| /* |
| * Copyright 2025 Rive |
| */ |
| |
| #ifdef @FRAGMENT |
| |
| PLS_BLOCK_BEGIN |
| #ifndef @FIXED_FUNCTION_COLOR_OUTPUT |
| PLS_DECL4F(COLOR_PLANE_IDX, colorBuffer); |
| #endif |
| PLS_DECLUI(CLIP_PLANE_IDX, clipBuffer); |
| #ifndef @FIXED_FUNCTION_COLOR_OUTPUT |
| PLS_DECL4F(SCRATCH_COLOR_PLANE_IDX, scratchColorBuffer); |
| #endif |
| PLS_DECLUI(COVERAGE_PLANE_IDX, coverageBuffer); |
| PLS_BLOCK_END |
| |
| PLS_MAIN(@drawFragmentMain) |
| { |
| VARYING_UNPACK(v_clipIDs, half2); |
| half clipID = -v_clipIDs.x; |
| |
| #ifdef @DRAW_INTERIOR_TRIANGLES |
| VARYING_INIT(v_windingWeight, half); |
| half fragCoverage = v_windingWeight; |
| #else |
| VARYING_INIT(v_coverages, COVERAGE_TYPE); |
| half fragCoverage = v_coverages.x; |
| #endif //@DRAW_INTERIOR_TRIANGLES |
| |
| PLS_INTERLOCK_BEGIN; |
| |
| half2 clipData; |
| half clipBufferID, clipCoverage; |
| #if defined(@DRAW_INTERIOR_TRIANGLES) && defined(@BORROWED_COVERAGE_PASS) |
| if (@BORROWED_COVERAGE_PASS) |
| { |
| // Interior triangles with borrowed coverage are always the first |
| // fragment of the path at their pixel, so we don't need to check the |
| // current coverage value. |
| clipCoverage = fragCoverage; |
| } |
| else |
| #endif |
| { |
| clipData = unpackHalf2x16(PLS_LOADUI(clipBuffer)); |
| clipBufferID = clipData.g; |
| half initialCoverage = |
| clipBufferID == clipID ? clipData.r : make_half(.0); |
| clipCoverage = initialCoverage + fragCoverage; |
| } |
| |
| #ifdef @ENABLE_NESTED_CLIPPING |
| half outerClipID = v_clipIDs.y; |
| if (@ENABLE_NESTED_CLIPPING && outerClipID != .0) |
| { |
| half outerClipCoverage = .0; |
| #if defined(@DRAW_INTERIOR_TRIANGLES) && defined(@BORROWED_COVERAGE_PASS) |
| if (@BORROWED_COVERAGE_PASS) |
| { |
| // Interior triangles with borrowed coverage did not load the clip |
| // buffer already, so do that now. |
| clipData = unpackHalf2x16(PLS_LOADUI(clipBuffer)); |
| clipBufferID = clipData.g; |
| } |
| #endif |
| if (clipBufferID != clipID) |
| { |
| outerClipCoverage = clipBufferID == outerClipID ? clipData.r : .0; |
| // The coverage buffer is a free resource when rendering clip |
| // because we don't use it to track coverage. Use it instead to |
| // temporarily save the outer clip for nested clips. But make sure |
| // to write an invalid pathID so we don't corrupt any future paths |
| // that will be drawn. |
| PLS_STOREUI( |
| coverageBuffer, |
| packHalf2x16(make_half2(outerClipCoverage, INVALID_PATH_ID))); |
| } |
| else |
| { |
| outerClipCoverage = unpackHalf2x16(PLS_LOADUI(coverageBuffer)).r; |
| PLS_PRESERVE_UI(coverageBuffer); |
| } |
| clipCoverage = min(clipCoverage, outerClipCoverage); |
| } |
| else |
| #endif |
| { |
| PLS_PRESERVE_UI(coverageBuffer); |
| } |
| |
| PLS_STOREUI(clipBuffer, packHalf2x16(make_half2(clipCoverage, clipID))); |
| #ifndef @FIXED_FUNCTION_COLOR_OUTPUT |
| PLS_PRESERVE_4F(colorBuffer); |
| #endif |
| PLS_INTERLOCK_END; |
| |
| EMIT_PLS; |
| } |
| |
| #endif // FRAGMENT |
