diff options
| author | George Sapountzis <[email protected]> | 2006-12-07 17:53:59 +0200 |
|---|---|---|
| committer | George Sapountzis <[email protected]> | 2006-12-12 12:51:27 +0200 |
| commit | eed1a6de4b396ed6305cf34812a269c10c746d3c (patch) | |
| tree | c33be2024dadee015101776ef09b10d783f6d9ef /src/mesa/drivers | |
| parent | 26626c0052cd5442f609659aa9ed25ac78e65b55 (diff) | |
Bug 7790: Polygons incorrectly clipped by mach64 driver
un-break strict-aliasing rules
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/mach64/mach64_tris.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/src/mesa/drivers/dri/mach64/mach64_tris.c b/src/mesa/drivers/dri/mach64/mach64_tris.c index 4a0044be88c..08cc1849a12 100644 --- a/src/mesa/drivers/dri/mach64/mach64_tris.c +++ b/src/mesa/drivers/dri/mach64/mach64_tris.c @@ -1583,7 +1583,10 @@ static void mach64FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, mach64ContextPtr mmesa = MACH64_CONTEXT( ctx ); const GLuint vertsize = mmesa->vertex_size; GLint a; - GLfloat ooa; + union { + GLfloat f; + CARD32 u; + } ooa; GLuint xy; const GLuint xyoffset = 9; GLint xx[3], yy[3]; /* 2 fractional bits for hardware */ @@ -1621,7 +1624,7 @@ static void mach64FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, return; } - ooa = 16.0 / a; + ooa.f = 16.0 / a; vb = (CARD32 *)mach64AllocDmaLow( mmesa, vbsiz * sizeof(CARD32) ); vbchk = vb + vbsiz; @@ -1629,7 +1632,7 @@ static void mach64FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, COPY_VERTEX( vb, vertsize, v0, 1 ); COPY_VERTEX( vb, vertsize, v1, 2 ); COPY_VERTEX_OOA( vb, vertsize, v2, 3 ); - LE32_OUT( vb++, *(CARD32 *)&ooa ); + LE32_OUT( vb++, ooa.u ); i = 3; while (1) { @@ -1644,10 +1647,10 @@ static void mach64FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, a = (xx[0] - xx[2]) * (yy[1] - yy[2]) - (yy[0] - yy[2]) * (xx[1] - xx[2]); - ooa = 16.0 / a; + ooa.f = 16.0 / a; COPY_VERTEX_OOA( vb, vertsize, v0, 1 ); - LE32_OUT( vb++, *(CARD32 *)&ooa ); + LE32_OUT( vb++, ooa.u ); if (i >= n) break; @@ -1660,10 +1663,10 @@ static void mach64FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, a = (xx[0] - xx[2]) * (yy[1] - yy[2]) - (yy[0] - yy[2]) * (xx[1] - xx[2]); - ooa = 16.0 / a; + ooa.f = 16.0 / a; COPY_VERTEX_OOA( vb, vertsize, v1, 2 ); - LE32_OUT( vb++, *(CARD32 *)&ooa ); + LE32_OUT( vb++, ooa.u ); } assert( vb == vbchk ); |