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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Display/display_precomp.h"
#include <errno.h>
#include <stdio.h>
#include <iostream>
#include "API/Core/System/error.h"
#include "API/Display/Providers/png_provider.h"
#include "png_provider_generic.h"
/////////////////////////////////////////////////////////////////////////////
// CL_PNGProvider construction:
CL_PNGProvider::CL_PNGProvider(
const std::string &name,
CL_InputSourceProvider *provider)
: CL_PixelBuffer(
new CL_PNGProvider_Generic(
name,
provider))
{
}
void
CL_PNGProvider::save(
CL_PixelBuffer buffer,
const std::string &filename,
CL_OutputSourceProvider *output_provider)
{
if (output_provider)
throw CL_Error("Saving to OutputSource currently not supported");
buffer.lock();
if (buffer.get_format() != CL_PixelFormat::abgr8888)
{
CL_PixelBuffer newbuf(buffer.get_width(), buffer.get_height(),
buffer.get_width()*4, CL_PixelFormat::abgr8888);
buffer.unlock();
buffer.convert(newbuf);
buffer = newbuf;
buffer.lock();
}
FILE* fp;
fp = fopen(filename.c_str (), "wb");
if (fp == NULL)
throw CL_Error(strerror(errno));
png_structp png_ptr;
png_infop info_ptr;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info_ptr = png_create_info_struct(png_ptr);
png_init_io(png_ptr, fp);
png_set_IHDR(png_ptr, info_ptr,
buffer.get_width(), buffer.get_height(), 8 /* bitdepth */,
PNG_COLOR_TYPE_RGBA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
png_uint_32 height = buffer.get_height();
png_uint_32 row_bytes = buffer.get_width()*4;
png_byte* image = new png_byte[height * row_bytes];
png_bytep* row_pointers = new png_bytep[height];
// fill the image with data
for (int i = 0; i < buffer.get_width()*buffer.get_height()*4; ++i)
image[i] = static_cast<unsigned char*>(buffer.get_data())[i];
// generate row pointers
for (unsigned int k = 0; k < height; k++)
row_pointers[k] = image + (k * row_bytes);
png_write_image(png_ptr, row_pointers);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct( &png_ptr, &info_ptr );
delete[] image;
delete[] row_pointers;
fclose(fp);
buffer.unlock();
}
/* EOF */
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