Initial commit.

.gitignore

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+*.o
+/Makefile
+/Makefile.in
+/aclocal.m4
+/autom4te.cache/
+/build-aux/
+/config.cache
+/config.h
+/config.h.in
+/config.log
+/config.status
+/configure
+/stamp-h1
+/pixels2pgf

COPYING

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+Copyright (c) 2012, Michał Górny
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

Makefile.am

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+bin_PROGRAMS = pixels2pgf
+
+pixels2pgf_SOURCES = src/pixels2pgf.c
+pixels2pgf_CPPFLAGS = $(SDL_CFLAGS)
+pixels2pgf_LDADD = $(SDL_LIBS)

configure.ac

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+AC_PREREQ([2.60])
+AC_INIT([pixels2pgf], [0])
+AC_CONFIG_AUX_DIR([build-aux])
+AM_INIT_AUTOMAKE([1.6 foreign dist-bzip2 no-dependencies])
+
+PKG_CHECK_MODULES([SDL], [sdl SDL_image])
+
+AC_PROG_CC
+
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT

src/pixels2pgf.c

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+/* pixels2pgf -- pixel-exact image to PGF converter
+ * (c) 2012 Michał Górny
+ * Released under the terms of the 2-clause BSD license
+ */
+
+#include <stdio.h>
+
+#include <SDL.h>
+#include <SDL_image.h>
+
+void output_pgf(unsigned char* pixels, int width, int height, int pitch)
+{
+	int y, x;
+
+	for (y = 0; y < height; ++y)
+	{
+		for (x = 0; x < width; ++x)
+		{
+			unsigned char pixel = pixels[y * pitch + x];
+
+			if (!(pixel & 0xBF))
+				printf("\\filldraw (%d, -%d) rectangle ++(1, -1);\n", x, y);
+		}
+	}
+}
+
+int process(SDL_Surface* input)
+{
+	SDL_PixelFormat nicepf = {
+		NULL,
+		8, 1,
+		0, 2, 4, 6,
+		6, 6, 6, 6,
+		0x03, 0x0C, 0x30, 0xC0,
+		0xC0, 0
+	};
+
+	SDL_Surface* image;
+
+	if (!input)
+	{
+		fprintf(stderr, "Failed to load image: %s\n", IMG_GetError());
+		return 1;
+	}
+
+	/* Convert to a nicer format. */
+	image = SDL_ConvertSurface(input, &nicepf, SDL_SWSURFACE);
+	SDL_FreeSurface(input);
+
+	if (!image)
+	{
+		fprintf(stderr, "Unable to convert image: %s\n",
+				SDL_GetError());
+		return 1;
+	}
+
+	output_pgf(image->pixels, image->w, image->h, image->pitch);
+
+	SDL_FreeSurface(image);
+	return 0;
+}
+
+int main(int argc, char* argv[])
+{
+	int ret;
+
+	if (argc != 2)
+	{
+		fprintf(stderr, "Usage: %s <file>\n", argv[0]);
+		return 1;
+	}
+
+	if (SDL_Init(0))
+	{
+		fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
+		return 1;
+	}
+	IMG_Init(0);
+
+	ret = process(IMG_Load(argv[1]));
+
+	IMG_Quit();
+	SDL_Quit();
+
+	return ret;
+}