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

30
tools/gifanalyzer/gifanalyzer.c
View File

@ -52,35 +52,39 @@ int main(int argc, char* argv[])
fread(buffer,1,3,theFile); fread(buffer,1,3,theFile);
int colors = ((buffer[0]&0b01110000)>>4)+1; int colors = 1 << (((buffer[0]&0b01110000)>>4)+1);
colors = pow(2,colors); int color_table_size = 1 << ((buffer[0]&0x7)+1);
int bpp = (buffer[0]&0xF) +1;
printf("Color palette: %#02.2x\n",buffer[0]&0xFF); printf("Color palette: %#02.2x\n",buffer[0]&0xFF);
if (buffer[0] & 0b10000000) if (buffer[0] & 0b10000000) {
printf("\tGlobal palette\n"); printf("\tGlobal palette");
if(buffer[0] & 0b00001000)
printf(" SORTED");
printf("\n");
}
printf("\tColor count: %d\n", colors); 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("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"); 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); fread(buffer,1,3,theFile);
printf("\t%d: %u %u %u\t",i,buffer[0], buffer[1], buffer[2]); /*printf("\t%d: %u %u %u\t",i,buffer[0], buffer[1], buffer[2]);*/
if ((i+1)%4 ==0)puts(""); printf(" %3d: #%02x%02x%02x",i,buffer[0], buffer[1], buffer[2]);
if ((i+1)%8 ==0)puts("");
} }
int i = 0; int i = 0;
do { do {
fread(buffer,1,1,theFile); fread(buffer,1,1,theFile);
i++; i++;
} while (i != ','); } while (buffer[0] != ',');
if (i > 1); if (i > 1)
printf("Skipped %d meaningless bytes before image descriptor\n",i); printf("Skipped %d meaningless bytes before image descriptor\n",i);
uint16_t x,y; uint16_t x,y;