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Code Issues 1 Projects Releases Wiki Activity

vkfullscreenquad: add support for disabling clearing

Browse source 
e.g. if drawing over the top of an existing image, we don'w want to
clear.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2470>
This commit is contained in:
Matthew Waters 2022-05-23 11:26:24 +10:00 committed by GStreamer Marge Bot
parent fe8b4514e9
commit efe8e41b61
2 changed files with 32 additions and 1 deletions
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30
subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkfullscreenquad.c
View file

@ -65,6 +65,8 @@ struct _GstVulkanFullScreenQuadPrivate
VkBlendFactor dst_alpha_blend_factor;
VkBlendOp colour_blend_op;
VkBlendOp alpha_blend_op;
gboolean enable_clear;
};
G_DEFINE_TYPE_WITH_CODE (GstVulkanFullScreenQuad, gst_vulkan_full_screen_quad,
@ -300,7 +302,7 @@ create_render_pass (GstVulkanFullScreenQuad * self, GError ** error)
color_attachments[i] = (VkAttachmentDescription) {
.format = gst_vulkan_format_from_video_info (&self->out_info, i),
.samples = VK_SAMPLE_COUNT_1_BIT,
.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR,
.loadOp = priv->enable_clear ? VK_ATTACHMENT_LOAD_OP_CLEAR : VK_ATTACHMENT_LOAD_OP_LOAD,
.storeOp = VK_ATTACHMENT_STORE_OP_STORE,
.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE,
.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE,
@ -1326,6 +1328,32 @@ gst_vulkan_full_screen_quad_set_blend_operation (GstVulkanFullScreenQuad * self,
clear_graphics_pipeline (self);
}
/**
* gst_vulkan_full_screen_quad_enable_clear:
* @self: the #GstVulkanFullScreenQuad
* @enable_clear: whether to clear the framebuffer on load
*
* Since: 1.22
*/
void
gst_vulkan_full_screen_quad_enable_clear (GstVulkanFullScreenQuad * self,
gboolean enable_clear)
{
GstVulkanFullScreenQuadPrivate *priv;
g_return_if_fail (GST_IS_VULKAN_FULL_SCREEN_QUAD (self));
priv = GET_PRIV (self);
if (priv->enable_clear == enable_clear)
return;
priv->enable_clear = enable_clear;
clear_graphics_pipeline (self);
clear_render_pass (self);
}
/**
* gst_vulkan_full_screen_quad_prepare_draw:
* @self: the #GstVulkanFullScreenQuad

3
subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkfullscreenquad.h
View file

@ -132,6 +132,9 @@ void gst_vulkan_full_screen_quad_set_blend_factors (GstVulkanFu
VkBlendFactor dst_blend_factor,
VkBlendFactor src_alpha_blend_factor,
VkBlendFactor dst_alpha_blend_factor);
GST_VULKAN_API
void gst_vulkan_full_screen_quad_enable_clear (GstVulkanFullScreenQuad * self,
gboolean enable_clear);
GST_VULKAN_API
gboolean gst_vulkan_full_screen_quad_prepare_draw (GstVulkanFullScreenQuad * self, GstVulkanFence * fence, GError ** error);