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render3d(vulkan): MSAA - multisampled renderbuffers, resolved in a draw-less pass

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gpu_rb_storage makes the image with the samples asked for; a pass takes its attachments' count and
every pipeline in it matches; a blit from a multisampled source resolves on the end of an empty
dynamic-rendering pass (colour averaged, depth from sample zero - vkCmdResolveImage cannot do depth).
gpu_msaa_max reads the device's colour-and-depth sample limits, and post_set_msaa clamps to it, so
the Anti-aliasing setting is live on Vulkan. The pipeline cache's pass key no longer packs samples
into three bits.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 16:21:52 +03:00
parent 97d75e1d5e
commit bda53f759e
4 changed files with 74 additions and 7 deletions
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10
packages/ludic.render3d/gpu_vk_res.ludic
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@ -57,6 +57,8 @@ var gvk_tex_array: []int = null # 1 for an array image
var gvk_tex_gen: []int = null # bumped whenever the image behind a handle is replaced
var gvk_tex_smp_sig: []int = null # the sampling parameters the cached sampler was made for
var gvk_tex_smp: []long = null
var gvk_tex_samples: []int = null # 1, or the sample count of a multisampled renderbuffer
var gvk_storage_samples: int = 1 # what the next gvk_tex_storage makes: gpu_rb_storage sets it around its call
var gvk_unpack_swap: bool = false # GL_UNPACK_SWAP_BYTES: 16-bit PNG samples arrive big-endian
function gvk_tex_new() -> int {
@ -67,6 +69,7 @@ function gvk_tex_new() -> int {
gvk_tex_dims_w = new []int; gvk_tex_dims_h = new []int
gvk_tex_glfmt = new []int; gvk_tex_array = new []int; gvk_tex_gen = new []int
gvk_tex_smp_sig = new []int; gvk_tex_smp = new []long
gvk_tex_samples = new []int; push(gvk_tex_samples, 0)
push(gvk_tex_dims_w, 0); push(gvk_tex_dims_h, 0)
push(gvk_tex_glfmt, 0); push(gvk_tex_array, 0); push(gvk_tex_gen, 0)
push(gvk_tex_smp_sig, 0); push(gvk_tex_smp, zero)
@ -79,6 +82,7 @@ function gvk_tex_new() -> int {
push(gvk_tex_dims_w, 0); push(gvk_tex_dims_h, 0)
push(gvk_tex_glfmt, 0); push(gvk_tex_array, 0); push(gvk_tex_gen, 0)
push(gvk_tex_smp_sig, 0); push(gvk_tex_smp, zero)
push(gvk_tex_samples, 0)
return len(gvk_tex_image) - 1
}
@ -162,6 +166,9 @@ function gvk_tex_storage(tex: int, array: bool, ifmt: int, w: int, h: int, layer
let depth = gvk_is_depth(ifmt)
var levels = 1
if with_mips and not depth { levels = gvk_mip_levels(w, h) }
var samples = gvk_storage_samples
if samples < 1 { samples = 1 }
if samples > 1 { levels = 1 }
var usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT
if depth { usage = usage | VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT } else { usage = usage | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT }
let ici = bytes(VkImageCreateInfo_sizeof)
@ -174,7 +181,7 @@ function gvk_tex_storage(tex: int, array: bool, ifmt: int, w: int, h: int, layer
Vk.put_i32(ici, VkImageCreateInfo_extent + VkExtent3D_depth, 1)
Vk.put_i32(ici, VkImageCreateInfo_mipLevels, levels)
Vk.put_i32(ici, VkImageCreateInfo_arrayLayers, layers)
Vk.put_i32(ici, VkImageCreateInfo_samples, VK_SAMPLE_COUNT_1_BIT)
Vk.put_i32(ici, VkImageCreateInfo_samples, samples)
Vk.put_i32(ici, VkImageCreateInfo_tiling, VK_IMAGE_TILING_OPTIMAL)
Vk.put_i32(ici, VkImageCreateInfo_usage, usage)
Vk.put_i32(ici, VkImageCreateInfo_sharingMode, VK_SHARING_MODE_EXCLUSIVE)
@ -212,6 +219,7 @@ function gvk_tex_storage(tex: int, array: bool, ifmt: int, w: int, h: int, layer
gvk_tex_levels[tex] = levels; gvk_tex_layers[tex] = layers; gvk_tex_vkfmt[tex] = vkfmt
gvk_tex_dims_w[tex] = w; gvk_tex_dims_h[tex] = h
gvk_tex_glfmt[tex] = ifmt; gvk_tex_gen[tex] = gvk_tex_gen[tex] + 1
gvk_tex_samples[tex] = samples
if array { gvk_tex_array[tex] = 1 } else { gvk_tex_array[tex] = 0 }
# a target starts cleared-to-nothing but readable: every level in the layout samplers expect
let cb = gvk_once_begin()