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update bmp line blit. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@867 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong@gmail.com 2010-08-20 00:02:08 +00:00
parent 188bad3b6f
commit 2e117029e8
1 changed files with 156 additions and 56 deletions
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212
components/rtgui/common/image_bmp.c
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@ -30,6 +30,7 @@ struct rtgui_image_bmp
rt_uint8_t ExpandBMP;
rt_uint8_t *pixels;
rt_uint8_t *line_pixels;
rt_uint32_t pitch;
struct rtgui_filerw* filerw;
@ -387,12 +388,14 @@ static rt_bool_t rtgui_image_bmp_load(struct rtgui_image* image, struct rtgui_fi
}
rtgui_filerw_close(bmp->filerw);
bmp->line_pixels = RT_NULL;
bmp->filerw = RT_NULL;
bmp->pixel_offset = 0;
}
else
{
bmp->pixels = RT_NULL;
bmp->line_pixels = rtgui_malloc(bmp->pitch);
}
return RT_TRUE;
@ -420,6 +423,7 @@ static void rtgui_image_bmp_unload(struct rtgui_image* image)
bmp = (struct rtgui_image_bmp*) image->data;
if (bmp->pixels != RT_NULL) rtgui_free(bmp->pixels);
if (bmp->line_pixels != RT_NULL) rtgui_free(bmp->line_pixels);
if (bmp->filerw != RT_NULL)
{
rtgui_filerw_close(bmp->filerw);
@ -433,7 +437,8 @@ static void rtgui_image_bmp_unload(struct rtgui_image* image)
static void rtgui_image_bmp_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* dst_rect)
{
rt_uint16_t y, w, h;
int y;
rt_uint16_t w, h;
struct rtgui_image_bmp* bmp;
RT_ASSERT(image != RT_NULL || dc != RT_NULL || dst_rect != RT_NULL);
@ -456,59 +461,55 @@ static void rtgui_image_bmp_blit(struct rtgui_image* image, struct rtgui_dc* dc,
/* get pixel pointer */
ptr = bmp->pixels;
if ((dc->type == RTGUI_DC_HW) || (dc->type == RTGUI_DC_CLIENT))
if (bmp->byte_per_pixel == hw_driver->byte_per_pixel)
{
if (bmp->byte_per_pixel == hw_driver->byte_per_pixel)
for (y = 0; y < h; y ++)
{
for (y = 0; y < h; y ++)
dc->engine->blit_line(dc,
dst_rect->x1, dst_rect->x1 + w,
dst_rect->y1 + y,
ptr);
ptr += bmp->pitch;
}
}
else
{
rt_size_t pitch;
rt_uint8_t *line_ptr;
if (image->palette == RT_NULL)
{
rtgui_blit_line_func blit_line;
line_ptr = (rt_uint8_t*) rtgui_malloc(hw_driver->byte_per_pixel * w);
blit_line = rtgui_blit_line_get(hw_driver->byte_per_pixel , bmp->byte_per_pixel);
pitch = w * bmp->byte_per_pixel;
if (line_ptr != RT_NULL)
{
dc->engine->blit_line(dc,
dst_rect->x1, dst_rect->x1 + w,
dst_rect->y1 + y,
ptr);
ptr += bmp->pitch;
for (y = 0; y < h; y ++)
{
blit_line(line_ptr, ptr, pitch);
dc->engine->blit_line(dc,
dst_rect->x1, dst_rect->x1 + w,
dst_rect->y1 + y,
line_ptr);
ptr += bmp->pitch;
}
}
rtgui_free(line_ptr);
}
else
{
rt_size_t pitch;
rt_uint8_t *line_ptr;
int x;
rtgui_color_t color;
if (image->palette == RT_NULL)
/* use palette */
for (y = 0; y < h; y ++)
{
rtgui_blit_line_func blit_line;
line_ptr = (rt_uint8_t*) rtgui_malloc(hw_driver->byte_per_pixel * w);
blit_line = rtgui_blit_line_get(hw_driver->byte_per_pixel , bmp->byte_per_pixel);
pitch = w * bmp->byte_per_pixel;
if (line_ptr != RT_NULL)
ptr = bmp->pixels + (y * bmp->pitch);
for (x = 0; x < w; x ++)
{
for (y = 0; y < h; y ++)
{
blit_line(line_ptr, ptr, pitch);
dc->engine->blit_line(dc,
dst_rect->x1, dst_rect->x1 + w,
dst_rect->y1 + y,
line_ptr);
ptr += bmp->pitch;
}
}
rtgui_free(line_ptr);
}
else
{
int x, p;
rtgui_color_t color;
/* use palette */
for (y = 0; y < h; y ++)
{
ptr = bmp->pixels + (y * bmp->pitch);
for (x = 0; x < w; x ++)
{
p = *ptr;
color = image->palette->colors[*ptr]; ptr ++;
rtgui_dc_draw_color_point(dc, dst_rect->x1 + x, dst_rect->y1 + y, color);
}
color = image->palette->colors[*ptr]; ptr ++;
rtgui_dc_draw_color_point(dc, dst_rect->x1 + x, dst_rect->y1 + y, color);
}
}
}
@ -516,23 +517,122 @@ static void rtgui_image_bmp_blit(struct rtgui_image* image, struct rtgui_dc* dc,
}
else
{
rt_uint8_t* ptr;
ptr = rtgui_malloc(bmp->pitch);
if (ptr == RT_NULL) return; /* no memory */
int offset;
rt_uint8_t *bits;
/* seek to the begin of pixel data */
rtgui_filerw_seek(bmp->filerw, bmp->pixel_offset, RTGUI_FILE_SEEK_SET);
for (y = 0; y < h; y ++)
/* calculate offset */
switch (bmp->ExpandBMP)
{
/* read pixel data */
if (rtgui_filerw_read(bmp->filerw, ptr, 1, bmp->pitch) != bmp->pitch)
break; /* read data failed */
case 1:
offset = (image->h - h) * (image->w/8) * bmp->byte_per_pixel;
break;
dc->engine->blit_line(dc, dst_rect->x1, dst_rect->x1 + w, dst_rect->y1 + y, ptr);
case 4:
offset = (image->h - h) * (image->w/2) * bmp->byte_per_pixel;
break;
default:
offset = (image->h - h) * image->w * bmp->byte_per_pixel;
break;
}
/* seek to the begin of pixel data */
rtgui_filerw_seek(bmp->filerw, bmp->pixel_offset + offset, RTGUI_FILE_SEEK_SET);
rtgui_free(ptr);
if (bmp->ExpandBMP == 1 || bmp->ExpandBMP == 4)
{
int x;
rtgui_color_t color;
/* 1, 4 bit per pixels */
/* draw each line */
for (y = h - 1; y >= 0; y --)
{
/* read pixel data */
rt_uint8_t pixel = 0;
int shift = (8 - bmp->ExpandBMP);
int i;
bits = bmp->line_pixels;
for ( i=0; i < image->w; ++i )
{
if ( i % (8/bmp->ExpandBMP) == 0 )
{
if ( !rtgui_filerw_read(bmp->filerw, &pixel, 1, 1) )
return;
}
*(bits+i) = (pixel>>shift);
pixel <<= bmp->ExpandBMP;
}
/* Skip padding bytes */
if (bmp->pad)
{
int i;
rt_uint8_t padbyte;
for ( i=0; i < bmp->pad; ++i )
rtgui_filerw_read(bmp->filerw, &padbyte, 1, 1);
}
/* use palette */
bits = bmp->line_pixels;
for (x = 0; x < w; x ++)
{
color = image->palette->colors[*bits]; bits ++;
rtgui_dc_draw_color_point(dc, dst_rect->x1 + x, dst_rect->y1 + y, color);
}
}
}
else
{
rt_uint8_t *line_ptr = (rt_uint8_t*) rtgui_malloc(hw_driver->byte_per_pixel * w);
if (line_ptr == RT_NULL) return;
/* draw each line */
for (y = h - 1; y >= 0; y --)
{
/* read line pixels */
rtgui_filerw_read(bmp->filerw, bmp->line_pixels, 1, bmp->pitch);
/* Skip padding bytes */
if (bmp->pad)
{
int i;
rt_uint8_t padbyte;
for ( i=0; i < bmp->pad; ++i )
rtgui_filerw_read(bmp->filerw, &padbyte, 1, 1);
}
if (image->palette == RT_NULL)
{
int pitch;
rtgui_blit_line_func blit_line;
blit_line = rtgui_blit_line_get(hw_driver->byte_per_pixel , bmp->byte_per_pixel);
pitch = w * bmp->byte_per_pixel;
if (line_ptr != RT_NULL)
{
blit_line(line_ptr, bmp->line_pixels, pitch);
dc->engine->blit_line(dc,
dst_rect->x1, dst_rect->x1 + w,
dst_rect->y1 + y,
line_ptr);
}
}
else
{
int x;
rtgui_color_t color;
/* use palette */
bits = bmp->line_pixels;
for (x = 0; x < w; x ++)
{
color = image->palette->colors[*bits]; bits ++;
rtgui_dc_draw_color_point(dc, dst_rect->x1 + x, dst_rect->y1 + y, color);
}
}
}
if (line_ptr != RT_NULL) rtgui_free(line_ptr);
}
}
}