From deb6ac3693a6fb5c47abd0c32f966f5e38b6a68a Mon Sep 17 00:00:00 2001 From: Thomas Martitz Date: Tue, 16 Apr 2013 23:50:43 +0200 Subject: lcd-16bit: Move lcd_gradient_fillrect/_part() to lcd-16bit-common.c. Change-Id: I6b2d2ba73464610556cfd9ecec52fc62adb007c7 --- firmware/drivers/lcd-16bit-common.c | 66 +++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) (limited to 'firmware/drivers/lcd-16bit-common.c') diff --git a/firmware/drivers/lcd-16bit-common.c b/firmware/drivers/lcd-16bit-common.c index 99cbe489fc..9d36499418 100644 --- a/firmware/drivers/lcd-16bit-common.c +++ b/firmware/drivers/lcd-16bit-common.c @@ -1362,3 +1362,69 @@ void lcd_blit_yuv(unsigned char * const src[3], lcd_update_rect(LCD_WIDTH - y - height, x, height, width); #endif } + +/* Fill a rectangle with a gradient. This function draws only the partial + * gradient. It assumes the original gradient is src_height high and skips + * the first few rows. This is useful for drawing only the bottom half of + * a full gradient. + * + * height == src_height and row_skip == 0 will draw the full gradient + * + * x, y, width, height - dimensions describing the rectangle + * start_rgb - beginning color of the gradient + * end_rgb - end color of the gradient + * src_height - assumed original height (only height rows will be drawn) + * row_skip - how many rows of the original gradient to skip + */ +void lcd_gradient_fillrect_part(int x, int y, int width, int height, + unsigned start_rgb, unsigned end_rgb, int src_height, int row_skip) +{ + int old_pattern = current_vp->fg_pattern; + int step_mul, i; + int x1, x2; + x1 = x; + x2 = x + width; + + if (height == 0) return; + + step_mul = (1 << 16) / src_height; + int h_r = RGB_UNPACK_RED(start_rgb); + int h_g = RGB_UNPACK_GREEN(start_rgb); + int h_b = RGB_UNPACK_BLUE(start_rgb); + int rstep = (h_r - RGB_UNPACK_RED(end_rgb)) * step_mul; + int gstep = (h_g - RGB_UNPACK_GREEN(end_rgb)) * step_mul; + int bstep = (h_b - RGB_UNPACK_BLUE(end_rgb)) * step_mul; + h_r = (h_r << 16) + (1 << 15); + h_g = (h_g << 16) + (1 << 15); + h_b = (h_b << 16) + (1 << 15); + + if (row_skip > 0) + { + h_r -= rstep * row_skip; + h_g -= gstep * row_skip; + h_b -= bstep * row_skip; + } + + for(i = y; i < y + height; i++) { + current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16); + lcd_hline(x1, x2, i); + h_r -= rstep; + h_g -= gstep; + h_b -= bstep; + } + + current_vp->fg_pattern = old_pattern; +} + +/* Fill a rectangle with a gradient. The gradient's color will fade from + * start_rgb to end_rgb over the height of the rectangle + * + * x, y, width, height - dimensions describing the rectangle + * start_rgb - beginning color of the gradient + * end_rgb - end color of the gradient + */ +void lcd_gradient_fillrect(int x, int y, int width, int height, + unsigned start_rgb, unsigned end_rgb) +{ + lcd_gradient_fillrect_part(x, y, width, height, start_rgb, end_rgb, height, 0); +} -- cgit v1.2.3