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Make scaler output truly pluggable, add an 8-bit greyscale output to

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pluginlib for use with greylib, and add source for a test scaled bmp
viewer using greylib.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19593 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2008-12-26 07:05:13 +00:00
parent f7fa7e5ad5
commit 9058620849
17 changed files with 88 additions and 42 deletions
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19
apps/plugins/lib/grey_draw.c
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@ -669,3 +669,22 @@ void grey_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
{
grey_ub_gray_bitmap_part(src, 0, 0, width, x, y, width, height);
}
static void output_row_grey(uint32_t row, void * row_in, struct scaler_context *ctx)
{
int col;
uint32_t *qp = (uint32_t*)row_in;
uint8_t *dest = (uint8_t*)ctx->bm->data + ctx->bm->width * row;
for (col = 0; col < ctx->bm->width; col++)
*dest++ = ((*qp++) + ctx->round) * (uint64_t)ctx->divisor >> 32;
}
static unsigned int get_size_grey(struct bitmap *bm)
{
return bm->width * bm->height;
}
const struct custom_format format_grey = {
.output_row = output_row_grey,
.get_size = get_size_grey
};