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Commit c560a67b authored by Doug Zongker's avatar Doug Zongker
Browse files

add optional overscan compensation to recovery graphics 

If your screen is a TV, it may not actually be displaying the edges of
the framebuffer.  Allow specifying an overscan percentage, and move
each edge of the framebuffer in by that percent of the width/height.
(The gr_* layer just lies to the caller about the size of the
framebuffer, telling the caller it's smaller than it really is, and
offsets all drawing commands to match.)

Change-Id: I11bb2feb39ae522bd3e957a14ebdecf3609e0fdc
parent bb01d0c1

minui/Android.mk

+6 −0
Original line number Diff line number Diff line
@@ -20,4 +20,10 @@ ifeq ($(subst ",,$(TARGET_RECOVERY_PIXEL_FORMAT)),BGRA_8888) 
  LOCAL_CFLAGS += -DRECOVERY_BGRA

endif



ifneq ($(TARGET_RECOVERY_OVERSCAN_PERCENT),)

  LOCAL_CFLAGS += -DOVERSCAN_PERCENT=$(TARGET_RECOVERY_OVERSCAN_PERCENT)

else

  LOCAL_CFLAGS += -DOVERSCAN_PERCENT=0

endif



include $(BUILD_STATIC_LIBRARY)

minui/graphics.c

+25 −4
Original line number Diff line number Diff line
@@ -60,6 +60,9 @@ static GGLSurface gr_framebuffer[NUM_BUFFERS]; 
static GGLSurface gr_mem_surface;

static unsigned gr_active_fb = 0;

static unsigned double_buffering = 0;

static int overscan_percent = OVERSCAN_PERCENT;

static int overscan_offset_x = 0;

static int overscan_offset_y = 0;



static int gr_fb_fd = -1;

static int gr_vt_fd = -1;
@@ -132,6 +135,9 @@ static int get_framebuffer(GGLSurface *fb) 
        return -1;

    }



    overscan_offset_x = vi.xres * overscan_percent / 100;

    overscan_offset_y = vi.yres * overscan_percent / 100;



    fb->version = sizeof(*fb);

    fb->width = vi.xres;

    fb->height = vi.yres;
@@ -224,6 +230,9 @@ int gr_text(int x, int y, const char *s) 
    GRFont *font = gr_font;

    unsigned off;



    x += overscan_offset_x;

    y += overscan_offset_y;



    y -= font->ascent;



    gl->bindTexture(gl, &font->texture);
@@ -250,6 +259,9 @@ void gr_texticon(int x, int y, gr_surface icon) { 
    }

    GGLContext* gl = gr_context;



    x += overscan_offset_x;

    y += overscan_offset_y;



    gl->bindTexture(gl, (GGLSurface*) icon);

    gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);

    gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
@@ -263,11 +275,17 @@ void gr_texticon(int x, int y, gr_surface icon) { 
    gl->recti(gl, x, y, x+gr_get_width(icon), y+gr_get_height(icon));

}



void gr_fill(int x, int y, int w, int h)

void gr_fill(int x1, int y1, int x2, int y2)

{

    x1 += overscan_offset_x;

    y1 += overscan_offset_y;



    x2 += overscan_offset_x;

    y2 += overscan_offset_y;



    GGLContext *gl = gr_context;

    gl->disable(gl, GGL_TEXTURE_2D);

    gl->recti(gl, x, y, w, h);

    gl->recti(gl, x1, y1, x2, y2);

}



void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
@@ -276,6 +294,9 @@ void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) { 
    }

    GGLContext *gl = gr_context;



    dx += overscan_offset_x;

    dy += overscan_offset_y;



    gl->bindTexture(gl, (GGLSurface*) source);

    gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);

    gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
@@ -385,12 +406,12 @@ void gr_exit(void) 


int gr_fb_width(void)

{

    return gr_framebuffer[0].width;

    return gr_framebuffer[0].width - 2*overscan_offset_x;

}



int gr_fb_height(void)

{

    return gr_framebuffer[0].height;

    return gr_framebuffer[0].height - 2*overscan_offset_y;

}



gr_pixel *gr_fb_data(void)

minui/minui.h

+1 −1
Original line number Diff line number Diff line
@@ -36,7 +36,7 @@ void gr_flip(void); 
void gr_fb_blank(bool blank);



void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);

void gr_fill(int x, int y, int w, int h);

void gr_fill(int x1, int y1, int x2, int y2);

int gr_text(int x, int y, const char *s);

 void gr_texticon(int x, int y, gr_surface icon);

int gr_measure(const char *s);