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#include "pixmap_texture.h"
#include <stdio.h>
bool ngxc_pixmap_texture_init(ngxc_pixmap_texture *window_texture, Display *display, Pixmap pixmap) {
window_texture->display = display;
window_texture->pixmap = pixmap;
window_texture->glx_pixmap = None;
window_texture->texture_id = 0;
window_texture->width = 0;
window_texture->height = 0;
return ngxc_pixmap_texture_on_resize(window_texture);
}
static void ngxc_pixmap_texture_cleanup(ngxc_pixmap_texture *self, int delete_texture) {
if(delete_texture && self->texture_id) {
glDeleteTextures(1, &self->texture_id);
self->texture_id = 0;
}
if(self->glx_pixmap) {
glXDestroyPixmap(self->display, self->glx_pixmap);
glXReleaseTexImageEXT(self->display, self->glx_pixmap, GLX_FRONT_EXT);
self->glx_pixmap = None;
}
}
void ngxc_pixmap_texture_deinit(ngxc_pixmap_texture *self) {
ngxc_pixmap_texture_cleanup(self, 1);
}
bool ngxc_pixmap_texture_on_resize(ngxc_pixmap_texture *self) {
ngxc_pixmap_texture_cleanup(self, 0);
GLXFBConfig *configs = NULL;
GLXPixmap glx_pixmap = None;
GLuint texture_id = 0;
int glx_pixmap_bound = 0;
const int pixmap_config[] = {
GLX_BIND_TO_TEXTURE_RGB_EXT, True,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT | GLX_WINDOW_BIT,
GLX_BIND_TO_TEXTURE_TARGETS_EXT, GLX_TEXTURE_2D_BIT_EXT,
/*GLX_BIND_TO_MIPMAP_TEXTURE_EXT, True,*/
GLX_BUFFER_SIZE, 24,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 0,
None
};
const int pixmap_attribs[] = {
GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGB_EXT,
/*GLX_MIPMAP_TEXTURE_EXT, True,*/
None
};
Window root_window;
int x, y;
unsigned int width = 0;
unsigned int height = 0;
unsigned int border_width;
unsigned int depth = 32;
if(!XGetGeometry(self->display, self->pixmap, &root_window, &x, &y, &width, &height, &border_width, &depth)) {
fprintf(stderr, "Failed to get pixmap attributes\n");
return false;
}
GLXFBConfig config;
int c;
configs = glXChooseFBConfig(self->display, 0, pixmap_config, &c);
if(!configs) {
fprintf(stderr, "Failed to choose fb config\n");
return false;
}
int found = 0;
for (int i = 0; i < c; i++) {
config = configs[i];
XVisualInfo *visual = glXGetVisualFromFBConfig(self->display, config);
if(!visual)
continue;
if((int)depth != visual->depth) {
XFree(visual);
continue;
}
XFree(visual);
found = 1;
break;
}
if(!found) {
fprintf(stderr, "No matching fb config found\n");
goto cleanup;
}
glx_pixmap = glXCreatePixmap(self->display, config, self->pixmap, pixmap_attribs);
if(!glx_pixmap) {
goto cleanup;
}
if(self->texture_id == 0) {
glGenTextures(1, &texture_id);
if(texture_id == 0) {
goto cleanup;
}
glBindTexture(GL_TEXTURE_2D, texture_id);
} else {
glBindTexture(GL_TEXTURE_2D, self->texture_id);
}
glXBindTexImageEXT(self->display, glx_pixmap, GLX_FRONT_EXT, NULL);
glx_pixmap_bound = 1;
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glBindTexture(GL_TEXTURE_2D, 0);
self->width = width;
self->height = height;
XFree(configs);
self->glx_pixmap = glx_pixmap;
if(texture_id != 0)
self->texture_id = texture_id;
return true;
cleanup:
if(texture_id != 0) glDeleteTextures(1, &texture_id);
if(glx_pixmap) glXDestroyPixmap(self->display, glx_pixmap);
if(glx_pixmap_bound) glXReleaseTexImageEXT(self->display, glx_pixmap, GLX_FRONT_EXT);
if(configs) XFree(configs);
return false;
}
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