#ifdef WITH_DEVIL
#include <IL/il.h>
#endif
-#ifdef WITH_LIBPNG
-#include <png.h>
#include <msp/io/file.h>
#include <msp/io/memory.h>
-#endif
#include "image.h"
+#include "image_devil.h"
+#include "image_png.h"
+#include "image_private.h"
using namespace std;
namespace Msp {
namespace Graphics {
-struct Image::Private
-{
-#ifdef WITH_DEVIL
- unsigned id;
-#endif
-#ifdef WITH_LIBPNG
- PixelFormat fmt;
- unsigned width;
- unsigned height;
- char *data;
-#endif
-
- Private();
-};
-
Image::Private::Private()
{
#ifdef WITH_DEVIL
id = 0;
#endif
-#ifdef WITH_LIBPNG
fmt = RGB;
width = 0;
height = 0;
data = 0;
-#endif
-}
-
-
-namespace {
-
-#ifdef WITH_LIBPNG
-void read(png_struct *png, png_byte *data, png_size_t size)
-{
- IO::Base *in = reinterpret_cast<IO::Base *>(png_get_io_ptr(png));
- in->read(reinterpret_cast<char *>(data), size);
-}
-
-void load_png(IO::Base &in, Image::Private &priv)
-{
- png_struct *png = 0;
- png_info *info = 0;
- priv.data = 0;
-
- try
- {
- png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
- info = png_create_info_struct(png);
-
- if(setjmp(png_jmpbuf(png)))
- throw bad_image_data("PNG error");
-
- png_set_read_fn(png, &in, read);
- png_read_info(png, info);
- png_uint_32 width;
- png_uint_32 height;
- int depth;
- int color;
- png_get_IHDR(png, info, &width, &height, &depth, &color, 0, 0, 0);
- priv.width = width;
- priv.height = height;
- if(depth!=8)
- throw unsupported_image_format("depth!=8");
- switch(color)
- {
- case PNG_COLOR_TYPE_PALETTE: priv.fmt = COLOR_INDEX; break;
- case PNG_COLOR_TYPE_GRAY: priv.fmt = LUMINANCE; break;
- case PNG_COLOR_TYPE_GRAY_ALPHA: priv.fmt = LUMINANCE_ALPHA; break;
- case PNG_COLOR_TYPE_RGB: priv.fmt = RGB; break;
- case PNG_COLOR_TYPE_RGB_ALPHA: priv.fmt = RGBA; break;
- default: throw unsupported_image_format("unknown color type");
- }
-
- unsigned nchans = png_get_channels(png, info);
- if(nchans==4 && priv.fmt==RGB)
- png_set_strip_alpha(png);
-
- unsigned rowstride = priv.width*nchans;
- priv.data = new char[rowstride*priv.height];
- for(unsigned y=0; y<priv.height; ++y)
- png_read_row(png, reinterpret_cast<png_byte *>(priv.data+rowstride*(priv.height-1-y)), 0);
-
- png_read_end(png, 0);
- png_destroy_read_struct(&png, &info, 0);
- }
- catch(...)
- {
- png_destroy_read_struct(&png, &info, 0);
- delete[] priv.data;
- throw;
- }
-}
-#endif
-
-#ifdef WITH_DEVIL
-void ensure_devil_image(unsigned &id)
-{
- static bool init_done = false;
-
- if(!init_done)
- {
- ilInit();
- ilEnable(IL_ORIGIN_SET);
- ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
- init_done = true;
- }
-
- if(!id)
- ilGenImages(1, &id);
-}
-#endif
-
}
#ifdef WITH_DEVIL
if(priv->id)
ilDeleteImages(1, &priv->id);
+ else
#endif
-#ifdef WITH_LIBPNG
delete[] priv->data;
-#endif
delete priv;
}
#endif
{
#ifdef WITH_DEVIL
- ensure_devil_image(priv->id);
- ilBindImage(priv->id);
- if(!ilLoadImage(const_cast<char *>(fn.c_str())))
- throw bad_image_data("IL error");
+ load_devil_file(fn, *priv);
#else
throw unsupported_image_format("DevIL needed for non-PNG images");
#endif
void Image::load_memory(const void *data, unsigned size)
{
#ifdef WITH_LIBPNG
- if(!png_sig_cmp(reinterpret_cast<png_byte *>(const_cast<void *>(data)), 0, 8))
+ if(size>=8 && is_png(data, 8))
{
IO::Memory mem(reinterpret_cast<const char *>(data), size);
load_png(mem, *priv);
#endif
{
#ifdef WITH_DEVIL
- ensure_devil_image(priv->id);
- ilBindImage(priv->id);
- if(!ilLoadL(IL_TYPE_UNKNOWN, const_cast<void *>(data), size))
- throw bad_image_data("IL error");
+ load_devil_mem(data, size, *priv);
#else
throw unsupported_image_format("DevIL needed for non-PNG images");
#endif
PixelFormat Image::get_format() const
{
-#ifdef WITH_LIBPNG
- if(priv->data)
- return priv->fmt;
-#endif
-#ifdef WITH_DEVIL
- if(priv->id)
- {
- ilBindImage(priv->id);
- switch(ilGetInteger(IL_IMAGE_FORMAT))
- {
- case IL_COLOR_INDEX: return COLOR_INDEX;
- case IL_LUMINANCE: return LUMINANCE;
- case IL_LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
- case IL_RGB: return RGB;
- case IL_RGBA: return RGBA;
- case IL_BGR: return BGR;
- case IL_BGRA: return BGRA;
- // XXX bad, should throw when loading
- default: throw invalid_argument("unknown pixel format in image");
- }
- }
-#endif
- return RGB;
+ return priv->fmt;
}
unsigned Image::get_width() const
{
-#ifdef WITH_LIBPNG
- if(priv->data)
- return priv->width;
-#endif
-#ifdef WITH_DEVIL
- if(priv->id)
- {
- ilBindImage(priv->id);
- return ilGetInteger(IL_IMAGE_WIDTH);
- }
-#endif
- return 0;
+ return priv->width;
}
unsigned Image::get_height() const
{
-#ifdef WITH_LIBPNG
- if(priv->data)
- return priv->height;
-#endif
-#ifdef WITH_DEVIL
- if(priv->id)
- {
- ilBindImage(priv->id);
- return ilGetInteger(IL_IMAGE_HEIGHT);
- }
-#endif
- return 0;
+ return priv->height;
}
const void *Image::get_data() const
{
-#ifdef WITH_LIBPNG
- if(priv->data)
- return priv->data;
-#endif
-#ifdef WITH_DEVIL
- if(priv->id)
- {
- ilBindImage(priv->id);
- return ilGetData();
- }
-#endif
- return 0;
+ return priv->data;
}
} // namespace Graphics
projects / libs / gui.git / blobdiff