mirror of
https://github.com/encounter/cpp3ds.git
synced 2026-03-30 11:04:22 -07:00
Thomas Edvalson
52 lines
1.4 KiB
V Shell
52 lines
1.4 KiB
V Shell
// This shader provides the basics needed for getting started with cpp3ds
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// (and getting started with most non-cpp3ds orthogonal 2d homebrew too).
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// It's enabled by default in cpp3ds::Game unless you specify a shader yourself.
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// setup constants
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.alias myconst c32 as (1.0, 0.0, 0.5, 1.0)
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// x = 1/255
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.alias colorfix c33 as (0.0039215686, 0, 0, 0)
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// setup output map
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.alias outpos o0 as position
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.alias outcol o1 as color
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.alias outtex0 o2.xyzw as texcoord0 // Would like to use .xy instead, but this is not supported by ctrulib currently
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.alias outtex1 o3.xyzw as texcoord1
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.alias outtex2 o4.xyzw as texcoord2
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// setup uniform map, for use with SHDR_GetUniformRegister
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.alias projection c0-c3
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.alias modelview c4-c7
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.alias texture c8-c11
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main:
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mov r1.xy, v0.xy
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mov r1.zw, myconst.yw
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mdvl: // tempreg = mdlvMtx * in.pos
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dp4 r0.x, modelview[0], r1
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dp4 r0.y, modelview[1], r1
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dp4 r0.z, modelview[2], r1
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mov r0.w, myconst.w
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proj: // result.pos = projMtx * tempreg
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dp4 outpos.x, projection[0], r0
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dp4 outpos.y, projection[1], r0
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dp4 outpos.z, projection[2], r0
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dp4 outpos.w, projection[3], r0
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tex: // result.texcoord = in.texcoord
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dp4 outtex0.x, texture[0], v2
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dp4 outtex0.y, texture[1], v2
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mov outtex0.zw, myconst.zw
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mov outtex1, myconst.yyyw
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mov outtex2, myconst.yyyw
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color: // result.color = in.color
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mul outcol, v1.xyzw, colorfix.xxxx
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nop
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end
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endmain:
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