void gr_exit(void)
{
// restore original vt mode (text or graphic)
if (gr_vt_mode != -1)
ioctl(gr_vt_fd, KDSETMODE, &gr_vt_mode);
// close tty
if (gr_vt_fd != -1) {
close(gr_vt_fd);
gr_vt_fd = -1;
}
// black screen before resolution change by bootanimation.
// both are required to prevent some weird bunnies display
gr_fb_clear(&gr_framebuffer[0]);
gr_fb_clear(&gr_framebuffer[1]);
set_final_framebuffer();
// free memory buffer
if (gr_mem_surface.version == sizeof(GGLSurface) && gr_mem_surface.data) {
free(gr_mem_surface.data);
gr_mem_surface.data = NULL;
}
gr_free_font();
// un-mmap
release_framebuffer(gr_framebuffer);
gglUninit(gr_context);
}
void gr_exit(void)
{
gglUninit(&gr_context);
close(gr_fb_fd);
gr_fb_fd = -1;
free(gr_mem_surface.data);
if (gr_vt_fd >= 0) {
ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
close(gr_vt_fd);
}
gr_vt_fd = -1;
}
int gr_save_screenshot(const char *dest)
{
uint32_t y, stride_bytes;
int res = -1;
GGLContext *gl = NULL;
GGLSurface surface;
uint8_t * volatile img_data = NULL;
uint8_t *ptr;
FILE *fp = NULL;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
fp = fopen(dest, "wb");
if(!fp)
goto exit;
img_data = malloc(vi.xres * vi.yres * 3);
surface.version = sizeof(surface);
surface.width = gr_mem_surface.width;
surface.height = gr_mem_surface.height;
surface.stride = gr_mem_surface.width;
surface.data = img_data;
surface.format = GGL_PIXEL_FORMAT_RGB_888;
gglInit(&gl);
gl->colorBuffer(gl, &surface);
gl->activeTexture(gl, 0);
gl->bindTexture(gl, &gr_mem_surface);
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);
gl->texCoord2i(gl, 0, 0);
gl->recti(gl, 0, 0, gr_mem_surface.width, gr_mem_surface.height);
gglUninit(gl);
gl = NULL;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
goto exit;
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
goto exit;
if (setjmp(png_jmpbuf(png_ptr)))
goto exit;
png_init_io(png_ptr, fp);
png_set_IHDR(png_ptr, info_ptr, surface.width, surface.height,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
ptr = img_data;
stride_bytes = surface.width*3;
for(y = 0; y < surface.height; ++y)
{
png_write_row(png_ptr, ptr);
ptr += stride_bytes;
}
png_write_end(png_ptr, NULL);
res = 0;
exit:
if(info_ptr)
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
if(png_ptr)
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
if(gl)
gglUninit(gl);
if(img_data)
free(img_data);
if(fp)
fclose(fp);
return res;
}
// Scale image function
int res_scale_surface(gr_surface source, gr_surface* destination, float scale_w, float scale_h) {
GGLContext *gl = NULL;
GGLSurface* sc_mem_surface = NULL;
*destination = NULL;
GGLSurface *surface = (GGLSurface*)source;
int w = gr_get_width(source), h = gr_get_height(source);
int sx = 0, sy = 0, dx = 0, dy = 0;
float dw = (float)w * scale_w;
float dh = (float)h * scale_h;
// Create a new surface that is the appropriate size
sc_mem_surface = init_display_surface((int)dw, (int)dh);
if (!sc_mem_surface) {
printf("gr_scale_surface failed to init_display_surface\n");
return -1;
}
sc_mem_surface->format = surface->format;
// Initialize the context
gglInit(&gl);
gl->colorBuffer(gl, sc_mem_surface);
gl->activeTexture(gl, 0);
// Enable or disable blending based on source surface format
if (surface->format == GGL_PIXEL_FORMAT_RGBX_8888) {
gl->disable(gl, GGL_BLEND);
} else {
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_ONE, GGL_ZERO);
}
// Bind our source surface to the context
gl->bindTexture(gl, surface);
// Deal with the scaling
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MIN_FILTER, GGL_LINEAR);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MAG_FILTER, GGL_LINEAR);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_S, GGL_CLAMP);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_T, GGL_CLAMP);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
gl->enable(gl, GGL_TEXTURE_2D);
int32_t grad[8];
memset(grad, 0, sizeof(grad));
// s, dsdx, dsdy, scale, t, dtdx, dtdy, tscale <- this is wrong!
// This api uses block floating-point for S and T texture coordinates.
// All values are given in 16.16, scaled by 'scale'. In other words,
// set scale to 0, for 16.16 values.
// s, dsdx, dsdy, t, dtdx, dtdy, sscale, tscale
float dsdx = (float)w / dw;
float dtdy = (float)h / dh;
grad[0] = ((float)sx - (dsdx * dx)) * 65536;
grad[1] = dsdx * 65536;
grad[3] = ((float)sy - (dtdy * dy)) * 65536;
grad[5] = dtdy * 65536;
// printf("blit: w=%d h=%d dx=%d dy=%d dw=%f dh=%f dsdx=%f dtdy=%f s0=%x dsdx=%x t0=%x dtdy=%x\n",
// w, h, dx, dy, dw, dh, dsdx, dtdy, grad[0], grad[1], grad[3], grad[5]);
gl->texCoordGradScale8xv(gl, 0 /*tmu*/, grad);
// draw / scale the source surface to our target context
gl->recti(gl, dx, dy, dx + dw, dy + dh);
gglUninit(gl);
gl = NULL;
// put the scaled surface in our destination
*destination = (gr_surface*) sc_mem_surface;
// free memory used in the source
res_free_surface(source);
source = NULL;
return 0;
}
