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Add jpeg bgra support

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This commit is contained in:
Magnus Norddahl 2016-06-10 15:56:50 +02:00
parent 24f846f702
commit 6c70eaea2f
1 changed files with 111 additions and 5 deletions
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112
src/textures/jpegtexture.cpp
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@ -187,6 +187,7 @@ public:
const BYTE *GetColumn (unsigned int column, const Span **spans_out);
const BYTE *GetPixels ();
const uint32_t *GetPixelsBgra ();
void Unload ();
FTextureFormat GetFormat ();
int CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rotate, FCopyInfo *inf = NULL);
@ -195,9 +196,11 @@ public:
protected:
BYTE *Pixels;
std::vector<uint32_t> PixelsBgra;
Span DummySpans[2];
void MakeTexture ();
void MakeTextureBgra ();
friend class FTexture;
};
@ -295,11 +298,9 @@ FJPEGTexture::~FJPEGTexture ()
void FJPEGTexture::Unload ()
{
if (Pixels != NULL)
{
delete[] Pixels;
Pixels = NULL;
}
PixelsBgra.clear();
}
//==========================================================================
@ -358,6 +359,15 @@ const BYTE *FJPEGTexture::GetPixels ()
return Pixels;
}
const uint32_t *FJPEGTexture::GetPixelsBgra()
{
if (PixelsBgra.empty())
{
MakeTextureBgra();
}
return PixelsBgra.data();
}
//==========================================================================
//
//
@ -457,6 +467,102 @@ void FJPEGTexture::MakeTexture ()
}
}
void FJPEGTexture::MakeTextureBgra()
{
FWadLump lump = Wads.OpenLumpNum(SourceLump);
JSAMPLE *buff = NULL;
jpeg_decompress_struct cinfo;
jpeg_error_mgr jerr;
PixelsBgra.resize(Width * Height, 0xffba0000);
cinfo.err = jpeg_std_error(&jerr);
cinfo.err->output_message = JPEG_OutputMessage;
cinfo.err->error_exit = JPEG_ErrorExit;
jpeg_create_decompress(&cinfo);
try
{
FLumpSourceMgr sourcemgr(&lump, &cinfo);
jpeg_read_header(&cinfo, TRUE);
if (!((cinfo.out_color_space == JCS_RGB && cinfo.num_components == 3) ||
(cinfo.out_color_space == JCS_CMYK && cinfo.num_components == 4) ||
(cinfo.out_color_space == JCS_GRAYSCALE && cinfo.num_components == 1)))
{
Printf(TEXTCOLOR_ORANGE "Unsupported color format\n");
throw - 1;
}
jpeg_start_decompress(&cinfo);
int y = 0;
buff = new BYTE[cinfo.output_width * cinfo.output_components];
while (cinfo.output_scanline < cinfo.output_height)
{
int num_scanlines = jpeg_read_scanlines(&cinfo, &buff, 1);
BYTE *in = buff;
uint32_t *out = PixelsBgra.data() + y;
switch (cinfo.out_color_space)
{
case JCS_RGB:
for (int x = Width; x > 0; --x)
{
uint32_t r = in[0];
uint32_t g = in[1];
uint32_t b = in[2];
*out = 0xff000000 | (r << 16) | (g << 8) | b;
out += Height;
in += 3;
}
break;
case JCS_GRAYSCALE:
for (int x = Width; x > 0; --x)
{
uint32_t gray = in[0];
*out = 0xff000000 | (gray << 16) | (gray << 8) | gray;
out += Height;
in += 1;
}
break;
case JCS_CMYK:
// What are you doing using a CMYK image? :)
for (int x = Width; x > 0; --x)
{
// To be precise, these calculations should use 255, but
// 256 is much faster and virtually indistinguishable.
uint32_t r = in[3] - (((256 - in[0])*in[3]) >> 8);
uint32_t g = in[3] - (((256 - in[1])*in[3]) >> 8);
uint32_t b = in[3] - (((256 - in[2])*in[3]) >> 8);
*out = 0xff000000 | (r << 16) | (g << 8) | b;
out += Height;
in += 4;
}
break;
default:
// The other colorspaces were considered above and discarded,
// but GCC will complain without a default for them here.
break;
}
y++;
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
}
catch (int)
{
Printf(TEXTCOLOR_ORANGE " in texture %s\n", Name.GetChars());
jpeg_destroy_decompress(&cinfo);
}
if (buff != NULL)
{
delete[] buff;
}
}
//===========================================================================
//