有时我们希望实现在大分辨率的屏上显示小分辨率的android界面。

实际代码修改如下：

--- a/kernel/msm-3.18/drivers/video/msm/mdss/mdss_fb.c

+++ b/kernel/msm-3.18/drivers/video/msm/mdss/mdss_fb.c

@@ -2501,8 +2501,8 @@ static int mdss_fb_register(struct msm_fb_data_type *mfd)

else

fix->line_length = var->xres * bpp;

- var->xres_virtual = var->xres;

- var->yres_virtual = panel_info->yres * mfd->fb_page;

+ var->xres_virtual = 640;//var->xres;

+ var->yres_virtual = 480 * mfd->fb_page;

var->bits_per_pixel = bpp * 8; /* FrameBuffer color depth */

/*

@@ -3410,8 +3410,8 @@ void mdss_panelinfo_to_fb_var(struct mdss_panel_info *pinfo,

{

u32 frame_rate;

- var->xres = mdss_fb_get_panel_xres(pinfo);

- var->yres = pinfo->yres;

+ var->xres = 640;//mdss_fb_get_panel_xres(pinfo);

+ var->yres = 480;//pinfo->yres;

var->lower_margin = pinfo->lcdc.v_front_porch -

pinfo->prg_fet;

var->upper_margin = pinfo->lcdc.v_back_porch +

显示屏的实际分辨率为1366x768

显示效果图;