C++ LLImageRaw::resize方法代码示例

//.........这里部分代码省略.........

	/* close the byte stream */
	opj_cio_close(cio);

	/* free remaining structures */
	if(dinfo)
	{
		opj_destroy_decompress(dinfo);
	}

	// The image decode failed if the return was NULL or the component
	// count was zero.  The latter is just a sanity check before we
	// dereference the array.
	if(!image || !image->numcomps)
	{
		LL_DEBUGS("Texture") << "ERROR -> decodeImpl: failed to decode image!" << LL_ENDL;
		if (image)
		{
			opj_image_destroy(image);
		}

		return TRUE; // done
	}

	// sometimes we get bad data out of the cache - check to see if the decode succeeded
	for (S32 i = 0; i < image->numcomps; i++)
	{
		if (image->comps[i].factor != base.getRawDiscardLevel())
		{
			// if we didn't get the discard level we're expecting, fail
			opj_image_destroy(image);
			base.mDecoding = FALSE;
			return TRUE;
		}
	}
	
	if(image->numcomps <= first_channel)
	{
		llwarns << "trying to decode more channels than are present in image: numcomps: " << image->numcomps << " first_channel: " << first_channel << llendl;
		if (image)
		{
			opj_image_destroy(image);
		}
			
		return TRUE;
	}

	// Copy image data into our raw image format (instead of the separate channel format

	S32 img_components = image->numcomps;
	S32 channels = img_components - first_channel;
	if( channels > max_channel_count )
		channels = max_channel_count;

	// Component buffers are allocated in an image width by height buffer.
	// The image placed in that buffer is ceil(width/2^factor) by
	// ceil(height/2^factor) and if the factor isn't zero it will be at the
	// top left of the buffer with black filled in the rest of the pixels.
	// It is integer math so the formula is written in ceildivpo2.
	// (Assuming all the components have the same width, height and
	// factor.)
	S32 comp_width = image->comps[0].w;
	S32 f=image->comps[0].factor;
	S32 width = ceildivpow2(image->x1 - image->x0, f);
	S32 height = ceildivpow2(image->y1 - image->y0, f);
	raw_image.resize(width, height, channels);
	U8 *rawp = raw_image.getData();

	// first_channel is what channel to start copying from
	// dest is what channel to copy to.  first_channel comes from the
	// argument, dest always starts writing at channel zero.
	for (S32 comp = first_channel, dest=0; comp < first_channel + channels;
		comp++, dest++)
	{
		if (image->comps[comp].data)
		{
			S32 offset = dest;
			for (S32 y = (height - 1); y >= 0; y--)
			{
				for (S32 x = 0; x < width; x++)
				{
					rawp[offset] = image->comps[comp].data[y*comp_width + x];
					offset += channels;
				}
			}
		}
		else // Some rare OpenJPEG versions have this bug.
		{
			LL_DEBUGS("Texture") << "ERROR -> decodeImpl: failed to decode image! (NULL comp data - OpenJPEG bug)" << LL_ENDL;
			opj_image_destroy(image);

			return TRUE; // done
		}
	}

	/* free image data structure */
	opj_image_destroy(image);

	return TRUE; // done
}

BOOL LLImageJ2CKDU::initDecode(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, ECodeStreamMode mode, S32 first_channel, S32 max_channel_count, int discard_level, int* region)
{
	base.resetLastError();

	// *FIX: kdu calls our callback function if there's an error, and then bombs.
	// To regain control, we throw an exception, and catch it here.
	try
	{
		// Merov : Test!! DO NOT COMMIT!!
		//findDiscardLevelsBoundaries(base);

		base.updateRawDiscardLevel();
		setupCodeStream(base, TRUE, mode);

		mRawImagep = &raw_image;
		mCodeStreamp->change_appearance(false, true, false);

		// Apply loading discard level and cropping if required
		kdu_dims* region_kdu = NULL;
		if (region != NULL)
		{
			region_kdu = new kdu_dims;
			region_kdu->pos.x  = region[0];
			region_kdu->pos.y  = region[1];
			region_kdu->size.x = region[2] - region[0];
			region_kdu->size.y = region[3] - region[1];
		}
		int discard = (discard_level != -1 ? discard_level : base.getRawDiscardLevel());
		//llinfos << "Merov debug : initDecode, discard used = " << discard << ", asked = " << discard_level << llendl;
		// Apply loading restrictions
		mCodeStreamp->apply_input_restrictions( first_channel, max_channel_count, discard, 0, region_kdu);
		
		// Clean-up
		if (region_kdu)
		{
			delete region_kdu;
			region_kdu = NULL;
		}

		// Resize raw_image according to the image to be decoded
		kdu_dims dims; mCodeStreamp->get_dims(0,dims);
		S32 channels = base.getComponents() - first_channel;
		channels = llmin(channels,max_channel_count);
		raw_image.resize(dims.size.x, dims.size.y, channels);

		if (!mTileIndicesp)
		{
			mTileIndicesp = new kdu_dims;
		}
		mCodeStreamp->get_valid_tiles(*mTileIndicesp);
		if (!mTPosp)
		{
			mTPosp = new kdu_coords;
			mTPosp->y = 0;
			mTPosp->x = 0;
		}
	}
	catch (const char* msg)
	{
		base.setLastError(ll_safe_string(msg));
		return FALSE;
	}
	catch (...)
	{
		base.setLastError("Unknown J2C error");
		return FALSE;
	}

	return TRUE;
}

//.........这里部分代码省略.........
	// count was zero.  The latter is just a sanity check before we
	// dereference the array.
	if(!image || !image->numcomps)
	{
		LL_DEBUGS("Texture") << "ERROR -> decodeImpl: failed to decode image!" << LL_ENDL;
		if (image)
		{
			opj_image_destroy(image);
		}
		base.decodeFailed();
		return TRUE; // done
	}

	// sometimes we get bad data out of the cache - check to see if the decode succeeded
	for (S32 i = 0; i < image->numcomps; i++)
	{
		if (image->comps[i].factor != base.getRawDiscardLevel())
		{
			// if we didn't get the discard level we're expecting, fail
			opj_image_destroy(image);
			base.decodeFailed();
			return TRUE;
		}
	}
	
	if(image->numcomps <= first_channel)
	{
		LL_WARNS("Texture") << "trying to decode more channels than are present in image: numcomps: " << image->numcomps << " first_channel: " << first_channel << LL_ENDL;
		if (image)
		{
			opj_image_destroy(image);
		}

		base.decodeFailed();
		return TRUE;
	}

	// Copy image data into our raw image format (instead of the separate channel format

	S32 img_components = image->numcomps;
	S32 channels = img_components - first_channel;
	if( channels > max_channel_count )
		channels = max_channel_count;

	// Component buffers are allocated in an image width by height buffer.
	// The image placed in that buffer is ceil(width/2^factor) by
	// ceil(height/2^factor) and if the factor isn't zero it will be at the
	// top left of the buffer with black filled in the rest of the pixels.
	// It is integer math so the formula is written in ceildivpo2.
	// (Assuming all the components have the same width, height and
	// factor.)
	S32 comp_width = image->comps[0].w;
	S32 f=image->comps[0].factor;
	S32 width = ceildivpow2(image->x1 - image->x0, f);
	S32 height = ceildivpow2(image->y1 - image->y0, f);
	raw_image.resize(width, height, channels);
	U8 *rawp = raw_image.getData();
	if (!rawp)
	{
		opj_image_destroy(image);
		base.setLastError("Memory error");
		base.decodeFailed();
		return true; // done
	}

	// first_channel is what channel to start copying from
	// dest is what channel to copy to.  first_channel comes from the
	// argument, dest always starts writing at channel zero.
	for (S32 comp = first_channel, dest=0; comp < first_channel + channels;
		comp++, dest++)
	{
		if (image->comps[comp].data)
		{
			S32 offset = dest;
			for (S32 y = (height - 1); y >= 0; y--)
			{
				for (S32 x = 0; x < width; x++)
				{
					rawp[offset] = image->comps[comp].data[y*comp_width + x];
					offset += channels;
				}
			}
		}
		else // Some rare OpenJPEG versions have this bug.
		{
			LL_DEBUGS("Texture") << "ERROR -> decodeImpl: failed to decode image! (NULL comp data - OpenJPEG bug)" << LL_ENDL;
			if (image)
			{
				opj_image_destroy(image);
			}
			base.decodeFailed();
			return TRUE; // done
		}
	}

	/* free image data structure */
	opj_image_destroy(image);

	return TRUE; // done
}

//.........这里部分代码省略.........
			decompdifference = llmax(decompdifference, cinfo.numdecompos[comp] - image->comps[comp].resno_decoded);
		}
		if (decompdifference < 0) // sanity
		{
			decompdifference = 0;
		}
	}
	

	/* if OpenJPEG failed to decode all requested decomposition levels
	   the difference will be greater than this level */
	if (decompdifference > base.getRawDiscardLevel())
	{
		LL_WARNS("Openjpeg") << "Not enough data for requested discard level " << (S32)base.getRawDiscardLevel() << ", difference: " << (decompdifference - base.getRawDiscardLevel()) << llendl;
		opj_destroy_cstr_info(&cinfo);
		opj_image_destroy(image);
		if (base.getRawDiscardLevel() == 0)
		{
			base.decodeFailed();
		}
		return TRUE;
	}

	if(img_components <= first_channel)
	{
		LL_WARNS("Openjpeg") << "Trying to decode more channels than are present in image, numcomps: " << img_components << " first_channel: " << first_channel << LL_ENDL;
		if (image)
		{
			opj_destroy_cstr_info(&cinfo);
			opj_image_destroy(image);
		}
		if (base.getRawDiscardLevel() == 0)
		{
			base.decodeFailed();
		}
		return TRUE;
	}

	// Copy image data into our raw image format (instead of the separate channel format


	S32 channels = img_components - first_channel;
	if( channels > max_channel_count )
		channels = max_channel_count;

	// Component buffers are allocated in an image width by height buffer.
	// The image placed in that buffer is ceil(width/2^factor) by
	// ceil(height/2^factor) and if the factor isn't zero it will be at the
	// top left of the buffer with black filled in the rest of the pixels.
	// It is integer math so the formula is written in ceildivpo2.
	// (Assuming all the components have the same width, height and
	// factor.)
	S32 comp_width = image->comps[0].w;
	S32 f=image->comps[0].factor;
	S32 width = ceildivpow2(image->x1 - image->x0, f);
	S32 height = ceildivpow2(image->y1 - image->y0, f);
	raw_image.resize(width, height, channels);
	U8 *rawp = raw_image.getData();

	// first_channel is what channel to start copying from
	// dest is what channel to copy to.  first_channel comes from the
	// argument, dest always starts writing at channel zero.
	for (S32 comp = first_channel, dest=0; comp < first_channel + channels;
		comp++, dest++)
	{
		if (image->comps[comp].data)
		{
			S32 offset = dest;
			for (S32 y = (height - 1); y >= 0; y--)
			{
				for (S32 x = 0; x < width; x++)
				{
					rawp[offset] = image->comps[comp].data[y*comp_width + x];
					offset += channels;
				}
			}
		}
		else // Some rare OpenJPEG versions have this bug.
		{
			LL_WARNS("Openjpeg") << "Failed to decode image! (NULL comp data - OpenJPEG bug)" << LL_ENDL;
			opj_destroy_cstr_info(&cinfo);
			opj_image_destroy(image);

			if (base.getRawDiscardLevel() == 0)
			{
				base.decodeFailed();
			}
			return TRUE; // done
		}
	}

	/* free opj data structures */
	if (image)
	{
		opj_destroy_cstr_info(&cinfo);
		opj_image_destroy(image);
	}
	
	return TRUE; // done
}