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tiff2pdf: avoid divide by 0

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fixes #133 http://bugzilla.maptools.org/show_bug.cgi?id=2796
This commit is contained in:
Thomas Bernard 2020-03-18 01:37:54 +01:00
parent 7c8dafc28c
commit dbc90f9374
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GPG Key ID: 0FF11B67A5C0863C
1 changed files with 15 additions and 9 deletions
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24
tools/tiff2pdf.c
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@ -4993,9 +4993,11 @@ tsize_t t2p_write_pdf_xobject_cs(T2P* t2p, TIFF* output){
X_W = t2p->tiff_whitechromaticities[0];
Y_W = t2p->tiff_whitechromaticities[1];
Z_W = 1.0F - (X_W + Y_W);
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0F;
if (Y_W != 0.0F) {
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0F;
}
buflen=snprintf(buffer, sizeof(buffer), "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
check_snprintf_ret(t2p, buflen, buffer);
written += t2pWriteFile(output, (tdata_t) buffer, buflen);
@ -5124,9 +5126,11 @@ tsize_t t2p_write_pdf_xobject_calcs(T2P* t2p, TIFF* output){
X_W = t2p->tiff_whitechromaticities[0];
Y_W = t2p->tiff_whitechromaticities[1];
Z_W = 1.0F - (X_W + Y_W);
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0F;
if (Y_W != 0.0F) {
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0F;
}
}
if(t2p->pdf_colorspace & T2P_CS_CALRGB){
written += t2pWriteFile(output, (tdata_t) "/CalRGB ", 8);
@ -5151,9 +5155,11 @@ tsize_t t2p_write_pdf_xobject_calcs(T2P* t2p, TIFF* output){
X_W = (X_R * R) + (X_G * G) + (X_B * B);
Y_W = (Y_R * R) + (Y_G * G) + (Y_B * B);
Z_W = (Z_R * R) + (Z_G * G) + (Z_B * B);
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0;
if (Y_W != 0.0F) {
X_W /= Y_W;
Z_W /= Y_W;
Y_W = 1.0;
}
}
written += t2pWriteFile(output, (tdata_t) "<< \n", 4);
if(t2p->pdf_colorspace & T2P_CS_CALGRAY){