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authordec05eba <dec05eba@protonmail.com>2022-10-16 02:08:40 +0200
committerdec05eba <dec05eba@protonmail.com>2022-10-16 04:15:09 +0200
commita7e0dbd83381377bd05a3fa988511d3713996370 (patch)
tree0e18f4c7b95aa4cf79d6646bca77ed5f03c65fb3 /src/window_texture.c
parent93d46b976730bced7a70be1617a0171600167314 (diff)
Refactor xcomposite into abstract capture api
Refactor c++ files into c files, more usable
Diffstat (limited to 'src/window_texture.c')
-rw-r--r--src/window_texture.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/src/window_texture.c b/src/window_texture.c
new file mode 100644
index 0000000..1c152ae
--- /dev/null
+++ b/src/window_texture.c
@@ -0,0 +1,176 @@
+#include "../include/window_texture.h"
+#include <X11/extensions/Xcomposite.h>
+#include <stdio.h>
+
+static int x11_supports_composite_named_window_pixmap(Display *display) {
+ int extension_major;
+ int extension_minor;
+ if(!XCompositeQueryExtension(display, &extension_major, &extension_minor))
+ return 0;
+
+ int major_version;
+ int minor_version;
+ return XCompositeQueryVersion(display, &major_version, &minor_version) && (major_version > 0 || minor_version >= 2);
+}
+
+int window_texture_init(WindowTexture *window_texture, Display *display, Window window, gsr_gl *gl) {
+ window_texture->display = display;
+ window_texture->window = window;
+ window_texture->pixmap = None;
+ window_texture->glx_pixmap = None;
+ window_texture->texture_id = 0;
+ window_texture->redirected = 0;
+ window_texture->gl = gl;
+
+ if(!x11_supports_composite_named_window_pixmap(display))
+ return 1;
+
+ XCompositeRedirectWindow(display, window, CompositeRedirectAutomatic);
+ window_texture->redirected = 1;
+ return window_texture_on_resize(window_texture);
+}
+
+static void window_texture_cleanup(WindowTexture *self, int delete_texture) {
+ if(delete_texture && self->texture_id) {
+ self->gl->glDeleteTextures(1, &self->texture_id);
+ self->texture_id = 0;
+ }
+
+ if(self->glx_pixmap) {
+ self->gl->glXDestroyPixmap(self->display, self->glx_pixmap);
+ self->gl->glXReleaseTexImageEXT(self->display, self->glx_pixmap, GLX_FRONT_EXT);
+ self->glx_pixmap = None;
+ }
+
+ if(self->pixmap) {
+ XFreePixmap(self->display, self->pixmap);
+ self->pixmap = None;
+ }
+}
+
+void window_texture_deinit(WindowTexture *self) {
+ if(self->redirected) {
+ XCompositeUnredirectWindow(self->display, self->window, CompositeRedirectAutomatic);
+ self->redirected = 0;
+ }
+ window_texture_cleanup(self, 1);
+}
+
+int window_texture_on_resize(WindowTexture *self) {
+ window_texture_cleanup(self, 0);
+
+ int result = 0;
+ GLXFBConfig *configs = NULL;
+ Pixmap pixmap = None;
+ GLXPixmap glx_pixmap = None;
+ unsigned int 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
+ };
+
+ XWindowAttributes attr;
+ if (!XGetWindowAttributes(self->display, self->window, &attr)) {
+ fprintf(stderr, "Failed to get window attributes\n");
+ return 1;
+ }
+
+ GLXFBConfig config;
+ int c;
+ configs = self->gl->glXChooseFBConfig(self->display, 0, pixmap_config, &c);
+ if(!configs) {
+ fprintf(stderr, "Failed to choose fb config\n");
+ return 1;
+ }
+
+ int found = 0;
+ for (int i = 0; i < c; i++) {
+ config = configs[i];
+ XVisualInfo *visual = self->gl->glXGetVisualFromFBConfig(self->display, config);
+ if (!visual)
+ continue;
+
+ if (attr.depth != visual->depth) {
+ XFree(visual);
+ continue;
+ }
+ XFree(visual);
+ found = 1;
+ break;
+ }
+
+ if(!found) {
+ fprintf(stderr, "No matching fb config found\n");
+ result = 1;
+ goto cleanup;
+ }
+
+ pixmap = XCompositeNameWindowPixmap(self->display, self->window);
+ if(!pixmap) {
+ result = 2;
+ goto cleanup;
+ }
+
+ glx_pixmap = self->gl->glXCreatePixmap(self->display, config, pixmap, pixmap_attribs);
+ if(!glx_pixmap) {
+ result = 3;
+ goto cleanup;
+ }
+
+ if(self->texture_id == 0) {
+ self->gl->glGenTextures(1, &texture_id);
+ if(texture_id == 0) {
+ result = 4;
+ goto cleanup;
+ }
+ self->gl->glBindTexture(GL_TEXTURE_2D, texture_id);
+ } else {
+ self->gl->glBindTexture(GL_TEXTURE_2D, self->texture_id);
+ }
+
+ self->gl->glXBindTexImageEXT(self->display, glx_pixmap, GLX_FRONT_EXT, NULL);
+ glx_pixmap_bound = 1;
+
+ self->gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ self->gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ self->gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ self->gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+ self->gl->glBindTexture(GL_TEXTURE_2D, 0);
+
+ XFree(configs);
+ self->pixmap = pixmap;
+ self->glx_pixmap = glx_pixmap;
+ if(texture_id != 0)
+ self->texture_id = texture_id;
+ return 0;
+
+ cleanup:
+ if(texture_id != 0) self->gl->glDeleteTextures(1, &texture_id);
+ if(glx_pixmap) self->gl->glXDestroyPixmap(self->display, glx_pixmap);
+ if(glx_pixmap_bound) self->gl->glXReleaseTexImageEXT(self->display, glx_pixmap, GLX_FRONT_EXT);
+ if(pixmap) XFreePixmap(self->display, pixmap);
+ if(configs) XFree(configs);
+ return result;
+}
+
+unsigned int window_texture_get_opengl_texture_id(WindowTexture *self) {
+ return self->texture_id;
+}