From 6002a03761e123b6204394722f078e6a1535d64f Mon Sep 17 00:00:00 2001
From: Sasha Szpakowski <slime73@gmail.com>
Date: Thu, 21 Mar 2024 18:12:44 -0300
Subject: [PATCH] tests: add a test to make sure the front face is correct

---
 ...ove.test.graphics.setFrontFaceWinding-1.png | Bin 0 -> 84 bytes
 testing/tests/graphics.lua                     |  17 +++++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 testing/output/expected/love.test.graphics.setFrontFaceWinding-1.png

diff --git a/testing/output/expected/love.test.graphics.setFrontFaceWinding-1.png b/testing/output/expected/love.test.graphics.setFrontFaceWinding-1.png
new file mode 100644
index 0000000000000000000000000000000000000000..acc6f693255144e16ce567085660a80f5dc8180b
GIT binary patch
literal 84
zcmeAS@N?(olHy`uVBq!ia0vp^0wB!D3?x-;bCrM;bAV5XE5m;VlehybfLtC=7srr_
dImrnMyg;4-1EW~ytcySvgQu&X%Q~loCICv#5Q6{!

literal 0
HcmV?d00001

diff --git a/testing/tests/graphics.lua b/testing/tests/graphics.lua
index b55764444..b8e9e8185 100644
--- a/testing/tests/graphics.lua
+++ b/testing/tests/graphics.lua
@@ -2123,6 +2123,23 @@ love.test.graphics.setFrontFaceWinding = function(test)
   test:assertEquals('ccw', love.graphics.getFrontFaceWinding(), 'check ffw ccw set')
   love.graphics.setFrontFaceWinding(original)
   -- @TODO better graphics drawing specific test
+
+  local shader = love.graphics.newShader[[
+vec4 effect(vec4 c, Image tex, vec2 tc, vec2 pc) {
+  return gl_FrontFacing ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0); 
+}
+  ]]
+  local dummyimg = love.graphics.newImage(love.image.newImageData(1, 1))
+
+  local canvas = love.graphics.newCanvas(16, 16)
+  love.graphics.push("all")
+    love.graphics.setCanvas(canvas)
+    love.graphics.setShader(shader)
+    love.graphics.draw(dummyimg, 0, 0, 0, 16, 16)
+  love.graphics.pop()
+
+  local imgdata = love.graphics.readbackTexture(canvas)
+  test:compareImg(imgdata)
 end