(svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)

src/os/macosx/splash.cpp

@@ -0,0 +1,144 @@
+/* $Id$ */
+
+#include "../../stdafx.h"
+#include "../../openttd.h"
+#include "../../variables.h"
+#include "../../macros.h"
+#include "../../debug.h"
+#include "../../functions.h"
+#include "../../gfx.h"
+#include "../../fileio.h"
+
+#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(void)
+{
+	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, *dst;
+	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);
+
+	memset(_screen.dst_ptr, 0xff, _screen.pitch * _screen.height);
+
+	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;
+	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].r = palette[i].red;
+		_cur_palette[i].g = palette[i].green;
+		_cur_palette[i].b = palette[i].blue;
+	}
+
+	_cur_palette[0xff].r = 0;
+	_cur_palette[0xff].g = 0;
+	_cur_palette[0xff].b = 0;
+
+	_pal_first_dirty = 0;
+	_pal_last_dirty = 0xff;
+
+	png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+	fclose(f);
+	return;
+}
+
+
+
+#else /* WITH_PNG */
+
+void DisplaySplashImage(void) {}
+
+#endif /* WITH_PNG */