mirror of https://github.com/snes9xgit/snes9x.git
145 lines
3.2 KiB
C++
145 lines
3.2 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#ifdef HAVE_LIBPNG
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#include <png.h>
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#endif
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#include "snes9x.h"
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#include "memmap.h"
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#include "display.h"
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#include "screenshot.h"
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bool8 S9xDoScreenshot (int width, int height)
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{
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Settings.TakeScreenshot = FALSE;
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#ifdef HAVE_LIBPNG
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FILE *fp;
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png_structp png_ptr;
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png_infop info_ptr;
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png_color_8 sig_bit;
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int imgwidth, imgheight;
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const char *fname;
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fname = S9xGetFilenameInc(".png", SCREENSHOT_DIR);
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fp = fopen(fname, "wb");
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if (!fp)
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{
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S9xMessage(S9X_ERROR, 0, "Failed to take screenshot.");
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return (FALSE);
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}
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr)
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{
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fclose(fp);
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remove(fname);
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S9xMessage(S9X_ERROR, 0, "Failed to take screenshot.");
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return (FALSE);
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr)
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{
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png_destroy_write_struct(&png_ptr, (png_infopp) NULL);
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fclose(fp);
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remove(fname);
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S9xMessage(S9X_ERROR, 0, "Failed to take screenshot.");
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return (FALSE);
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}
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if (setjmp(png_jmpbuf(png_ptr)))
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{
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png_destroy_write_struct(&png_ptr, &info_ptr);
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fclose(fp);
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remove(fname);
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S9xMessage(S9X_ERROR, 0, "Failed to take screenshot.");
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return (FALSE);
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}
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imgwidth = width;
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imgheight = height;
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if (Settings.StretchScreenshots == 1)
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{
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if (width > SNES_WIDTH && height <= SNES_HEIGHT_EXTENDED)
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imgheight = height << 1;
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}
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else
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if (Settings.StretchScreenshots == 2)
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{
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if (width <= SNES_WIDTH)
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imgwidth = width << 1;
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if (height <= SNES_HEIGHT_EXTENDED)
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imgheight = height << 1;
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}
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png_init_io(png_ptr, fp);
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png_set_IHDR(png_ptr, info_ptr, imgwidth, imgheight, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
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sig_bit.red = 5;
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sig_bit.green = 5;
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sig_bit.blue = 5;
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png_set_sBIT(png_ptr, info_ptr, &sig_bit);
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png_set_shift(png_ptr, &sig_bit);
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png_write_info(png_ptr, info_ptr);
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png_set_packing(png_ptr);
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png_byte *row_pointer = new png_byte[png_get_rowbytes(png_ptr, info_ptr)];
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uint16 *screen = GFX.Screen;
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for (int y = 0; y < height; y++, screen += GFX.RealPPL)
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{
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png_byte *rowpix = row_pointer;
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for (int x = 0; x < width; x++)
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{
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uint32 r, g, b;
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DECOMPOSE_PIXEL(screen[x], r, g, b);
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*(rowpix++) = r;
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*(rowpix++) = g;
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*(rowpix++) = b;
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if (imgwidth != width)
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{
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*(rowpix++) = r;
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*(rowpix++) = g;
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*(rowpix++) = b;
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}
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}
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png_write_row(png_ptr, row_pointer);
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if (imgheight != height)
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png_write_row(png_ptr, row_pointer);
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}
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delete [] row_pointer;
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png_write_end(png_ptr, info_ptr);
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png_destroy_write_struct(&png_ptr, &info_ptr);
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fclose(fp);
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fprintf(stderr, "%s saved.\n", fname);
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const char *base = S9xBasename(fname);
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sprintf(String, "Saved screenshot %s", base);
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S9xMessage(S9X_INFO, 0, String);
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return (TRUE);
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#else
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fprintf(stderr, "Screenshot support not available (libpng was not found at build time).\n");
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return (FALSE);
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#endif
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}
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