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| author | Sebastian Rasmussen <sebras@gmail.com> | 2016-10-13 21:20:54 +0800 |
|---|---|---|
| committer | Sebastian Rasmussen <sebras@gmail.com> | 2016-10-14 01:19:07 +0800 |
| commit | ed229f9ac6c2d85e2cdd789aba03e1dfd3cd55fc (patch) | |
| tree | 3b9c486394be5f5fd9ac4c5233ff76686961100b /source/fitz/load-pnm.c | |
| parent | 126565f00653f7b6e05999ce309b8e07e14ef548 (diff) | |
| download | mupdf-ed229f9ac6c2d85e2cdd789aba03e1dfd3cd55fc.tar.xz | |
pnm: Support b/w PAM images with alpha.
Diffstat (limited to 'source/fitz/load-pnm.c')
| -rw-r--r-- | source/fitz/load-pnm.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/source/fitz/load-pnm.c b/source/fitz/load-pnm.c index abb97096..3f572907 100644 --- a/source/fitz/load-pnm.c +++ b/source/fitz/load-pnm.c @@ -4,6 +4,7 @@ enum { PAM_UNKNOWN = 0, PAM_BW, + PAM_BWA, PAM_GRAY, PAM_GRAYA, PAM_RGB, @@ -152,6 +153,7 @@ pnm_read_tupletype(fz_context *ctx, unsigned char *p, unsigned char *e, int *tup const struct { int len; char *str; int type; } tupletypes[] = { {13, "BLACKANDWHITE", PAM_BW}, + {19, "BLACKANDWHITE_ALPHA", PAM_BWA}, {9, "GRAYSCALE", PAM_GRAY}, {15, "GRAYSCALE_ALPHA", PAM_GRAYA}, {3, "RGB", PAM_RGB}, @@ -431,7 +433,7 @@ pam_binary_read_image(fz_context *ctx, struct info *pnm, unsigned char *p, unsig switch (pnm->depth) { case 1: pnm->tupletype = pnm->maxval == 1 ? PAM_BW : PAM_GRAY; break; - case 2: pnm->tupletype = PAM_GRAYA; break; + case 2: pnm->tupletype = pnm->maxval == 1 ? PAM_BWA : PAM_GRAYA; break; case 3: pnm->tupletype = PAM_RGB; break; case 4: pnm->tupletype = PAM_CMYK; break; case 5: pnm->tupletype = PAM_CMYKA; break; @@ -443,14 +445,20 @@ pam_binary_read_image(fz_context *ctx, struct info *pnm, unsigned char *p, unsig pnm->tupletype = PAM_GRAY; else if (pnm->tupletype == PAM_GRAY && pnm->maxval == 1) pnm->tupletype = PAM_BW; + else if (pnm->tupletype == PAM_BWA && pnm->maxval > 1) + pnm->tupletype = PAM_GRAYA; + else if (pnm->tupletype == PAM_GRAYA && pnm->maxval == 1) + pnm->tupletype = PAM_BWA; switch (pnm->tupletype) { + case PAM_BWA: + pnm->alpha = 1; + /* fallthrough */ case PAM_BW: pnm->cs = fz_device_gray(ctx); maxval = 1; - if (pnm->maxval == 1) - bitmap = 1; + bitmap = 1; break; case PAM_GRAYA: pnm->alpha = 1; |