, path, false)
+    local w, h = lstg.GetTextureSize(name)
+    lstg.LoadImage(name, name, 0, 0, w, h)
+end
+
+local function unload_image(pool, name)
+    lstg.RemoveResource(pool, 2, name)
+    lstg.RemoveResource(pool, 1, name)
+end
+
+function M:onCreate()
+    local last_pool = lstg.GetResourceStatus()
+    lstg.SetResourceStatus("global")
+
+    load_image("image_2", "res/image_2.jpg")
+    lstg.CreateRenderTarget("rt:white", 256, 256, false)
+    lstg.CreateRenderTarget("rt:black", 256, 256, false)
+    lstg.LoadImage("sprite:white", "rt:white", 0, 0, 256, 256)
+    lstg.LoadImage("sprite:black", "rt:black", 0, 0, 256, 256)
+    lstg.SetImageState("sprite:white", "alpha+bal", lstg.Color(255, 255, 255, 255))
+    lstg.SetImageState("sprite:black", "alpha+bal", lstg.Color(255, 255, 255, 255))
+
+    lstg.SetResourceStatus(last_pool)
+
+    self.timer = 0
+end
+
+function M:onDestroy()
+    lstg.RemoveResource("global", 2, "sprite:white")
+    lstg.RemoveResource("global", 2, "sprite:black")
+    lstg.RemoveResource("global", 1, "rt:white")
+    lstg.RemoveResource("global", 1, "rt:black")
+    unload_image("global", "image_2")
+end
+
+function M:onUpdate()
+    self.timer = self.timer + 1
+end
+
+function M:onRender()
+    window:applyCameraV()
+
+    lstg.PushRenderTarget("rt:white")
+    lstg.RenderClear(lstg.Color(255, 255, 255, 255))
+    lstg.PopRenderTarget()
+
+    lstg.PushRenderTarget("rt:black")
+    lstg.RenderClear(lstg.Color(255, 0, 0, 0))
+    lstg.PopRenderTarget()
+
+    lstg.Render("image_2", window.width / 2, window.height / 2, 0, window.height / 2160)
+    lstg.Render("sprite:white", 256, 256)
+    lstg.Render("sprite:black", 512, 256)
+end
+
+test.registerTest("test.Module.PostEffect.Blend.AlphaBal", M)