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update pic.c from latest code

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after lots of cherry-pick I found that for some strange reason,
pic.c is not updated and I cannot find out which commit I missed.
So I simply copied the latest pic.c from the master branch here.
This commit is contained in:
Qingping Hou
2012-10-31 22:54:36 -04:00
parent 6f6cb3c1a9
commit 625de9b260
1 changed files with 26 additions and 0 deletions
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26
pic.c
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@@ -20,6 +20,7 @@
#include <string.h>
#include <stdio.h>
#include <math.h>
#include "blitbuffer.h"
#include "drawcontext.h"
#include "pic.h"
@@ -86,6 +87,11 @@ static int openDocument(lua_State *L) {
} else {
free(raw_image);
return luaL_error(L, "Unsupported image format");
}
doc->width = width;
doc->height = height;
doc->components = components;
return 1;
}
@@ -165,6 +171,26 @@ static int drawPage(lua_State *L) {
scaleImage(scaled_image, page->image, img_width, img_height, img_new_width, img_new_height);
uint8_t *bbptr = bb->data;
uint8_t *pmptr = scaled_image;
bbptr += bb->pitch * y_offset;
for(y = y_offset; y < img_new_height; y++) {
for(x = x_offset/2; x < (img_new_width / 2); x++) {
int p = x*2 - x_offset;
unsigned char low = 15 - (pmptr[p + 1] >> 4);
unsigned char high = 15 - (pmptr[p] >> 4);
if (adjust_pixels)
bbptr[x] = adjusted_high[high] | adjusted_low[low];
else
bbptr[x] = (high << 4) | low;
}
if (img_new_width & 1)
bbptr[x] = 255 - (pmptr[x*2] & 0xF0);
bbptr += bb->pitch;
pmptr += img_new_width;
}
free(scaled_image);
return 0;
}