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Change bitmap signedness to allow conversion to other data types

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Buffered bitmap array should have been type unsigned char not type char
Includes change to manual
In response to (and hopefully fixing) #182 reported by Marcelo Antunes
This commit is contained in:
Robin Stuart
2020-03-29 13:42:33 +01:00
parent e8b56faa11
commit 52214c5a1c
3 changed files with 9 additions and 8 deletions
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4
backend/raster.c
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@@ -61,7 +61,7 @@ static void buffer_plot(struct zint_symbol *symbol, char *pixelbuf) {
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
int row, column, i;
symbol->bitmap = (char *) malloc(symbol->bitmap_width * symbol->bitmap_height * 3);
symbol->bitmap = (unsigned char *) malloc(symbol->bitmap_width * symbol->bitmap_height * 3);
fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
@@ -69,7 +69,7 @@ static void buffer_plot(struct zint_symbol *symbol, char *pixelbuf) {
bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
for (row = 0; row < symbol->bitmap_height; row++) {
for (column = 0; column < symbol->bitmap_width; column++) {
i = ((row * symbol->bitmap_width) + column) * 3;

2
backend/zint.h
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@@ -125,7 +125,7 @@ extern "C" {
unsigned char encoded_data[200][143];
int row_height[200]; /* Largest symbol is 189 x 189 Han Xin */
char errtxt[100];
char *bitmap;
unsigned char *bitmap;
int bitmap_width;
int bitmap_height;
unsigned int bitmap_byte_length;