diff options
Diffstat (limited to 'src/window_texture.c')
| -rw-r--r-- | src/window_texture.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/window_texture.c b/src/window_texture.c new file mode 100644 index 0000000..d899266 --- /dev/null +++ b/src/window_texture.c @@ -0,0 +1,120 @@ +#include "../include/window_texture.h" +#include <X11/extensions/Xcomposite.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) { + if(!x11_supports_composite_named_window_pixmap(display)) + return 1; + + window_texture->display = display; + window_texture->window = window; + window_texture->pixmap = None; + window_texture->glx_pixmap = None; + window_texture->texture_id = 0; + + XCompositeRedirectWindow(display, window, CompositeRedirectAutomatic); + return window_texture_on_resize(window_texture); +} + +static void window_texture_cleanup(WindowTexture *self) { + if(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; + } + + if(self->pixmap) { + XFreePixmap(self->display, self->pixmap); + self->pixmap = None; + } +} + +void window_texture_deinit(WindowTexture *self) { + window_texture_cleanup(self); +} + +int window_texture_on_resize(WindowTexture *self) { + window_texture_cleanup(self); + + int result = 0; + + const int pixmap_config[] = { + GLX_BIND_TO_TEXTURE_RGBA_EXT, True, + GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT, + GLX_BIND_TO_TEXTURE_TARGETS_EXT, GLX_TEXTURE_2D_BIT_EXT, + /*GLX_BIND_TO_MIPMAP_TEXTURE_EXT, True,*/ + GLX_DOUBLEBUFFER, False, + GLX_BUFFER_SIZE, 32, + GLX_ALPHA_SIZE, 8, + 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 + }; + + int c; + GLXFBConfig *configs = glXChooseFBConfig(self->display, 0, pixmap_config, &c); + if(!configs) + return 1; + + self->pixmap = XCompositeNameWindowPixmap(self->display, self->window); + if(!self->pixmap) { + result = 2; + goto cleanup; + } + + self->glx_pixmap = glXCreatePixmap(self->display, configs[0], self->pixmap, pixmap_attribs); + if(!self->glx_pixmap) { + result = 3; + goto cleanup; + } + + glGenTextures(1, &self->texture_id); + glBindTexture(GL_TEXTURE_2D, self->texture_id); + if(self->texture_id == 0) { + result = 4; + goto cleanup; + } + + glXBindTexImageEXT(self->display, self->glx_pixmap, GLX_FRONT_EXT, NULL); + /*glGenerateMipmap(GL_TEXTURE_2D)*/ + + 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_LINEAR ); + glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);//GL_LINEAR_MIPMAP_LINEAR ); + glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + + float fLargest = 0.0f; + glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &fLargest); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, fLargest); + + glBindTexture(GL_TEXTURE_2D, 0); + + cleanup: + XFree(configs); + return result; +} + +GLuint window_texture_get_opengl_texture_id(WindowTexture *self) { + return self->texture_id; +}
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