diff --git a/tools/generate_test_textures.lua b/tools/generate_test_textures.lua
index e442769..54fb36f 100755
--- a/tools/generate_test_textures.lua
+++ b/tools/generate_test_textures.lua
@@ -66,7 +66,7 @@ local pixels_grayscale_by_scanline_order = {
 }
 
 local colormap_32bpp = {
-	{    0,   0,   0, 128 },
+	{    0,   0,   0, 127 },
 	{ 255,    0,   0, 255 },
 	{    0, 255,   0, 255 },
 	{    0,   0, 255, 255 },
@@ -131,7 +131,7 @@ for _, color_format in ipairs(
 	end
 end
 
-local _ = {    0,   0,   0, 128 }
+local _ = {    0,   0,   0, 127 }
 local R = { 255,    0,   0, 255 }
 local G = {    0, 255,   0, 255 }
 local B = {    0,   0, 255, 255 }
@@ -158,25 +158,10 @@ local pixels_rgba_tb = {
 	{ _, _, _, _, _, B, _, B, },
 }
 
-image_rgba_bt = tga_encoder.image(pixels_rgba_bt)
-image_rgba_tb = tga_encoder.image(pixels_rgba_tb)
-
-image_rgba_bt:save(
-	"type2_32bpp_bt.tga",
-	{ color_format="B8G8R8A8", compression="RAW", scanline_order = "bottom-top" }
-)
-image_rgba_tb:save(
-	"type2_32bpp_tb.tga",
-	{ color_format="B8G8R8A8", compression="RAW", scanline_order = "top-bottom" }
-)
-image_rgba_bt:save(
-	"type10_32bpp_bt.tga",
-	{ color_format="B8G8R8A8", compression="RLE", scanline_order = "bottom-top" }
-)
-image_rgba_tb:save(
-	"type10_32bpp_tb.tga",
-	{ color_format="B8G8R8A8", compression="RLE", scanline_order = "top-bottom" }
-)
+local pixels_rgba_by_scanline_order = {
+	["bottom-top"] = pixels_rgba_bt,
+	["top-bottom"] = pixels_rgba_tb,
+}
 
 local _ = {    0,   0,   0 }
 local R = { 255,    0,   0 }
@@ -205,38 +190,53 @@ local pixels_rgb_tb = {
 	{ _, _, _, _, _, B, _, B, },
 }
 
-image_rgb_bt = tga_encoder.image(pixels_rgb_bt)
-image_rgb_tb = tga_encoder.image(pixels_rgb_tb)
+local pixels_rgb_by_scanline_order = {
+	["bottom-top"] = pixels_rgb_bt,
+	["top-bottom"] = pixels_rgb_tb,
+}
 
-image_rgb_bt:save(
-	"type2_24bpp_bt.tga",
-	{ color_format="B8G8R8", compression="RAW", scanline_order = "bottom-top" }
-)
-image_rgb_tb:save(
-	"type2_24bpp_tb.tga",
-	{ color_format="B8G8R8", compression="RAW", scanline_order = "top-bottom" }
-)
-image_rgb_bt:save(
-	"type10_24bpp_bt.tga",
-	{ color_format="B8G8R8", compression="RLE", scanline_order = "bottom-top" }
-)
-image_rgb_tb:save(
-	"type10_24bpp_tb.tga",
-	{ color_format="B8G8R8", compression="RLE", scanline_order = "top-bottom" }
-)
-image_rgb_bt:save(
-	"type2_16bpp_bt.tga",
-	{ color_format="A1R5G5B5", compression="RAW", scanline_order = "bottom-top" }
-)
-image_rgb_tb:save(
-	"type2_16bpp_tb.tga",
-	{ color_format="A1R5G5B5", compression="RAW", scanline_order = "top-bottom" }
-)
-image_rgb_bt:save(
-	"type10_16bpp_bt.tga",
-	{ color_format="A1R5G5B5", compression="RLE", scanline_order = "bottom-top" }
-)
-image_rgb_tb:save(
-	"type10_16bpp_tb.tga",
-	{ color_format="A1R5G5B5", compression="RLE", scanline_order = "top-bottom" }
-)
+local tga_type_by_compression = {
+	["RAW"] = "2",
+	["RLE"] = "10",
+}
+
+local pixels_by_scanline_order_by_color_format = {
+	["A1R5G5B5"] = pixels_rgba_by_scanline_order,
+	["B8G8R8"] = pixels_rgb_by_scanline_order,
+	["B8G8R8A8"] = pixels_rgba_by_scanline_order,
+}
+
+for _, color_format in ipairs(
+	tga_encoder.features.color_format
+) do
+	for _, compression in ipairs(
+		tga_encoder.features.compression
+	) do
+		for _, scanline_order in ipairs(
+			tga_encoder.features.scanline_order
+		) do
+			if ("Y8" ~= color_format) then
+				local tga_type = tga_type_by_compression[
+					compression
+				]
+				local filename = "type" .. tga_type ..
+					'_' .. color_format ..
+					'_' .. scanline_order ..
+					'.tga'
+				local pixels = pixels_by_scanline_order_by_color_format[
+					color_format
+				][
+					scanline_order
+				]
+				local properties = {
+					color_format = color_format,
+					compression = compression,
+					scanline_order = scanline_order,
+				}
+				print(filename)
+				local image = tga_encoder.image(pixels)
+				image:save(filename, properties)
+			end
+		end
+	end
+end