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* grub-core/video/bitmap_scale.c: Use unsigned arithmetics when 

appropriate.
This commit is contained in:
Vladimir Serbinenko 2013-10-25 21:39:00 +02:00
parent d43c64899d
commit 3523b8d8a7
2 changed files with 47 additions and 30 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2013-10-25 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/bitmap_scale.c: Use unsigned arithmetics when
appropriate.
2013-10-25 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/fb/fbblit.c: Use (255 ^ x) rather than (255 - x).

72
grub-core/video/bitmap_scale.c
View File

@ -123,10 +123,16 @@ grub_video_bitmap_create_scaled (struct grub_video_bitmap **dst,
}
static grub_err_t
make_h_align (int *x, int *w, int new_w,
make_h_align (unsigned *x, unsigned *w, unsigned new_w,
grub_video_bitmap_h_align_t h_align)
{
grub_err_t ret = GRUB_ERR_NONE;
if (new_w >= *w)
{
*x = 0;
*w = new_w;
return GRUB_ERR_NONE;
}
switch (h_align)
{
case GRUB_VIDEO_BITMAP_H_ALIGN_LEFT:
@ -147,10 +153,16 @@ make_h_align (int *x, int *w, int new_w,
}
static grub_err_t
make_v_align (int *y, int *h, int new_h,
make_v_align (unsigned *y, unsigned *h, unsigned new_h,
grub_video_bitmap_v_align_t v_align)
{
grub_err_t ret = GRUB_ERR_NONE;
if (new_h >= *h)
{
*y = 0;
*h = new_h;
return GRUB_ERR_NONE;
}
switch (v_align)
{
case GRUB_VIDEO_BITMAP_V_ALIGN_TOP:
@ -194,14 +206,14 @@ grub_video_bitmap_scale_proportional (struct grub_video_bitmap **dst,
if (ret != GRUB_ERR_NONE)
return ret; /* Error. */
int dx0 = 0;
int dy0 = 0;
int dw = dst_width;
int dh = dst_height;
int sx0 = 0;
int sy0 = 0;
int sw = src->mode_info.width;
int sh = src->mode_info.height;
unsigned dx0 = 0;
unsigned dy0 = 0;
unsigned dw = dst_width;
unsigned dh = dst_height;
unsigned sx0 = 0;
unsigned sy0 = 0;
unsigned sw = src->mode_info.width;
unsigned sh = src->mode_info.height;
switch (selection_method)
{
@ -345,26 +357,26 @@ scale_nn (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
grub_uint8_t *ddata = dst->data;
grub_uint8_t *sdata = src->data;
int dw = dst->mode_info.width;
int dh = dst->mode_info.height;
int sw = src->mode_info.width;
int sh = src->mode_info.height;
int dstride = dst->mode_info.pitch;
int sstride = src->mode_info.pitch;
unsigned dw = dst->mode_info.width;
unsigned dh = dst->mode_info.height;
unsigned sw = src->mode_info.width;
unsigned sh = src->mode_info.height;
unsigned dstride = dst->mode_info.pitch;
unsigned sstride = src->mode_info.pitch;
/* bytes_per_pixel is the same for both src and dst. */
int bytes_per_pixel = dst->mode_info.bytes_per_pixel;
unsigned bytes_per_pixel = dst->mode_info.bytes_per_pixel;
int dy;
unsigned dy;
for (dy = 0; dy < dh; dy++)
{
int dx;
unsigned dx;
for (dx = 0; dx < dw; dx++)
{
grub_uint8_t *dptr;
grub_uint8_t *sptr;
int sx;
int sy;
int comp;
unsigned sx;
unsigned sy;
unsigned comp;
/* Compute the source coordinate that the destination coordinate
maps to. Note: sx/sw = dx/dw => sx = sw*dx/dw. */
@ -402,25 +414,25 @@ scale_bilinear (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
grub_uint8_t *ddata = dst->data;
grub_uint8_t *sdata = src->data;
int dw = dst->mode_info.width;
int dh = dst->mode_info.height;
int sw = src->mode_info.width;
int sh = src->mode_info.height;
unsigned dw = dst->mode_info.width;
unsigned dh = dst->mode_info.height;
unsigned sw = src->mode_info.width;
unsigned sh = src->mode_info.height;
int dstride = dst->mode_info.pitch;
int sstride = src->mode_info.pitch;
/* bytes_per_pixel is the same for both src and dst. */
int bytes_per_pixel = dst->mode_info.bytes_per_pixel;
int dy;
unsigned dy;
for (dy = 0; dy < dh; dy++)
{
int dx;
unsigned dx;
for (dx = 0; dx < dw; dx++)
{
grub_uint8_t *dptr;
grub_uint8_t *sptr;
int sx;
int sy;
unsigned sx;
unsigned sy;
int comp;
/* Compute the source coordinate that the destination coordinate