[pcsx_rearmed.git] / frontend / common / readpng.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2008-2011
 *
 * This work is licensed under the terms of any of these licenses
 * (at your option):
 *  - GNU GPL, version 2 or later.
 *  - GNU LGPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <png.h>
#include "readpng.h"
#include "lprintf.h"

int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req_h)
{
	FILE *fp;
	png_structp png_ptr = NULL;
	png_infop info_ptr = NULL;
	png_bytepp row_ptr = NULL;
	int ret = -1;

	if (dest == NULL || fname == NULL)
	{
		return -1;
	}

	fp = fopen(fname, "rb");
	if (fp == NULL)
	{
		lprintf(__FILE__ ": failed to open: %s\n", fname);
		return -1;
	}

	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
	if (!png_ptr)
	{
		lprintf(__FILE__ ": png_create_read_struct() failed\n");
		fclose(fp);
		return -1;
	}

	info_ptr = png_create_info_struct(png_ptr);
	if (!info_ptr)
	{
		lprintf(__FILE__ ": png_create_info_struct() failed\n");
		goto done;
	}

	// Start reading
	png_init_io(png_ptr, fp);
	png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_STRIP_ALPHA | PNG_TRANSFORM_PACKING, NULL);
	row_ptr = png_get_rows(png_ptr, info_ptr);
	if (row_ptr == NULL)
	{
		lprintf(__FILE__ ": png_get_rows() failed\n");
		goto done;
	}

	// lprintf("%s: %ix%i @ %ibpp\n", fname, (int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), png_get_bit_depth(png_ptr, info_ptr));

	switch (what)
	{
		case READPNG_BG:
		{
			int height, width, h;
			unsigned short *dst = dest;
			if (png_get_bit_depth(png_ptr, info_ptr) != 8)
			{
				lprintf(__FILE__ ": bg image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
				break;
			}
			height = png_get_image_width(png_ptr, info_ptr);
			if (height > req_h)
				height = req_h;
			width = png_get_image_height(png_ptr, info_ptr);
			if (width > req_w)
				width = req_w;

			for (h = 0; h < height; h++)
			{
				unsigned char *src = row_ptr[h];
				int len = width;
				while (len--)
				{
#ifdef PSP
					*dst++ = ((src[2]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[0] >> 3); // BGR
#else
					*dst++ = ((src[0]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[2] >> 3); // RGB
#endif
					src += 3;
				}
				dst += req_w - width;
			}
			break;
		}

		case READPNG_FONT:
		{
			int x, y, x1, y1;
			unsigned char *dst = dest;
			if (png_get_image_width(png_ptr, info_ptr) != req_w || png_get_image_height(png_ptr, info_ptr) != req_h)
			{
				lprintf(__FILE__ ": unexpected font image size %dx%d, needed %dx%d\n",
					(int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
				break;
			}
			if (png_get_bit_depth(png_ptr, info_ptr) != 8)
			{
				lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
				break;
			}
			for (y = 0; y < 16; y++)
			{
				for (x = 0; x < 16; x++)
				{
					/* 16x16 grid of syms */
					int sym_w = req_w / 16;
					int sym_h = req_h / 16;
					for (y1 = 0; y1 < sym_h; y1++)
					{
						unsigned char *src = row_ptr[y*sym_h + y1] + x*sym_w;
						for (x1 = sym_w/2; x1 > 0; x1--, src+=2)
							*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
					}
				}
			}
			break;
		}

		case READPNG_SELECTOR:
		{
			int x1, y1;
			unsigned char *dst = dest;
			if (png_get_image_width(png_ptr, info_ptr) != req_w || png_get_image_height(png_ptr, info_ptr) != req_h)
			{
				lprintf(__FILE__ ": unexpected selector image size %ix%i, needed %dx%d\n",
					(int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
				break;
			}
			if (png_get_bit_depth(png_ptr, info_ptr) != 8)
			{
				lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
				break;
			}
			for (y1 = 0; y1 < req_h; y1++)
			{
				unsigned char *src = row_ptr[y1];
				for (x1 = req_w/2; x1 > 0; x1--, src+=2)
					*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
			}
			break;
		}

		case READPNG_24:
		{
			int height, width, h;
			unsigned char *dst = dest;
			if (png_get_bit_depth(png_ptr, info_ptr) != 8)
			{
				lprintf(__FILE__ ": image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
				break;
			}
			height = png_get_image_height(png_ptr, info_ptr);
			if (height > req_h)
				height = req_h;
			width = png_get_image_width(png_ptr, info_ptr);
			if (width > req_w)
				width = req_w;

			for (h = 0; h < height; h++)
			{
				int len = width;
				unsigned char *src = row_ptr[h];
				dst += (req_w - width) * 3;
				for (len = width; len > 0; len--, dst+=3, src+=3)
					dst[0] = src[2], dst[1] = src[1], dst[2] = src[0];
			}
			break;
		}
	}


	ret = 0;
done:
	png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, (png_infopp)NULL);
	fclose(fp);
	return ret;
}

int writepng(const char *fname, unsigned short *src, int w, int h)
{
	png_structp png_ptr = NULL;
	png_infop info_ptr = NULL;
	png_bytepp row_pointers;
	int i, j, ret = -1;
	FILE *f;

	f = fopen(fname, "wb");
	if (f == NULL) {
		lprintf(__FILE__ ": failed to open \"%s\"\n", fname);
		return -1;
	}

	row_pointers = calloc(h, sizeof(row_pointers[0]));
	if (row_pointers == NULL)
		goto end1;

	for (i = 0; i < h; i++) {
		unsigned char *dst = malloc(w * 3);
		if (dst == NULL)
			goto end2;
		row_pointers[i] = dst;
		for (j = 0; j < w; j++, src++, dst += 3) {
			dst[0] = (*src & 0xf800) >> 8;
			dst[1] = (*src & 0x07e0) >> 3;
			dst[2] = (*src & 0x001f) << 3;
		}
	}

	/* initialize stuff */
	png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
	if (png_ptr == NULL) {
		fprintf(stderr, "png_create_write_struct() failed");
		goto end2;
	}

	info_ptr = png_create_info_struct(png_ptr);
	if (info_ptr == NULL) {
		fprintf(stderr, "png_create_info_struct() failed");
		goto end3;
	}

	if (setjmp(png_jmpbuf(png_ptr)) != 0) {
		fprintf(stderr, "error in png code\n");
		goto end4;
	}

	png_init_io(png_ptr, f);

	png_set_IHDR(png_ptr, info_ptr, w, h,
		8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
		PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);

	png_write_info(png_ptr, info_ptr);
	png_write_image(png_ptr, row_pointers);
	png_write_end(png_ptr, NULL);

	ret = 0;

end4:
//	png_destroy_info_struct(png_ptr, &info_ptr); // freed below
end3:
	png_destroy_write_struct(&png_ptr, &info_ptr);
end2:
	for (i = 0; i < h; i++)
		free(row_pointers[i]);
	free(row_pointers);
end1:
	fclose(f);
	return ret;
}
Commit	Line	Data
698517be	1	/*
29a8c4f3	2	* (C) Gražvydas "notaz" Ignotas, 2008-2011
698517be	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
	8	* See the COPYING file in the top-level directory.
	9	*/
	10
	11	#include <stdio.h>
29a8c4f3	12	#include <stdlib.h>
698517be	13	#include <string.h>
	14	#include <png.h>
	15	#include "readpng.h"
	16	#include "lprintf.h"
	17
	18	int readpng(void dest, const char fname, readpng_what what, int req_w, int req_h)
	19	{
	20	FILE *fp;
	21	png_structp png_ptr = NULL;
	22	png_infop info_ptr = NULL;
	23	png_bytepp row_ptr = NULL;
	24	int ret = -1;
	25
	26	if (dest == NULL \|\| fname == NULL)
	27	{
	28	return -1;
	29	}
	30
	31	fp = fopen(fname, "rb");
	32	if (fp == NULL)
	33	{
	34	lprintf(__FILE__ ": failed to open: %s\n", fname);
	35	return -1;
	36	}
	37
	38	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
	39	if (!png_ptr)
	40	{
	41	lprintf(__FILE__ ": png_create_read_struct() failed\n");
	42	fclose(fp);
	43	return -1;
	44	}
	45
	46	info_ptr = png_create_info_struct(png_ptr);
	47	if (!info_ptr)
	48	{
	49	lprintf(__FILE__ ": png_create_info_struct() failed\n");
	50	goto done;
	51	}
	52
	53	// Start reading
	54	png_init_io(png_ptr, fp);
	55	png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 \| PNG_TRANSFORM_STRIP_ALPHA \| PNG_TRANSFORM_PACKING, NULL);
	56	row_ptr = png_get_rows(png_ptr, info_ptr);
	57	if (row_ptr == NULL)
	58	{
	59	lprintf(__FILE__ ": png_get_rows() failed\n");
	60	goto done;
	61	}
	62
791f6e3e	63	// lprintf("%s: %ix%i @ %ibpp\n", fname, (int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), png_get_bit_depth(png_ptr, info_ptr));
698517be	64
	65	switch (what)
	66	{
	67	case READPNG_BG:
	68	{
	69	int height, width, h;
	70	unsigned short *dst = dest;
791f6e3e	71	if (png_get_bit_depth(png_ptr, info_ptr) != 8)
698517be	72	{
791f6e3e	73	lprintf(__FILE__ ": bg image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
698517be	74	break;
698517be	75	}
791f6e3e	76	height = png_get_image_width(png_ptr, info_ptr);
698517be	77	if (height > req_h)
698517be	78	height = req_h;
791f6e3e	79	width = png_get_image_height(png_ptr, info_ptr);
698517be	80	if (width > req_w)
	81	width = req_w;
	82
	83	for (h = 0; h < height; h++)
	84	{
	85	unsigned char *src = row_ptr[h];
	86	int len = width;
	87	while (len--)
	88	{
	89	#ifdef PSP
	90	*dst++ = ((src[2]&0xf8)<<8) \| ((src[1]&0xf8)<<3) \| (src[0] >> 3); // BGR
	91	#else
	92	*dst++ = ((src[0]&0xf8)<<8) \| ((src[1]&0xf8)<<3) \| (src[2] >> 3); // RGB
	93	#endif
	94	src += 3;
	95	}
	96	dst += req_w - width;
	97	}
	98	break;
	99	}
	100
	101	case READPNG_FONT:
	102	{
	103	int x, y, x1, y1;
	104	unsigned char *dst = dest;
791f6e3e	105	if (png_get_image_width(png_ptr, info_ptr) != req_w \|\| png_get_image_height(png_ptr, info_ptr) != req_h)
698517be	106	{
698517be	107	lprintf(__FILE__ ": unexpected font image size %dx%d, needed %dx%d\n",
791f6e3e	108	(int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
698517be	109	break;
698517be	110	}
791f6e3e	111	if (png_get_bit_depth(png_ptr, info_ptr) != 8)
698517be	112	{
791f6e3e	113	lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
698517be	114	break;
	115	}
	116	for (y = 0; y < 16; y++)
	117	{
	118	for (x = 0; x < 16; x++)
	119	{
	120	/* 16x16 grid of syms */
	121	int sym_w = req_w / 16;
	122	int sym_h = req_h / 16;
	123	for (y1 = 0; y1 < sym_h; y1++)
	124	{
	125	unsigned char src = row_ptr[ysym_h + y1] + x*sym_w;
	126	for (x1 = sym_w/2; x1 > 0; x1--, src+=2)
	127	*dst++ = ((src[0]^0xff) & 0xf0) \| ((src[1]^0xff) >> 4);
	128	}
	129	}
	130	}
	131	break;
	132	}
	133
	134	case READPNG_SELECTOR:
	135	{
	136	int x1, y1;
	137	unsigned char *dst = dest;
791f6e3e	138	if (png_get_image_width(png_ptr, info_ptr) != req_w \|\| png_get_image_height(png_ptr, info_ptr) != req_h)
698517be	139	{
698517be	140	lprintf(__FILE__ ": unexpected selector image size %ix%i, needed %dx%d\n",
791f6e3e	141	(int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
698517be	142	break;
698517be	143	}
791f6e3e	144	if (png_get_bit_depth(png_ptr, info_ptr) != 8)
698517be	145	{
791f6e3e	146	lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
698517be	147	break;
	148	}
	149	for (y1 = 0; y1 < req_h; y1++)
	150	{
	151	unsigned char *src = row_ptr[y1];
	152	for (x1 = req_w/2; x1 > 0; x1--, src+=2)
	153	*dst++ = ((src[0]^0xff) & 0xf0) \| ((src[1]^0xff) >> 4);
	154	}
	155	break;
	156	}
	157
	158	case READPNG_24:
	159	{
	160	int height, width, h;
	161	unsigned char *dst = dest;
791f6e3e	162	if (png_get_bit_depth(png_ptr, info_ptr) != 8)
698517be	163	{
791f6e3e	164	lprintf(__FILE__ ": image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
698517be	165	break;
698517be	166	}
791f6e3e	167	height = png_get_image_height(png_ptr, info_ptr);
698517be	168	if (height > req_h)
698517be	169	height = req_h;
791f6e3e	170	width = png_get_image_width(png_ptr, info_ptr);
698517be	171	if (width > req_w)
	172	width = req_w;
	173
	174	for (h = 0; h < height; h++)
	175	{
	176	int len = width;
	177	unsigned char *src = row_ptr[h];
	178	dst += (req_w - width) * 3;
	179	for (len = width; len > 0; len--, dst+=3, src+=3)
	180	dst[0] = src[2], dst[1] = src[1], dst[2] = src[0];
	181	}
	182	break;
	183	}
	184	}
	185
	186
	187	ret = 0;
	188	done:
	189	png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, (png_infopp)NULL);
	190	fclose(fp);
	191	return ret;
	192	}
	193
29a8c4f3	194	int writepng(const char fname, unsigned short src, int w, int h)
	195	{
	196	png_structp png_ptr = NULL;
	197	png_infop info_ptr = NULL;
	198	png_bytepp row_pointers;
	199	int i, j, ret = -1;
	200	FILE *f;
	201
	202	f = fopen(fname, "wb");
	203	if (f == NULL) {
	204	lprintf(__FILE__ ": failed to open \"%s\"\n", fname);
	205	return -1;
	206	}
	207
	208	row_pointers = calloc(h, sizeof(row_pointers[0]));
	209	if (row_pointers == NULL)
	210	goto end1;
	211
	212	for (i = 0; i < h; i++) {
	213	unsigned char dst = malloc(w 3);
	214	if (dst == NULL)
	215	goto end2;
	216	row_pointers[i] = dst;
	217	for (j = 0; j < w; j++, src++, dst += 3) {
	218	dst[0] = (*src & 0xf800) >> 8;
	219	dst[1] = (*src & 0x07e0) >> 3;
	220	dst[2] = (*src & 0x001f) << 3;
	221	}
	222	}
	223
	224	/* initialize stuff */
	225	png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
	226	if (png_ptr == NULL) {
	227	fprintf(stderr, "png_create_write_struct() failed");
	228	goto end2;
	229	}
	230
	231	info_ptr = png_create_info_struct(png_ptr);
	232	if (info_ptr == NULL) {
	233	fprintf(stderr, "png_create_info_struct() failed");
	234	goto end3;
	235	}
	236
	237	if (setjmp(png_jmpbuf(png_ptr)) != 0) {
	238	fprintf(stderr, "error in png code\n");
	239	goto end4;
	240	}
	241
	242	png_init_io(png_ptr, f);
	243
	244	png_set_IHDR(png_ptr, info_ptr, w, h,
	245	8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
	246	PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
	247
	248	png_write_info(png_ptr, info_ptr);
	249	png_write_image(png_ptr, row_pointers);
	250	png_write_end(png_ptr, NULL);
	251
	252	ret = 0;
	253
	254	end4:
	255	// png_destroy_info_struct(png_ptr, &info_ptr); // freed below
	256	end3:
	257	png_destroy_write_struct(&png_ptr, &info_ptr);
258	end2:
259	for (i = 0; i < h; i++)
260	free(row_pointers[i]);
261	free(row_pointers);
262	end1:
263	fclose(f);
264	return ret;
265	}
698517be	266