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vulkan: Add format fallback

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When a GdkMemoryFormat isn't supported, pick close formats that have a
higher chance of being supported.
Make sure this works recursively and the whole loop always ends up at
R8G8B8A8_UNORM because that one is mandatory.

Roughly, follow these rules:
1. Drop the unpremultiplied
2. Expand channels to include all of RGBA
3. pick swizzle that is RGBA
4. pick next largest depth
5. pick R8G8B8A8_UNORM
This commit is contained in:
Benjamin Otte 2023-06-15 23:13:31 +02:00
parent ba28971a18
commit d61737ac7a
1 changed files with 74 additions and 14 deletions
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78
gsk/vulkan/gskvulkanimage.c
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@ -207,11 +207,6 @@ struct _GskMemoryFormatInfo
VkComponentMapping components;
};
static const GskMemoryFormatInfo default_format_info = {
VK_FORMAT_B8G8R8A8_UNORM,
{ VK_COMPONENT_SWIZZLE_R, VK_COMPONENT_SWIZZLE_G, VK_COMPONENT_SWIZZLE_B, VK_COMPONENT_SWIZZLE_A }
};
static const GskMemoryFormatInfo *
gsk_memory_format_get_vk_format_infos (GdkMemoryFormat format)
{
@ -426,6 +421,70 @@ gsk_memory_format_get_vk_format_infos (GdkMemoryFormat format)
#undef SWIZZLE
}
static GdkMemoryFormat
gsk_memory_format_get_fallback (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_B8G8R8A8:
return GDK_MEMORY_B8G8R8A8_PREMULTIPLIED;
case GDK_MEMORY_A8R8G8B8:
return GDK_MEMORY_A8R8G8B8_PREMULTIPLIED;
case GDK_MEMORY_R8G8B8A8:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_A8B8G8R8:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_R8G8B8:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_B8G8R8:
return GDK_MEMORY_R8G8B8;
case GDK_MEMORY_R16G16B16:
return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_R16G16B16A16:
return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;
case GDK_MEMORY_R16G16B16_FLOAT:
return GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_R16G16B16A16_FLOAT:
return GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_R32G32B32_FLOAT:
return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_R32G32B32A32_FLOAT:
return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;
case GDK_MEMORY_G8A8_PREMULTIPLIED:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_G8A8:
return GDK_MEMORY_G8A8_PREMULTIPLIED;
case GDK_MEMORY_G8:
return GDK_MEMORY_R8G8B8;
case GDK_MEMORY_G16A16_PREMULTIPLIED:
return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;
case GDK_MEMORY_G16A16:
return GDK_MEMORY_G16A16_PREMULTIPLIED;
case GDK_MEMORY_G16:
return GDK_MEMORY_R16G16B16;
case GDK_MEMORY_A8:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
case GDK_MEMORY_A16:
return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;
case GDK_MEMORY_N_FORMATS:
default:
return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
}
}
static gboolean
gsk_vulkan_context_supports_format (GdkVulkanContext *context,
VkFormat format)
@ -483,6 +542,8 @@ gsk_vulkan_image_new (GdkVulkanContext *context,
g_assert (width > 0 && height > 0);
while (TRUE)
{
for (vk_format = gsk_memory_format_get_vk_format_infos (format);
vk_format->format != VK_FORMAT_UNDEFINED;
vk_format++)
@ -490,11 +551,10 @@ gsk_vulkan_image_new (GdkVulkanContext *context,
if (gsk_vulkan_context_supports_format (context, vk_format->format))
break;
}
if (vk_format->format != VK_FORMAT_UNDEFINED)
break;
if (vk_format->format == VK_FORMAT_UNDEFINED)
{
vk_format = &default_format_info;
format = GDK_MEMORY_DEFAULT;
format = gsk_memory_format_get_fallback (format);
}
self = g_object_new (GSK_TYPE_VULKAN_IMAGE, NULL);