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Add aPNG downscaling, and its associated consvar.

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This commit is contained in:
GoldenTails 2020-10-15 10:54:18 -05:00
parent 85c5fa9527
commit 949c0c181d
3 changed files with 31 additions and 8 deletions
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1
src/d_netcmd.c
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@ -669,6 +669,7 @@ void D_RegisterClientCommands(void)
CV_RegisterVar(&cv_zlib_strategya);
CV_RegisterVar(&cv_zlib_window_bitsa);
CV_RegisterVar(&cv_apng_delay);
CV_RegisterVar(&cv_apng_downscale);
// GIF variables
CV_RegisterVar(&cv_gif_optimize);
CV_RegisterVar(&cv_gif_downscale);

36
src/m_misc.c
View file

@ -163,6 +163,9 @@ consvar_t cv_zlib_levela = CVAR_INIT ("apng_compress_level", "4", CV_SAVE, zlib_
consvar_t cv_zlib_strategya = CVAR_INIT ("apng_strategy", "RLE", CV_SAVE, zlib_strategy_t, NULL);
consvar_t cv_zlib_window_bitsa = CVAR_INIT ("apng_window_size", "32k", CV_SAVE, zlib_window_bits_t, NULL);
consvar_t cv_apng_delay = CVAR_INIT ("apng_speed", "1x", CV_SAVE, apng_delay_t, NULL);
consvar_t cv_apng_downscale = CVAR_INIT ("apng_downscale", "On", CV_SAVE, CV_OnOff, NULL);
static boolean apng_downscale = false; // So nobody can do something dumb like changing cvars mid output
boolean takescreenshot = false; // Take a screenshot this tic
@ -981,25 +984,38 @@ static inline boolean M_PNGLib(void)
static void M_PNGFrame(png_structp png_ptr, png_infop png_info_ptr, png_bytep png_buf)
{
png_uint_16 downscale = apng_downscale ? vid.dupx : 1;
png_uint_32 pitch = png_get_rowbytes(png_ptr, png_info_ptr);
PNG_CONST png_uint_32 height = vid.height;
png_bytepp row_pointers = png_malloc(png_ptr, height* sizeof (png_bytep));
png_uint_32 y;
PNG_CONST png_uint_32 width = vid.width / downscale;
PNG_CONST png_uint_32 height = vid.height / downscale;
png_bytepp row_pointers = png_malloc(png_ptr, height * sizeof (png_bytep));
png_uint_32 x, y;
png_uint_16 framedelay = (png_uint_16)cv_apng_delay.value;
apng_frames++;
for (y = 0; y < height; y++)
{
row_pointers[y] = png_buf;
png_buf += pitch;
row_pointers[y] = malloc(pitch * sizeof(png_byte));
for (x = 0; x < width; x++)
row_pointers[y][x] = png_buf[x * downscale];
png_buf += pitch * (downscale * downscale);
}
//for (x = 0; x < width; x++)
//{
// printf("%d", x);
// row_pointers[y][x] = 0;
//}
/* row_pointers[y] = calloc(1, sizeof(png_bytep));
png_buf += pitch * 2;
}*/
#ifndef PNG_STATIC
if (aPNG_write_frame_head)
#endif
aPNG_write_frame_head(apng_ptr, apng_info_ptr, row_pointers,
vid.width, /* width */
width, /* width */
height, /* height */
0, /* x offset */
0, /* y offset */
@ -1030,6 +1046,12 @@ static void M_PNGfix_acTL(png_structp png_ptr, png_infop png_info_ptr,
static boolean M_SetupaPNG(png_const_charp filename, png_bytep pal)
{
png_uint_16 downscale;
apng_downscale = (!!cv_apng_downscale.value);
downscale = apng_downscale ? vid.dupx : 1;
apng_FILE = fopen(filename,"wb+"); // + mode for reading
if (!apng_FILE)
{
@ -1080,7 +1102,7 @@ static boolean M_SetupaPNG(png_const_charp filename, png_bytep pal)
png_set_compression_strategy(apng_ptr, cv_zlib_strategya.value);
png_set_compression_window_bits(apng_ptr, cv_zlib_window_bitsa.value);
M_PNGhdr(apng_ptr, apng_info_ptr, vid.width, vid.height, pal);
M_PNGhdr(apng_ptr, apng_info_ptr, vid.width / downscale, vid.height / downscale, pal);
M_PNGText(apng_ptr, apng_info_ptr, true);

2
src/m_misc.h
View file

@ -33,7 +33,7 @@ extern consvar_t cv_screenshot_option, cv_screenshot_folder, cv_screenshot_color
extern consvar_t cv_moviemode, cv_movie_folder, cv_movie_option;
extern consvar_t cv_zlib_memory, cv_zlib_level, cv_zlib_strategy, cv_zlib_window_bits;
extern consvar_t cv_zlib_memorya, cv_zlib_levela, cv_zlib_strategya, cv_zlib_window_bitsa;
extern consvar_t cv_apng_delay;
extern consvar_t cv_apng_delay, cv_apng_downscale;
void M_StartMovie(void);
void M_SaveFrame(void);