diff options
| author | Brian Paul <brianp@vmware.com> | 2009-01-28 09:16:11 -0700 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-01-28 09:16:11 -0700 |
| commit | be1a76f88f4c3482e61e0a048a0b28b6b628f223 (patch) | |
| tree | f3d59c62d50897444f006e8d0e5a3a87421ebc91 /src/mesa/swrast/s_fragprog.c | |
| parent | 318e53a4bf27499935c874f475af111ffaa71fdd (diff) | |
mesa: if texObj is NULL in fetch_texel_*(), return black.
Diffstat (limited to 'src/mesa/swrast/s_fragprog.c')
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 52 |
1 files changed, 32 insertions, 20 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index 525cf9d724..45ba91ff86 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -40,20 +40,26 @@ static void fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, GLuint unit, GLfloat color[4] ) { - GLchan rgba[4]; - SWcontext *swrast = SWRAST_CONTEXT(ctx); const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; - if (texObj) + if (texObj) { + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLchan rgba[4]; + 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, - &lambda, &rgba); - color[0] = CHAN_TO_FLOAT(rgba[0]); - color[1] = CHAN_TO_FLOAT(rgba[1]); - color[2] = CHAN_TO_FLOAT(rgba[2]); - color[3] = CHAN_TO_FLOAT(rgba[3]); + /* XXX use a float-valued TextureSample routine here!!! */ + swrast->TextureSample[unit](ctx, texObj, 1, + (const GLfloat (*)[4]) texcoord, + &lambda, &rgba); + color[0] = CHAN_TO_FLOAT(rgba[0]); + color[1] = CHAN_TO_FLOAT(rgba[1]); + color[2] = CHAN_TO_FLOAT(rgba[2]); + color[3] = CHAN_TO_FLOAT(rgba[3]); + } + else { + color[0] = color[1] = color[2] = color[3] = 0.0F; + } } @@ -69,13 +75,14 @@ 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; - GLfloat lambda; - GLchan rgba[4]; if (texObj) { - const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel]; + 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]; lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ texdx[1], texdy[1], /* dt/dx, dt/dy */ @@ -85,14 +92,19 @@ fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], 1.0F / texcoord[3]) + lodBias; lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); - } - swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord, - &lambda, &rgba); - color[0] = CHAN_TO_FLOAT(rgba[0]); - color[1] = CHAN_TO_FLOAT(rgba[1]); - color[2] = CHAN_TO_FLOAT(rgba[2]); - color[3] = CHAN_TO_FLOAT(rgba[3]); + /* XXX use a float-valued TextureSample routine here!!! */ + swrast->TextureSample[unit](ctx, texObj, 1, + (const GLfloat (*)[4]) texcoord, + &lambda, &rgba); + color[0] = CHAN_TO_FLOAT(rgba[0]); + color[1] = CHAN_TO_FLOAT(rgba[1]); + color[2] = CHAN_TO_FLOAT(rgba[2]); + color[3] = CHAN_TO_FLOAT(rgba[3]); + } + else { + color[0] = color[1] = color[2] = color[3] = 0.0F; + } } |