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112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "screenshot.h"
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#include "strl.h"
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#include <stdio.h>
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#include <time.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "general.h"
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// Simple 24bpp .BMP writer.
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static void write_header(FILE *file, unsigned width, unsigned height)
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{
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unsigned line_size = (width * 3 + 3) & ~3;
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unsigned size = line_size * height + 54;
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unsigned size_array = line_size * height;
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// Generic BMP stuff.
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const uint8_t header[] = {
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'B', 'M',
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(size >> 0) & 0xff, (size >> 8) & 0xff, (size >> 16) & 0xff, (size >> 24) & 0xff,
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0, 0, 0, 0,
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54, 0, 0, 0,
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40, 0, 0, 0,
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(width >> 0) & 0xff, (width >> 8) & 0xff, (width >> 16) & 0xff, (width >> 24) & 0xff,
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(height >> 0) & 0xff, (height >> 8) & 0xff, (height >> 16) & 0xff, (height >> 24) & 0xff,
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1, 0,
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24, 0,
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0, 0, 0, 0,
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(size_array >> 0) & 0xff, (size_array >> 8) & 0xff, (size_array >> 16) & 0xff, (size_array >> 24) & 0xff,
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19, 11, 0, 0,
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19, 11, 0, 0,
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0, 0, 0, 0,
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0, 0, 0, 0
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};
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fwrite(header, 1, sizeof(header), file);
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}
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static void dump_content(FILE *file, const uint16_t *frame, unsigned width, unsigned height, unsigned pitch)
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{
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pitch >>= 1;
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unsigned line_size = (width * 3 + 3) & ~3;
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uint8_t line[line_size];
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memset(line, 0, sizeof(line));
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// BMP likes reverse ordering for some reason :v
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for (int j = height - 1; j >= 0; j--)
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{
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uint8_t *dst = line;
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const uint16_t *src = frame + j * pitch;
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for (unsigned i = 0; i < width; i++)
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{
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uint16_t pixel = *src++;
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uint8_t b = (pixel & 0x1f) << 3;
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uint8_t g = (pixel & 0x03e0) >> 2;
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uint8_t r = (pixel & 0x7c00) >> 7;
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*dst++ = b;
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*dst++ = g;
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*dst++ = r;
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}
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fwrite(line, 1, sizeof(line), file);
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}
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}
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bool screenshot_dump(const char *folder, const uint16_t *frame,
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unsigned width, unsigned height, unsigned pitch)
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{
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time_t cur_time;
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time(&cur_time);
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char timefmt[128];
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strftime(timefmt, sizeof(timefmt), "SSNES-%m%d-%H%M%S.bmp", localtime(&cur_time));
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char filename[256];
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strlcpy(filename, folder, sizeof(filename));
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strlcat(filename, "/", sizeof(filename));
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strlcat(filename, timefmt, sizeof(filename));
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FILE *file = fopen(filename, "wb");
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if (!file)
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{
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SSNES_ERR("Failed to open file \"%s\" for screenshot.\n", filename);
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return false;
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}
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write_header(file, width, height);
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dump_content(file, frame, width, height, pitch);
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fclose(file);
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return true;
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}
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