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Merge branch 'init-blend-image' into 'master'

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render/vulkan: clear the blend image on first use

See merge request wlroots/wlroots!5396
This commit is contained in:
twilligon 2026-06-12 18:11:32 +00:00
commit e1798b5d26
3 changed files with 40 additions and 27 deletions
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1
include/render/vulkan.h
View file

@ -212,6 +212,7 @@ struct wlr_vk_render_format_setup {
bool use_blending_buffer;
bool use_srgb;
VkRenderPass render_pass;
VkRenderPass render_pass_clear;
VkPipeline output_pipe_identity;
VkPipeline output_pipe_srgb;

57
render/vulkan/pass.c
View file

@ -429,33 +429,32 @@ static bool render_pass_submit(struct wlr_render_pass *wlr_pass) {
}
if (pass->two_pass) {
// The render pass changes the blend image layout from
// color attachment to read only, so on each frame, before
// the render pass starts, we change it back
VkImageLayout blend_src_layout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
if (!render_buffer->two_pass.blend_transitioned) {
blend_src_layout = VK_IMAGE_LAYOUT_UNDEFINED;
// On the first frame the clear render pass transitions the blend
// image from undefined and we just mark it transitioned. On every
// frame after, the previous frame left it read-only, so we change
// it back to a color attachment before the render pass starts
if (render_buffer->two_pass.blend_transitioned) {
VkImageMemoryBarrier blend_acq_barrier = {
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = render_buffer->two_pass.blend_image,
.oldLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
.newLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
.srcAccessMask = VK_ACCESS_SHADER_READ_BIT,
.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
.subresourceRange = {
.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.layerCount = 1,
.levelCount = 1,
},
};
vkCmdPipelineBarrier(stage_cb->vk, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT,
VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
0, 0, NULL, 0, NULL, 1, &blend_acq_barrier);
} else {
render_buffer->two_pass.blend_transitioned = true;
}
VkImageMemoryBarrier blend_acq_barrier = {
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = render_buffer->two_pass.blend_image,
.oldLayout = blend_src_layout,
.newLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
.srcAccessMask = VK_ACCESS_SHADER_READ_BIT,
.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
.subresourceRange = {
.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.layerCount = 1,
.levelCount = 1,
},
};
vkCmdPipelineBarrier(stage_cb->vk, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT,
VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
0, 0, NULL, 0, NULL, 1, &blend_acq_barrier);
}
// acquire render buffer before rendering
@ -1334,11 +1333,15 @@ struct wlr_vk_render_pass *vulkan_begin_render_pass(struct wlr_vk_renderer *rend
int height = buffer->wlr_buffer->height;
VkRect2D rect = { .extent = { width, height } };
bool blend_first_use = pass->two_pass && !buffer->two_pass.blend_transitioned;
VkClearValue clear_value = {0};
VkRenderPassBeginInfo rp_info = {
.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
.renderArea = rect,
.clearValueCount = 0,
.renderPass = render_setup->render_pass,
.clearValueCount = blend_first_use ? 1 : 0,
.pClearValues = blend_first_use ? &clear_value : NULL,
.renderPass = blend_first_use ?
render_setup->render_pass_clear : render_setup->render_pass,
.framebuffer = buffer_out->framebuffer,
};
vkCmdBeginRenderPass(cb->vk, &rp_info, VK_SUBPASS_CONTENTS_INLINE);

9
render/vulkan/renderer.c
View file

@ -169,6 +169,7 @@ static void destroy_render_format_setup(struct wlr_vk_renderer *renderer,
VkDevice dev = renderer->dev->dev;
vkDestroyRenderPass(dev, setup->render_pass, NULL);
vkDestroyRenderPass(dev, setup->render_pass_clear, NULL);
vkDestroyPipeline(dev, setup->output_pipe_identity, NULL);
vkDestroyPipeline(dev, setup->output_pipe_srgb, NULL);
vkDestroyPipeline(dev, setup->output_pipe_pq, NULL);
@ -2585,6 +2586,14 @@ static struct wlr_vk_render_format_setup *find_or_create_render_setup(
goto error;
}
attachments[0].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachments[0].initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
res = vkCreateRenderPass(dev, &rp_info, NULL, &setup->render_pass_clear);
if (res != VK_SUCCESS) {
wlr_vk_error("Failed to create 2-step clear render pass", res);
goto error;
}
// this is only well defined if render pass has a 2nd subpass
if (!init_blend_to_output_pipeline(
renderer, setup->render_pass, renderer->output_pipe_layout,