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jpeg: Use gdk_memory_texture_from_texture()

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This commit is contained in:
Benjamin Otte 2021-10-17 22:15:53 +02:00
parent 800246402f
commit 7eceed8d4d
1 changed files with 12 additions and 39 deletions
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51
gdk/loaders/gdkjpeg.c
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@ -74,38 +74,6 @@ output_message_handler (j_common_ptr cinfo)
/* }}} */
/* {{{ Format conversion */
static void
convert_rgba_to_rgb (guchar *data,
int width,
int height,
int stride)
{
gsize x, y;
guchar *src, *dest;
for (y = 0; y < height; y++)
{
src = data;
dest = data;
for (x = 0; x < width; x++)
{
guint32 pixel;
memcpy (&pixel, src, sizeof (guint32));
dest[0] = (pixel & 0x00ff0000) >> 16;
dest[1] = (pixel & 0x0000ff00) >> 8;
dest[2] = (pixel & 0x000000ff) >> 0;
dest += 3;
src += 4;
}
data += stride;
}
}
static void
convert_grayscale_to_rgb (guchar *data,
int width,
@ -274,11 +242,14 @@ gdk_save_jpeg (GdkTexture *texture)
struct jpeg_compress_struct info;
struct error_handler_data jerr;
struct jpeg_error_mgr err;
guchar *data = NULL;
guchar *data;
gulong size = 0;
guchar *input = NULL;
GdkMemoryTexture *memtex = NULL;
const guchar *texdata;
gsize texstride;
guchar *row;
int width, height, stride;
int width, height;
width = gdk_texture_get_width (texture);
height = gdk_texture_get_height (texture);
@ -293,6 +264,7 @@ gdk_save_jpeg (GdkTexture *texture)
free (data);
g_free (input);
jpeg_destroy_compress (&info);
g_clear_object (&memtex);
return NULL;
}
@ -308,21 +280,22 @@ gdk_save_jpeg (GdkTexture *texture)
jpeg_mem_dest (&info, &data, &size);
stride = width * 4;
input = g_malloc (stride * height);
gdk_texture_download (texture, input, stride);
convert_rgba_to_rgb (data, width, height, stride);
memtex = gdk_memory_texture_from_texture (texture,
GDK_MEMORY_R8G8B8);
texdata = gdk_memory_texture_get_data (memtex);
texstride = gdk_memory_texture_get_stride (memtex);
jpeg_start_compress (&info, TRUE);
while (info.next_scanline < info.image_height)
{
row = &input[info.next_scanline * stride];
row = (guchar *) texdata + info.next_scanline * texstride;
jpeg_write_scanlines (&info, &row, 1);
}
jpeg_finish_compress (&info);
g_object_unref (memtex);
g_free (input);
jpeg_destroy_compress (&info);