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d3d11videosink: Use premultiplied-alpha swapchain

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Don't ignore alpha component if it's present

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5242>
This commit is contained in:
Seungha Yang 2023-08-25 01:40:08 +09:00 committed by GStreamer Marge Bot
parent de07c44183
commit ff435c80a2
3 changed files with 15 additions and 12 deletions
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20
subprojects/gst-plugins-bad/sys/d3d11/gstd3d11overlaycompositor.cpp
View file

@ -71,14 +71,12 @@ static const gchar templ_premul_pixel_shader[] =
"float4 main(PS_INPUT input): SV_TARGET\n"
"{\n"
" float4 sample = shaderTexture.Sample(samplerState, input.Texture);\n"
" float4 unpremul_sample;\n"
" if (sample.a == 0 || sample.a == 1)\n"
" return sample;\n"
" unpremul_sample.r = saturate (sample.r / sample.a);\n"
" unpremul_sample.g = saturate (sample.g / sample.a);\n"
" unpremul_sample.b = saturate (sample.b / sample.a);\n"
" unpremul_sample.a = sample.a;\n"
" return unpremul_sample;\n"
" float4 premul_sample;\n"
" premul_sample.r = saturate (sample.r * sample.a);\n"
" premul_sample.g = saturate (sample.g * sample.a);\n"
" premul_sample.b = saturate (sample.b * sample.a);\n"
" premul_sample.a = sample.a;\n"
" return premul_sample;\n"
"}\n";
static const gchar templ_vertex_shader[] =
@ -459,11 +457,11 @@ gst_d3d11_overlay_compositor_setup_shader (GstD3D11OverlayCompositor * self)
blend_desc.AlphaToCoverageEnable = FALSE;
blend_desc.IndependentBlendEnable = FALSE;
blend_desc.RenderTarget[0].BlendEnable = TRUE;
blend_desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
blend_desc.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
blend_desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
blend_desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blend_desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
blend_desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
blend_desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
blend_desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blend_desc.RenderTarget[0].RenderTargetWriteMask =
D3D11_COLOR_WRITE_ENABLE_ALL;
@ -710,7 +708,7 @@ gst_d3d11_overlay_compositor_draw_unlocked (GstD3D11OverlayCompositor *
gst_memory_map (mem, &info, (GstMapFlags) (GST_MAP_D3D11 | GST_MAP_READ));
}
if (overlay->premul_alpha)
if (!overlay->premul_alpha)
context->PSSetShader (priv->premul_ps.Get (), nullptr, 0);
else
context->PSSetShader (priv->ps.Get (), nullptr, 0);

5
subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window.cpp
View file

@ -765,6 +765,11 @@ gst_d3d11_window_prepare_default (GstD3D11Window * window, guint display_width,
return GST_FLOW_ERROR;
}
if (GST_VIDEO_INFO_HAS_ALPHA (&window->info)) {
g_object_set (window->converter, "dest-alpha-mode",
GST_D3D11_CONVERTER_ALPHA_MODE_PREMULTIPLIED, nullptr);
}
if (have_hdr10_meta) {
g_object_set (window->converter, "src-mastering-display-info", mdcv_str,
"src-content-light-level", cll_str, nullptr);

2
subprojects/gst-plugins-bad/sys/d3d11/gstd3d11window_win32.cpp
View file

@ -1104,7 +1104,7 @@ gst_d3d11_window_win32_create_swap_chain (GstD3D11Window * window,
if (gst_d3d11_is_windows_8_or_greater ())
desc1.Scaling = DXGI_SCALING_NONE;
desc1.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
desc1.AlphaMode = DXGI_ALPHA_MODE_UNSPECIFIED;
desc1.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED;
desc1.Flags = swapchain_flags;
new_swapchain = create_swap_chain_for_hwnd (self, device,