/** Add an image background to a screen.
@ingroup gui
@param scr Screen
@param filename file name of the bg image
@return None.
*/
void
GfuiScreenAddBgImg(void *scr, const char *filename)
{
tGfuiScreen *screen = (tGfuiScreen*)scr;
void *handle;
float screen_gamma;
GLbyte *tex;
int w,h;
const int BUFSIZE = 1024;
char buf[BUFSIZE];
if (glIsTexture(screen->bgImage) == GL_TRUE) {
glDeleteTextures(1, &screen->bgImage);
}
snprintf(buf, BUFSIZE, "%s%s", GetLocalDir(), GFSCR_CONF_FILE);
handle = GfParmReadFile(buf, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT);
screen_gamma = (float)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_GAMMA, (char*)NULL, 2.0);
tex = (GLbyte*)GfImgReadPng(filename, &w, &h, screen_gamma);
if (!tex) {
GfParmReleaseHandle(handle);
return;
}
glGenTextures(1, &screen->bgImage);
glBindTexture(GL_TEXTURE_2D, screen->bgImage);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)(tex));
free(tex);
GfParmReleaseHandle(handle);
}
bool grLoadPngTexture (const char *fname, ssgTextureInfo* info)
{
GLubyte *tex;
int w, h;
int mipmap = 1;
TRACE_GL("Load: grLoadPngTexture start");
tex = (GLubyte*)GfImgReadPng(fname, &w, &h, 2.0);
if (!tex) {
return false;
}
if (info) {
info -> width = w;
info -> height = h;
info -> depth = 4;
info -> alpha = true;
}
TRACE_GL("Load: grLoadPngTexture stop");
// TODO: Check if tex is freed.
// Check/fix potential problems related to malloc/delete mixture
// (instead of malloc/free or new/delete).
mipmap = doMipMap(fname, mipmap);
GLubyte* tex2 = new GLubyte[w*h*4];
memcpy(tex2, tex, w*h*4);
free(tex);
tex = tex2;
return grMakeMipMaps(tex, w, h, 4, mipmap);
}
