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Location: cpp/openttd-patchpack/source/src/os/macosx/splash.cpp - annotation
r12106:cf114d790cce
4.0 KiB
text/x-c
(svn r16524) -Fix [FS#2963]: missing guards in the NoAI API making it possible to hit an assert in OpenTTD.
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/** @file splash.cpp Splash screen support for OSX. */
#include "../../stdafx.h"
#include "../../openttd.h"
#include "../../variables.h"
#include "../../debug.h"
#include "../../gfx_func.h"
#include "../../fileio_func.h"
#include "../../blitter/factory.hpp"
#include "splash.h"
#ifdef WITH_PNG
#include <png.h>
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_ptr->jmpbuf, 1);
}
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));
}
void DisplaySplashImage()
{
png_byte header[8];
FILE *f;
png_structp png_ptr;
png_infop info_ptr, end_info;
uint width, height, bit_depth, color_type;
png_colorp palette;
int num_palette;
png_bytep *row_pointers;
uint8 *src;
uint y;
uint xoff, yoff;
int i;
f = FioFOpenFile(SPLASH_IMAGE_FILE);
if (f == NULL) return;
fread(header, 1, 8, f);
if (png_sig_cmp(header, 0, 8) != 0) {
fclose(f);
return;
}
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;
}
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;
}
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);
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
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;
xoff = (_screen.width - width) / 2;
yoff = (_screen.height - height) / 2;
switch (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth()) {
case 8: {
uint8 *dst;
memset(_screen.dst_ptr, 0xff, _screen.pitch * _screen.height);
for (y = 0; y < height; y++) {
src = row_pointers[y];
dst = ((uint8 *) _screen.dst_ptr) + (yoff + y) * _screen.pitch + xoff;
memcpy(dst, src, width);
}
for (i = 0; i < num_palette; i++) {
_cur_palette[i].a = i == 0 ? 0 : 0xff;
_cur_palette[i].r = palette[i].red;
_cur_palette[i].g = palette[i].green;
_cur_palette[i].b = palette[i].blue;
}
_cur_palette[0xff].a = 0xff;
_cur_palette[0xff].r = 0;
_cur_palette[0xff].g = 0;
_cur_palette[0xff].b = 0;
_pal_first_dirty = 0;
_pal_count_dirty = 256;
}
break;
case 32: {
uint32 *dst;
uint x;
memset(_screen.dst_ptr, 0xff000000, _screen.pitch * _screen.height * 4);
for (y = 0; y < height; y++) {
src = row_pointers[y];
dst = ((uint32 *) _screen.dst_ptr) + (yoff + y) * _screen.pitch + xoff;
for (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 */
void DisplaySplashImage() {}
#endif /* WITH_PNG */
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