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Location: cpp/openttd-patchpack/source/src/screenshot.cpp - annotation
r13911:91a4a9d07d39
17.2 KiB
text/x-c
(svn r18452) -Document: update the known-bugs a bit; quite a few bugs in there are fixing in trunk already.
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r5584:545d748cc681 r5584:545d748cc681 r5584:545d748cc681 r13622:200502780bca r13622:200502780bca r13418:93c4d9fb87b7 r5584:545d748cc681 r5584:545d748cc681 r13418:93c4d9fb87b7 r5584:545d748cc681 r5584:545d748cc681 r5584:545d748cc681 r5584:545d748cc681 | /* $Id$ */
/*
* 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 screenshot.cpp The creation of screenshots! */
#include "stdafx.h"
#include "openttd.h"
#include "fileio_func.h"
#include "viewport_func.h"
#include "gfx_func.h"
#include "screenshot.h"
#include "blitter/factory.hpp"
#include "zoom_func.h"
#include "core/endian_func.hpp"
#include "map_func.h"
#include "saveload/saveload.h"
#include "company_func.h"
char _screenshot_format_name[8];
uint _num_screenshot_formats;
uint _cur_screenshot_format;
char _screenshot_name[128];
char _full_screenshot_name[MAX_PATH];
static ScreenshotType _screenshot_type;
/* called by the ScreenShot proc to generate screenshot lines. */
typedef void ScreenshotCallback(void *userdata, void *buf, uint y, uint pitch, uint n);
typedef bool ScreenshotHandlerProc(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette);
struct ScreenshotFormat {
const char *name;
const char *extension;
ScreenshotHandlerProc *proc;
};
/*************************************************
**** SCREENSHOT CODE FOR WINDOWS BITMAP (.BMP)
*************************************************/
#if defined(_MSC_VER) || defined(__WATCOMC__)
#pragma pack(push, 1)
#endif
/** BMP File Header (stored in little endian) */
struct BitmapFileHeader {
uint16 type;
uint32 size;
uint32 reserved;
uint32 off_bits;
} GCC_PACK;
assert_compile(sizeof(BitmapFileHeader) == 14);
#if defined(_MSC_VER) || defined(__WATCOMC__)
#pragma pack(pop)
#endif
/** BMP Info Header (stored in little endian) */
struct BitmapInfoHeader {
uint32 size;
int32 width, height;
uint16 planes, bitcount;
uint32 compression, sizeimage, xpels, ypels, clrused, clrimp;
};
assert_compile(sizeof(BitmapInfoHeader) == 40);
/** Format of palette data in BMP header */
struct RgbQuad {
byte blue, green, red, reserved;
};
assert_compile(sizeof(RgbQuad) == 4);
/** Pixel data in 24bpp BMP */
struct RgbTriplet {
byte b, g, r;
};
assert_compile(sizeof(RgbTriplet) == 3);
/**
* Generic .BMP writer
* @param name file name including extension
* @param callb callback used for gathering rendered image
* @param userdata parameters forwarded to #callb
* @param w width in pixels
* @param h height in pixels
* @param pixelformat bits per pixel
* @param palette colour palette (for 8bpp mode)
* @return was everything ok?
*/
static bool MakeBMPImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
{
uint bpp; // bytes per pixel
switch (pixelformat) {
case 8: bpp = 1; break;
/* 32bpp mode is saved as 24bpp BMP */
case 32: bpp = 3; break;
/* Only implemented for 8bit and 32bit images so far */
default: return false;
}
FILE *f = fopen(name, "wb");
if (f == NULL) return false;
/* Each scanline must be aligned on a 32bit boundary */
uint bytewidth = Align(w * bpp, 4); // bytes per line in file
/* Size of palette. Only present for 8bpp mode */
uint pal_size = pixelformat == 8 ? sizeof(RgbQuad) * 256 : 0;
/* Setup the file header */
BitmapFileHeader bfh;
bfh.type = TO_LE16('MB');
bfh.size = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size + bytewidth * h);
bfh.reserved = 0;
bfh.off_bits = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size);
/* Setup the info header */
BitmapInfoHeader bih;
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(bpp * 8);
bih.compression = 0;
bih.sizeimage = 0;
bih.xpels = 0;
bih.ypels = 0;
bih.clrused = 0;
bih.clrimp = 0;
/* Write file header and info header */
if (fwrite(&bfh, sizeof(bfh), 1, f) != 1 || fwrite(&bih, sizeof(bih), 1, f) != 1) {
fclose(f);
return false;
}
if (pixelformat == 8) {
/* Convert the palette to the windows format */
RgbQuad rq[256];
for (uint i = 0; i < 256; i++) {
rq[i].red = palette[i].r;
rq[i].green = palette[i].g;
rq[i].blue = palette[i].b;
rq[i].reserved = 0;
}
/* Write the palette */
if (fwrite(rq, sizeof(rq), 1, f) != 1) {
fclose(f);
return false;
}
}
/* Try to use 64k of memory, store between 16 and 128 lines */
uint maxlines = Clamp(65536 / (w * pixelformat / 8), 16, 128); // number of lines per iteration
uint8 *buff = MallocT<uint8>(maxlines * w * pixelformat / 8); // buffer which is rendered to
uint8 *line = AllocaM(uint8, bytewidth); // one line, stored to file
memset(line, 0, bytewidth);
/* Start at the bottom, since bitmaps are stored bottom up */
do {
uint n = min(h, maxlines);
h -= n;
/* Render the pixels */
callb(userdata, buff, h, w, n);
/* Write each line */
while (n-- != 0) {
if (pixelformat == 8) {
/* Move to 'line', leave last few pixels in line zeroed */
memcpy(line, buff + n * w, w);
} else {
/* Convert from 'native' 32bpp to BMP-like 24bpp.
* Works for both big and little endian machines */
Colour *src = ((Colour *)buff) + n * w;
RgbTriplet *dst = (RgbTriplet *)line;
for (uint i = 0; i < w; i++) {
dst[i].r = src[i].r;
dst[i].g = src[i].g;
dst[i].b = src[i].b;
}
}
/* Write to file */
if (fwrite(line, bytewidth, 1, f) != 1) {
free(buff);
fclose(f);
return false;
}
}
} while (h != 0);
free(buff);
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, "[libpng] error: %s - %s", message, (const 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, (const char *)png_get_error_ptr(png_ptr));
}
static bool MakePNGImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
{
png_color rq[256];
FILE *f;
uint i, y, n;
uint maxlines;
uint bpp = pixelformat / 8;
png_structp png_ptr;
png_infop info_ptr;
/* only implemented for 8bit and 32bit images so far. */
if (pixelformat != 8 && pixelformat != 32) return false;
f = fopen(name, "wb");
if (f == NULL) return false;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (void *)name, png_my_error, png_my_warning);
if (png_ptr == NULL) {
fclose(f);
return false;
}
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
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, 8, pixelformat == 8 ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
if (pixelformat == 8) {
/* convert the palette to the .PNG format. */
for (i = 0; i != 256; i++) {
rq[i].red = palette[i].r;
rq[i].green = palette[i].g;
rq[i].blue = palette[i].b;
}
png_set_PLTE(png_ptr, info_ptr, rq, 256);
}
png_write_info(png_ptr, info_ptr);
png_set_flush(png_ptr, 512);
if (pixelformat == 32) {
png_color_8 sig_bit;
/* Save exact colour/alpha resolution */
sig_bit.alpha = 0;
sig_bit.blue = 8;
sig_bit.green = 8;
sig_bit.red = 8;
sig_bit.gray = 8;
png_set_sBIT(png_ptr, info_ptr, &sig_bit);
#if TTD_ENDIAN == TTD_LITTLE_ENDIAN
png_set_bgr(png_ptr);
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
#else
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
#endif /* TTD_ENDIAN == TTD_LITTLE_ENDIAN */
}
/* use by default 64k temp memory */
maxlines = Clamp(65536 / w, 16, 128);
/* now generate the bitmap bits */
void *buff = CallocT<uint8>(w * maxlines * bpp); // by default generate 128 lines at a time.
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, (png_bytep)buff + i * w * bpp);
} while (y != h);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
free(buff);
fclose(f);
return true;
}
#endif /* WITH_PNG */
/*************************************************
**** SCREENSHOT CODE FOR ZSOFT PAINTBRUSH (.PCX)
*************************************************/
struct PcxHeader {
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];
};
assert_compile(sizeof(PcxHeader) == 128);
static bool MakePCXImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
{
FILE *f;
uint maxlines;
uint y;
PcxHeader pcx;
bool success;
if (pixelformat == 32) {
DEBUG(misc, 0, "Can't convert a 32bpp screenshot to PCX format. Please pick an other format.");
return false;
}
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 */
if (fwrite(&pcx, sizeof(pcx), 1, f) != 1) {
fclose(f);
return false;
}
/* use by default 64k temp memory */
maxlines = Clamp(65536 / w, 16, 128);
/* now generate the bitmap bits */
uint8 *buff = CallocT<uint8>(w * maxlines); // by default generate 128 lines at a time.
y = 0;
do {
/* determine # lines to write */
uint n = min(h - y, maxlines);
uint 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++) {
const uint8 *bufp = buff + i * w;
byte runchar = bufp[0];
uint runcount = 1;
uint j;
/* for each pixel... */
for (j = 1; j < w; j++) {
uint8 ch = bufp[j];
if (ch != runchar || runcount >= 0x3f) {
if (runcount > 1 || (runchar & 0xC0) == 0xC0)
if (fputc(0xC0 | runcount, f) == EOF) {
free(buff);
fclose(f);
return false;
}
if (fputc(runchar, f) == EOF) {
free(buff);
fclose(f);
return false;
}
runcount = 0;
runchar = ch;
}
runcount++;
}
/* write remaining bytes.. */
if (runcount > 1 || (runchar & 0xC0) == 0xC0)
if (fputc(0xC0 | runcount, f) == EOF) {
free(buff);
fclose(f);
return false;
}
if (fputc(runchar, f) == EOF) {
free(buff);
fclose(f);
return false;
}
}
} while (y != h);
free(buff);
/* write 8-bit colour palette */
if (fputc(12, f) == EOF) {
fclose(f);
return false;
}
/* Palette is word-aligned, copy it to a temporary byte array */
byte tmp[256 * 3];
for (uint i = 0; i < 256; i++) {
tmp[i * 3 + 0] = palette[i].r;
tmp[i * 3 + 1] = palette[i].g;
tmp[i * 3 + 2] = palette[i].b;
}
success = fwrite(tmp, sizeof(tmp), 1, f) == 1;
fclose(f);
return success;
}
/*************************************************
**** GENERIC SCREENSHOT CODE
*************************************************/
static const ScreenshotFormat _screenshot_formats[] = {
#if defined(WITH_PNG)
{"PNG", "png", &MakePNGImage},
#endif
{"BMP", "bmp", &MakeBMPImage},
{"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);
_screenshot_type = SC_NONE;
}
const char *GetScreenshotFormatDesc(int i)
{
return _screenshot_formats[i].name;
}
void SetScreenshotFormat(int i)
{
_cur_screenshot_format = i;
strecpy(_screenshot_format_name, _screenshot_formats[i].extension, lastof(_screenshot_format_name));
}
/* screenshot generator that dumps the current video buffer */
static void CurrentScreenCallback(void *userdata, void *buf, uint y, uint pitch, uint n)
{
Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
void *src = blitter->MoveTo(_screen.dst_ptr, 0, y);
blitter->CopyImageToBuffer(src, buf, _screen.width, n, pitch);
}
/** generate a large piece of the world
* @param userdata Viewport area to draw
* @param buf Videobuffer with same bitdepth as current blitter
* @param y First line to render
* @param pitch Pitch of the videobuffer
* @param n Number of lines to render
*/
static void LargeWorldCallback(void *userdata, void *buf, uint y, uint pitch, uint n)
{
ViewPort *vp = (ViewPort *)userdata;
DrawPixelInfo dpi, *old_dpi;
int wx, left;
/* We are no longer rendering to the screen */
DrawPixelInfo old_screen = _screen;
bool old_disable_anim = _screen_disable_anim;
_screen.dst_ptr = buf;
_screen.width = pitch;
_screen.height = n;
_screen.pitch = pitch;
_screen_disable_anim = true;
old_dpi = _cur_dpi;
_cur_dpi = &dpi;
dpi.dst_ptr = buf;
dpi.height = n;
dpi.width = vp->width;
dpi.pitch = pitch;
dpi.zoom = ZOOM_LVL_WORLD_SCREENSHOT;
dpi.left = 0;
dpi.top = y;
/* Render viewport in blocks of 1600 pixels width */
left = 0;
while (vp->width - left != 0) {
wx = min(vp->width - left, 1600);
left += wx;
ViewportDoDraw(vp,
ScaleByZoom(left - wx - vp->left, vp->zoom) + vp->virtual_left,
ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top,
ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
ScaleByZoom((y + n) - vp->top, vp->zoom) + vp->virtual_top
);
}
_cur_dpi = old_dpi;
/* Switch back to rendering to the screen */
_screen = old_screen;
_screen_disable_anim = old_disable_anim;
}
static const char *MakeScreenshotName(const char *ext)
{
bool generate = StrEmpty(_screenshot_name);
if (generate) {
if (_game_mode == GM_EDITOR || _game_mode == GM_MENU || _local_company == COMPANY_SPECTATOR) {
strecpy(_screenshot_name, "screenshot", lastof(_screenshot_name));
} else {
GenerateDefaultSaveName(_screenshot_name, lastof(_screenshot_name));
}
}
/* Add extension to screenshot file */
size_t len = strlen(_screenshot_name);
snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, ".%s", ext);
for (uint serial = 1;; serial++) {
if (snprintf(_full_screenshot_name, lengthof(_full_screenshot_name), "%s%s", _personal_dir, _screenshot_name) >= (int)lengthof(_full_screenshot_name)) {
/* We need more characters than MAX_PATH -> end with error */
_full_screenshot_name[0] = '\0';
break;
}
if (!generate) break; // allow overwriting of non-automatic filenames
if (!FileExists(_full_screenshot_name)) break;
/* If file exists try another one with same name, but just with a higher index */
snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, "#%u.%s", serial, ext);
}
return _full_screenshot_name;
}
void RequestScreenshot(ScreenshotType t, const char *name)
{
_screenshot_type = t;
_screenshot_name[0] = '\0';
if (name != NULL) strecpy(_screenshot_name, name, lastof(_screenshot_name));
}
bool IsScreenshotRequested()
{
return (_screenshot_type != SC_NONE);
}
static bool MakeSmallScreenshot()
{
const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
return sf->proc(MakeScreenshotName(sf->extension), CurrentScreenCallback, NULL, _screen.width, _screen.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
}
static bool MakeWorldScreenshot()
{
ViewPort vp;
const ScreenshotFormat *sf;
vp.zoom = ZOOM_LVL_WORLD_SCREENSHOT;
vp.left = 0;
vp.top = 0;
vp.virtual_left = -(int)MapMaxX() * TILE_PIXELS;
vp.virtual_top = 0;
vp.virtual_width = (MapMaxX() + MapMaxY()) * TILE_PIXELS;
vp.width = vp.virtual_width;
vp.virtual_height = (MapMaxX() + MapMaxY()) * TILE_PIXELS >> 1;
vp.height = vp.virtual_height;
sf = _screenshot_formats + _cur_screenshot_format;
return sf->proc(MakeScreenshotName(sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
}
bool MakeScreenshot()
{
switch (_screenshot_type) {
case SC_VIEWPORT:
UndrawMouseCursor();
DrawDirtyBlocks();
/* FALL THROUGH */
case SC_RAW:
_screenshot_type = SC_NONE;
return MakeSmallScreenshot();
case SC_WORLD:
_screenshot_type = SC_NONE;
return MakeWorldScreenshot();
default: return false;
}
}
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