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(RBMP) Cleanups

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This commit is contained in:
twinaphex 2016-12-18 14:51:57 +01:00
parent 35de6df7f9
commit e9d9f1d90f
1 changed files with 70 additions and 40 deletions
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110
libretro-common/formats/bmp/rbmp.c
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@ -37,9 +37,9 @@
typedef struct
{
int (*read) (void *user,char *data,int size); /* fill 'data' with 'size' bytes. return number of bytes actually read */
void (*skip) (void *user,int n); /* skip the next 'n' bytes, or 'unget' the last -n bytes if negative */
int (*eof) (void *user); /* returns nonzero if we are at end of file/data */
int (*read) (void *user,char *data,int size);
void (*skip) (void *user,int n);
int (*eof) (void *user);
} rbmp_io_callbacks;
typedef struct
@ -70,19 +70,18 @@ static void rbmp__refill_buffer(rbmp__context *s);
/* initialize a memory-decode context */
static void rbmp__start_mem(rbmp__context *s, unsigned char const *buffer, int len)
{
s->io.read = NULL;
s->io.read = NULL;
s->read_from_callbacks = 0;
s->img_buffer = s->img_buffer_original = (unsigned char *) buffer;
s->img_buffer_end = (unsigned char *) buffer+len;
s->img_buffer = (unsigned char*)buffer;
s->img_buffer_original = (unsigned char*)buffer;
s->img_buffer_end = (unsigned char*)buffer+len;
}
static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y, int *comp, int req_comp);
static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
int *comp, int req_comp);
#define rbmp__err(x,y) 0
#define rbmp__errpf(x,y) ((float *) (rbmp__err(x,y)?NULL:NULL))
#define rbmp__errpuc(x,y) ((unsigned char *) (rbmp__err(x,y)?NULL:NULL))
static unsigned char *rbmp_load_from_memory(unsigned char const *buffer, int len, unsigned *x, unsigned *y, int *comp, int req_comp)
static unsigned char *rbmp_load_from_memory(unsigned char const *buffer, int len,
unsigned *x, unsigned *y, int *comp, int req_comp)
{
rbmp__context s;
rbmp__start_mem(&s,buffer,len);
@ -155,7 +154,8 @@ static uint32_t rbmp__get32le(rbmp__context *s)
return z + (rbmp__get16le(s) << 16);
}
#define RBMP__BYTECAST(x) ((unsigned char) ((x) & 255)) /* truncate int to byte without warnings */
/* truncate int to byte without warnings */
#define RBMP__BYTECAST(x) ((unsigned char) ((x) & 255))
static unsigned char rbmp__compute_y(int r, int g, int b)
{
@ -172,14 +172,17 @@ static unsigned char *rbmp__convert_format(
int i,j;
unsigned char *good;
if (req_comp == img_n) return data;
if (req_comp == img_n)
return data;
retro_assert(req_comp >= 1 && req_comp <= 4);
good = (unsigned char *) malloc(req_comp * x * y);
if (good == NULL)
{
/* Out of memory */
free(data);
return rbmp__errpuc("outofmem", "Out of memory");
return 0;
}
for (j=0; j < (int) y; ++j)
@ -254,7 +257,8 @@ static unsigned char *rbmp__convert_format(
static int rbmp__high_bit(unsigned int z)
{
int n=0;
if (z == 0) return -1;
if (z == 0)
return -1;
if (z >= 0x10000) n += 16, z >>= 16;
if (z >= 0x00100) n += 8, z >>= 8;
if (z >= 0x00010) n += 4, z >>= 4;
@ -294,24 +298,28 @@ static int rbmp__shiftsigned(int v, int shift, int bits)
return result;
}
static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y, int *comp, int req_comp)
static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
int *comp, int req_comp)
{
unsigned char *out;
unsigned int mr=0,mg=0,mb=0,ma=0;
unsigned char pal[256][4];
int psize=0,i,j,compress=0,width;
int bpp, flip_vertically, pad, target, offset, hsz;
int psize=0,i,j,compress=0,width;
unsigned int mr=0,mg=0,mb=0,ma=0;
/* Corrupt BMP? */
if (rbmp__get8(s) != 'B' || rbmp__get8(s) != 'M')
return rbmp__errpuc("not BMP", "Corrupt BMP");
return 0;
rbmp__get32le(s); /* discard filesize */
rbmp__get16le(s); /* discard reserved */
rbmp__get16le(s); /* discard reserved */
offset = rbmp__get32le(s);
hsz = rbmp__get32le(s);
/* BMP type not supported? */
if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
return rbmp__errpuc("unknown BMP", "BMP type not supported: unknown");
return 0;
if (hsz == 12)
{
@ -323,11 +331,17 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
s->img_x = rbmp__get32le(s);
s->img_y = rbmp__get32le(s);
}
/* Bad BMP? */
if (rbmp__get16le(s) != 1)
return rbmp__errpuc("bad BMP", "bad BMP");
return 0;
bpp = rbmp__get16le(s);
/* BMP 1-bit type not supported? */
if (bpp == 1)
return rbmp__errpuc("monochrome", "BMP type not supported: 1-bit");
return 0;
flip_vertically = ((int) s->img_y) > 0;
s->img_y = abs((int) s->img_y);
@ -340,14 +354,16 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
{
compress = rbmp__get32le(s);
/* BMP RLE type not supported? */
if (compress == 1 || compress == 2)
return rbmp__errpuc("BMP RLE", "BMP type not supported: RLE");
return 0;
rbmp__get32le(s); /* discard sizeof */
rbmp__get32le(s); /* discard hres */
rbmp__get32le(s); /* discard vres */
rbmp__get32le(s); /* discard colors used */
rbmp__get32le(s); /* discard max important */
if (hsz == 40 || hsz == 56)
{
if (hsz == 56)
@ -382,14 +398,18 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
mr = rbmp__get32le(s);
mg = rbmp__get32le(s);
mb = rbmp__get32le(s);
/* not documented, but generated by photoshop and handled by mspaint */
/* not documented, but generated by
* Photoshop and handled by MS Paint */
/* Bad BMP ?*/
if (mr == mg && mg == mb)
return rbmp__errpuc("bad BMP", "bad BMP");
return 0;
break;
default:
break;
}
return rbmp__errpuc("bad BMP", "bad BMP");
/* Bad BMP? */
return 0;
}
}
else
@ -399,35 +419,40 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
mg = rbmp__get32le(s);
mb = rbmp__get32le(s);
ma = rbmp__get32le(s);
rbmp__get32le(s); /* discard color space */
rbmp__get32le(s); /* Discard color space */
for (i=0; i < 12; ++i)
rbmp__get32le(s); /* discard color space parameters */
rbmp__get32le(s); /* Discard color space parameters */
if (hsz == 124)
{
rbmp__get32le(s); /* discard rendering intent */
rbmp__get32le(s); /* discard offset of profile data */
rbmp__get32le(s); /* discard size of profile data */
rbmp__get32le(s); /* discard reserved */
rbmp__get32le(s); /* Discard rendering intent */
rbmp__get32le(s); /* Discard offset of profile data */
rbmp__get32le(s); /* Discard size of profile data */
rbmp__get32le(s); /* Discard reserved */
}
}
if (bpp < 16)
psize = (offset - 14 - hsz) >> 2;
}
s->img_n = ma ? 4 : 3;
if (req_comp && req_comp >= 3) /* we can directly decode 3 or 4 */
if (req_comp && req_comp >= 3) /* We can directly decode 3 or 4 */
target = req_comp;
else
target = s->img_n; /* if they want monochrome, we'll post-convert */
target = s->img_n; /* If they want monochrome, we'll post-convert */
out = (unsigned char *) malloc(target * s->img_x * s->img_y);
if (!out)
return rbmp__errpuc("outofmem", "Out of memory");
return 0;
if (bpp < 16)
{
int z=0;
/* Corrupt BMP? */
if (psize == 0 || psize > 256)
{
free(out);
return rbmp__errpuc("invalid", "Corrupt BMP");
return 0;
}
for (i=0; i < psize; ++i)
@ -446,9 +471,11 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
width = s->img_x;
else
{
/* Corrupt BMP */
free(out);
return rbmp__errpuc("bad bpp", "Corrupt BMP");
return 0;
}
pad = (-width)&3;
for (j=0; j < (int) s->img_y; ++j)
{
@ -500,11 +527,13 @@ static unsigned char *rbmp__bmp_load(rbmp__context *s, unsigned *x, unsigned *y,
if (!easy)
{
/* Corrupt BMP? */
if (!mr || !mg || !mb)
{
free(out);
return rbmp__errpuc("bad masks", "Corrupt BMP");
return 0;
}
/* right shift amt to put high bit in position #7 */
rshift = rbmp__high_bit(mr)-7; rcount = rbmp__bitcount(mr);
gshift = rbmp__high_bit(mg)-7; gcount = rbmp__bitcount(mg);
@ -589,7 +618,8 @@ int rbmp_process_image(rbmp_t *rbmp, void **buf_data,
if (!rbmp)
return IMAGE_PROCESS_ERROR;
rbmp->output_image = (uint32_t*)rbmp_load_from_memory(rbmp->buff_data, size, width, height, &comp, 4);
rbmp->output_image = (uint32_t*)rbmp_load_from_memory(rbmp->buff_data,
size, width, height, &comp, 4);
*buf_data = rbmp->output_image;
rbmp_convert_frame(rbmp->output_image, *width, *height);