egl: Implement EGL_NOK_texture_from_pixmap

This extension allows a color buffer to be used for both rendering and
texturing.  EGL allows the use of color buffers of pbuffer drawables
for texturing, this extension extends this to allow the use of color
buffers of pixmaps too.

1 files changed, 19 insertions, 4 deletions

diff --git a/src/egl/main/eglsurface.c b/src/egl/main/eglsurface.c
index 8026a6314d..d46bdb0672 100644
--- a/src/egl/main/eglsurface.c
+++ b/src/egl/main/eglsurface.c
@@ -36,12 +36,17 @@ _eglClampSwapInterval(_EGLSurface *surf, EGLint interval)
 static EGLint
 _eglParseSurfaceAttribList(_EGLSurface *surf, const EGLint *attrib_list)
 {
+   _EGLDisplay *dpy = surf->Resource.Display;
    EGLint type = surf->Type;
+   EGLint texture_type = EGL_PBUFFER_BIT;
    EGLint i, err = EGL_SUCCESS;
 
    if (!attrib_list)
       return EGL_SUCCESS;
 
+   if (dpy->Extensions.NOK_texture_from_pixmap)
+      texture_type |= EGL_PIXMAP_BIT;
+
    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
       EGLint attr = attrib_list[i++];
       EGLint val = attrib_list[i];
@@ -125,7 +130,7 @@ _eglParseSurfaceAttribList(_EGLSurface *surf, const EGLint *attrib_list)
          surf->LargestPbuffer = !!val;
          break;
       case EGL_TEXTURE_FORMAT:
-         if (type != EGL_PBUFFER_BIT) {
+         if (!(type & texture_type)) {
             err = EGL_BAD_ATTRIBUTE;
             break;
          }
@@ -143,7 +148,7 @@ _eglParseSurfaceAttribList(_EGLSurface *surf, const EGLint *attrib_list)
          surf->TextureFormat = val;
          break;
       case EGL_TEXTURE_TARGET:
-         if (type != EGL_PBUFFER_BIT) {
+         if (!(type & texture_type)) {
             err = EGL_BAD_ATTRIBUTE;
             break;
          }
@@ -160,7 +165,7 @@ _eglParseSurfaceAttribList(_EGLSurface *surf, const EGLint *attrib_list)
          surf->TextureTarget = val;
          break;
       case EGL_MIPMAP_TEXTURE:
-         if (type != EGL_PBUFFER_BIT) {
+         if (!(type & texture_type)) {
             err = EGL_BAD_ATTRIBUTE;
             break;
          }
@@ -452,11 +457,16 @@ EGLBoolean
 _eglBindTexImage(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surface,
                  EGLint buffer)
 {
+   EGLint texture_type = EGL_PBUFFER_BIT;
+
    /* Just do basic error checking and return success/fail.
     * Drivers must implement the real stuff.
     */
 
-   if (surface->Type != EGL_PBUFFER_BIT) {
+   if (dpy->Extensions.NOK_texture_from_pixmap)
+      texture_type |= EGL_PIXMAP_BIT;
+
+   if (!(surface->Type & texture_type)) {
       _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
       return EGL_FALSE;
    }
@@ -466,6 +476,11 @@ _eglBindTexImage(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surface,
       return EGL_FALSE;
    }
 
+   if (surface->TextureTarget == EGL_NO_TEXTURE) {
+      _eglError(EGL_BAD_MATCH, "eglBindTexImage");
+      return EGL_FALSE;
+   }
+
    if (buffer != EGL_BACK_BUFFER) {
       _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
       return EGL_FALSE;