From 36aa55fb8470a91d730570e60327e13292c96cb4 Mon Sep 17 00:00:00 2001
From: Sasha Szpakowski <slime73@gmail.com>
Date: Thu, 21 Mar 2024 22:10:24 -0300
Subject: [PATCH] tests: add graphics tests for y direction in canvases

---
 .../expected/love.test.graphics.Canvas-3.png  | Bin 0 -> 327 bytes
 .../expected/love.test.graphics.Canvas-4.png  | Bin 0 -> 327 bytes
 testing/tests/graphics.lua                    |  30 ++++++++++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 testing/output/expected/love.test.graphics.Canvas-3.png
 create mode 100644 testing/output/expected/love.test.graphics.Canvas-4.png

diff --git a/testing/output/expected/love.test.graphics.Canvas-3.png b/testing/output/expected/love.test.graphics.Canvas-3.png
new file mode 100644
index 0000000000000000000000000000000000000000..d3e9c37f8bc3899bba97bfaff675fbbb0688b8f6
GIT binary patch
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literal 0
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diff --git a/testing/output/expected/love.test.graphics.Canvas-4.png b/testing/output/expected/love.test.graphics.Canvas-4.png
new file mode 100644
index 0000000000000000000000000000000000000000..d3e9c37f8bc3899bba97bfaff675fbbb0688b8f6
GIT binary patch
literal 327
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z-}57TSbTFXtkIH)n0EKU#rkuW-wd}E?%m#h{`=?kb${Qs*Y7*mUVhC|>b-_`K-hvc
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SrzHRbh{4m<&t;ucLK6USId^;j

literal 0
HcmV?d00001

diff --git a/testing/tests/graphics.lua b/testing/tests/graphics.lua
index b8e9e8185..2ad615835 100644
--- a/testing/tests/graphics.lua
+++ b/testing/tests/graphics.lua
@@ -201,6 +201,36 @@ love.test.graphics.Canvas = function(test)
   local imgdata2 = love.graphics.readbackTexture(canvas)
   test:compareImg(imgdata2)
 
+  -- check y-down
+  local shader1 = love.graphics.newShader[[
+    vec4 effect(vec4 c, Image tex, vec2 tc, vec2 pc) {
+      return vec4(tc, 0.0, 1.0);
+    }
+  ]]
+  local shader2 = love.graphics.newShader[[
+    vec4 effect(vec4 c, Image tex, vec2 tc, vec2 pc) {
+      return vec4(pc / love_ScreenSize.xy, 0.0, 1.0);
+    }
+  ]]
+  local img = love.graphics.newImage(love.image.newImageData(1, 1))
+
+  love.graphics.push("all")
+    love.graphics.setCanvas(canvas)
+    love.graphics.setShader(shader1)
+    love.graphics.draw(img, 0, 0, 0, canvas:getDimensions())
+  love.graphics.pop()
+  local imgdata3 = love.graphics.readbackTexture(canvas)
+  test:compareImg(imgdata3)
+
+  love.graphics.push("all")
+    love.graphics.setCanvas(canvas)
+    love.graphics.setShader(shader2)
+    love.graphics.draw(img, 0, 0, 0, canvas:getDimensions())
+  love.graphics.pop()
+  local imgdata4 = love.graphics.readbackTexture(canvas)
+  test:compareImg(imgdata4)
+
+
   -- check depth samples
   local dcanvas = love.graphics.newCanvas(100, 100, {
     type = '2d',