Renderer: Fix A8, L8 and LA8 support for both OpenGL and Vulkan

src/Nazara/OpenGLRenderer/OpenGLTexture.cpp

@@ -78,6 +78,18 @@ namespace Nz
 		auto format = DescribeTextureFormat(m_params.pixelFormat);
 		assert(format);
 
+		const GL::Context& context = m_texture.EnsureDeviceContext();
+
+		UInt8 bpp = PixelFormatInfo::GetBytesPerPixel(m_params.pixelFormat);
+		if (bpp % 8 == 0)
+			context.glPixelStorei(GL_UNPACK_ALIGNMENT, 8);
+		else if (bpp % 4 == 0)
+			context.glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+		else if (bpp % 2 == 0)
+			context.glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
+		else
+			context.glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
 		switch (m_params.type)
 		{
 			case ImageType::E1D:

src/Nazara/VulkanRenderer/VulkanTexture.cpp

@@ -249,6 +249,19 @@ namespace Nz
 		// TODO: Fill this switch
 		switch (pixelFormat)
 		{
+			case PixelFormat::A8:
+			{
+				createImage.format = VK_FORMAT_R8_UNORM;
+				createImageView.format = createImage.format;
+				createImageView.components = {
+					VK_COMPONENT_SWIZZLE_ONE,
+					VK_COMPONENT_SWIZZLE_ONE,
+					VK_COMPONENT_SWIZZLE_ONE,
+					VK_COMPONENT_SWIZZLE_R
+				};
+				break;
+			}
+
 			case PixelFormat::BGR8:
 			case PixelFormat::BGR8_SRGB:
 			case PixelFormat::BGRA8: