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(svn r22509) -Add: Save heightmap.

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alberth 2011-05-28 13:54:18 +00:00
parent 64745b4d0d
commit be048e05f2
2 changed files with 55 additions and 4 deletions
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49
src/screenshot.cpp
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@ -28,6 +28,7 @@
#include "table/strings.h"
static const char * const SCREENSHOT_NAME = "screenshot"; ///< Default filename of a saved screenshot.
static const char * const HEIGHTMAP_NAME = "heightmap"; ///< Default filename of a saved heightmap.
char _screenshot_format_name[8]; ///< Extension of the current screenshot format (corresponds with #_cur_screenshot_format).
uint _num_screenshot_formats; ///< Number of available screenshot formats.
@ -770,6 +771,48 @@ static bool MakeWorldScreenshot()
BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
}
/**
* Callback for generating a heightmap. Supports 8bpp grayscale only.
* @param userdata Pointer to user data.
* @param buf Destination buffer.
* @param y Line number of the first line to write.
* @param pitch Number of pixels to write (1 byte for 8bpp, 4 bytes for 32bpp). @see Colour
* @param n Number of lines to write.
* @see ScreenshotCallback
*/
static void HeightmapCallback(void *userdata, void *buffer, uint y, uint pitch, uint n)
{
byte *buf = (byte *)buffer;
while (n > 0) {
TileIndex ti = TileXY(MapMaxX(), y);
for (uint x = MapMaxX(); true; x--) {
*buf = 16 * TileHeight(ti);
buf++;
if (x == 0) break;
ti = TILE_ADDXY(ti, -1, 0);
}
y++;
n--;
}
}
/**
* Make a heightmap of the current map.
* @param filename Filename to use for saving.
*/
bool MakeHeightmapScreenshot(const char *filename)
{
Colour palette[256];
for (uint i = 0; i < lengthof(palette); i++) {
palette[i].a = 0xff;
palette[i].r = i;
palette[i].g = i;
palette[i].b = i;
}
const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
return sf->proc(filename, HeightmapCallback, NULL, MapSizeX(), MapSizeY(), 8, palette);
}
/**
* Make an actual screenshot.
* @param t the type of screenshot to make.
@ -805,6 +848,12 @@ bool MakeScreenshot(ScreenshotType t, const char *name)
ret = MakeWorldScreenshot();
break;
case SC_HEIGHTMAP: {
const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
ret = MakeHeightmapScreenshot(MakeScreenshotName(HEIGHTMAP_NAME, sf->extension));
break;
}
default:
NOT_REACHED();
}

10
src/screenshot.h
View File

@ -19,12 +19,14 @@ void SetScreenshotFormat(uint i);
/** Type of requested screenshot */
enum ScreenshotType {
SC_VIEWPORT, ///< Screenshot of viewport
SC_RAW, ///< Raw screenshot from blitter buffer
SC_ZOOMEDIN, ///< Zoomed in screenshot of the visible area
SC_WORLD, ///< World screenshot
SC_VIEWPORT, ///< Screenshot of viewport.
SC_RAW, ///< Raw screenshot from blitter buffer.
SC_ZOOMEDIN, ///< Zoomed in screenshot of the visible area.
SC_WORLD, ///< World screenshot.
SC_HEIGHTMAP, ///< Heightmap of the world.
};
bool MakeHeightmapScreenshot(const char *filename);
bool MakeScreenshot(ScreenshotType t, const char *name);
extern char _screenshot_format_name[8];