fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-08 11:18:08 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

mesa: if texObj is NULL in fetch_texel_*(), return black.

Browse source
This commit is contained in:
Brian Paul 2009-01-28 09:16:11 -07:00
parent 318e53a4bf
commit be1a76f88f
1 changed files with 32 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

52
src/mesa/swrast/s_fragprog.c
View file

@ -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;
}
}