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[GPU] More accurate vertex kill + PsParamGen/point documentation

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Triang3l
2022-04-27 23:10:56 +03:00
parent 5ec0c92601
commit b2b1d7b518
3 changed files with 92 additions and 19 deletions
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16
src/xenia/gpu/ucode.h
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@@ -1810,10 +1810,24 @@ enum class ExportRegister : uint32_t {
// See R6xx/R7xx registers for details (USE_VTX_POINT_SIZE, USE_VTX_EDGE_FLAG,
// USE_VTX_KILL_FLAG).
// X - PSIZE (gl_PointSize).
// According to tests and GL_AMD_program_binary_Z400 disassembly on an
// Adreno 200 device:
// * This is the full width and height of the point sprite (not half -
// gl_PointSize goes directly to oPts.x).
// * Clamped to PA_SU_POINT_MINMAX as a signed integer in rasterization:
// * -NaN - min
// * -Infinity - min
// * -Normal - min
// * -0 (0x80000000 - the smallest signed integer) - min
// * +0 - min
// * +Infinity - max
// * +NaN - max
// Y - EDGEFLAG (glEdgeFlag) for PrimitiveType::kPolygon wireframe/point
// drawing.
// Z - KILLVERTEX flag (used in 4D5307ED for grass), set for killing
// primitives based on PA_CL_CLIP_CNTL::VTX_KILL_OR condition.
// primitives based on PA_CL_CLIP_CNTL::VTX_KILL_OR condition if bits 0:30
// of this export value (the sign bit is ignored according to the
// IPR2015-00325 sequencer specification) are not zero.
kVSPointSizeEdgeFlagKillVertex = 63,
kPSColor0 = 0,