void change_image_layout(VkCommandBuffer cmd, vk::image *image, VkImageLayout new_layout)
{
if (image->current_layout == new_layout) return;
change_image_layout(cmd, image->value, image->current_layout, new_layout, { image->aspect(), 0, 1, 0, 1 });
image->current_layout = new_layout;
}
void change_image_layout(VkCommandBuffer cmd, vk::image *image, VkImageLayout new_layout, const VkImageSubresourceRange& range)
{
if (image->current_layout == new_layout) return;
change_image_layout(cmd, image->value, image->current_layout, new_layout, range);
image->current_layout = new_layout;
}
void change_image_layout(VkCommandBuffer cmd, vk::image *image, VkImageLayout new_layout)
{
if (image->current_layout == new_layout) return;
VkImageAspectFlags flags = get_aspect_flags(image->info.format);
change_image_layout(cmd, image->value, image->current_layout, new_layout, { flags, 0, 1, 0, 1 });
image->current_layout = new_layout;
}
vk::image_view* null_image_view(vk::command_buffer &cmd)
{
if (g_null_image_view)
return g_null_image_view.get();
g_null_texture.reset(new image(*g_current_renderer, g_current_renderer->get_memory_mapping().device_local, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
VK_IMAGE_TYPE_2D, VK_FORMAT_B8G8R8A8_UNORM, 4, 4, 1, 1, 1, VK_SAMPLE_COUNT_1_BIT, VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_TILING_OPTIMAL, VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT, 0));
g_null_image_view.reset(new image_view(*g_current_renderer, g_null_texture.get()));
// Initialize memory to transparent black
VkClearColorValue clear_color = {};
VkImageSubresourceRange range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
change_image_layout(cmd, g_null_texture.get(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, range);
vkCmdClearColorImage(cmd, g_null_texture->value, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &clear_color, 1, &range);
// Prep for shader access
change_image_layout(cmd, g_null_texture.get(), VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, range);
return g_null_image_view.get();
}
