645 * - FBO support has been enabled via the system property
646 * - we can successfully create an FBO with depth capabilities
647 */
648 static jboolean
649 OGLContext_IsFBObjectExtensionAvailable(JNIEnv *env,
650 const char *extString)
651 {
652 jboolean isFBObjectEnabled = JNI_FALSE;
653 GLuint fbobjectID, textureID, depthID;
654 jint width = 1, height = 1;
655
656 J2dTraceLn(J2D_TRACE_INFO, "OGLContext_IsFBObjectExtensionAvailable");
657
658 // first see if the fbobject extension is available
659 if (!OGLContext_IsExtensionAvailable(extString,
660 "GL_EXT_framebuffer_object"))
661 {
662 return JNI_FALSE;
663 }
664
665 // next see if the fbobject system property has been enabled
666 isFBObjectEnabled =
667 JNU_GetStaticFieldByName(env, NULL,
668 "sun/java2d/opengl/OGLSurfaceData",
669 "isFBObjectEnabled", "Z").z;
670 if (!isFBObjectEnabled) {
671 J2dRlsTraceLn(J2D_TRACE_INFO,
672 "OGLContext_IsFBObjectExtensionAvailable: disabled via flag");
673 return JNI_FALSE;
674 }
675
676 // finally, create a dummy fbobject with depth capabilities to see
677 // if this configuration is supported by the drivers/hardware
678 // (first we initialize a color texture object that will be used to
679 // construct the dummy fbobject)
680 j2d_glGenTextures(1, &textureID);
681 j2d_glBindTexture(GL_TEXTURE_2D, textureID);
682 j2d_glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
683 width, height, 0,
684 GL_RGB, GL_UNSIGNED_BYTE, NULL);
|
645 * - FBO support has been enabled via the system property
646 * - we can successfully create an FBO with depth capabilities
647 */
648 static jboolean
649 OGLContext_IsFBObjectExtensionAvailable(JNIEnv *env,
650 const char *extString)
651 {
652 jboolean isFBObjectEnabled = JNI_FALSE;
653 GLuint fbobjectID, textureID, depthID;
654 jint width = 1, height = 1;
655
656 J2dTraceLn(J2D_TRACE_INFO, "OGLContext_IsFBObjectExtensionAvailable");
657
658 // first see if the fbobject extension is available
659 if (!OGLContext_IsExtensionAvailable(extString,
660 "GL_EXT_framebuffer_object"))
661 {
662 return JNI_FALSE;
663 }
664
665 // next see if the depth texture extension is available
666 if (!OGLContext_IsExtensionAvailable(extString,
667 "GL_ARB_depth_texture"))
668 {
669 return JNI_FALSE;
670 }
671
672 // next see if the fbobject system property has been enabled
673 isFBObjectEnabled =
674 JNU_GetStaticFieldByName(env, NULL,
675 "sun/java2d/opengl/OGLSurfaceData",
676 "isFBObjectEnabled", "Z").z;
677 if (!isFBObjectEnabled) {
678 J2dRlsTraceLn(J2D_TRACE_INFO,
679 "OGLContext_IsFBObjectExtensionAvailable: disabled via flag");
680 return JNI_FALSE;
681 }
682
683 // finally, create a dummy fbobject with depth capabilities to see
684 // if this configuration is supported by the drivers/hardware
685 // (first we initialize a color texture object that will be used to
686 // construct the dummy fbobject)
687 j2d_glGenTextures(1, &textureID);
688 j2d_glBindTexture(GL_TEXTURE_2D, textureID);
689 j2d_glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
690 width, height, 0,
691 GL_RGB, GL_UNSIGNED_BYTE, NULL);
|