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fixed tga headers

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This commit is contained in:
aap 2020-05-01 19:23:27 +02:00
parent dfedaee353
commit fd191856c4
1 changed files with 42 additions and 16 deletions
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58
src/tga.cpp
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@ -19,15 +19,9 @@
namespace rw {
// TODO: fuck packed structs
#ifndef RW_PS2
#pragma pack(push)
#pragma pack(1)
#define PACKED_STRUCT
#else
#define PACKED_STRUCT __attribute__((__packed__))
#endif
struct PACKED_STRUCT TGAHeader
// NB: this has padding and cannot be streamed directly!
struct TGAHeader
{
int8 IDlen;
int8 colorMapType;
@ -39,15 +33,48 @@ struct PACKED_STRUCT TGAHeader
int16 width, height;
uint8 depth;
uint8 descriptor;
void read(Stream *stream);
void write(Stream *stream);
};
#ifndef RW_PS2
#pragma pack(push)
#endif
void
TGAHeader::read(Stream *stream)
{
IDlen = stream->readI8();
colorMapType = stream->readI8();
imageType = stream->readI8();
colorMapOrigin = stream->readI16();
colorMapLength = stream->readI16();
colorMapDepth = stream->readI8();
xOrigin = stream->readI16();
yOrigin = stream->readI16();
width = stream->readI16();
height = stream->readI16();
depth = stream->readU8();
descriptor = stream->readU8();
}
void
TGAHeader::write(Stream *stream)
{
stream->writeI8(IDlen);
stream->writeI8(colorMapType);
stream->writeI8(imageType);
stream->writeI16(colorMapOrigin);
stream->writeI16(colorMapLength);
stream->writeI8(colorMapDepth);
stream->writeI16(xOrigin);
stream->writeI16(yOrigin);
stream->writeI16(width);
stream->writeI16(height);
stream->writeU8(depth);
stream->writeU8(descriptor);
}
Image*
readTGA(const char *afilename)
{
ASSERTLITTLE;
TGAHeader header;
Image *image;
char *filename;
@ -61,7 +88,7 @@ readTGA(const char *afilename)
rwFree(filename);
StreamMemory file;
file.open(data, length);
file.read8(&header, sizeof(header));
header.read(&file);
assert(header.imageType == 1 || header.imageType == 2);
file.seek(header.IDlen);
@ -126,7 +153,6 @@ readTGA(const char *afilename)
void
writeTGA(Image *image, const char *filename)
{
ASSERTLITTLE;
TGAHeader header;
StreamFile file;
if(!file.open(filename, "wb")){
@ -146,7 +172,7 @@ writeTGA(Image *image, const char *filename)
header.height = image->height;
header.depth = image->depth == 4 ? 8 : image->depth;
header.descriptor = 0x20 | (image->depth == 32 ? 8 : 0);
file.write8(&header, sizeof(header));
header.write(&file);
uint8 *palette = header.colorMapType ? image->palette : nil;
uint8 (*color)[4] = (uint8(*)[4])palette;;