From 6dd7157ffb8c2cd6fd6ff8076ab765000a2c8e40 Mon Sep 17 00:00:00 2001 From: Daniel Silverstone Date: Thu, 26 Feb 2009 14:14:29 +0000 Subject: Add a resources Makefile, support host tools, and add support to build framebuffer assets from PNG resources svn path=/trunk/netsurf/; revision=6631 --- framebuffer/fb_convert_image.c | 306 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 framebuffer/fb_convert_image.c (limited to 'framebuffer/fb_convert_image.c') diff --git a/framebuffer/fb_convert_image.c b/framebuffer/fb_convert_image.c new file mode 100644 index 000000000..4fe4c8269 --- /dev/null +++ b/framebuffer/fb_convert_image.c @@ -0,0 +1,306 @@ +/* + * Copyright 2009 Daniel Silverstone + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include + +static png_structp png; +static png_infop info; +static int interlace; +static size_t rowbytes; +static int raw_width, raw_height; +static int rowstride; +static unsigned char *bitmap_data; +static bool is_cursor = true; +static int raw_hot_x, raw_hot_y; + +#define WIDTH (is_cursor?raw_width-1:raw_width) +#define HEIGHT (is_cursor?raw_height-1:raw_height) + +#define HOT_X (is_cursor?raw_hot_x-1:0) +#define HOT_Y (is_cursor?raw_hot_y-1:0) + +#define REAL(v) (is_cursor?v+1:v) + +#define PPIX_AT(x,y) ((bitmap_data + (rowstride * y)) + (x * 4)) + +#define R_OFF 2 +#define G_OFF 1 +#define B_OFF 0 +#define A_OFF 3 + +#define R_AT(x,y) *(PPIX_AT(x,y) + R_OFF) +#define G_AT(x,y) *(PPIX_AT(x,y) + G_OFF) +#define B_AT(x,y) *(PPIX_AT(x,y) + B_OFF) +#define A_AT(x,y) *(PPIX_AT(x,y) + A_OFF) + +static void info_callback(png_structp png, png_infop info); +static void row_callback(png_structp png, png_bytep new_row, + png_uint_32 row_num, int pass); +static void end_callback(png_structp png, png_infop info); + + + +static void +usage(void) +{ + fprintf(stderr, "usage: fb_convert_image input.png output.inc varname\n"); +} + +static void info_callback(png_structp png, png_infop info); +static void row_callback(png_structp png, png_bytep new_row, + png_uint_32 row_num, int pass); +static void end_callback(png_structp png, png_infop info); + + +static void +detect_hotspot(void) +{ + int i; + int greenpixels = 0; + + for (i = 0; i < raw_width; ++i) { + if (A_AT(i, 0) == 255) { + if (G_AT(i, 0) == 255) { + greenpixels++; + raw_hot_x = i; + } + if ((B_AT(i, 0) != 0) || (R_AT(i, 0) != 0)) { + is_cursor = false; + return; + } + } else if (A_AT(i, 0) != 0) { + is_cursor = false; + return; + } + } + if (greenpixels != 1) { + is_cursor = false; + return; + } + + for (i = 0; i < raw_height; ++i) { + if (A_AT(0, i) == 255) { + if (G_AT(0, i) == 255) { + greenpixels++; + raw_hot_y = i; + } + if ((B_AT(0, i) != 0) || (R_AT(0, i) != 0)) { + is_cursor = false; + return; + } + } else if (A_AT(0, i) != 0) { + is_cursor = false; + return; + } + } + if (greenpixels != 2) { + is_cursor = false; + return; + } + printf(" Pointer detected. Adjusted hotspot at %d, %d (0-based)\n", + raw_hot_x - 1, raw_hot_y - 1); +} + +int +main(int argc, char **argv) +{ + FILE *f; + unsigned char buffer[1024]; + int br; + int x, y, c; + + if (argc != 4) { + usage(); + return 1; + } + + printf(" CONVERT: %s (%s)\n", argv[1], argv[3]); + + png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0); + info = png_create_info_struct(png); + + png_set_progressive_read_fn(png, NULL, info_callback, row_callback, end_callback); + + f = fopen(argv[1], "rb"); + if (f == NULL) { + printf(" Unable to open %s\n", argv[1]); + return 1; + } + + do { + br = fread(buffer, 1, 1024, f); + if (br > 0) { + png_process_data(png, info, buffer, br); + } + } while (br > 0); + + if (br < 0) { + printf("Error reading input: %s\n", strerror(errno)); + return 1; + } + + fclose(f); + + detect_hotspot(); + + f = fopen(argv[2], "w"); + if (f == NULL) { + printf(" Unable to open %s\n", argv[2]); + return 2; + } + + fprintf(f, "/* This file is auto-generated from %s\n", argv[1]); + fprintf(f, " *\n * Do not edit this file directly.\n */\n\n"); + fprintf(f, "#include \n\n"); + fprintf(f, "#include \n\n"); + fprintf(f, "#include \"framebuffer/fb_bitmap.h\"\n\n"); + + fprintf(f, "static uint8_t %s_pixdata[] = {\n", argv[3]); + for (y = 0; y < HEIGHT; ++y) { + unsigned char *rowptr = bitmap_data + (rowstride * y); + if (is_cursor) { + /* If it's a cursor, skip one row and one column */ + rowptr += rowstride + 4; + } + fprintf(f, "\t"); + for (x = 0; x < WIDTH; ++x) { + for (c = 0; c < 4; ++c) { + unsigned char b = *rowptr++; + fprintf(f, "0x%02x, ", b); + } + } + fprintf(f, "\n"); + } + fprintf(f, "};\n\n"); + + fprintf(f, "struct bitmap %s = {\n", argv[3]); + fprintf(f, "\t.width\t\t= %d,\n", WIDTH); + fprintf(f, "\t.height\t\t= %d,\n", HEIGHT); + fprintf(f, "\t.hot_x\t\t= %d,\n", HOT_X); + fprintf(f, "\t.hot_y\t\t= %d,\n", HOT_Y); + fprintf(f, "\t.pixdata\t= %s_pixdata,\n", argv[3]); + + fprintf(f, "};\n\n"); + fclose(f); + + return 0; +} + +static void +info_callback(png_structp png, png_infop info) +{ + int bit_depth, color_type, interlace, intent; + double gamma; + unsigned long width, height; + + /* Read the PNG details */ + png_get_IHDR(png, info, &width, &height, &bit_depth, + &color_type, &interlace, 0, 0); + + /* Set up our transformations */ + if (color_type == PNG_COLOR_TYPE_PALETTE) + png_set_palette_to_rgb(png); + if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) + png_set_gray_1_2_4_to_8(png); + if (png_get_valid(png, info, PNG_INFO_tRNS)) + png_set_tRNS_to_alpha(png); + if (bit_depth == 16) + png_set_strip_16(png); + if (color_type == PNG_COLOR_TYPE_GRAY || + color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + png_set_gray_to_rgb(png); + if (!(color_type & PNG_COLOR_MASK_ALPHA)) + png_set_filler(png, 0xff, PNG_FILLER_AFTER); + /* gamma correction - we use 2.2 as our screen gamma + * this appears to be correct (at least in respect to !Browse) + * see http://www.w3.org/Graphics/PNG/all_seven.html for a test case + */ + if (png_get_sRGB(png, info, &intent)) + png_set_gamma(png, 2.2, 0.45455); + else { + if (png_get_gAMA(png, info, &gamma)) + png_set_gamma(png, 2.2, gamma); + else + png_set_gamma(png, 2.2, 0.45455); + } + + + png_read_update_info(png, info); + + rowbytes = png_get_rowbytes(png, info); + interlace = (interlace == PNG_INTERLACE_ADAM7); + raw_width = width; + raw_height = height; + + rowstride = raw_width * 4; + bitmap_data = malloc(rowstride * raw_height); +} + +static unsigned int interlace_start[8] = {0, 16, 0, 8, 0, 4, 0}; +static unsigned int interlace_step[8] = {28, 28, 12, 12, 4, 4, 0}; +static unsigned int interlace_row_start[8] = {0, 0, 4, 0, 2, 0, 1}; +static unsigned int interlace_row_step[8] = {8, 8, 8, 4, 4, 2, 2}; + +static void +row_callback(png_structp png, png_bytep new_row, + png_uint_32 row_num, int pass) +{ + unsigned long i, j; + unsigned int start, step; + unsigned char *row = bitmap_data + (rowstride * row_num); + + if (new_row == 0) + return; + + if (interlace) { + start = interlace_start[pass]; + step = interlace_step[pass]; + row_num = interlace_row_start[pass] + + interlace_row_step[pass] * row_num; + + /* Copy the data to our current row taking interlacing + * into consideration */ + row = bitmap_data + (rowstride * row_num); + for (j = 0, i = start; i < rowbytes; i += step) { + row[i++] = new_row[j++]; + row[i++] = new_row[j++]; + row[i++] = new_row[j++]; + row[i++] = new_row[j++]; + } + } else { + memcpy(row, new_row, rowbytes); + } +} + +static void +end_callback(png_structp png, png_infop info) +{ +} + + + +/* + * Local Variables: + * c-basic-offset:8 + * End: + */ + -- cgit v1.2.3