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Fix comment about RM_VISCVG in PreRender_FetchFbufCoverage (#1514)

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Tharo 2023-07-04 00:14:31 +01:00 committed by GitHub
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1 changed files with 5 additions and 5 deletions
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src/code/PreRender.c
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@ -369,12 +369,12 @@ void PreRender_FetchFbufCoverage(PreRender* this, Gfx** gfxp) {
// //
// G_RM_VISCVG is the following special render mode: // G_RM_VISCVG is the following special render mode:
// IM_RD : Allow read-modify-write operations on the framebuffer // IM_RD : Allow read-modify-write operations on the framebuffer
// FORCE_BL : Apply the blender to all pixels rather than just edges // FORCE_BL : Apply the blender to all pixels rather than just edges, skip the division step of the blend formula
// (G_BL_CLR_IN * G_BL_0 + G_BL_CLR_BL * G_BL_A_MEM) / (G_BL_0 + G_BL_CLR_BL) = G_BL_A_MEM // (G_BL_CLR_IN * G_BL_0 + G_BL_CLR_BL * G_BL_A_MEM) = G_BL_CLR_BL * G_BL_A_MEM
// //
// G_BL_A_MEM ("memory alpha") is coverage, therefore this blender configuration emits only the coverage // G_BL_A_MEM ("memory alpha") is coverage, therefore this blender configuration emits only the coverage (up to a
// and discards any pixel colors. For an RGBA16 framebuffer, each of the three color channels r,g,b will // constant factor determined by blend color) and discards any pixel colors. For an RGBA16 framebuffer, each of the
// receive the coverage value individually. // three color channels r,g,b will receive the coverage value individually.
// //
// Also disables other modes such as alpha compare and texture perspective correction // Also disables other modes such as alpha compare and texture perspective correction
gDPSetOtherMode(gfx++, gDPSetOtherMode(gfx++,