diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-07-08 15:11:23 -0600 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-07-08 15:11:53 -0600 |
| commit | c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1 (patch) | |
| tree | 4e69b13201c789bc9bf950f431b41729924ff7ef | |
| parent | fd6cb1b11d526d2e22d51441ab2629a10323e7b4 (diff) | |
added null texObj ptr check (bug 15567)
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index ecace9c502..bf7a1de03b 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -44,7 +44,8 @@ fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, SWcontext *swrast = SWRAST_CONTEXT(ctx); const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; - lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); + if (texObj) + lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); /* XXX use a float-valued TextureSample routine here!!! */ swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord, @@ -68,20 +69,23 @@ fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], { SWcontext *swrast = SWRAST_CONTEXT(ctx); const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; - const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel]; - const GLfloat texW = (GLfloat) texImg->WidthScale; - const GLfloat texH = (GLfloat) texImg->HeightScale; + GLfloat lambda; GLchan rgba[4]; - GLfloat lambda - = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ - texdx[1], texdy[1], /* dt/dx, dt/dy */ - texdx[3], texdy[2], /* dq/dx, dq/dy */ - texW, texH, - texcoord[0], texcoord[1], texcoord[3], - 1.0F / texcoord[3]) + lodBias; + if (texObj) { + const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel]; + const GLfloat texW = (GLfloat) texImg->WidthScale; + const GLfloat texH = (GLfloat) texImg->HeightScale; - lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); + lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ + texdx[1], texdy[1], /* dt/dx, dt/dy */ + texdx[3], texdy[2], /* dq/dx, dq/dy */ + texW, texH, + texcoord[0], texcoord[1], texcoord[3], + 1.0F / texcoord[3]) + lodBias; + + lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); + } swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord, &lambda, &rgba); |