gdispImageError gdispGImageDraw_NATIVE(GDisplay *g, gdispImage *img, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t sx, coord_t sy) {
coord_t mx, mcx;
size_t pos, len;
gdispImagePrivate_NATIVE * priv;
priv = (gdispImagePrivate_NATIVE *)img->priv;
/* Check some reasonableness */
if (sx >= img->width || sy >= img->height) return GDISP_IMAGE_ERR_OK;
if (sx + cx > img->width) cx = img->width - sx;
if (sy + cy > img->height) cy = img->height - sy;
/* Draw from the image cache - if it exists */
if (priv->frame0cache) {
gdispGBlitArea(g, x, y, cx, cy, sx, sy, img->width, priv->frame0cache);
return GDISP_IMAGE_ERR_OK;
}
/* For this image decoder we cheat and just seek straight to the region we want to display */
pos = FRAME0POS_NATIVE + (img->width * sy + sx) * sizeof(pixel_t);
/* Cycle through the lines */
for(;cy;cy--, y++) {
/* Move to the start of the line */
gfileSetPos(img->f, pos);
/* Draw the line in chunks using BitBlt */
for(mx = x, mcx = cx; mcx > 0; mcx -= len, mx += len) {
// Read the data
len = gfileRead(img->f,
priv->buf,
mcx > BLIT_BUFFER_SIZE_NATIVE ? (BLIT_BUFFER_SIZE_NATIVE*sizeof(pixel_t)) : (mcx * sizeof(pixel_t)))
/ sizeof(pixel_t);
if (!len)
return GDISP_IMAGE_ERR_BADDATA;
/* Blit the chunk of data */
gdispGBlitArea(g, mx, y, len, 1, 0, 0, len, priv->buf);
}
/* Get the position for the start of the next line */
pos += img->width*sizeof(pixel_t);
}
return GDISP_IMAGE_ERR_OK;
}
bool lcd_keyframe_draw_logo(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)state;
(void)animation;
// Read the uGFX documentation for information how to use the displays
// http://wiki.ugfx.org/index.php/Main_Page
gdispClear(White);
// You can use static variables for things that can't be found in the animation
// or state structs, here we use the image
//gdispGBlitArea is a tricky function to use since it supports blitting part of the image
// if you have full screen image, then just use LCD_WIDTH and LCD_HEIGHT for both source and target dimensions
gdispGBlitArea(GDISP, 0, 0, LCD_WIDTH, LCD_HEIGHT, 0, 0, LCD_WIDTH, (pixel_t*)resource_lcd_logo);
return false;
}