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Fix up our new png bug. Attempt to save a little memory with greyscale pngs.

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5864 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2021-05-20 12:29:31 +00:00
parent fcbbfc223d
commit f73e1b7ffc
1 changed files with 34 additions and 8 deletions
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42
engine/client/image.c
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@ -1371,6 +1371,7 @@ static void (PNGAPI *qpng_set_palette_to_rgb) PNGARG((png_structp png_ptr)) PSTA
static png_uint_32 (PNGAPI *qpng_get_IHDR) PNGARG((png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height,
int *bit_depth, int *color_type, int *interlace_method, int *compression_method, int *filter_method)) PSTATIC(png_get_IHDR);
static png_uint_32 (PNGAPI *qpng_get_PLTE) PNGARG((png_const_structrp png_ptr, png_inforp info_ptr, png_colorp *palette, int *num_palette)) PSTATIC(png_get_PLTE);
static png_uint_32 (PNGAPI *qpng_get_tRNS) PNGARG((png_const_structrp png_ptr, png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)) PSTATIC(png_get_tRNS);
static void (PNGAPI *qpng_read_info) PNGARG((png_structp png_ptr, png_infop info_ptr)) PSTATIC(png_read_info);
static void (PNGAPI *qpng_set_sig_bytes) PNGARG((png_structp png_ptr, int num_bytes)) PSTATIC(png_set_sig_bytes);
@ -1427,6 +1428,7 @@ qboolean LibPNG_Init(void)
{(void **) &qpng_set_palette_to_rgb, "png_set_palette_to_rgb"},
{(void **) &qpng_get_IHDR, "png_get_IHDR"},
{(void **) &qpng_get_PLTE, "png_get_PLTE"},
{(void **) &qpng_get_tRNS, "png_get_tRNS"},
{(void **) &qpng_read_info, "png_read_info"},
{(void **) &qpng_set_sig_bytes, "png_set_sig_bytes"},
{(void **) &qpng_set_read_fn, "png_set_read_fn"},
@ -1598,10 +1600,14 @@ error:
if (colortype == PNG_COLOR_TYPE_PALETTE)
{
int numpal = 0;
int numpal = 0, numtrans = 0;
png_colorp pal = NULL;
png_bytep trans = NULL;
if (bitdepth==8 && format)
{
qpng_get_tRNS(png, pnginfo, &trans, &numtrans, NULL);
qpng_get_PLTE(png, pnginfo, &pal, &numpal);
}
if (numpal == 256)
{
for (numpal = 0; numpal < 256; numpal++)
@ -1609,13 +1615,17 @@ error:
if (pal[numpal].red == host_basepal[numpal*3+0] &&
pal[numpal].green == host_basepal[numpal*3+1] &&
pal[numpal].blue == host_basepal[numpal*3+2])
{
if (numpal < numtrans && trans[numpal] != 255)
break; //we require it to be fully opaque, because our PTI_P8 has no transparency info(nor does quake) and we don't want to make assumptions here.
continue;
}
else
break; //bum
}
}
if (numpal != 256)
{
{ //the palette isn't ours. give up and just treat it as rgb(a)
qpng_set_palette_to_rgb(png);
qpng_set_filler(png, ~0u, PNG_FILLER_AFTER);
colortype = PNG_COLOR_TYPE_RGB;
@ -1631,21 +1641,31 @@ error:
#endif
}
if (qpng_get_valid( png, pnginfo, PNG_INFO_tRNS))
if (colortype != PNG_COLOR_TYPE_PALETTE && qpng_get_valid( png, pnginfo, PNG_INFO_tRNS))
{
qpng_set_tRNS_to_alpha(png);
//for these types, the trns lump specifies a specific colour to treat as transparent.
//make sure our resulting format reflects it.
if (colortype == PNG_COLOR_TYPE_GRAY)
colortype = PNG_COLOR_TYPE_GRAY_ALPHA;
else if (colortype == PNG_COLOR_TYPE_RGB)
colortype = PNG_COLOR_TYPE_RGB_ALPHA;
}
if (bitdepth >= 8 && colortype == PNG_COLOR_TYPE_RGB)
qpng_set_filler(png, ~0u, PNG_FILLER_AFTER);
if (colortype == PNG_COLOR_TYPE_GRAY || colortype == PNG_COLOR_TYPE_GRAY_ALPHA)
{ //FIXME: skip this if !format
//expand greyscale to rgb when we're forcing 32bit output (with padding, as appropriate).
if ((colortype == PNG_COLOR_TYPE_GRAY || colortype == PNG_COLOR_TYPE_GRAY_ALPHA)&&!format)
{
qpng_set_gray_to_rgb( png );
qpng_set_filler(png, ~0u, PNG_FILLER_AFTER);
if (colortype == PNG_COLOR_TYPE_GRAY)
qpng_set_filler(png, ~0u, PNG_FILLER_AFTER);
}
if (bitdepth < 8)
qpng_set_expand (png);
else if (bitdepth == 16 && !format)
else if (bitdepth == 16 && (!format || colortype!=PNG_COLOR_TYPE_RGB_ALPHA))
qpng_set_strip_16(png);
else if (bitdepth == 16)
qpng_set_swap(png);
@ -1657,6 +1677,12 @@ error:
if (colortype == PNG_COLOR_TYPE_PALETTE)
*format = PTI_P8;
else if (bitdepth == 8 && channels == 1 && format)
*format = PTI_L8;
else if (bitdepth == 8 && channels == 2 && format)
*format = (colortype == PNG_COLOR_TYPE_GRAY_ALPHA)?PTI_L8A8:PTI_RG8;
else if (bitdepth == 8 && channels == 3 && format)
*format = PTI_RGB8;
else if (bitdepth == 8 && channels == 4)
{
if (format)
@ -1671,7 +1697,7 @@ error:
*format = PTI_RGBA8;
}
}
else if (bitdepth == 16 && channels == 4)
else if (bitdepth == 16 && channels == 4 && format)
*format = PTI_RGBA16;
else
{