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update on blit function.

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@844 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
2010-08-11 09:48:21 +00:00
parent a385dc3940
commit 084a39897f
2 changed files with 48 additions and 88 deletions
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68
components/rtgui/common/blit.c
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@@ -27,18 +27,16 @@ static void rtgui_blit_line_3_1(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int li
/* 4 bpp to 1 bpp */
static void rtgui_blit_line_4_1(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
{
line = line / 4;
while (line)
{
*dst_ptr = (rt_uint8_t)(((*src_ptr & 0x00E00000)>>16)|
((*(src_ptr + 1) & 0x0000E000)>>11) |
((*(src_ptr + 2) & 0x000000C0)>>6));
src_ptr += 4;
dst_ptr ++;
line --;
struct _color {rt_uint8_t r, g, b, a;} *c;
c = (struct _color*)src_ptr;
while (line-- > 0)
{
*dst_ptr = (c->r & 0xe0) | (c->g & 0xc0) >> 3 | (c->b & 0xe0) >> 5 ;
c ++;
dst_ptr ++;
}
return;
}
/* 1 bpp to 2 bpp */
@@ -72,22 +70,20 @@ static void rtgui_blit_line_3_2(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int li
/* 4 bpp to 2 bpp */
static void rtgui_blit_line_4_2(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
{
rt_uint16_t* dst;
dst = (rt_uint16_t*)dst_ptr;
line = line / 4;
while (line)
{
*dst = (((*(src_ptr + 1) << 8) & 0x0000F800) |
((*(src_ptr + 1) << 3) & 0x000007E0) |
((*src_ptr >> 3) & 0x0000001F));
src_ptr += 4; /* skip alpha */
dst ++;
line --;
}
return;
struct _color {rt_uint8_t r, g, b, a;} *c;
rt_uint16_t* ptr;
c = (struct _color*)src_ptr;
ptr = (rt_uint16_t*)dst_ptr;
line = line / 4;
while (line-- > 0)
{
*ptr = ((c->r & 0xf8) << 8) | ((c->g & 0xfc) << 3) | (c->b >> 3);
c ++;
ptr ++;
}
}
static void rtgui_blit_line_1_3(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
@@ -253,11 +249,16 @@ void rtgui_blit_line_direct(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
rt_memcpy(dst_ptr, src_ptr, line);
}
/* convert 4bpp to 3bpp */
static void rtgui_blit_line_4_3(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
{
line = line / 4;
while (line)
{
*dst_ptr++ = *src_ptr++;
*dst_ptr++ = *src_ptr++;
*dst_ptr++ = *src_ptr++;
src_ptr ++;
line --;
}
}
@@ -270,9 +271,18 @@ static void rtgui_blit_line_2_4(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int li
{
}
/* convert 3bpp to 4bpp */
static void rtgui_blit_line_3_4(rt_uint8_t* dst_ptr, rt_uint8_t* src_ptr, int line)
{
line = line / 4;
while (line)
{
*dst_ptr++ = *src_ptr++;
*dst_ptr++ = *src_ptr++;
*dst_ptr++ = *src_ptr++;
*dst_ptr++ = 0;
line --;
}
}
static const rtgui_blit_line_func _blit_table[5][5] =
@@ -291,8 +301,8 @@ static const rtgui_blit_line_func _blit_table[5][5] =
const rtgui_blit_line_func rtgui_blit_line_get(int dst_bpp, int src_bpp)
{
RT_ASSERT(dst_bpp>1 && dst_bpp < 5);
RT_ASSERT(src_bpp>1 && src_bpp < 5);
RT_ASSERT(dst_bpp>0 && dst_bpp < 5);
RT_ASSERT(src_bpp>0 && src_bpp < 5);
return _blit_table[dst_bpp][src_bpp];
}