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darn, broke the reverse direction and fixing it produces horrid code

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This commit is contained in:
Bill Currie 2003-03-20 21:24:04 +00:00
parent 1a18044b31
commit 4222c501a0
1 changed files with 94 additions and 36 deletions
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130
libs/util/tga.c
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@ -51,57 +51,115 @@ static __attribute__ ((unused)) const char rcsid[] =
static inline byte *
blit_rgb (byte *buf, int count, byte red, byte green, byte blue, int dir)
blit_rgb (byte *buf, int count, byte red, byte green, byte blue)
{
while (count--) {
*buf = red;
buf += dir;
*buf = green;
buf += dir;
*buf = blue;
buf += dir;
*buf = 255;
buf += dir;
*buf++ = red;
*buf++ = green;
*buf++ = blue;
*buf++ = 255;
}
return buf;
}
static inline byte *
blit_rgba (byte *buf, int count, byte red, byte green, byte blue, byte alpha,
int dir)
blit_rgba (byte *buf, int count, byte red, byte green, byte blue, byte alpha)
{
while (count--) {
*buf = red;
buf += dir;
*buf = green;
buf += dir;
*buf = blue;
buf += dir;
*buf = alpha;
buf += dir;
*buf++ = red;
*buf++ = green;
*buf++ = blue;
*buf++ = alpha;
}
return buf;
}
static inline byte *
read_bgr (byte *buf, int count, byte **data, int dir)
reverse_blit_rgb (byte *buf, int count, byte red, byte green, byte blue)
{
while (count--) {
*buf-- = 255;
*buf-- = blue;
*buf-- = green;
*buf-- = red;
}
return buf;
}
static inline byte *
reverse_blit_rgba (byte *buf, int count, byte red, byte green, byte blue,
byte alpha)
{
while (count--) {
*buf-- = alpha;
*buf-- = blue;
*buf-- = green;
*buf-- = red;
}
return buf;
}
static inline byte *
read_bgr (byte *buf, int count, byte **data)
{
byte blue = *(*data)++;
byte green = *(*data)++;
byte red = *(*data)++;
return blit_rgb (buf, count, red, green, blue, dir);
return blit_rgb (buf, count, red, green, blue);
}
static inline byte *
read_bgra (byte *buf, int count, byte **data, int dir)
read_bgra (byte *buf, int count, byte **data)
{
byte blue = *(*data)++;
byte green = *(*data)++;
byte red = *(*data)++;
byte alpha = *(*data)++;
return blit_rgba (buf, count, red, green, blue, alpha, dir);
return blit_rgba (buf, count, red, green, blue, alpha);
}
static inline byte *
read_rgb (byte *buf, int count, byte **data)
{
byte red = *(*data)++;
byte green = *(*data)++;
byte blue = *(*data)++;
return blit_rgb (buf, count, red, green, blue);
}
static inline byte *
read_rgba (byte *buf, int count, byte **data)
{
byte red = *(*data)++;
byte green = *(*data)++;
byte blue = *(*data)++;
byte alpha = *(*data)++;
return blit_rgba (buf, count, red, green, blue, alpha);
}
static inline byte *
reverse_read_bgr (byte *buf, int count, byte **data)
{
byte blue = *(*data)++;
byte green = *(*data)++;
byte red = *(*data)++;
return reverse_blit_rgb (buf, count, red, green, blue);
}
static inline byte *
reverse_read_bgra (byte *buf, int count, byte **data)
{
byte blue = *(*data)++;
byte green = *(*data)++;
byte red = *(*data)++;
byte alpha = *(*data)++;
return reverse_blit_rgba (buf, count, red, green, blue, alpha);
}
struct tex_s *
@ -166,14 +224,14 @@ LoadTGA (QFile *fin)
for (row = rows - 1; row >= 0; row--, pixrow -= span) {
pixcol = pixrow;
for (column = 0; column < columns; column++)
pixcol = read_bgr (pixcol, 1, &dataByte, 1);
pixcol = read_bgr (pixcol, 1, &dataByte);
}
break;
case 32:
for (row = rows - 1; row >= 0; row--, pixrow -= span) {
pixcol = pixrow;
for (column = 0; column < columns; column++)
pixcol = read_bgra (pixcol, 1, &dataByte, 1);
pixcol = read_bgra (pixcol, 1, &dataByte);
}
break;
}
@ -185,14 +243,14 @@ LoadTGA (QFile *fin)
for (row = rows - 1; row >= 0; row--, pixrow -= span) {
pixcol = pixrow;
for (column = columns - 1; column >= 0; column--)
pixcol = read_bgr (pixcol, 1, &dataByte, -1);
pixcol = reverse_read_bgr (pixcol, 1, &dataByte);
}
break;
case 32:
for (row = rows - 1; row >= 0; row--, pixrow -= span) {
pixcol = pixrow;
for (column = columns - 1; column >= 0; column--)
pixcol = read_bgra (pixcol, 1, &dataByte, -1);
pixcol = reverse_read_bgra (pixcol, 1, &dataByte);
}
break;
}
@ -204,14 +262,14 @@ LoadTGA (QFile *fin)
for (row = 0; row < rows; row++, pixrow += span) {
pixcol = pixrow;
for (column = 0; column < columns; column++)
pixcol = read_bgr (pixcol, 1, &dataByte, 1);
pixcol = read_bgr (pixcol, 1, &dataByte);
}
break;
case 32:
for (row = 0; row < rows; row++, pixrow += span) {
pixcol = pixrow;
for (column = 0; column < columns; column++)
pixcol = read_bgra (pixcol, 1, &dataByte, 1);
pixcol = read_bgra (pixcol, 1, &dataByte);
}
break;
}
@ -223,14 +281,14 @@ LoadTGA (QFile *fin)
for (row = 0; row < rows; row++, pixrow += span) {
pixcol = pixrow;
for (column = columns - 1; column >= 0; column--)
pixcol = read_bgr (pixcol, 1, &dataByte, -1);
pixcol = reverse_read_bgr (pixcol, 1, &dataByte);
}
break;
case 32:
for (row = 0; row < rows; row++, pixrow += span) {
pixcol = pixrow;
for (column = columns - 1; column >= 0; column--)
pixcol = read_bgra (pixcol, 1, &dataByte, -1);
pixcol = reverse_read_bgra (pixcol, 1, &dataByte);
}
break;
}
@ -239,7 +297,7 @@ LoadTGA (QFile *fin)
} else if (targa->image_type == 10) { // RLE compressed image
unsigned char packetHeader, packetSize;
byte *(*expand) (byte *buf, int count, byte **data, int dir);
byte *(*expand) (byte *buf, int count, byte **data);
pixrow = tex->data + (rows - 1) * span;
@ -258,10 +316,10 @@ LoadTGA (QFile *fin)
packetSize -= count;
if (packetHeader & 0x80) { // run-length packet
expand (pixcol, count, &dataByte, 1);
expand (pixcol, count, &dataByte);
} else { // non run-length packet
while (count--)
expand (pixcol, 1, &dataByte, 1);
expand (pixcol, 1, &dataByte);
}
column = 0;
pixcol = (pixrow -= span);
@ -270,10 +328,10 @@ LoadTGA (QFile *fin)
}
column += packetSize;
if (packetHeader & 0x80) { // run-length packet
pixcol = expand (pixcol, packetSize, &dataByte, 1);
pixcol = expand (pixcol, packetSize, &dataByte);
} else { // non run-length packet
while (packetSize--)
pixcol = expand (pixcol, 1, &dataByte, 1);
pixcol = expand (pixcol, 1, &dataByte);
}
}
}