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Fix gifanalyzer.c

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This commit is contained in:
Thomas Bernard 2018-01-08 17:30:56 +01:00
parent 26ab4c6844
commit d0417faad2
2 changed files with 23 additions and 15 deletions
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4
tools/gifanalyzer/Makefile Normal file
View File

@ -0,0 +1,4 @@
CFLAGS=-Wall
#LDLIBS=-lm
gifanalyzer: gifanalyzer.o

32
tools/gifanalyzer/gifanalyzer.c
View File

@ -52,36 +52,40 @@ int main(int argc, char* argv[])
fread(buffer,1,3,theFile);
int colors = ((buffer[0]&0b01110000)>>4)+1;
colors = pow(2,colors);
int bpp = (buffer[0]&0xF) +1;
int colors = 1 << (((buffer[0]&0b01110000)>>4)+1);
int color_table_size = 1 << ((buffer[0]&0x7)+1);
printf("Color palette: %#02.2x\n",buffer[0]&0xFF);
if (buffer[0] & 0b10000000)
printf("\tGlobal palette\n");
if (buffer[0] & 0b10000000) {
printf("\tGlobal palette");
if(buffer[0] & 0b00001000)
printf(" SORTED");
printf("\n");
}
printf("\tColor count: %d\n", colors);
printf("\tBits per pixel: %d\n",bpp);
printf("\tSize of color table : %d\t", color_table_size);
printf("Index of background color: %d\n",buffer[1]);
printf("(reserved byte: %d)\n",buffer[2]);
printf("pixel aspect ratio = %d\n",buffer[2]);
if(buffer[2] != 0) printf("\t aspect ratio = %d/64\n", 15 + buffer[2]);
printf("Color palette:\n");
for (int i = 0; i < pow(2,bpp); i++)
for (int i = 0; i < color_table_size; i++)
{
fread(buffer,1,3,theFile);
printf("\t%d: %u %u %u\t",i,buffer[0], buffer[1], buffer[2]);
if ((i+1)%4 ==0)puts("");
/*printf("\t%d: %u %u %u\t",i,buffer[0], buffer[1], buffer[2]);*/
printf(" %3d: #%02x%02x%02x",i,buffer[0], buffer[1], buffer[2]);
if ((i+1)%8 ==0)puts("");
}
int i = 0;
do {
fread(buffer,1,1,theFile);
i++;
} while (i != ',');
} while (buffer[0] != ',');
if (i > 1);
printf("Skipped %d meaningless bytes before image descriptor\n",i);
if (i > 1)
printf("Skipped %d meaningless bytes before image descriptor\n",i);
uint16_t x,y;