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Metal: Implement push constants

This commit is contained in:
Corentin Wallez 2017-07-27 18:44:56 -04:00 committed by Corentin Wallez
parent 30beb65a7b
commit 4122b2e3f9
1 changed files with 46 additions and 2 deletions
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48
src/backend/metal/CommandBufferMTL.mm
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@ -149,6 +149,8 @@ namespace metal {
CurrentEncoders encoders;
encoders.device = device;
PerStage<std::array<uint32_t, kMaxPushConstants>> pushConstants;
uint32_t currentSubpass = 0;
while (commands.NextCommandId(&type)) {
switch (type) {
@ -156,6 +158,11 @@ namespace metal {
{
commands.NextCommand<BeginComputePassCmd>();
encoders.BeginCompute(commandBuffer);
pushConstants[nxt::ShaderStage::Compute].fill(0);
[encoders.compute setBytes: &pushConstants[nxt::ShaderStage::Compute]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
}
break;
@ -173,6 +180,16 @@ namespace metal {
{
commands.NextCommand<BeginRenderSubpassCmd>();
encoders.BeginSubpass(commandBuffer, currentSubpass);
pushConstants[nxt::ShaderStage::Vertex].fill(0);
pushConstants[nxt::ShaderStage::Fragment].fill(0);
[encoders.render setVertexBytes: &pushConstants[nxt::ShaderStage::Vertex]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
[encoders.render setFragmentBytes: &pushConstants[nxt::ShaderStage::Fragment]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
}
break;
@ -343,8 +360,35 @@ namespace metal {
case Command::SetPushConstants:
{
SetPushConstantsCmd* cmd = commands.NextCommand<SetPushConstantsCmd>();
commands.NextData<uint32_t>(cmd->count);
// TODO(kainino@chromium.org): implement SetPushConstants
uint32_t* values = commands.NextData<uint32_t>(cmd->count);
for (auto stage : IterateStages(cmd->stages)) {
memcpy(&pushConstants[stage][cmd->offset], values, cmd->count * sizeof(uint32_t));
switch (stage) {
case nxt::ShaderStage::Compute:
ASSERT(encoders.compute);
[encoders.compute setBytes: &pushConstants[nxt::ShaderStage::Compute]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
break;
case nxt::ShaderStage::Fragment:
ASSERT(encoders.render);
[encoders.render setFragmentBytes: &pushConstants[nxt::ShaderStage::Fragment]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
break;
case nxt::ShaderStage::Vertex:
ASSERT(encoders.render);
[encoders.render setVertexBytes: &pushConstants[nxt::ShaderStage::Vertex]
length: sizeof(uint32_t) * kMaxPushConstants
atIndex: 0];
break;
default:
UNREACHABLE();
break;
}
}
}
break;