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168 lines
4.5 KiB
C++
168 lines
4.5 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD 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.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file splash.cpp Splash screen support for OSX. */
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#include "../../stdafx.h"
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#include "../../openttd.h"
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#include "../../debug.h"
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#include "../../gfx_func.h"
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#include "../../fileio_func.h"
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#include "../../blitter/factory.hpp"
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#include "../../core/mem_func.hpp"
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#include "splash.h"
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#ifdef WITH_PNG
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#include <png.h>
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static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
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{
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DEBUG(misc, 0, "[libpng] error: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
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longjmp(png_jmpbuf(png_ptr), 1);
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}
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static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
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{
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DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
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}
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void DisplaySplashImage()
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{
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FILE *f = FioFOpenFile(SPLASH_IMAGE_FILE);
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if (f == NULL) return;
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png_byte header[8];
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fread(header, sizeof(png_byte), 8, f);
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if (png_sig_cmp(header, 0, 8) != 0) {
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fclose(f);
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return;
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}
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png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp) NULL, png_my_error, png_my_warning);
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if (png_ptr == NULL) {
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fclose(f);
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return;
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}
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png_infop info_ptr = png_create_info_struct(png_ptr);
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if (info_ptr == NULL) {
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png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
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fclose(f);
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return;
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}
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png_infop end_info = png_create_info_struct(png_ptr);
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if (end_info == NULL) {
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png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
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fclose(f);
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return;
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}
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if (setjmp(png_jmpbuf(png_ptr))) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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fclose(f);
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return;
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}
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png_init_io(png_ptr, f);
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png_set_sig_bytes(png_ptr, 8);
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png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
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uint width = png_get_image_width(png_ptr, info_ptr);
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uint height = png_get_image_height(png_ptr, info_ptr);
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uint bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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uint color_type = png_get_color_type(png_ptr, info_ptr);
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if (color_type != PNG_COLOR_TYPE_PALETTE || bit_depth != 8) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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fclose(f);
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return;
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}
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if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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fclose(f);
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return;
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}
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png_colorp palette;
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int num_palette;
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png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
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png_bytep *row_pointers = png_get_rows(png_ptr, info_ptr);
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if (width > (uint) _screen.width) width = _screen.width;
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if (height > (uint) _screen.height) height = _screen.height;
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uint xoff = (_screen.width - width) / 2;
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uint yoff = (_screen.height - height) / 2;
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switch (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth()) {
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case 8: {
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uint8 *dst_ptr = (uint8 *)_screen.dst_ptr;
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/* Initialize buffer */
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MemSetT(dst_ptr, 0xff, _screen.pitch * _screen.height);
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for (uint y = 0; y < height; y++) {
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uint8 *src = row_pointers[y];
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uint8 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
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memcpy(dst, src, width);
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}
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for (int i = 0; i < num_palette; i++) {
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_cur_palette[i].a = i == 0 ? 0 : 0xff;
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_cur_palette[i].r = palette[i].red;
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_cur_palette[i].g = palette[i].green;
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_cur_palette[i].b = palette[i].blue;
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}
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_cur_palette[0xff].a = 0xff;
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_cur_palette[0xff].r = 0;
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_cur_palette[0xff].g = 0;
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_cur_palette[0xff].b = 0;
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_pal_first_dirty = 0;
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_pal_count_dirty = 256;
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break;
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}
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case 32: {
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uint32 *dst_ptr = (uint32 *)_screen.dst_ptr;
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/* Initialize buffer */
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MemSetT(dst_ptr, 0, _screen.pitch * _screen.height);
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for (uint y = 0; y < height; y++) {
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uint8 *src = row_pointers[y];
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uint32 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
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for (uint x = 0; x < width; x++) {
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dst[x] = palette[src[x]].blue | (palette[src[x]].green << 8) | (palette[src[x]].red << 16) | 0xff000000;
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}
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}
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break;
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}
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}
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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fclose(f);
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return;
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}
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#else /* WITH_PNG */
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void DisplaySplashImage() {}
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#endif /* WITH_PNG */
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