rtt-f030/rtgui/common/image_hdc.c

241 lines
5.8 KiB
C

#include <rtthread.h>
#include <rtgui/image.h>
#include <rtgui/rtgui_system.h>
#define HDC_MAGIC_LEN 4
struct rtgui_image_hdc
{
rt_bool_t is_loaded;
struct rtgui_filerw* filerw;
struct rtgui_graphic_driver* hw_driver;
/* hdc image information */
rt_uint16_t byte_per_pixel;
rt_uint16_t pitch;
rt_size_t pixel_offset;
rt_uint8_t *pixels;
};
static rt_bool_t rtgui_image_hdc_check(struct rtgui_filerw* file);
static rt_bool_t rtgui_image_hdc_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load);
static void rtgui_image_hdc_unload(struct rtgui_image* image);
static void rtgui_image_hdc_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect);
struct rtgui_image_engine rtgui_image_hdc_engine =
{
"hdc",
{ RT_NULL },
rtgui_image_hdc_check,
rtgui_image_hdc_load,
rtgui_image_hdc_unload,
rtgui_image_hdc_blit
};
static rt_bool_t rtgui_image_hdc_check(struct rtgui_filerw* file)
{
int start;
rt_bool_t is_HDC;
rt_uint8_t magic[4];
if ( !file ) return 0;
start = rtgui_filerw_tell(file);
/* move to the beginning of file */
rtgui_filerw_seek(file, 0, RTGUI_FILE_SEEK_SET);
is_HDC = RT_FALSE;
if ( rtgui_filerw_read(file, magic, 1, sizeof(magic)) == sizeof(magic) )
{
if ( magic[0] == 'H' &&
magic[1] == 'D' &&
magic[2] == 'C' &&
magic[3] == '\0' )
{
is_HDC = RT_TRUE;
}
}
rtgui_filerw_seek(file, start, RTGUI_FILE_SEEK_SET);
return(is_HDC);
}
static rt_bool_t rtgui_image_hdc_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load)
{
rt_uint32_t header[5];
struct rtgui_image_hdc* hdc;
hdc = (struct rtgui_image_hdc*) rtgui_malloc(sizeof(struct rtgui_image_hdc));
if (hdc == RT_NULL) return RT_FALSE;
hdc->hw_driver = rtgui_graphic_driver_get_default();
if (hdc->hw_driver == RT_NULL) { rtgui_free(hdc); return RT_FALSE; }
rtgui_filerw_read(file, (char*)&header, 1, sizeof(header));
/* set image information */
image->w = (rt_uint16_t)header[1]; image->h = (rt_uint16_t)header[2];
image->engine = &rtgui_image_hdc_engine;
image->data = hdc;
hdc->filerw = file;
hdc->byte_per_pixel = hdc->hw_driver->byte_per_pixel;
hdc->pitch = image->w * hdc->byte_per_pixel;
hdc->pixel_offset = rtgui_filerw_tell(file);
if (load == RT_TRUE)
{
/* load all pixels */
hdc->pixels = rtgui_malloc(image->h * hdc->pitch);
if (hdc->pixels == RT_NULL)
{
/* release data */
rtgui_free(hdc);
return RT_FALSE;
}
rtgui_filerw_read(hdc->filerw, hdc->pixels, 1, image->h * hdc->pitch);
rtgui_filerw_close(hdc->filerw);
hdc->filerw = RT_NULL;
hdc->pixel_offset = 0;
}
else
{
hdc->pixels = RT_NULL;
}
return RT_TRUE;
}
static void rtgui_image_hdc_unload(struct rtgui_image* image)
{
struct rtgui_image_hdc* hdc;
if (image != RT_NULL)
{
hdc = (struct rtgui_image_hdc*) image->data;
if (hdc->pixels != RT_NULL) rtgui_free(hdc->pixels);
if (hdc->filerw != RT_NULL)
{
rtgui_filerw_close(hdc->filerw);
hdc->filerw = RT_NULL;
}
/* release data */
rtgui_free(hdc);
}
}
static void rtgui_image_hdc_raw_hline(struct rtgui_dc_hw* dc, rt_uint8_t* raw_ptr, int x1, int x2, int y)
{
register rt_base_t index;
register rt_base_t bpp;
/* convert logic to device */
x1 = x1 + dc->owner->extent.x1;
x2 = x2 + dc->owner->extent.x1;
y = y + dc->owner->extent.y1;
bpp = dc->device->byte_per_pixel;
if (dc->owner->clip.data == RT_NULL)
{
rtgui_rect_t* prect;
prect = &(dc->owner->clip.extents);
/* calculate hline intersect */
if (prect->y1 > y || prect->y2 <= y ) return;
if (prect->x2 <= x1 || prect->x1 > x2) return;
if (prect->x1 > x1) x1 = prect->x1;
if (prect->x2 < x2) x2 = prect->x2;
/* draw raw hline */
dc->device->draw_raw_hline(raw_ptr, x1, x2, y);
}
else for (index = 0; index < rtgui_region_num_rects(&(dc->owner->clip)); index ++)
{
rtgui_rect_t* prect;
register rt_base_t draw_x1, draw_x2;
prect = ((rtgui_rect_t *)(dc->owner->clip.data + index + 1));
draw_x1 = x1;
draw_x2 = x2;
/* calculate hline clip */
if (prect->y1 > y || prect->y2 <= y ) continue;
if (prect->x2 <= x1 || prect->x1 > x2) continue;
if (prect->x1 > x1) draw_x1 = prect->x1;
if (prect->x2 < x2) draw_x2 = prect->x2;
/* draw raw hline */
dc->device->draw_raw_hline(raw_ptr + (draw_x1 - x1) * bpp, draw_x1, draw_x2, y);
}
}
static void rtgui_image_hdc_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* dst_rect)
{
rt_uint16_t y, w, h;
struct rtgui_image_hdc* hdc;
RT_ASSERT(image != RT_NULL || dc != RT_NULL || dst_rect != RT_NULL);
/* this dc is not visible */
if (dc->get_visible(dc) != RT_TRUE) return;
hdc = (struct rtgui_image_hdc*) image->data;
RT_ASSERT(hdc != RT_NULL);
if (dc->type != RTGUI_DC_HW) return;
/* the minimum rect */
if (image->w < rtgui_rect_width(*dst_rect)) w = image->w;
else w = rtgui_rect_width(*dst_rect);
if (image->h < rtgui_rect_height(*dst_rect)) h = image->h;
else h = rtgui_rect_height(*dst_rect);
if (hdc->pixels != RT_NULL)
{
rt_uint8_t* ptr;
/* get pixel pointer */
ptr = hdc->pixels;
for (y = 0; y < h; y ++)
{
rtgui_image_hdc_raw_hline((struct rtgui_dc_hw*)dc, ptr, dst_rect->x1, dst_rect->x2, dst_rect->y1 + y);
ptr += hdc->pitch;
}
}
else
{
rt_uint8_t* ptr;
ptr = rtgui_malloc(hdc->pitch);
if (ptr == RT_NULL) return; /* no memory */
/* seek to the begin of pixel data */
rtgui_filerw_seek(hdc->filerw, hdc->pixel_offset, RTGUI_FILE_SEEK_SET);
for (y = 0; y < h; y ++)
{
/* read pixel data */
if (rtgui_filerw_read(hdc->filerw, ptr, 1, hdc->pitch) != hdc->pitch)
break; /* read data failed */
rtgui_image_hdc_raw_hline((struct rtgui_dc_hw*)dc, ptr, dst_rect->x1, dst_rect->x1 + w, dst_rect->y1 + y);
}
rtgui_free(ptr);
}
}
void rtgui_image_hdc_init()
{
/* register hdc on image system */
rtgui_image_register_engine(&rtgui_image_hdc_engine);
}