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metal: implement depth/stencil state

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This commit is contained in:
Alex Szpakowski
2020-06-14 21:14:56 -03:00
parent 9d2dca5740
commit 9aa9319eb5
9 changed files with 121 additions and 70 deletions
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src/modules/graphics/metal/Graphics.mm
+85 -29
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@@ -95,6 +95,23 @@ static MTLCompareFunction getMTLCompareFunction(CompareMode mode)
return MTLCompareFunctionNever;
}
static MTLStencilOperation getMTLStencilOperation(StencilAction action)
{
switch (action)
{
case STENCIL_KEEP: return MTLStencilOperationKeep;
case STENCIL_ZERO: return MTLStencilOperationZero;
case STENCIL_REPLACE: return MTLStencilOperationReplace;
case STENCIL_INCREMENT: return MTLStencilOperationIncrementClamp;
case STENCIL_DECREMENT: return MTLStencilOperationDecrementClamp;
case STENCIL_INCREMENT_WRAP: return MTLStencilOperationIncrementWrap;
case STENCIL_DECREMENT_WRAP: return MTLStencilOperationDecrementWrap;
case STENCIL_INVERT: return MTLStencilOperationInvert;
case STENCIL_MAX_ENUM: return MTLStencilOperationKeep;
}
return MTLStencilOperationKeep;
}
love::graphics::Graphics *createInstance()
{
love::graphics::Graphics *instance = nullptr;
@@ -192,6 +209,9 @@ Graphics::~Graphics()
for (auto &kvp : cachedSamplers)
CFBridgingRelease(kvp.second);
for (auto &kvp : cachedDepthStencilStates)
CFBridgingRelease(kvp.second);
graphicsInstance = nullptr;
}}
@@ -433,29 +453,38 @@ id<MTLSamplerState> Graphics::getCachedSampler(const SamplerState &s)
id<MTLDepthStencilState> Graphics::getCachedDepthStencilState(const DepthState &depth, const StencilState &stencil)
{
id<MTLDepthStencilState> state = nil;
uint64 key = (depth.compare << 0) | ((uint32)depth.write << 8)
| (stencil.action << 16) | (stencil.compare << 24)
| ((uint64)std::max(0, std::min(255, stencil.value)) << 32)
| ((uint64)std::min(255u, stencil.readMask) << 40)
| ((uint64)std::min(255u, stencil.writeMask) << 48);
{
MTLStencilDescriptor *stencildesc = [MTLStencilDescriptor new];
auto it = cachedDepthStencilStates.find(key);
if (it != cachedDepthStencilStates.end())
return (__bridge id<MTLDepthStencilState>) it->second;
stencildesc.stencilCompareFunction = getMTLCompareFunction(stencil.compare);
stencildesc.stencilFailureOperation = MTLStencilOperationKeep;
stencildesc.depthFailureOperation = MTLStencilOperationKeep;
stencildesc.depthStencilPassOperation = MTLStencilOperationKeep; // TODO
stencildesc.readMask = stencil.readMask;
stencildesc.writeMask = stencil.writeMask;
MTLStencilDescriptor *stencildesc = [MTLStencilDescriptor new];
MTLDepthStencilDescriptor *desc = [MTLDepthStencilDescriptor new];
stencildesc.stencilCompareFunction = getMTLCompareFunction(stencil.compare);
stencildesc.stencilFailureOperation = MTLStencilOperationKeep;
stencildesc.depthFailureOperation = MTLStencilOperationKeep;
stencildesc.depthStencilPassOperation = getMTLStencilOperation(stencil.action);
stencildesc.readMask = stencil.readMask;
stencildesc.writeMask = stencil.writeMask;
desc.depthCompareFunction = getMTLCompareFunction(depth.compare);
desc.depthWriteEnabled = depth.write;
desc.frontFaceStencil = stencildesc;
desc.backFaceStencil = stencildesc;
MTLDepthStencilDescriptor *desc = [MTLDepthStencilDescriptor new];
state = [device newDepthStencilStateWithDescriptor:desc];
}
desc.depthCompareFunction = getMTLCompareFunction(depth.compare);
desc.depthWriteEnabled = depth.write;
desc.frontFaceStencil = stencildesc;
desc.backFaceStencil = stencildesc;
return state;
id<MTLDepthStencilState> mtlstate = [device newDepthStencilStateWithDescriptor:desc];
if (mtlstate != nil)
cachedDepthStencilStates[key] = (void *) CFBridgingRetain(mtlstate);
return mtlstate;
}
void Graphics::applyRenderState(id<MTLRenderCommandEncoder> encoder, const vertex::Attributes &attributes)
@@ -559,7 +588,22 @@ void Graphics::applyRenderState(id<MTLRenderCommandEncoder> encoder, const verte
if (dirtyState & (STATEBIT_DEPTH | STATEBIT_STENCIL))
{
// id<MTLDepthStencilState> dsstate = getCachedDepthStencilState(<#const DepthState &depth#>, <#const StencilState &stencil#>)
DepthState depth;
depth.compare = state.depthTest;
depth.write = state.depthWrite;
StencilState stencil = state.stencil;
if (stencil.action != STENCIL_KEEP)
{
// FIXME
stencil.compare = COMPARE_ALWAYS;
}
id<MTLDepthStencilState> mtlstate = getCachedDepthStencilState(depth, stencil);
[encoder setDepthStencilState:mtlstate];
[encoder setStencilReferenceValue:state.stencil.value];
}
dirtyRenderState = 0;
@@ -888,8 +932,8 @@ void Graphics::clear(OptionalColorf c, OptionalInt stencil, OptionalDouble depth
auto color = MTLClearColorMake(c.value.r, c.value.g, c.value.b, c.value.a);
for (int i = 0; i < MAX_COLOR_RENDER_TARGETS; i++)
{
passDesc.colorAttachments[0].clearColor = color;
passDesc.colorAttachments[0].loadAction = MTLLoadActionClear;
passDesc.colorAttachments[i].clearColor = color;
passDesc.colorAttachments[i].loadAction = MTLLoadActionClear;
}
}
@@ -1098,7 +1142,8 @@ void Graphics::setScissor()
void Graphics::drawToStencilBuffer(StencilAction action, int value)
{
const auto &rts = states.back().renderTargets;
DisplayState &state = states.back();
const auto &rts = state.renderTargets;
love::graphics::Texture *dstexture = rts.depthStencil.texture.get();
if (!isRenderTargetActive() && !windowHasStencil)
@@ -1108,7 +1153,8 @@ void Graphics::drawToStencilBuffer(StencilAction action, int value)
flushBatchedDraws();
writingToStencil = true;
state.stencil.action = action;
state.stencil.value = value;
dirtyRenderState |= STATEBIT_STENCIL;
// TODO
@@ -1116,20 +1162,20 @@ void Graphics::drawToStencilBuffer(StencilAction action, int value)
void Graphics::stopDrawToStencilBuffer()
{
if (!writingToStencil)
DisplayState &state = states.back();
if (state.stencil.action == STENCIL_KEEP)
return;
flushBatchedDraws();
writingToStencil = false;
const DisplayState &state = states.back();
state.stencil.action = STENCIL_KEEP;
// Revert the color write mask.
setColorMask(state.colorMask);
// Use the user-set stencil test state when writes are disabled.
setStencilTest(state.stencilCompare, state.stencilTestValue);
setStencilTest(state.stencil.compare, state.stencil.value);
dirtyRenderState |= STATEBIT_STENCIL;
}
@@ -1146,12 +1192,22 @@ void Graphics::setDepthMode(CompareMode compare, bool write)
void Graphics::setFrontFaceWinding(vertex::Winding winding)
{
// TODO
if (states.back().winding != winding)
{
flushBatchedDraws();
states.back().winding = winding;
dirtyRenderState |= STATEBIT_FACEWINDING;
}
}
void Graphics::setColorMask(ColorChannelMask mask)
{
// TODO
if (states.back().colorMask != mask)
{
flushBatchedDraws();
states.back().colorMask = mask;
dirtyRenderState |= STATEBIT_COLORMASK;
}
}
void Graphics::setBlendState(const BlendState &blend)