OpenTTD-patches/screenshot.c
truelight 12c91671bf (svn r321) -Fix: crash when making png screenshot with odd resolution (Tron)
-Fix: unable to select other screenshot format in Game Option
2004-09-25 18:30:19 +00:00

479 lines
11 KiB
C

#include "stdafx.h"
#include "ttd.h"
#include "gfx.h"
#include "viewport.h"
#include "player.h"
#include "gui.h"
// called by the ScreenShot proc to generate screenshot lines.
typedef void ScreenshotCallback(void *userdata, byte *buf, uint y, uint pitch, uint n);
typedef bool ScreenshotHandlerProc(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const byte *palette);
typedef struct {
const char *name;
const char *extension;
ScreenshotHandlerProc *proc;
byte id;
} ScreenshotFormat;
//************************************************
//*** SCREENSHOT CODE FOR WINDOWS BITMAP (.BMP)
//************************************************
#if defined(_MSC_VER)
#pragma pack(push, 1)
#endif
typedef struct BitmapFileHeader {
uint16 type;
uint32 size;
uint32 reserved;
uint32 off_bits;
} GCC_PACK BitmapFileHeader;
assert_compile(sizeof(BitmapFileHeader) == 14);
#if defined(_MSC_VER)
#pragma pack(pop)
#endif
typedef struct BitmapInfoHeader {
uint32 size;
int32 width, height;
uint16 planes, bitcount;
uint32 compression, sizeimage, xpels, ypels, clrused, clrimp;
} BitmapInfoHeader;
assert_compile(sizeof(BitmapInfoHeader) == 40);
typedef struct RgbQuad {
byte blue, green, red, reserved;
} RgbQuad;
assert_compile(sizeof(RgbQuad) == 4);
// generic .BMP writer
static bool MakeBmpImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const byte *palette)
{
BitmapFileHeader bfh;
BitmapInfoHeader bih;
RgbQuad *rq = alloca(sizeof(RgbQuad) * 256);
byte *buff;
FILE *f;
uint i, padw;
uint n, maxlines;
// only implemented for 8bit images so far.
if (pixelformat != 8)
return false;
f = fopen(name, "wb");
if (f == NULL) return false;
// each scanline must be aligned on a 32bit boundary
padw = (w + 3) & ~3;
// setup the file header
bfh.type = TO_LE16('MB');
bfh.size = TO_LE32(sizeof(bfh) + sizeof(bih) + sizeof(RgbQuad) * 256 + padw * h);
bfh.reserved = 0;
bfh.off_bits = TO_LE32(sizeof(bfh) + sizeof(bih) + sizeof(RgbQuad) * 256);
// setup the info header
bih.size = TO_LE32(sizeof(BitmapInfoHeader));
bih.width = TO_LE32(w);
bih.height = TO_LE32(h);
bih.planes = TO_LE16(1);
bih.bitcount = TO_LE16(8);
bih.compression = 0;
bih.sizeimage = 0;
bih.xpels = 0;
bih.ypels = 0;
bih.clrused = 0;
bih.clrimp = 0;
// convert the palette to the windows format
for(i=0; i!=256; i++) {
rq[i].red = *palette++;
rq[i].green = *palette++;
rq[i].blue = *palette++;
rq[i].reserved = 0;
}
// write file header and info header and palette
fwrite(&bfh, 1, sizeof(bfh), f);
fwrite(&bih, 1, sizeof(bih), f);
fwrite(rq, 1, sizeof(RgbQuad) * 256, f);
// use by default 64k temp memory
maxlines = clamp(65536 / padw, 16, 128);
// now generate the bitmap bits
buff = (byte*)alloca(padw * maxlines); // by default generate 128 lines at a time.
memset(buff, 0, padw * maxlines); // zero the buffer to have the padding bytes set to 0
// start at the bottom, since bitmaps are stored bottom up.
do {
// determine # lines
n = min(h, maxlines);
h -= n;
// render the pixels
callb(userdata, buff, h, padw, n);
// write each line
while (n)
fwrite(buff + (--n) * padw, 1, padw, f);
} while (h);
fclose(f);
return true;
}
//********************************************************
//*** SCREENSHOT CODE FOR PORTABLE NETWORK GRAPHICS (.PNG)
//********************************************************
#if defined(WITH_PNG)
#include <png.h>
static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
{
DEBUG(misc, 0) ("ERROR(libpng): %s - %s\n", 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, 0) ("WARNING(libpng): %s - %s\n", message, (char *)png_get_error_ptr(png_ptr));
}
static bool MakePNGImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const byte *palette)
{
png_colorp rq = alloca(sizeof(png_color) * 256);
byte *buff;
FILE *f;
uint i, y, n;
uint maxlines;
png_structp png_ptr;
png_infop info_ptr;
// only implemented for 8bit images so far.
if (pixelformat != 8)
return false;
f = fopen(name, "wb");
if (f == NULL) return false;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (char *) name, png_my_error, png_my_warning);
if (!png_ptr) {
fclose(f);
return false;
}
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
fclose(f);
return false;
}
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(f);
return false;
}
png_init_io(png_ptr, f);
png_set_filter(png_ptr, 0, PNG_FILTER_NONE);
png_set_IHDR(png_ptr, info_ptr, w, h, pixelformat, PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
// convert the palette to the .PNG format.
{
// avoids "might be clobbered" warning of argument "palette"
const byte *pal = palette;
for(i=0; i!=256; i++) {
rq[i].red = *pal++;
rq[i].green = *pal++;
rq[i].blue = *pal++;
}
}
png_set_PLTE(png_ptr, info_ptr, rq, 256);
png_write_info(png_ptr, info_ptr);
png_set_flush(png_ptr, 512);
// use by default 64k temp memory
maxlines = clamp(65536 / w, 16, 128);
// now generate the bitmap bits
buff = (byte*)alloca(w * maxlines); // by default generate 128 lines at a time.
memset(buff, 0, w * maxlines); // zero the buffer to have the padding bytes set to 0
y = 0;
do {
// determine # lines to write
n = min(h - y, maxlines);
// render the pixels into the buffer
callb(userdata, buff, y, w, n);
y += n;
// write them to png
for(i=0; i!=n; i++)
png_write_row(png_ptr, buff + i * w);
} while (y != h);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(f);
return true;
}
#endif // WITH_PNG
//************************************************
//*** SCREENSHOT CODE FOR ZSOFT PAINTBRUSH (.PCX)
//************************************************
typedef struct {
byte manufacturer;
byte version;
byte rle;
byte bpp;
uint32 unused;
uint16 xmax, ymax;
uint16 hdpi, vdpi;
byte pal_small[16*3];
byte reserved;
byte planes;
uint16 pitch;
uint16 cpal;
uint16 width;
uint16 height;
byte filler[54];
} PcxHeader;
assert_compile(sizeof(PcxHeader) == 128);
static bool MakePCXImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const byte *palette)
{
byte *buff;
FILE *f;
uint maxlines;
uint y;
PcxHeader pcx;
if (pixelformat != 8 || w == 0)
return false;
f = fopen(name, "wb");
if (f == NULL) return false;
memset(&pcx, 0, sizeof(pcx));
// setup pcx header
pcx.manufacturer = 10;
pcx.version = 5;
pcx.rle = 1;
pcx.bpp = 8;
pcx.xmax = TO_LE16(w-1);
pcx.ymax = TO_LE16(h-1);
pcx.hdpi = TO_LE16(320);
pcx.vdpi = TO_LE16(320);
pcx.planes = 1;
pcx.cpal = TO_LE16(1);
pcx.width = pcx.pitch = TO_LE16(w);
pcx.height = TO_LE16(h);
// write pcx header
fwrite(&pcx, sizeof(pcx), 1, f);
// use by default 64k temp memory
maxlines = clamp(65536 / w, 16, 128);
// now generate the bitmap bits
buff = (byte*)alloca(w * maxlines); // by default generate 128 lines at a time.
memset(buff, 0, w * maxlines); // zero the buffer to have the padding bytes set to 0
y = 0;
do {
// determine # lines to write
uint n = min(h - y, maxlines), i;
// render the pixels into the buffer
callb(userdata, buff, y, w, n);
y += n;
// write them to pcx
for(i=0; i!=n; i++) {
int runcount = 1;
byte *bufp = buff + i * w;
byte runchar = buff[0];
uint left = w - 1;
// for each pixel...
while (left) {
byte ch = *bufp++;
if (ch != runchar || runcount >= 0x3f) {
if (runcount > 1 || (runchar & 0xC0) == 0xC0) fputc(0xC0 | runcount, f);
fputc(runchar,f);
runcount = 0;
runchar = ch;
}
runcount++;
left--;
}
// write remaining bytes..
if (runcount > 1 || (runchar & 0xC0) == 0xC0) fputc(0xC0 | runcount, f);
fputc(runchar,f);
}
} while (y != h);
// write 8-bit color palette
fputc(12, f);
fwrite(palette, 256*3, 1, f);
fclose(f);
return true;
}
//************************************************
//*** GENERIC SCREENSHOT CODE
//************************************************
static const ScreenshotFormat _screenshot_formats[] = {
{"BMP", "bmp", &MakeBmpImage},
#if defined(WITH_PNG)
{"PNG", "png", &MakePNGImage},
#endif
{"PCX", "pcx", &MakePCXImage},
};
void InitializeScreenshotFormats()
{
int i,j;
for (i=0,j=0; i!=lengthof(_screenshot_formats); i++)
if (!strcmp(_screenshot_format_name, _screenshot_formats[i].extension)) { j=i; break; }
_cur_screenshot_format = j;
_num_screenshot_formats = lengthof(_screenshot_formats);
}
const char *GetScreenshotFormatDesc(int i)
{
return _screenshot_formats[i].name;
}
void SetScreenshotFormat(int i)
{
_cur_screenshot_format = i;
strcpy(_screenshot_format_name, _screenshot_formats[i].extension);
}
// screenshot generator that dumps the current video buffer
void CurrentScreenCallback(void *userdata, byte *buf, uint y, uint pitch, uint n)
{
for (; n > 0; --n)
{
memcpy(buf, _screen.dst_ptr + y * _screen.pitch, _screen.width);
++y;
buf += pitch;
}
}
extern void ViewportDoDraw(ViewPort *vp, int left, int top, int right, int bottom);
// generate a large piece of the world
void LargeWorldCallback(void *userdata, byte *buf, uint y, uint pitch, uint n)
{
ViewPort *vp = (ViewPort *)userdata;
DrawPixelInfo dpi, *old_dpi;
int wx, left;
old_dpi = _cur_dpi;
_cur_dpi = &dpi;
dpi.dst_ptr = buf;
dpi.height = n;
dpi.width = vp->width;
dpi.pitch = pitch;
dpi.zoom = 0;
dpi.left = 0;
dpi.top = y;
left = 0;
while (vp->width - left != 0) {
wx = min(vp->width - left, 1600);
left += wx;
ViewportDoDraw(vp,
((left - wx - vp->left) << vp->zoom) + vp->virtual_left,
((y - vp->top) << vp->zoom) + vp->virtual_top,
((left - vp->left) << vp->zoom) + vp->virtual_left,
(((y+n) - vp->top) << vp->zoom) + vp->virtual_top
);
}
_cur_dpi = old_dpi;
}
static char *MakeScreenshotName(const char *ext)
{
static char filename[256];
char *base;
int serial;
if (_game_mode == GM_EDITOR || _local_player == OWNER_SPECTATOR) {
sprintf(_screenshot_name, "screenshot");
} else {
Player *p = &_players[_local_player];
SET_DPARAM16(0, p->name_1);
SET_DPARAM32(1, p->name_2);
SET_DPARAM16(2, _date);
GetString(_screenshot_name, STR_4004);
}
base = strchr(_screenshot_name, 0);
base[0] = '.'; strcpy(base + 1, ext);
serial = 0;
for(;;) {
snprintf(filename, sizeof(filename), "%s%s", _path.personal_dir, _screenshot_name);
if (!FileExists(filename))
break;
sprintf(base, " #%d.%s", ++serial, ext);
}
return filename;
}
extern byte _cur_palette[768];
bool MakeScreenshot()
{
const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
return sf->proc(MakeScreenshotName(sf->extension), CurrentScreenCallback, NULL, _screen.width, _screen.height, 8, _cur_palette);
}
bool MakeWorldScreenshot(int left, int top, int width, int height, int zoom)
{
ViewPort vp;
const ScreenshotFormat *sf;
vp.zoom = zoom;
vp.left = 0;
vp.top = 0;
vp.virtual_width = width;
vp.width = width >> zoom;
vp.virtual_height = height;
vp.height = height >> zoom;
vp.virtual_left = left;
vp.virtual_top = top;
sf = _screenshot_formats + _cur_screenshot_format;
return sf->proc(MakeScreenshotName(sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, 8, _cur_palette);
}