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[dxvk] Use vkCmdUpdateBuffer to clear tiny buffers

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While this might consume a few more CPU cycles, UpdateBuffer may
be cheaper on the GPU for very small buffers, so we should use
it instead.

Also seems to fix rendering issues in Far Cry Primal for unknown reasons.
This commit is contained in:
Philip Rebohle 2019-02-09 22:21:57 +01:00
parent 8543f96413
commit 311661e404
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GPG Key ID: C8CC613427A31C99
1 changed files with 21 additions and 8 deletions
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29
src/dxvk/dxvk_context.cpp
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@ -260,19 +260,32 @@ namespace dxvk {
uint32_t value) {
this->spillRenderPass();
if (length == buffer->info().size)
length = align(length, 4);
length = align(length, sizeof(uint32_t));
auto slice = buffer->getSliceHandle(offset, length);
if (m_barriers.isBufferDirty(slice, DxvkAccess::Write))
m_barriers.recordCommands(m_cmd);
m_cmd->cmdFillBuffer(
slice.handle,
slice.offset,
slice.length,
value);
constexpr VkDeviceSize updateThreshold = 256;
if (length <= updateThreshold * sizeof(uint32_t)) {
std::array<uint32_t, updateThreshold> data;
for (uint32_t i = 0; i < length / sizeof(uint32_t); i++)
data[i] = value;
m_cmd->cmdUpdateBuffer(
slice.handle,
slice.offset,
slice.length,
data.data());
} else {
m_cmd->cmdFillBuffer(
slice.handle,
slice.offset,
slice.length,
value);
}
m_barriers.accessBuffer(slice,
VK_PIPELINE_STAGE_TRANSFER_BIT,