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Player graphics library: fixed and more robust bounds check, added bitmap drawing.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6139 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2005-03-05 11:31:43 +00:00
parent b0f57cb88e
commit 75640f45eb
2 changed files with 40 additions and 7 deletions
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45
apps/plugins/lib/playergfx.c
View file

@ -28,8 +28,8 @@
static struct plugin_api *pgfx_rb = NULL; /* global api struct pointer */
static int char_width;
static int char_height;
static int pixel_height;
static int pixel_width;
static unsigned pixel_height;
static unsigned pixel_width;
static unsigned char gfx_chars[8];
static unsigned char gfx_buffer[56];
@ -200,14 +200,12 @@ void pgfx_invertrect (int x, int y, int nx, int ny)
{
int i, j;
if (x > pixel_width)
return;
if (y > pixel_height)
if (((unsigned) x >= pixel_width) || ((unsigned) y >= pixel_height))
return;
if (x + nx > pixel_width)
if ((unsigned)(x + nx) > pixel_width)
nx = pixel_width - x;
if (y + ny > pixel_height)
if ((unsigned)(y + ny) > pixel_height)
ny = pixel_height - y;
for (i = 0; i < nx; i++)
@ -215,4 +213,37 @@ void pgfx_invertrect (int x, int y, int nx, int ny)
pgfx_invertpixel(x + i, y + j);
}
void pgfx_bitmap (const unsigned char *src, int x, int y, int nx, int ny,
bool clear)
{
int stride, i, j;
unsigned data;
if (((unsigned) x >= pixel_width) || ((unsigned) y >= pixel_height))
return;
stride = nx; /* otherwise right-clipping will destroy the image */
if (((unsigned)(x + nx)) >= pixel_width)
nx = pixel_width - x;
if (((unsigned)(y + ny)) >= pixel_height)
ny = pixel_height - y;
for (i = 0; i < nx; i++, src++)
{
data = src[0];
if (ny > 8) /* ny is max. 14 */
data |= src[stride] << 8;
for (j = 0; j < ny; j++)
{
if (data & 1)
pgfx_drawpixel(x + i, y + j);
else
if (clear)
pgfx_clearpixel(x + i, y + j);
data >>= 1;
}
}
}
#endif /* HAVE_LCD_CHARCELLS */

2
apps/plugins/lib/playergfx.h
View file

@ -38,6 +38,8 @@ void pgfx_drawline(int x1, int y1, int x2, int y2);
void pgfx_clearline(int x1, int y1, int x2, int y2);
void pgfx_invertline(int x1, int y1, int x2, int y2);
void pgfx_invertrect (int x, int y, int nx, int ny);
void pgfx_bitmap (const unsigned char *src, int x, int y, int nx, int ny,
bool clear);
#endif /* HAVE_LCD_CHARCELLS */
#endif /* __PGFX_H__ */