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-rw-r--r--minui/graphics.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/minui/graphics.c b/minui/graphics.c
index 05e8763..06c5fdf 100644
--- a/minui/graphics.c
+++ b/minui/graphics.c
@@ -43,6 +43,7 @@ static GRFont *gr_font = 0;
static GGLContext *gr_context = 0;
static GGLSurface gr_font_texture;
static GGLSurface gr_framebuffer[2];
+static GGLSurface gr_mem_surface;
static unsigned gr_active_fb = 0;
static int gr_fb_fd = -1;
@@ -55,7 +56,7 @@ static int get_framebuffer(GGLSurface *fb)
int fd;
struct fb_fix_screeninfo fi;
void *bits;
-
+
fd = open("/dev/graphics/fb0", O_RDWR);
if (fd < 0) {
perror("cannot open fb0");
@@ -87,9 +88,9 @@ static int get_framebuffer(GGLSurface *fb)
fb->stride = vi.xres;
fb->data = bits;
fb->format = GGL_PIXEL_FORMAT_RGB_565;
-
+
fb++;
-
+
fb->version = sizeof(*fb);
fb->width = vi.xres;
fb->height = vi.yres;
@@ -100,6 +101,15 @@ static int get_framebuffer(GGLSurface *fb)
return fd;
}
+static void get_memory_surface(GGLSurface* ms) {
+ ms->version = sizeof(*ms);
+ ms->width = vi.xres;
+ ms->height = vi.yres;
+ ms->stride = vi.xres;
+ ms->data = malloc(vi.xres * vi.yres * 2);
+ ms->format = GGL_PIXEL_FORMAT_RGB_565;
+}
+
static void set_active_framebuffer(unsigned n)
{
if (n > 1) return;
@@ -113,14 +123,16 @@ static void set_active_framebuffer(unsigned n)
void gr_flip(void)
{
GGLContext *gl = gr_context;
-
- /* currently active buffer becomes the backbuffer */
- gl->colorBuffer(gl, gr_framebuffer + gr_active_fb);
- /* swap front and back buffers */
+ /* swap front and back buffers */
gr_active_fb = (gr_active_fb + 1) & 1;
- /* inform the display driver */
+ /* copy data from the in-memory surface to the buffer we're about
+ * to make active. */
+ memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data,
+ vi.xres * vi.yres * 2);
+
+ /* inform the display driver */
set_active_framebuffer(gr_active_fb);
}
@@ -147,13 +159,13 @@ int gr_text(int x, int y, const char *s)
unsigned off;
y -= font->ascent;
-
+
gl->bindTexture(gl, &font->texture);
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);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
-
+
while((off = *s++)) {
off -= 32;
if (off < 96) {
@@ -209,10 +221,10 @@ static void gr_init_font(void)
unsigned char *in, data;
gr_font = calloc(sizeof(*gr_font), 1);
- ftex = &gr_font->texture;
+ ftex = &gr_font->texture;
bits = malloc(font.width * font.height);
-
+
ftex->version = sizeof(*ftex);
ftex->width = font.width;
ftex->height = font.height;
@@ -225,7 +237,7 @@ static void gr_init_font(void)
memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
bits += (data & 0x7f);
}
-
+
gr_font->cwidth = font.cwidth;
gr_font->cheight = font.cheight;
gr_font->ascent = font.cheight - 2;
@@ -254,13 +266,16 @@ int gr_init(void)
return -1;
}
+ get_memory_surface(&gr_mem_surface);
+
fprintf(stderr, "framebuffer: fd %d (%d x %d)\n",
gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height);
/* start with 0 as front (displayed) and 1 as back (drawing) */
gr_active_fb = 0;
set_active_framebuffer(0);
- gl->colorBuffer(gl, gr_framebuffer + 1);
+ gl->colorBuffer(gl, &gr_mem_surface);
+
gl->activeTexture(gl, 0);
gl->enable(gl, GGL_BLEND);
@@ -273,7 +288,9 @@ void gr_exit(void)
{
close(gr_fb_fd);
gr_fb_fd = -1;
-
+
+ free(gr_mem_surface.data);
+
ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
close(gr_vt_fd);
gr_vt_fd = -1;
@@ -291,5 +308,5 @@ int gr_fb_height(void)
gr_pixel *gr_fb_data(void)
{
- return (unsigned short *) gr_framebuffer[1 - gr_active_fb].data;
+ return (unsigned short *) gr_mem_surface.data;
}