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Fix divide by zero (issue 0000022)

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This commit is contained in:
Magnus Norddahl 2017-01-10 18:25:06 +01:00
parent ece8e95853
commit 4be291fb61
2 changed files with 2 additions and 1 deletions
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1
src/swrenderer/drawers/r_draw.cpp
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@ -647,6 +647,7 @@ namespace swrenderer
dc_x = x;
dc_iscale = iscale;
dc_textureheight = tex->GetHeight();
const FTexture::Span *span;
const BYTE *column;

2
tools/drawergen/fixedfunction/drawcolumncodegen.cpp
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@ -81,7 +81,6 @@ void DrawColumnCodegen::Generate(DrawColumnVariant variant, SSAValue args, SSAVa
stack_frac.store(texturefrac + iscale * skipped_by_thread(dest_y, thread));
iscale = iscale * thread.num_cores;
one = (1 << 30) / textureheight;
SSAIfBlock branch;
branch.if_block(is_simple_shade);
@ -97,6 +96,7 @@ void DrawColumnCodegen::LoopShade(DrawColumnVariant variant, bool isSimpleShade)
branch.if_block(is_nearest_filter);
Loop(variant, isSimpleShade, true);
branch.else_block();
one = (1 << 30) / textureheight;
stack_frac.store(stack_frac.load() - (one >> 1));
Loop(variant, isSimpleShade, false);
branch.end_block();