Squashed 'external/parallel-rdp/parallel-rdp-standalone/' content from commit 3f59f61f2c

git-subtree-dir: external/parallel-rdp/parallel-rdp-standalone
git-subtree-split: 3f59f61f2c1c56424356003041df5e4a10612049

parallel-rdp/shaders/masked_rdram_resolve.comp

@@ -0,0 +1,70 @@
+#version 450
+/* Copyright (c) 2020 Themaister
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+layout(local_size_x_id = 0) in;
+layout(constant_id = 1) const int PAGE_STRIDE = 256;
+
+layout(set = 0, binding = 0, std430) buffer RDRAM
+{
+    uint rdram[];
+};
+
+layout(set = 0, binding = 1, std430) readonly buffer StagingRDRAM
+{
+    uint staging_rdram[];
+};
+
+layout(set = 0, binding = 2, std430) readonly buffer WriteMaskRDRAM
+{
+    uint writemask[];
+};
+
+layout(set = 1, binding = 0, std140) uniform UBO
+{
+    uvec4 offsets[1024];
+};
+
+void main()
+{
+    uint offset = offsets[gl_WorkGroupID.x >> 2u][gl_WorkGroupID.x & 3u];
+    offset *= PAGE_STRIDE;
+    offset += gl_LocalInvocationIndex;
+    uint mask = writemask[offset];
+
+    if (mask == ~0u)
+    {
+        return;
+    }
+    else if (mask == 0u)
+    {
+        uint staging = staging_rdram[offset];
+        rdram[offset] = staging;
+    }
+    else
+    {
+        uint word = rdram[offset];
+        uint staging = staging_rdram[offset];
+        word = (word & mask) | (staging & ~mask);
+        rdram[offset] = word;
+    }
+}