mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 23:32:09 +00:00
support RLE tga files for all 4 directions
This commit is contained in:
Bill Currie
parent
abdb21eadc
commit
b2bc3f13ea
1 changed files with 161 additions and 115 deletions
276
libs/util/tga.c
276
libs/util/tga.c
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@ -141,6 +141,155 @@ reverse_read_bgra (byte *buf, int count, byte **data)
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return reverse_blit_rgba (buf, count, red, green, blue, alpha);
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}
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static inline void
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setup_pixrow_span (TargaHeader *targa, tex_t *tex, byte **_pixrow, int *_span)
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{
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byte *pixrow;
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int span;
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span = targa->width * 4;
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pixrow = tex->data;
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if (targa->attributes & 0x10) {
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// right to left
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pixrow += span - 4;
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}
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if (!(targa->attributes & 0x20)) {
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// bottom to top
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pixrow += (targa->height - 1) * span;
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span = -span;
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}
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*_pixrow = pixrow;
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*_span = span;
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}
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static void
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decode_truecolor_24 (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span);
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if (targa->attributes & 0x10) {
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = reverse_read_bgr (pixcol, 1, &dataByte);
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pixrow += span;
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}
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} else {
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = read_bgr (pixcol, 1, &dataByte);
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pixrow += span;
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}
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}
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}
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static void
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decode_truecolor_32 (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span);
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if (targa->attributes & 0x10) {
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = reverse_read_bgra (pixcol, 1, &dataByte);
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pixrow += span;
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}
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} else {
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = 0; column < columns; column++)
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pixcol = read_bgra (pixcol, 1, &dataByte);
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pixrow += span;
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}
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}
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}
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#define rle_expand(expand) \
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do { \
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unsigned char packetHeader, packetSize; \
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while (rows-- > 0) { \
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pixcol = pixrow; \
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pixrow += span; \
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for (column = columns; column > 0; ) { \
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packetHeader = *dataByte++; \
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packetSize = 1 + (packetHeader & 0x7f); \
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while (packetSize > column) { \
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int count = column; \
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\
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packetSize -= count; \
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if (packetHeader & 0x80) { /* run-length packet */ \
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expand (pixcol, count, &dataByte); \
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} else { /* non run-length packet */ \
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while (count--) \
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expand (pixcol, 1, &dataByte); \
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} \
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column = columns; \
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pixcol = pixrow; \
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pixrow += span; \
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if (rows-- <= 0) \
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goto done_##expand; \
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} \
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column -= packetSize; \
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if (packetHeader & 0x80) { /* run-length packet */ \
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pixcol = expand (pixcol, packetSize, &dataByte); \
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} else { /* non run-length packet */ \
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while (packetSize--) \
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pixcol = expand (pixcol, 1, &dataByte); \
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} \
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} \
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} \
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done_##expand:; \
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} while (0)
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static void
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decode_truecolor_24_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span);
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if (targa->attributes & 0x10)
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rle_expand (reverse_read_bgr);
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else
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rle_expand (read_bgr);
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}
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static void
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decode_truecolor_32_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span);
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if (targa->attributes & 0x10)
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rle_expand (reverse_read_bgr);
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else
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rle_expand (read_bgr);
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}
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struct tex_s *
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LoadTGA (QFile *fin)
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{
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@ -195,126 +344,23 @@ LoadTGA (QFile *fin)
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span = columns * 4; // tex->format
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if (targa->image_type == 2) { // Uncompressed image
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switch (targa->attributes & 48) {
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case 0: // Origin at bottom left
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pixrow = tex->data + (rows - 1) * span;
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switch (targa->pixel_size) {
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case 24:
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for (row = rows - 1; row >= 0; row--, pixrow -= span) {
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pixcol = pixrow;
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for (column = 0; column < columns; column++)
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pixcol = read_bgr (pixcol, 1, &dataByte);
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}
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break;
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case 32:
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for (row = rows - 1; row >= 0; row--, pixrow -= span) {
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pixcol = pixrow;
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for (column = 0; column < columns; column++)
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pixcol = read_bgra (pixcol, 1, &dataByte);
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}
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break;
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}
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switch (targa->pixel_size) {
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case 24:
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decode_truecolor_24 (targa, tex, dataByte);
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break;
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case 16: // Origin at bottom right
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pixrow = tex->data + rows * span - 4;
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switch (targa->pixel_size) {
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case 24:
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for (row = rows - 1; row >= 0; row--, pixrow -= span) {
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pixcol = pixrow;
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for (column = columns - 1; column >= 0; column--)
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pixcol = reverse_read_bgr (pixcol, 1, &dataByte);
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}
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break;
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case 32:
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for (row = rows - 1; row >= 0; row--, pixrow -= span) {
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pixcol = pixrow;
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for (column = columns - 1; column >= 0; column--)
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pixcol = reverse_read_bgra (pixcol, 1, &dataByte);
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}
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break;
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}
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break;
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case 32: // Origin at top left
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pixrow = tex->data;
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switch (targa->pixel_size) {
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case 24:
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for (row = 0; row < rows; row++, pixrow += span) {
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pixcol = pixrow;
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for (column = 0; column < columns; column++)
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pixcol = read_bgr (pixcol, 1, &dataByte);
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}
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break;
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case 32:
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for (row = 0; row < rows; row++, pixrow += span) {
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pixcol = pixrow;
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for (column = 0; column < columns; column++)
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pixcol = read_bgra (pixcol, 1, &dataByte);
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}
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break;
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}
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break;
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case 48: // Origin at top right
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pixrow = tex->data + span - 4;
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switch (targa->pixel_size) {
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case 24:
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for (row = 0; row < rows; row++, pixrow += span) {
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pixcol = pixrow;
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for (column = columns - 1; column >= 0; column--)
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pixcol = reverse_read_bgr (pixcol, 1, &dataByte);
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}
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break;
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case 32:
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for (row = 0; row < rows; row++, pixrow += span) {
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pixcol = pixrow;
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for (column = columns - 1; column >= 0; column--)
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pixcol = reverse_read_bgra (pixcol, 1, &dataByte);
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}
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break;
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}
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case 32:
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decode_truecolor_32 (targa, tex, dataByte);
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break;
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}
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} else if (targa->image_type == 10) { // RLE compressed image
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unsigned char packetHeader, packetSize;
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byte *(*expand) (byte *buf, int count, byte **data);
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pixrow = tex->data + (rows - 1) * span;
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if (targa->pixel_size == 24)
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expand = read_bgr;
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else
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expand = read_bgra;
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for (row = rows - 1; row >= 0; row--, pixrow -= span) {
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pixcol = pixrow;
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for (column = 0; column < columns;) {
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packetHeader = *dataByte++;
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packetSize = 1 + (packetHeader & 0x7f);
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while (packetSize > columns - column) {
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int count = columns - column;
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packetSize -= count;
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if (packetHeader & 0x80) { // run-length packet
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expand (pixcol, count, &dataByte);
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} else { // non run-length packet
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while (count--)
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expand (pixcol, 1, &dataByte);
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}
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column = 0;
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pixcol = (pixrow -= span);
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if (--row < 0)
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goto done;
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}
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column += packetSize;
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if (packetHeader & 0x80) { // run-length packet
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pixcol = expand (pixcol, packetSize, &dataByte);
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} else { // non run-length packet
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while (packetSize--)
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pixcol = expand (pixcol, 1, &dataByte);
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}
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}
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switch (targa->pixel_size) {
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case 24:
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decode_truecolor_24_rle (targa, tex, dataByte);
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break;
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case 32:
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decode_truecolor_32_rle (targa, tex, dataByte);
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break;
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}
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done:;
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}
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Hunk_FreeToLowMark (targa_mark);
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