}
TargaHeader;
-TargaHeader targa_header;
-
+void PrintTargaHeader(TargaHeader *t)
+{
+ Con_Printf("TargaHeader:\n");
+ Con_Printf("uint8 id_length = %i;\n", t->id_length);
+ Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
+ Con_Printf("uint8 image_type = %i;\n", t->image_type);
+ Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
+ Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
+ Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
+ Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
+ Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
+ Con_Printf("uint16 width = %i;\n", t->width);
+ Con_Printf("uint16 height = %i;\n", t->height);
+ Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
+ Con_Printf("uint8 attributes = %i;\n", t->attributes);
+}
/*
=============
*/
qbyte *LoadTGA (const qbyte *f, int matchwidth, int matchheight)
{
- int x, y, row_inc;
- unsigned char red, green, blue, alpha, run, runlen;
+ int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen;
qbyte *pixbuf, *image_rgba;
const qbyte *fin, *enddata;
+ TargaHeader targa_header;
+ unsigned char palette[256*4], *p;
- if (loadsize < 18+3)
+ if (loadsize < 19)
return NULL;
+
+ enddata = f + loadsize;
+
targa_header.id_length = f[0];
targa_header.colormap_type = f[1];
targa_header.image_type = f[2];
targa_header.pixel_size = f[16];
targa_header.attributes = f[17];
- if (targa_header.image_type != 2 && targa_header.image_type != 10)
+ image_width = targa_header.width;
+ image_height = targa_header.height;
+
+ fin = f + 18;
+ if (targa_header.id_length != 0)
+ fin += targa_header.id_length; // skip TARGA image comment
+ if (targa_header.image_type == 2 || targa_header.image_type == 10)
{
- Con_Printf ("LoadTGA: Only type 2 and 10 targa RGB images supported\n");
+ if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
+ {
+ Con_Printf ("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ }
+ else if (targa_header.image_type == 1 || targa_header.image_type == 9)
+ {
+ if (targa_header.pixel_size != 8)
+ {
+ Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ if (targa_header.colormap_length != 256)
+ {
+ Con_Printf ("LoadTGA: only 256 colormap_length supported\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ if (targa_header.colormap_index)
+ {
+ Con_Printf ("LoadTGA: colormap_index not supported\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ if (targa_header.colormap_size == 24)
+ {
+ for (x = 0;x < targa_header.colormap_length;x++)
+ {
+ palette[x*4+2] = *fin++;
+ palette[x*4+1] = *fin++;
+ palette[x*4+0] = *fin++;
+ palette[x*4+3] = 255;
+ }
+ }
+ else if (targa_header.colormap_size == 32)
+ {
+ for (x = 0;x < targa_header.colormap_length;x++)
+ {
+ palette[x*4+2] = *fin++;
+ palette[x*4+1] = *fin++;
+ palette[x*4+0] = *fin++;
+ palette[x*4+3] = *fin++;
+ }
+ }
+ else
+ {
+ Con_Printf ("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ }
+ else if (targa_header.image_type == 3 || targa_header.image_type == 11)
+ {
+ if (targa_header.pixel_size != 8)
+ {
+ Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
+ PrintTargaHeader(&targa_header);
+ return NULL;
+ }
+ }
+ else
+ {
+ Con_Printf ("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
+ PrintTargaHeader(&targa_header);
return NULL;
}
- if (targa_header.colormap_type != 0 || (targa_header.pixel_size != 32 && targa_header.pixel_size != 24))
+ if (targa_header.attributes & 0x10)
{
- Con_Printf ("LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
+ Con_Printf ("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
return NULL;
}
- enddata = f + loadsize;
-
- image_width = targa_header.width;
- image_height = targa_header.height;
-
image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
if (!image_rgba)
{
return NULL;
}
- fin = f + 18;
- if (targa_header.id_length != 0)
- fin += targa_header.id_length; // skip TARGA image comment
-
// If bit 5 of attributes isn't set, the image has been stored from bottom to top
if ((targa_header.attributes & 0x20) == 0)
{
row_inc = 0;
}
- if (targa_header.image_type == 2)
+ compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
+ x = 0;
+ y = 0;
+ red = green = blue = alpha = 255;
+ while (y < image_height)
{
- // Uncompressed, RGB images
- if (targa_header.pixel_size == 24)
+ // decoder is mostly the same whether it's compressed or not
+ readpixelcount = 1000000;
+ runlen = 1000000;
+ if (compressed && fin < enddata)
{
- if (fin + image_width * image_height * 3 <= enddata)
- {
- for(y = 0;y < image_height;y++)
- {
- for(x = 0;x < image_width;x++)
- {
- *pixbuf++ = fin[2];
- *pixbuf++ = fin[1];
- *pixbuf++ = fin[0];
- *pixbuf++ = 255;
- fin += 3;
- }
- pixbuf += row_inc;
- }
- }
+ runlen = *fin++;
+ // high bit indicates this is an RLE compressed run
+ if (runlen & 0x80)
+ readpixelcount = 1;
+ runlen = 1 + (runlen & 0x7f);
}
- else
+
+ while((runlen--) && y < image_height)
{
- if (fin + image_width * image_height * 4 <= enddata)
+ if (readpixelcount > 0)
{
- for(y = 0;y < image_height;y++)
+ readpixelcount--;
+ red = green = blue = alpha = 255;
+ if (fin < enddata)
{
- for(x = 0;x < image_width;x++)
+ switch(targa_header.image_type)
{
- *pixbuf++ = fin[2];
- *pixbuf++ = fin[1];
- *pixbuf++ = fin[0];
- *pixbuf++ = fin[3];
- fin += 4;
- }
- pixbuf += row_inc;
- }
- }
- }
- }
- else if (targa_header.image_type==10)
- {
- // Runlength encoded RGB images
- x = 0;
- y = 0;
- while (y < image_height && fin < enddata)
- {
- runlen = *fin++;
- if (runlen & 0x80)
- {
- // RLE compressed run
- runlen = 1 + (runlen & 0x7f);
- if (targa_header.pixel_size == 24)
- {
- if (fin + 3 > enddata)
+ case 1:
+ case 9:
+ // colormapped
+ p = palette + (*fin++) * 4;
+ red = p[0];
+ green = p[1];
+ blue = p[2];
+ alpha = p[3];
break;
- blue = *fin++;
- green = *fin++;
- red = *fin++;
- alpha = 255;
- }
- else
- {
- if (fin + 4 > enddata)
+ case 2:
+ case 10:
+ // BGR or BGRA
+ blue = *fin++;
+ if (fin < enddata)
+ green = *fin++;
+ if (fin < enddata)
+ red = *fin++;
+ if (targa_header.pixel_size == 32 && fin < enddata)
+ alpha = *fin++;
+ break;
+ case 3:
+ case 11:
+ // greyscale
+ red = green = blue = *fin++;
break;
- blue = *fin++;
- green = *fin++;
- red = *fin++;
- alpha = *fin++;
- }
-
- while (runlen && y < image_height)
- {
- run = runlen;
- if (run > image_width - x)
- run = image_width - x;
- x += run;
- runlen -= run;
- while(run--)
- {
- *pixbuf++ = red;
- *pixbuf++ = green;
- *pixbuf++ = blue;
- *pixbuf++ = alpha;
- }
- if (x == image_width)
- {
- // end of line, advance to next
- x = 0;
- y++;
- pixbuf += row_inc;
}
}
}
- else
+ *pixbuf++ = red;
+ *pixbuf++ = green;
+ *pixbuf++ = blue;
+ *pixbuf++ = alpha;
+ x++;
+ if (x == image_width)
{
- // RLE uncompressed run
- runlen = 1 + (runlen & 0x7f);
- while (runlen && y < image_height)
- {
- run = runlen;
- if (run > image_width - x)
- run = image_width - x;
- x += run;
- runlen -= run;
- if (targa_header.pixel_size == 24)
- {
- if (fin + run * 3 > enddata)
- break;
- while(run--)
- {
- *pixbuf++ = fin[2];
- *pixbuf++ = fin[1];
- *pixbuf++ = fin[0];
- *pixbuf++ = 255;
- fin += 3;
- }
- }
- else
- {
- if (fin + run * 4 > enddata)
- break;
- while(run--)
- {
- *pixbuf++ = fin[2];
- *pixbuf++ = fin[1];
- *pixbuf++ = fin[0];
- *pixbuf++ = fin[3];
- fin += 4;
- }
- }
- if (x == image_width)
- {
- // end of line, advance to next
- x = 0;
- y++;
- pixbuf += row_inc;
- }
- }
+ // end of line, advance to next
+ x = 0;
+ y++;
+ pixbuf += row_inc;
}
}
}
+
return image_rgba;
}
projects / xonotic / darkplaces.git / commitdiff