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Location: cpp/openttd-patchpack/source/src/os/macosx/splash.cpp - annotation
r22549:21c2f1153122
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text/x-c
(svn r27756) -Codechange: Add StringTab enum
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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file splash.cpp Splash screen support for OSX. */
#include "../../stdafx.h"
#include "../../openttd.h"
#include "../../debug.h"
#include "../../gfx_func.h"
#include "../../fileio_func.h"
#include "../../blitter/factory.hpp"
#include "../../core/mem_func.hpp"
#include "splash.h"
#ifdef WITH_PNG
#include <png.h>
#include "../../safeguards.h"
/**
* Handle pnglib error.
*
* @param png_ptr Pointer to png struct.
* @param message Error message text.
*/
static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
{
DEBUG(misc, 0, "[libpng] error: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
longjmp(png_jmpbuf(png_ptr), 1);
}
/**
* Handle warning in pnglib.
*
* @param png_ptr Pointer to png struct.
* @param message Warning message text.
*/
static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
{
DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
}
/**
* Display a splash image shown on startup (WITH_PNG).
*/
void DisplaySplashImage()
{
FILE *f = FioFOpenFile(SPLASH_IMAGE_FILE, "r", BASESET_DIR);
if (f == NULL) return;
png_byte header[8];
fread(header, sizeof(png_byte), 8, f);
if (png_sig_cmp(header, 0, 8) != 0) {
fclose(f);
return;
}
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp) NULL, png_my_error, png_my_warning);
if (png_ptr == NULL) {
fclose(f);
return;
}
png_infop info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
fclose(f);
return;
}
png_infop end_info = png_create_info_struct(png_ptr);
if (end_info == NULL) {
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
fclose(f);
return;
}
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose(f);
return;
}
png_init_io(png_ptr, f);
png_set_sig_bytes(png_ptr, 8);
png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
uint width = png_get_image_width(png_ptr, info_ptr);
uint height = png_get_image_height(png_ptr, info_ptr);
uint bit_depth = png_get_bit_depth(png_ptr, info_ptr);
uint color_type = png_get_color_type(png_ptr, info_ptr);
if (color_type != PNG_COLOR_TYPE_PALETTE || bit_depth != 8) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose(f);
return;
}
if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose(f);
return;
}
png_colorp palette;
int num_palette;
png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
png_bytep *row_pointers = png_get_rows(png_ptr, info_ptr);
if (width > (uint) _screen.width) width = _screen.width;
if (height > (uint) _screen.height) height = _screen.height;
uint xoff = (_screen.width - width) / 2;
uint yoff = (_screen.height - height) / 2;
switch (BlitterFactory::GetCurrentBlitter()->GetScreenDepth()) {
case 8: {
uint8 *dst_ptr = (uint8 *)_screen.dst_ptr;
/* Initialize buffer */
MemSetT(dst_ptr, 0xff, _screen.pitch * _screen.height);
for (uint y = 0; y < height; y++) {
uint8 *src = row_pointers[y];
uint8 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
memcpy(dst, src, width);
}
for (int i = 0; i < num_palette; i++) {
_cur_palette.palette[i].a = i == 0 ? 0 : 0xff;
_cur_palette.palette[i].r = palette[i].red;
_cur_palette.palette[i].g = palette[i].green;
_cur_palette.palette[i].b = palette[i].blue;
}
_cur_palette.palette[0xff].a = 0xff;
_cur_palette.palette[0xff].r = 0;
_cur_palette.palette[0xff].g = 0;
_cur_palette.palette[0xff].b = 0;
_cur_palette.first_dirty = 0;
_cur_palette.count_dirty = 256;
break;
}
case 32: {
uint32 *dst_ptr = (uint32 *)_screen.dst_ptr;
/* Initialize buffer */
MemSetT(dst_ptr, 0, _screen.pitch * _screen.height);
for (uint y = 0; y < height; y++) {
uint8 *src = row_pointers[y];
uint32 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
for (uint x = 0; x < width; x++) {
dst[x] = palette[src[x]].blue | (palette[src[x]].green << 8) | (palette[src[x]].red << 16) | 0xff000000;
}
}
break;
}
}
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose(f);
return;
}
#else /* WITH_PNG */
/**
* Empty 'Display a splash image' routine (WITHOUT_PNG).
*/
void DisplaySplashImage() {}
#endif /* WITH_PNG */
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